/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:41:55,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:41:55,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:41:55,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:41:55,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 16:41:55,768 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:41:55,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:41:55,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:41:55,769 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:41:55,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:41:55,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:41:55,771 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:41:55,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:41:55,772 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:41:55,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:41:55,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:41:55,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:41:55,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:41:55,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:41:55,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:41:55,773 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:41:55,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:41:55,774 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:41:55,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:41:55,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:41:55,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:41:55,774 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:41:55,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:41:55,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:41:55,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:41:55,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:41:55,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:41:55,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:41:55,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:41:55,775 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:41:55,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:41:55,776 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:41:55,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:41:56,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:41:56,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:41:56,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:41:56,127 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:41:56,129 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:41:56,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl [2021-06-05 16:41:56,130 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl' [2021-06-05 16:41:56,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:41:56,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:41:56,181 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:41:56,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:41:56,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:41:56,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:41:56" (1/1) ... [2021-06-05 16:41:56,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:41:56" (1/1) ... [2021-06-05 16:41:56,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:41:56,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:41:56,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:41:56,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:41:56,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:41:56" (1/1) ... [2021-06-05 16:41:56,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:41:56" (1/1) ... [2021-06-05 16:41:56,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:41:56" (1/1) ... [2021-06-05 16:41:56,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:41:56" (1/1) ... [2021-06-05 16:41:56,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:41:56" (1/1) ... [2021-06-05 16:41:56,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:41:56" (1/1) ... [2021-06-05 16:41:56,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:41:56" (1/1) ... [2021-06-05 16:41:56,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:41:56,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:41:56,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:41:56,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:41:56,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:41:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:41:56,284 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:41:56,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:41:56,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:41:56,285 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:41:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:41:56,285 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:41:56,285 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:41:56,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:41:56,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:41:56,286 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:41:56,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:41:56,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:41:56,287 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:41:56,558 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:41:56,559 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:41:56,560 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:41:56 BoogieIcfgContainer [2021-06-05 16:41:56,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:41:56,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:41:56,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:41:56,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:41:56,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:41:56" (1/2) ... [2021-06-05 16:41:56,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7caf44d6 and model type mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:41:56, skipping insertion in model container [2021-06-05 16:41:56,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:41:56" (2/2) ... [2021-06-05 16:41:56,567 INFO L111 eAbstractionObserver]: Analyzing ICFG mts-array.wvr.bpl [2021-06-05 16:41:56,592 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:41:56,592 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:41:56,593 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:41:56,593 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:41:56,658 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:41:56,685 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:41:56,713 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:41:56,713 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:41:56,713 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:41:56,714 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:41:56,714 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:41:56,714 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:41:56,715 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:41:56,715 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:41:56,727 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 16:41:56,751 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:56,754 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:41:56,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:56,765 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:56,766 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:56,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:56,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1113490327, now seen corresponding path program 1 times [2021-06-05 16:41:56,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:56,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559382358] [2021-06-05 16:41:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:56,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:56,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559382358] [2021-06-05 16:41:56,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559382358] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:41:56,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:41:56,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:41:56,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088563447] [2021-06-05 16:41:56,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:41:56,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:56,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:41:56,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:41:56,963 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:57,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:57,018 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-06-05 16:41:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:41:57,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 16:41:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:57,029 INFO L225 Difference]: With dead ends: 154 [2021-06-05 16:41:57,029 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 16:41:57,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:41:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 16:41:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-06-05 16:41:57,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 16:41:57,070 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-06-05 16:41:57,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:57,071 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 16:41:57,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 16:41:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:41:57,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:57,073 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:57,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:41:57,074 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:57,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2043191081, now seen corresponding path program 1 times [2021-06-05 16:41:57,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:57,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277220753] [2021-06-05 16:41:57,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:57,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:57,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277220753] [2021-06-05 16:41:57,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277220753] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:41:57,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:41:57,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:41:57,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589137499] [2021-06-05 16:41:57,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:41:57,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:57,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:41:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:41:57,116 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:57,160 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-06-05 16:41:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:41:57,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 16:41:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:57,166 INFO L225 Difference]: With dead ends: 158 [2021-06-05 16:41:57,166 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 16:41:57,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:41:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 16:41:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-06-05 16:41:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:57,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 16:41:57,191 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 16:41:57,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:57,191 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 16:41:57,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:57,192 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 16:41:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:41:57,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:57,199 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:57,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:41:57,200 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash -219246905, now seen corresponding path program 1 times [2021-06-05 16:41:57,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:57,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114547778] [2021-06-05 16:41:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:57,675 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-06-05 16:41:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:57,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:57,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114547778] [2021-06-05 16:41:57,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114547778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:57,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502444492] [2021-06-05 16:41:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:57,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:41:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:58,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:58,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:58,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-05 16:41:58,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:58,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:58,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:58,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-06-05 16:41:58,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:58,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:58,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:58,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-05 16:41:58,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:58,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:41:58,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2021-06-05 16:41:58,456 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:58,510 INFO L628 ElimStorePlain]: treesize reduction 54, result has 43.2 percent of original size [2021-06-05 16:41:58,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:41:58,515 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-06-05 16:41:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:58,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502444492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:58,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:58,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:41:58,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706754858] [2021-06-05 16:41:58,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:41:58,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:58,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:41:58,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:41:58,569 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:58,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:58,900 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 16:41:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:41:58,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:41:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:58,908 INFO L225 Difference]: With dead ends: 330 [2021-06-05 16:41:58,908 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 16:41:58,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 618.8ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:41:58,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 16:41:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 16:41:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 16:41:58,931 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 16:41:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:58,932 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 16:41:58,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:58,932 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 16:41:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:41:58,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:58,933 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:59,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 16:41:59,155 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:59,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:59,156 INFO L82 PathProgramCache]: Analyzing trace with hash -387055997, now seen corresponding path program 2 times [2021-06-05 16:41:59,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:59,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265661265] [2021-06-05 16:41:59,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:59,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:59,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265661265] [2021-06-05 16:41:59,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265661265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:59,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813779719] [2021-06-05 16:41:59,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:59,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:41:59,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:59,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:41:59,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:59,806 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:41:59,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:41:59,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:59,824 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:41:59,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2021-06-05 16:41:59,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:59,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:41:59,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:41:59,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:59,851 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:41:59,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 16:41:59,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:41:59,896 INFO L628 ElimStorePlain]: treesize reduction 49, result has 38.0 percent of original size [2021-06-05 16:41:59,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:41:59,902 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:31 [2021-06-05 16:41:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:59,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813779719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:59,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:59,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 16:41:59,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119348339] [2021-06-05 16:41:59,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:41:59,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:59,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:41:59,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:41:59,982 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:00,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:00,474 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 16:42:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:42:00,475 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:42:00,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:00,477 INFO L225 Difference]: With dead ends: 374 [2021-06-05 16:42:00,477 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 16:42:00,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 636.5ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:42:00,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 16:42:00,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 16:42:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 16:42:00,501 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 16:42:00,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:00,501 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 16:42:00,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:00,501 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 16:42:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:42:00,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:00,503 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:00,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 16:42:00,725 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:00,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:00,725 INFO L82 PathProgramCache]: Analyzing trace with hash -88282549, now seen corresponding path program 3 times [2021-06-05 16:42:00,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:00,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646374110] [2021-06-05 16:42:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:00,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:00,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646374110] [2021-06-05 16:42:00,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646374110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:00,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319980138] [2021-06-05 16:42:00,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:01,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:42:01,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:01,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 16:42:01,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:01,242 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:42:01,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:42:01,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:01,252 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:42:01,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2021-06-05 16:42:01,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:01,305 INFO L628 ElimStorePlain]: treesize reduction 38, result has 54.8 percent of original size [2021-06-05 16:42:01,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:42:01,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:01,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:01,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:42:01,337 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:173, output treesize:27 [2021-06-05 16:42:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:01,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319980138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:01,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:01,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:42:01,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078668864] [2021-06-05 16:42:01,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:01,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:01,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:01,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:01,435 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:01,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:01,740 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-05 16:42:01,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:42:01,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:42:01,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:01,741 INFO L225 Difference]: With dead ends: 296 [2021-06-05 16:42:01,741 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 16:42:01,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 522.6ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:42:01,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 16:42:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-05 16:42:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 16:42:01,749 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 16:42:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:01,749 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 16:42:01,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 16:42:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:42:01,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:01,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:01,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 16:42:01,973 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:01,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1482543051, now seen corresponding path program 4 times [2021-06-05 16:42:01,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:01,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148616922] [2021-06-05 16:42:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:02,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:02,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148616922] [2021-06-05 16:42:02,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148616922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:02,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917493421] [2021-06-05 16:42:02,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:02,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:42:02,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:02,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:42:02,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:02,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:02,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:42:02,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:02,632 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:42:02,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-06-05 16:42:02,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:02,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:02,695 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:42:02,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:42:02,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:02,705 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:42:02,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2021-06-05 16:42:02,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:02,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:02,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:42:02,762 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:73 [2021-06-05 16:42:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:02,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917493421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:02,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:02,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:42:02,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80337278] [2021-06-05 16:42:02,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:02,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:02,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:02,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:02,898 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:03,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:03,296 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 16:42:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:42:03,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:42:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:03,299 INFO L225 Difference]: With dead ends: 425 [2021-06-05 16:42:03,299 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 16:42:03,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 591.7ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:42:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 16:42:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 16:42:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 16:42:03,310 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 16:42:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:03,310 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 16:42:03,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:03,311 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 16:42:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:03,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:03,312 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:03,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:03,531 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:03,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1258502875, now seen corresponding path program 5 times [2021-06-05 16:42:03,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:03,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333494674] [2021-06-05 16:42:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:03,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:03,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333494674] [2021-06-05 16:42:03,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333494674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:03,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94677620] [2021-06-05 16:42:03,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:03,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:42:03,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:03,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:03,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:03,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94677620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:03,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:03,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:42:03,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190413537] [2021-06-05 16:42:03,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:42:03,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:03,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:42:03,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:42:03,720 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:04,135 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 16:42:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:42:04,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:04,139 INFO L225 Difference]: With dead ends: 619 [2021-06-05 16:42:04,139 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 16:42:04,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:42:04,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 16:42:04,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 16:42:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 16:42:04,152 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 16:42:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:04,152 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 16:42:04,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 16:42:04,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:04,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:04,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:04,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 16:42:04,378 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:04,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2060145577, now seen corresponding path program 6 times [2021-06-05 16:42:04,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:04,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311317726] [2021-06-05 16:42:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:04,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:04,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311317726] [2021-06-05 16:42:04,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311317726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:04,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915508372] [2021-06-05 16:42:04,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:04,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:42:04,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:04,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:04,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915508372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:04,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:04,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:42:04,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638896654] [2021-06-05 16:42:04,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:04,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:04,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:04,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:04,582 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:05,403 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 16:42:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:42:05,403 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:05,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:05,410 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 16:42:05,410 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 16:42:05,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:42:05,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 16:42:05,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 16:42:05,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 16:42:05,426 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 16:42:05,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:05,426 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 16:42:05,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:05,426 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 16:42:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:05,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:05,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:05,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 16:42:05,653 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:05,653 INFO L82 PathProgramCache]: Analyzing trace with hash -705917075, now seen corresponding path program 7 times [2021-06-05 16:42:05,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:05,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872386030] [2021-06-05 16:42:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:05,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:05,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872386030] [2021-06-05 16:42:05,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872386030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:05,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133084910] [2021-06-05 16:42:05,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:05,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:05,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133084910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:05,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:05,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:42:05,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753399920] [2021-06-05 16:42:05,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:05,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:05,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:05,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:05,870 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:06,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:06,588 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 16:42:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:42:06,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:06,593 INFO L225 Difference]: With dead ends: 951 [2021-06-05 16:42:06,593 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 16:42:06,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 477.3ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:42:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 16:42:06,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 16:42:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 16:42:06,623 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 16:42:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:06,624 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 16:42:06,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:06,624 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 16:42:06,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:06,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:06,625 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:06,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:06,841 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:06,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:06,841 INFO L82 PathProgramCache]: Analyzing trace with hash -731730967, now seen corresponding path program 1 times [2021-06-05 16:42:06,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:06,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755147375] [2021-06-05 16:42:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:06,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:06,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755147375] [2021-06-05 16:42:06,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755147375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:06,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049615892] [2021-06-05 16:42:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:06,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:42:06,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:06,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049615892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:06,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:06,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:42:06,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630563739] [2021-06-05 16:42:06,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:42:06,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:06,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:42:06,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:42:06,973 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:07,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:07,100 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 16:42:07,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:42:07,100 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:07,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:07,104 INFO L225 Difference]: With dead ends: 669 [2021-06-05 16:42:07,104 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 16:42:07,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 16:42:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 16:42:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 16:42:07,118 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 16:42:07,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:07,118 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 16:42:07,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:07,118 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 16:42:07,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:07,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:07,119 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:07,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 16:42:07,341 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:07,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1168699675, now seen corresponding path program 8 times [2021-06-05 16:42:07,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:07,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981136849] [2021-06-05 16:42:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:07,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:07,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981136849] [2021-06-05 16:42:07,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981136849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:07,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540980001] [2021-06-05 16:42:07,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:07,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:07,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:07,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:07,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:07,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540980001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:07,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:07,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:42:07,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193034615] [2021-06-05 16:42:07,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:07,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:07,517 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:07,700 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 16:42:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:42:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:07,703 INFO L225 Difference]: With dead ends: 710 [2021-06-05 16:42:07,703 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 16:42:07,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:42:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 16:42:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 16:42:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 16:42:07,717 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 16:42:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:07,718 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 16:42:07,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 16:42:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:07,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:07,719 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:07,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:07,933 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:07,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:07,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1874657007, now seen corresponding path program 2 times [2021-06-05 16:42:07,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:07,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990447517] [2021-06-05 16:42:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:07,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:07,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990447517] [2021-06-05 16:42:07,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990447517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:07,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697147080] [2021-06-05 16:42:07,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:07,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:08,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:08,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:42:08,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:08,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697147080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:08,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:08,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:42:08,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597544944] [2021-06-05 16:42:08,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:42:08,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:08,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:42:08,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:42:08,064 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:08,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:08,191 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 16:42:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:42:08,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:08,196 INFO L225 Difference]: With dead ends: 830 [2021-06-05 16:42:08,196 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 16:42:08,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:08,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 16:42:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 16:42:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 16:42:08,214 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 16:42:08,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:08,215 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 16:42:08,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 16:42:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:08,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:08,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:08,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:08,439 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:08,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:08,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1073628723, now seen corresponding path program 9 times [2021-06-05 16:42:08,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:08,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926807065] [2021-06-05 16:42:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:08,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:08,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926807065] [2021-06-05 16:42:08,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926807065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:08,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493861260] [2021-06-05 16:42:08,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:08,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:42:08,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:08,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:08,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:08,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493861260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:08,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:08,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:42:08,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344872363] [2021-06-05 16:42:08,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:42:08,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:08,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:42:08,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:42:08,631 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:09,016 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 16:42:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:42:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:09,023 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 16:42:09,023 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 16:42:09,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:42:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 16:42:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 16:42:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 16:42:09,046 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 16:42:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:09,047 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 16:42:09,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:09,047 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 16:42:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:09,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:09,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:09,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 16:42:09,269 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1858542817, now seen corresponding path program 10 times [2021-06-05 16:42:09,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:09,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475237786] [2021-06-05 16:42:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:09,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:09,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475237786] [2021-06-05 16:42:09,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475237786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:09,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337513825] [2021-06-05 16:42:09,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:09,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:42:09,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:09,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337513825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:09,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:09,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:42:09,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337444511] [2021-06-05 16:42:09,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:42:09,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:09,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:42:09,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:42:09,436 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:09,897 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 16:42:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:42:09,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:09,904 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 16:42:09,904 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 16:42:09,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:42:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 16:42:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 16:42:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 16:42:09,926 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 16:42:09,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:09,926 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 16:42:09,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 16:42:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:09,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:09,928 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:10,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:10,148 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:10,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:10,148 INFO L82 PathProgramCache]: Analyzing trace with hash 775520161, now seen corresponding path program 11 times [2021-06-05 16:42:10,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:10,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426264315] [2021-06-05 16:42:10,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:10,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:10,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426264315] [2021-06-05 16:42:10,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426264315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:10,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922652405] [2021-06-05 16:42:10,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:10,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:10,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:10,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:10,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:10,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922652405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:10,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:10,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:42:10,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782422647] [2021-06-05 16:42:10,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:10,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:10,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:10,341 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:10,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:10,572 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 16:42:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:42:10,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:10,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:10,577 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 16:42:10,578 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 16:42:10,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:42:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 16:42:10,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 16:42:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 16:42:10,599 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 16:42:10,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:10,599 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 16:42:10,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 16:42:10,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:10,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:10,601 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:10,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 16:42:10,817 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2048369017, now seen corresponding path program 12 times [2021-06-05 16:42:10,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:10,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242069055] [2021-06-05 16:42:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:10,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:10,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242069055] [2021-06-05 16:42:10,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242069055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:10,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862062183] [2021-06-05 16:42:10,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:10,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:42:10,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:10,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:10,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:10,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862062183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:10,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:10,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:42:10,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142071858] [2021-06-05 16:42:10,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:10,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:10,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:10,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:10,996 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:11,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:11,255 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 16:42:11,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:42:11,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:11,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:11,260 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 16:42:11,260 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 16:42:11,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:42:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 16:42:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 16:42:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:11,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 16:42:11,281 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 16:42:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:11,281 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 16:42:11,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 16:42:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:11,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:11,283 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:11,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:11,506 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:11,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:11,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1490304735, now seen corresponding path program 13 times [2021-06-05 16:42:11,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:11,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393015487] [2021-06-05 16:42:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:11,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:11,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393015487] [2021-06-05 16:42:11,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393015487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:11,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654297061] [2021-06-05 16:42:11,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:11,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:11,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:11,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654297061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:11,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:11,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:42:11,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346629513] [2021-06-05 16:42:11,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:42:11,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:11,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:42:11,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:42:11,635 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:12,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:12,010 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 16:42:12,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:42:12,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:12,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:12,018 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 16:42:12,018 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 16:42:12,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:42:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 16:42:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 16:42:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 16:42:12,043 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 16:42:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:12,043 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 16:42:12,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 16:42:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:12,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:12,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:12,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 16:42:12,268 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:12,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:12,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1541712485, now seen corresponding path program 14 times [2021-06-05 16:42:12,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:12,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017485755] [2021-06-05 16:42:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:12,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:12,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017485755] [2021-06-05 16:42:12,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017485755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:12,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930226577] [2021-06-05 16:42:12,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:12,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:12,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:12,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:12,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:12,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930226577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:12,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:12,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:42:12,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403997718] [2021-06-05 16:42:12,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:12,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:12,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:12,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:12,477 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:13,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:13,251 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 16:42:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:42:13,252 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:13,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:13,263 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 16:42:13,263 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 16:42:13,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:42:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 16:42:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 16:42:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 16:42:13,295 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 16:42:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:13,295 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 16:42:13,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 16:42:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:13,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:13,297 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:13,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 16:42:13,513 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1224350167, now seen corresponding path program 15 times [2021-06-05 16:42:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:13,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573201684] [2021-06-05 16:42:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:13,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:13,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573201684] [2021-06-05 16:42:13,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573201684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:13,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891787985] [2021-06-05 16:42:13,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:13,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:42:13,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:13,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:13,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891787985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:13,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:13,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:42:13,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875812939] [2021-06-05 16:42:13,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:13,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:13,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:13,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:13,663 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:14,356 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 16:42:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:42:14,356 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:14,364 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 16:42:14,365 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 16:42:14,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:42:14,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 16:42:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 16:42:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 16:42:14,399 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 16:42:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:14,399 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 16:42:14,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 16:42:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:14,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:14,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:14,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:14,623 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:14,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash 936318707, now seen corresponding path program 16 times [2021-06-05 16:42:14,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:14,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017748711] [2021-06-05 16:42:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:14,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:14,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017748711] [2021-06-05 16:42:14,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017748711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:14,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331242033] [2021-06-05 16:42:14,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:14,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:42:14,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:14,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:14,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:14,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331242033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:14,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:14,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:42:14,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540197379] [2021-06-05 16:42:14,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:42:14,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:14,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:42:14,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:42:14,809 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:15,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:15,477 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 16:42:15,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:42:15,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:15,494 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 16:42:15,494 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 16:42:15,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:42:15,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 16:42:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 16:42:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 16:42:15,554 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 16:42:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:15,554 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 16:42:15,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 16:42:15,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:15,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:15,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:15,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 16:42:15,777 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:15,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:15,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2008635681, now seen corresponding path program 17 times [2021-06-05 16:42:15,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:15,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659172241] [2021-06-05 16:42:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:15,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:15,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659172241] [2021-06-05 16:42:15,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659172241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:15,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811504580] [2021-06-05 16:42:15,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:15,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:42:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:15,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:15,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:15,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811504580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:15,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:15,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:42:15,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815798895] [2021-06-05 16:42:15,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:42:15,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:15,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:42:15,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:42:15,941 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:16,474 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 16:42:16,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:42:16,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:16,480 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 16:42:16,480 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 16:42:16,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:42:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 16:42:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 16:42:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 16:42:16,512 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 16:42:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:16,513 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 16:42:16,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 16:42:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:16,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:16,515 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:16,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:16,729 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2817957, now seen corresponding path program 18 times [2021-06-05 16:42:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:16,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844828530] [2021-06-05 16:42:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:16,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:16,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844828530] [2021-06-05 16:42:16,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844828530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:16,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462626626] [2021-06-05 16:42:16,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:16,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:42:16,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:16,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:16,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462626626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:16,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:16,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:42:16,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257621767] [2021-06-05 16:42:16,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:16,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:16,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:16,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:16,939 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:17,610 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 16:42:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:42:17,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:17,617 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 16:42:17,617 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 16:42:17,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:42:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 16:42:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 16:42:17,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 16:42:17,647 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 16:42:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:17,647 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 16:42:17,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 16:42:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:17,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:17,649 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:17,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 16:42:17,872 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:17,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:17,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1052559437, now seen corresponding path program 19 times [2021-06-05 16:42:17,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:17,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992487298] [2021-06-05 16:42:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:17,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:17,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992487298] [2021-06-05 16:42:17,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992487298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:17,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695569023] [2021-06-05 16:42:17,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:17,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:17,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:18,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695569023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:18,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:18,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:42:18,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377387287] [2021-06-05 16:42:18,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:18,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:18,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:18,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:18,044 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:18,850 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 16:42:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:42:18,851 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:18,856 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 16:42:18,856 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 16:42:18,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 486.8ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:42:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 16:42:18,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 16:42:18,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 16:42:18,881 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 16:42:18,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:18,881 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 16:42:18,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:18,881 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 16:42:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:18,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:18,883 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:19,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 16:42:19,097 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:19,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1615861683, now seen corresponding path program 3 times [2021-06-05 16:42:19,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:19,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017666831] [2021-06-05 16:42:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:19,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:19,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017666831] [2021-06-05 16:42:19,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017666831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:19,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121830791] [2021-06-05 16:42:19,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:19,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:42:19,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:19,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:42:19,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:19,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121830791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:19,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:19,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:42:19,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337208340] [2021-06-05 16:42:19,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:42:19,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:19,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:42:19,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:42:19,224 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:19,300 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 16:42:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:42:19,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:19,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:19,302 INFO L225 Difference]: With dead ends: 929 [2021-06-05 16:42:19,302 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 16:42:19,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:42:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 16:42:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 16:42:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 16:42:19,314 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 16:42:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:19,314 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 16:42:19,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 16:42:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:19,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:19,316 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:19,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:19,533 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:19,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:19,533 INFO L82 PathProgramCache]: Analyzing trace with hash -685661939, now seen corresponding path program 20 times [2021-06-05 16:42:19,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:19,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447954738] [2021-06-05 16:42:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:19,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:19,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447954738] [2021-06-05 16:42:19,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447954738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:19,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640197781] [2021-06-05 16:42:19,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:19,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:19,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:19,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:19,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:19,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640197781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:19,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:19,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:42:19,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732171791] [2021-06-05 16:42:19,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:42:19,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:19,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:42:19,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:42:19,666 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:19,940 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 16:42:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:42:19,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:19,943 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 16:42:19,943 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 16:42:19,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:42:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 16:42:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 16:42:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 16:42:19,962 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 16:42:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:19,962 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 16:42:19,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 16:42:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:19,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:19,966 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:20,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 16:42:20,184 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:20,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:20,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1217017513, now seen corresponding path program 21 times [2021-06-05 16:42:20,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:20,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303427270] [2021-06-05 16:42:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:20,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:20,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303427270] [2021-06-05 16:42:20,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303427270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:20,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174768154] [2021-06-05 16:42:20,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:20,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:42:20,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:20,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:20,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:20,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174768154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:20,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:20,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:42:20,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940891614] [2021-06-05 16:42:20,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:42:20,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:20,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:42:20,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:42:20,306 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:20,589 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 16:42:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:42:20,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:20,592 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 16:42:20,593 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 16:42:20,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:42:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 16:42:20,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 16:42:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 16:42:20,614 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 16:42:20,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:20,614 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 16:42:20,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 16:42:20,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:20,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:20,616 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:20,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:20,839 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:20,839 INFO L82 PathProgramCache]: Analyzing trace with hash -2131830039, now seen corresponding path program 22 times [2021-06-05 16:42:20,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:20,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2189070] [2021-06-05 16:42:20,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:20,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:20,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2189070] [2021-06-05 16:42:20,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2189070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:20,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611899786] [2021-06-05 16:42:20,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:20,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:42:20,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:20,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:20,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:20,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611899786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:20,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:20,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:42:20,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380300139] [2021-06-05 16:42:20,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:42:20,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:20,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:42:20,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:42:20,946 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:21,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:21,131 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 16:42:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:42:21,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:21,134 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 16:42:21,134 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 16:42:21,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:42:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 16:42:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 16:42:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 16:42:21,160 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 16:42:21,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:21,160 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 16:42:21,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 16:42:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:21,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:21,162 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:21,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 16:42:21,369 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1241435117, now seen corresponding path program 23 times [2021-06-05 16:42:21,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:21,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796367791] [2021-06-05 16:42:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:21,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:21,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796367791] [2021-06-05 16:42:21,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796367791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:21,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915939023] [2021-06-05 16:42:21,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:21,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:42:21,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:21,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:21,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:21,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915939023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:21,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:21,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:42:21,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980203878] [2021-06-05 16:42:21,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:42:21,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:21,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:42:21,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:42:21,494 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:21,732 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 16:42:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:42:21,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:21,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:21,735 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 16:42:21,735 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 16:42:21,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:42:21,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 16:42:21,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 16:42:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 16:42:21,752 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 16:42:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:21,752 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 16:42:21,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 16:42:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:21,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:21,753 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:21,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 16:42:21,954 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:21,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:21,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1243112745, now seen corresponding path program 24 times [2021-06-05 16:42:21,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:21,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678942478] [2021-06-05 16:42:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:21,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:21,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678942478] [2021-06-05 16:42:21,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678942478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:21,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783760111] [2021-06-05 16:42:21,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:22,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:42:22,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:22,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:22,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:22,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783760111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:22,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:22,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:42:22,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194603991] [2021-06-05 16:42:22,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:22,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:22,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:22,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:22,103 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:22,640 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 16:42:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:42:22,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:22,644 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 16:42:22,644 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 16:42:22,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:42:22,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 16:42:22,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 16:42:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 16:42:22,671 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 16:42:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:22,671 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 16:42:22,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 16:42:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:22,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:22,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:22,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:22,893 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:22,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:22,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1522949907, now seen corresponding path program 25 times [2021-06-05 16:42:22,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:22,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967298152] [2021-06-05 16:42:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:22,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:22,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967298152] [2021-06-05 16:42:22,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967298152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:22,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912166007] [2021-06-05 16:42:22,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:22,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:22,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:23,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912166007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:23,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:23,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:42:23,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727645470] [2021-06-05 16:42:23,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:23,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:23,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:23,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:23,054 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:23,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:23,534 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 16:42:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:42:23,534 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:23,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:23,537 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 16:42:23,537 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 16:42:23,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:42:23,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 16:42:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 16:42:23,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:42:23,580 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:42:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:23,581 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:42:23,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:42:23,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:23,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:23,583 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:23,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:23,794 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:23,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:23,795 INFO L82 PathProgramCache]: Analyzing trace with hash 637718967, now seen corresponding path program 26 times [2021-06-05 16:42:23,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:23,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223335544] [2021-06-05 16:42:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:23,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:23,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223335544] [2021-06-05 16:42:23,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223335544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:23,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022458750] [2021-06-05 16:42:23,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:23,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:23,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:23,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:23,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:23,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022458750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:23,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:23,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:42:23,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074922196] [2021-06-05 16:42:23,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:42:23,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:23,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:42:23,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:42:23,946 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:24,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:24,333 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 16:42:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:42:24,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:24,336 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 16:42:24,336 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 16:42:24,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:42:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 16:42:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 16:42:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:42:24,355 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:42:24,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:24,355 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:42:24,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:42:24,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:24,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:24,357 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:24,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:24,561 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1710035941, now seen corresponding path program 27 times [2021-06-05 16:42:24,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:24,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687212392] [2021-06-05 16:42:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:24,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:24,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687212392] [2021-06-05 16:42:24,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687212392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:24,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932676084] [2021-06-05 16:42:24,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:24,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:42:24,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:24,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:24,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:24,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932676084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:24,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:24,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:42:24,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886780389] [2021-06-05 16:42:24,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:42:24,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:42:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:42:24,715 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:25,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:25,062 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 16:42:25,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:42:25,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:25,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:25,065 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 16:42:25,065 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 16:42:25,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:42:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 16:42:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 16:42:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:42:25,097 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:42:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:25,097 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:42:25,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:42:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:25,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:25,099 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:25,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:25,309 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:25,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:25,309 INFO L82 PathProgramCache]: Analyzing trace with hash -295781783, now seen corresponding path program 28 times [2021-06-05 16:42:25,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:25,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366607739] [2021-06-05 16:42:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:25,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:25,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366607739] [2021-06-05 16:42:25,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366607739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:25,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97125366] [2021-06-05 16:42:25,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:25,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:42:25,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:25,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:25,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:25,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97125366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:25,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:25,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:42:25,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850295033] [2021-06-05 16:42:25,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:25,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:25,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:25,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:25,481 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:25,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:25,855 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 16:42:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:42:25,855 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:25,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:25,858 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 16:42:25,858 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 16:42:25,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:42:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 16:42:25,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 16:42:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:25,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:42:25,874 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:42:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:25,875 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:42:25,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:25,875 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:42:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:25,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:25,876 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:26,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:26,093 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1351159177, now seen corresponding path program 29 times [2021-06-05 16:42:26,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:26,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501551019] [2021-06-05 16:42:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:26,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:26,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501551019] [2021-06-05 16:42:26,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501551019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:26,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120209808] [2021-06-05 16:42:26,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:26,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:42:26,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:26,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:26,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:26,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120209808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:26,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:26,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:42:26,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501778466] [2021-06-05 16:42:26,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:26,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:26,220 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:26,591 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 16:42:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:42:26,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:26,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:26,594 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 16:42:26,595 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 16:42:26,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:42:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 16:42:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 16:42:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:42:26,628 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:42:26,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:26,628 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:42:26,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:42:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:26,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:26,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:26,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 16:42:26,852 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1252113, now seen corresponding path program 30 times [2021-06-05 16:42:26,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:26,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088177587] [2021-06-05 16:42:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:26,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:26,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088177587] [2021-06-05 16:42:26,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088177587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:26,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238565793] [2021-06-05 16:42:26,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:26,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:42:26,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:26,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:26,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238565793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:26,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:26,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:42:26,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877472147] [2021-06-05 16:42:26,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:42:26,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:26,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:42:26,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:42:26,977 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:27,305 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 16:42:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:42:27,306 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:27,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:27,308 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 16:42:27,308 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 16:42:27,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:42:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 16:42:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 16:42:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 16:42:27,326 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 16:42:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:27,326 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 16:42:27,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:27,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 16:42:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:27,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:27,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:27,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:27,534 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:27,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1073569087, now seen corresponding path program 31 times [2021-06-05 16:42:27,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:27,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730259801] [2021-06-05 16:42:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:27,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:27,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730259801] [2021-06-05 16:42:27,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730259801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:27,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711073868] [2021-06-05 16:42:27,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:27,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:27,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:27,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711073868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:27,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:27,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:42:27,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327838648] [2021-06-05 16:42:27,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:42:27,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:27,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:42:27,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:42:27,646 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:27,914 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 16:42:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:42:27,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:27,917 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 16:42:27,917 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 16:42:27,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:42:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 16:42:27,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 16:42:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 16:42:27,940 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 16:42:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:27,940 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 16:42:27,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:27,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 16:42:27,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:27,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:27,942 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:28,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 16:42:28,165 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:28,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1960561683, now seen corresponding path program 32 times [2021-06-05 16:42:28,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:28,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036770353] [2021-06-05 16:42:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:28,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:28,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036770353] [2021-06-05 16:42:28,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036770353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:28,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628319121] [2021-06-05 16:42:28,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:28,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:28,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:28,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:28,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:28,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628319121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:28,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:28,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:42:28,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828095679] [2021-06-05 16:42:28,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:42:28,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:28,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:42:28,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:42:28,298 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:28,501 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 16:42:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:42:28,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:28,504 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 16:42:28,504 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 16:42:28,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:42:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 16:42:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 16:42:28,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 16:42:28,518 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 16:42:28,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:28,518 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 16:42:28,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:28,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 16:42:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:28,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:28,519 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:28,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:28,721 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:28,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1288275347, now seen corresponding path program 33 times [2021-06-05 16:42:28,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:28,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266464509] [2021-06-05 16:42:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:28,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:28,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266464509] [2021-06-05 16:42:28,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266464509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:28,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689501550] [2021-06-05 16:42:28,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:28,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:42:28,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:28,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:28,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689501550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:28,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:28,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:42:28,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24467029] [2021-06-05 16:42:28,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:28,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:28,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:28,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:28,858 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:29,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:29,180 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 16:42:29,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:42:29,180 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:29,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:29,183 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 16:42:29,183 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 16:42:29,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:42:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 16:42:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 16:42:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:29,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 16:42:29,201 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 16:42:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:29,201 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 16:42:29,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 16:42:29,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:29,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:29,203 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:29,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 16:42:29,425 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:29,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1951314555, now seen corresponding path program 34 times [2021-06-05 16:42:29,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:29,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216295492] [2021-06-05 16:42:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:29,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:29,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216295492] [2021-06-05 16:42:29,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216295492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:29,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561699429] [2021-06-05 16:42:29,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:29,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:42:29,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:29,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:29,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:29,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561699429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:29,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:29,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:42:29,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496571745] [2021-06-05 16:42:29,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:29,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:29,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:29,590 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:29,868 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 16:42:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:42:29,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:29,870 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 16:42:29,870 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 16:42:29,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:42:29,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 16:42:29,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 16:42:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 16:42:29,887 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 16:42:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:29,887 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 16:42:29,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 16:42:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:42:29,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:29,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:30,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:30,090 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:30,090 INFO L82 PathProgramCache]: Analyzing trace with hash -860517803, now seen corresponding path program 35 times [2021-06-05 16:42:30,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:30,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432013861] [2021-06-05 16:42:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:30,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:30,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432013861] [2021-06-05 16:42:30,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432013861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:30,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831095115] [2021-06-05 16:42:30,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:30,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:42:30,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:30,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:30,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:30,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831095115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:30,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:30,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:42:30,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518798081] [2021-06-05 16:42:30,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:42:30,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:30,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:42:30,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:42:30,224 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:30,431 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 16:42:30,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:42:30,431 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:42:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:30,433 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 16:42:30,433 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 16:42:30,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:42:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 16:42:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 16:42:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 16:42:30,449 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 16:42:30,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:30,449 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 16:42:30,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 16:42:30,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:42:30,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:30,451 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:30,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:30,664 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:30,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1270661831, now seen corresponding path program 4 times [2021-06-05 16:42:30,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:30,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882376220] [2021-06-05 16:42:30,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:31,208 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-05 16:42:31,421 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 16:42:31,620 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-06-05 16:42:31,867 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 16:42:32,013 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 16:42:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:32,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:32,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882376220] [2021-06-05 16:42:32,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882376220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:32,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532035573] [2021-06-05 16:42:32,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:32,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:42:32,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:32,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:42:32,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:32,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:42:32,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:42:32,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:42:32,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:42:32,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:42:32,684 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:42:32,694 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:42:32,700 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:42:32,707 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:42:32,716 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:42:32,726 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:42:32,734 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:42:32,741 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:42:32,756 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:42:32,767 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:42:32,776 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:32,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:32,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:42:32,785 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,853 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 16:42:32,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:42:32,854 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 16:42:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:32,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532035573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:32,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:32,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:42:32,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143590225] [2021-06-05 16:42:32,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:42:32,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:32,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:42:32,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:42:32,909 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:33,287 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-06-05 16:42:33,785 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 16:42:33,955 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 16:42:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:34,207 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 16:42:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:42:34,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:42:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:34,211 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 16:42:34,211 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 16:42:34,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2204.4ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:42:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 16:42:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 16:42:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 16:42:34,234 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 16:42:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:34,234 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 16:42:34,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 16:42:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:42:34,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:34,236 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:34,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:34,453 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:34,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:34,453 INFO L82 PathProgramCache]: Analyzing trace with hash -757736185, now seen corresponding path program 5 times [2021-06-05 16:42:34,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:34,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310399794] [2021-06-05 16:42:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:34,745 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-05 16:42:34,881 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 16:42:35,015 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 16:42:35,152 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 16:42:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:35,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:35,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310399794] [2021-06-05 16:42:35,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310399794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:35,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903768524] [2021-06-05 16:42:35,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:35,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:42:35,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:35,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:42:35,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:35,880 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 16:42:35,944 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_5], 3=[v_prenex_9, v_prenex_7]} [2021-06-05 16:42:35,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:35,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:35,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:35,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:42:35,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:35,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:35,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:35,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:42:35,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:36,106 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 16:42:36,107 INFO L628 ElimStorePlain]: treesize reduction 73, result has 74.2 percent of original size [2021-06-05 16:42:36,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:36,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:36,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:42:36,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:36,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:36,172 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 16:42:36,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 54 [2021-06-05 16:42:36,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:36,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:36,225 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 16:42:36,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 42 [2021-06-05 16:42:36,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:36,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:36,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:42:36,267 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:322, output treesize:59 [2021-06-05 16:42:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:36,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903768524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:36,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:36,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:42:36,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58142802] [2021-06-05 16:42:36,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:42:36,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:36,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:42:36,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:42:36,369 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:36,822 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 62 [2021-06-05 16:42:37,065 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-05 16:42:37,309 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-05 16:42:37,519 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 16:42:37,668 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 16:42:37,854 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-06-05 16:42:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:38,259 INFO L93 Difference]: Finished difference Result 1563 states and 5076 transitions. [2021-06-05 16:42:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:42:38,260 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:42:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:38,261 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 16:42:38,261 INFO L226 Difference]: Without dead ends: 1533 [2021-06-05 16:42:38,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2591.9ms TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:42:38,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-06-05 16:42:38,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1150. [2021-06-05 16:42:38,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 16:42:38,277 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 16:42:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:38,277 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 16:42:38,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 16:42:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:42:38,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:38,279 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:38,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:38,499 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:38,500 INFO L82 PathProgramCache]: Analyzing trace with hash 833693123, now seen corresponding path program 36 times [2021-06-05 16:42:38,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:38,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720335279] [2021-06-05 16:42:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:38,912 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-05 16:42:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:39,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:39,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720335279] [2021-06-05 16:42:39,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720335279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:39,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359440982] [2021-06-05 16:42:39,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:39,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:42:39,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:39,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:42:39,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:39,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 16:42:39,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:39,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 16:42:39,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:39,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:42:39,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 16:42:39,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:39,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 16:42:39,959 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:39,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 16:42:39,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:42:39,981 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:39,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:39,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:39,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:42:39,992 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:40,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:42:40,011 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:40,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 16:42:40,022 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:40,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:42:40,033 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:40,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 16:42:40,044 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:40,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 16:42:40,056 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:40,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 16:42:40,067 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:40,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:42:40,078 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:40,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:40,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:40,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 16:42:40,085 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:40,109 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-06-05 16:42:40,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:42:40,111 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-06-05 16:42:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:40,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359440982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:40,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:40,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:42:40,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498292243] [2021-06-05 16:42:40,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:42:40,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:40,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:42:40,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:42:40,141 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:40,641 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-06-05 16:42:40,880 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-06-05 16:42:41,591 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-06-05 16:42:41,758 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2021-06-05 16:42:41,926 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-06-05 16:42:42,261 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-05 16:42:42,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:42,343 INFO L93 Difference]: Finished difference Result 1615 states and 5216 transitions. [2021-06-05 16:42:42,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:42:42,343 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:42:42,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:42,346 INFO L225 Difference]: With dead ends: 1615 [2021-06-05 16:42:42,346 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 16:42:42,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2469.8ms TimeCoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:42:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 16:42:42,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1180. [2021-06-05 16:42:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:42,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 16:42:42,362 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 16:42:42,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:42,362 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 16:42:42,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:42,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 16:42:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:42:42,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:42,365 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:42,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 16:42:42,566 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:42,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:42,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1638740299, now seen corresponding path program 6 times [2021-06-05 16:42:42,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:42,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608501201] [2021-06-05 16:42:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:43,093 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 16:42:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:43,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:43,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608501201] [2021-06-05 16:42:43,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608501201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:43,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367301896] [2021-06-05 16:42:43,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:43,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:42:43,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:43,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:42:43,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:43,790 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 16:42:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:43,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:43,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:42:43,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:44,027 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:42:44,028 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.6 percent of original size [2021-06-05 16:42:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:44,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:44,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:44,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:42:44,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:44,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:44,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:42:44,044 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:44,156 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 16:42:44,157 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.8 percent of original size [2021-06-05 16:42:44,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:44,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:44,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:42:44,165 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:44,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:44,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:44,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:44,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:42:44,223 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:44,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:44,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:42:44,275 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-05 16:42:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:44,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367301896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:44,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:44,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:42:44,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951608088] [2021-06-05 16:42:44,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:42:44,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:44,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:42:44,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:42:44,371 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:44,618 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-06-05 16:42:45,259 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 16:42:45,423 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 16:42:45,749 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 16:42:45,917 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-05 16:42:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:46,001 INFO L93 Difference]: Finished difference Result 1620 states and 5225 transitions. [2021-06-05 16:42:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:42:46,002 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:42:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:46,004 INFO L225 Difference]: With dead ends: 1620 [2021-06-05 16:42:46,004 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 16:42:46,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2299.1ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:42:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 16:42:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1189. [2021-06-05 16:42:46,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-06-05 16:42:46,018 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-06-05 16:42:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:46,018 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-06-05 16:42:46,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-06-05 16:42:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:42:46,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:46,020 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:46,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:46,221 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1105845433, now seen corresponding path program 37 times [2021-06-05 16:42:46,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:46,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506869192] [2021-06-05 16:42:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:46,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:46,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506869192] [2021-06-05 16:42:46,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506869192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:46,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073125093] [2021-06-05 16:42:46,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:46,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:42:46,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:47,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 16:42:47,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 16:42:47,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 16:42:47,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:42:47,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 16:42:47,540 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:42:47,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 16:42:47,564 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 16:42:47,576 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:42:47,587 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:42:47,607 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 16:42:47,616 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:42:47,625 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 16:42:47,635 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 16:42:47,644 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 16:42:47,651 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:47,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:47,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:42:47,657 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:47,695 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-06-05 16:42:47,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:42:47,697 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-06-05 16:42:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:47,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073125093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:47,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:47,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:42:47,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172572887] [2021-06-05 16:42:47,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:42:47,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:47,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:42:47,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:42:47,733 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:48,224 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-06-05 16:42:48,778 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 58 [2021-06-05 16:42:49,091 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-06-05 16:42:49,836 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 16:42:49,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:49,962 INFO L93 Difference]: Finished difference Result 1800 states and 5747 transitions. [2021-06-05 16:42:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:42:49,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:42:49,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:49,965 INFO L225 Difference]: With dead ends: 1800 [2021-06-05 16:42:49,965 INFO L226 Difference]: Without dead ends: 1785 [2021-06-05 16:42:49,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2378.2ms TimeCoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:42:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-06-05 16:42:49,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1201. [2021-06-05 16:42:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-06-05 16:42:49,981 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-06-05 16:42:49,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:49,981 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-06-05 16:42:49,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:49,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-06-05 16:42:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:42:49,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:49,984 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:50,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 16:42:50,206 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:50,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:50,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2082164277, now seen corresponding path program 38 times [2021-06-05 16:42:50,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:50,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227677636] [2021-06-05 16:42:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:50,673 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 16:42:50,798 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-05 16:42:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:50,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:50,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227677636] [2021-06-05 16:42:50,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227677636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:50,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105333160] [2021-06-05 16:42:50,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:51,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:51,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:51,012 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:42:51,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:51,541 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-05 16:42:51,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 51 [2021-06-05 16:42:51,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:51,584 INFO L354 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2021-06-05 16:42:51,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 37 [2021-06-05 16:42:51,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:51,663 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 16:42:51,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 59 [2021-06-05 16:42:51,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:51,733 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 16:42:51,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 16:42:51,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:51,795 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-06-05 16:42:51,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 41 [2021-06-05 16:42:51,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:51,856 INFO L354 Elim1Store]: treesize reduction 19, result has 59.6 percent of original size [2021-06-05 16:42:51,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 45 [2021-06-05 16:42:51,863 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:51,920 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 16:42:51,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-05 16:42:51,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:52,001 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 16:42:52,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 68 [2021-06-05 16:42:52,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:52,102 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-06-05 16:42:52,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 34 [2021-06-05 16:42:52,104 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:52,159 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-05 16:42:52,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 52 [2021-06-05 16:42:52,163 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:52,187 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 16:42:52,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 16:42:52,188 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:52,215 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 16:42:52,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:42:52,216 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:52,264 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-06-05 16:42:52,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 46 [2021-06-05 16:42:52,283 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:52,327 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-06-05 16:42:52,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 33 [2021-06-05 16:42:52,329 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:52,354 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-05 16:42:52,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:42:52,354 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:52,398 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 16:42:52,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-05 16:42:52,418 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:53,109 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 83 [2021-06-05 16:42:53,110 INFO L628 ElimStorePlain]: treesize reduction 404, result has 50.1 percent of original size [2021-06-05 16:42:53,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:42:53,131 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1105, output treesize:406 [2021-06-05 16:42:53,365 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:42:53,586 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 16:42:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:53,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105333160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:53,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:53,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:42:53,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958733319] [2021-06-05 16:42:53,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:42:53,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:53,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:42:53,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:42:53,694 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:54,254 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 16:42:54,862 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 16:42:55,124 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 16:42:55,550 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-05 16:42:56,368 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 65 [2021-06-05 16:42:56,521 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 16:42:56,815 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2021-06-05 16:42:57,329 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-06-05 16:42:57,810 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2021-06-05 16:42:58,165 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2021-06-05 16:42:58,434 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-05 16:42:58,988 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 114 [2021-06-05 16:42:59,658 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 107 [2021-06-05 16:43:00,171 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 113 [2021-06-05 16:43:00,736 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 97 [2021-06-05 16:43:01,413 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 105 [2021-06-05 16:43:01,618 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 16:43:01,839 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 16:43:02,051 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 16:43:02,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:02,187 INFO L93 Difference]: Finished difference Result 2410 states and 7510 transitions. [2021-06-05 16:43:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 16:43:02,188 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:43:02,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:02,191 INFO L225 Difference]: With dead ends: 2410 [2021-06-05 16:43:02,191 INFO L226 Difference]: Without dead ends: 2365 [2021-06-05 16:43:02,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 8801.9ms TimeCoverageRelationStatistics Valid=726, Invalid=3966, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:43:02,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-06-05 16:43:02,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1341. [2021-06-05 16:43:02,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3007462686567166) internal successors, (4423), 1340 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4423 transitions. [2021-06-05 16:43:02,213 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4423 transitions. Word has length 26 [2021-06-05 16:43:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:02,213 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4423 transitions. [2021-06-05 16:43:02,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:02,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4423 transitions. [2021-06-05 16:43:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:43:02,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:02,215 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:02,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:02,416 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash 127735791, now seen corresponding path program 7 times [2021-06-05 16:43:02,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:02,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722574511] [2021-06-05 16:43:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:02,786 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-05 16:43:02,982 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 16:43:03,171 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 16:43:03,356 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 16:43:03,501 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 16:43:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:03,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:03,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722574511] [2021-06-05 16:43:03,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722574511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:03,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795866521] [2021-06-05 16:43:03,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:03,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:43:03,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:04,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:43:04,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:43:04,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:43:04,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:43:04,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:43:04,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:43:04,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:43:04,120 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:43:04,127 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:43:04,142 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:43:04,149 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:43:04,158 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:43:04,167 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:43:04,174 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:43:04,180 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:43:04,186 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:43:04,191 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,266 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 16:43:04,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:43:04,268 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 16:43:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:04,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795866521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:04,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:04,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:43:04,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736347692] [2021-06-05 16:43:04,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:43:04,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:04,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:43:04,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:43:04,316 INFO L87 Difference]: Start difference. First operand 1341 states and 4423 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:05,046 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-06-05 16:43:05,303 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 16:43:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:05,646 INFO L93 Difference]: Finished difference Result 1736 states and 5612 transitions. [2021-06-05 16:43:05,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:43:05,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:43:05,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:05,649 INFO L225 Difference]: With dead ends: 1736 [2021-06-05 16:43:05,649 INFO L226 Difference]: Without dead ends: 1721 [2021-06-05 16:43:05,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2090.5ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:43:05,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-06-05 16:43:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1352. [2021-06-05 16:43:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.298297557364915) internal successors, (4456), 1351 states have internal predecessors, (4456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4456 transitions. [2021-06-05 16:43:05,669 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4456 transitions. Word has length 26 [2021-06-05 16:43:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:05,669 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4456 transitions. [2021-06-05 16:43:05,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4456 transitions. [2021-06-05 16:43:05,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:43:05,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:05,672 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:05,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 16:43:05,889 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:05,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1900662225, now seen corresponding path program 8 times [2021-06-05 16:43:05,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:05,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936801819] [2021-06-05 16:43:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:06,141 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-05 16:43:06,302 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 16:43:06,446 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 16:43:06,580 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 16:43:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:06,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:06,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936801819] [2021-06-05 16:43:06,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936801819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:06,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231680989] [2021-06-05 16:43:06,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:06,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:43:06,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:06,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:43:06,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:07,097 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 16:43:07,231 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:43:07,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-06-05 16:43:07,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:07,411 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2021-06-05 16:43:07,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:07,436 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:43:07,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 75 [2021-06-05 16:43:07,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:07,616 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-05 16:43:07,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:07,639 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:43:07,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 71 [2021-06-05 16:43:07,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:07,810 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 16:43:07,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:07,843 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:43:07,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 49 [2021-06-05 16:43:07,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:08,017 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 16:43:08,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:08,040 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:43:08,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 16:43:08,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:08,212 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 16:43:08,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:08,238 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:43:08,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 57 [2021-06-05 16:43:08,243 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:08,554 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 127 [2021-06-05 16:43:08,554 INFO L628 ElimStorePlain]: treesize reduction 16, result has 96.2 percent of original size [2021-06-05 16:43:08,574 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:43:08,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 16:43:08,577 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:08,865 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-05 16:43:08,865 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-06-05 16:43:08,886 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:43:08,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-06-05 16:43:08,887 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:09,026 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 16:43:09,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:09,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:43:09,058 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:743, output treesize:480 [2021-06-05 16:43:09,380 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 16:43:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:09,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231680989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:09,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:09,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:43:09,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56240448] [2021-06-05 16:43:09,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:43:09,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:09,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:43:09,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:43:09,591 INFO L87 Difference]: Start difference. First operand 1352 states and 4456 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:10,432 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 16:43:10,909 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-05 16:43:11,073 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 16:43:11,280 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2021-06-05 16:43:11,641 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2021-06-05 16:43:11,816 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-05 16:43:12,021 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-06-05 16:43:12,170 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 16:43:12,471 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 16:43:12,664 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 16:43:12,962 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-05 16:43:13,462 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-06-05 16:43:13,919 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2021-06-05 16:43:14,380 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-06-05 16:43:14,912 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-05 16:43:15,202 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 16:43:15,463 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-06-05 16:43:15,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:15,543 INFO L93 Difference]: Finished difference Result 2040 states and 6414 transitions. [2021-06-05 16:43:15,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:43:15,543 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:43:15,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:15,546 INFO L225 Difference]: With dead ends: 2040 [2021-06-05 16:43:15,546 INFO L226 Difference]: Without dead ends: 2025 [2021-06-05 16:43:15,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 6598.2ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:43:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-06-05 16:43:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1363. [2021-06-05 16:43:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.3069016152716593) internal successors, (4504), 1362 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4504 transitions. [2021-06-05 16:43:15,566 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4504 transitions. Word has length 26 [2021-06-05 16:43:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:15,567 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4504 transitions. [2021-06-05 16:43:15,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4504 transitions. [2021-06-05 16:43:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:43:15,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:15,568 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:15,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 16:43:15,769 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash 456895363, now seen corresponding path program 9 times [2021-06-05 16:43:15,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:15,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578986769] [2021-06-05 16:43:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:16,075 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-05 16:43:16,192 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-06-05 16:43:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:16,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:16,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578986769] [2021-06-05 16:43:16,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578986769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:16,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899904981] [2021-06-05 16:43:16,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:16,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:43:16,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:16,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:43:16,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:17,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:17,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:43:17,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:17,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:17,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:17,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:43:17,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:17,479 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 16:43:17,479 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-06-05 16:43:17,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:17,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:17,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:43:17,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:17,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:17,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:17,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:17,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:43:17,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:17,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:17,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:17,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:17,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:43:17,659 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:17,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:17,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:17,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:43:17,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:17,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:17,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:43:17,727 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-06-05 16:43:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:17,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899904981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:17,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:17,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:43:17,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372630441] [2021-06-05 16:43:17,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:43:17,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:17,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:43:17,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:43:17,798 INFO L87 Difference]: Start difference. First operand 1363 states and 4504 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:18,021 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-06-05 16:43:18,744 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2021-06-05 16:43:18,979 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-06-05 16:43:19,283 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 62 [2021-06-05 16:43:19,668 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-06-05 16:43:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:19,826 INFO L93 Difference]: Finished difference Result 1593 states and 5152 transitions. [2021-06-05 16:43:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:43:19,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:43:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:19,828 INFO L225 Difference]: With dead ends: 1593 [2021-06-05 16:43:19,829 INFO L226 Difference]: Without dead ends: 1578 [2021-06-05 16:43:19,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2499.1ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:43:19,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-06-05 16:43:19,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1372. [2021-06-05 16:43:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-06-05 16:43:19,845 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-06-05 16:43:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:19,845 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-06-05 16:43:19,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-06-05 16:43:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:43:19,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:19,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:20,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:20,047 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:20,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:20,047 INFO L82 PathProgramCache]: Analyzing trace with hash 289086271, now seen corresponding path program 10 times [2021-06-05 16:43:20,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:20,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218065464] [2021-06-05 16:43:20,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:20,473 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2021-06-05 16:43:20,685 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 16:43:20,840 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 16:43:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:21,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:21,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218065464] [2021-06-05 16:43:21,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218065464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:21,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517081188] [2021-06-05 16:43:21,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:21,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:43:21,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:21,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:43:21,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:21,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:43:21,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:43:21,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:43:21,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:43:21,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:43:21,545 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:43:21,553 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:43:21,561 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:43:21,568 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:43:21,577 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:43:21,584 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:43:21,591 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:43:21,598 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:43:21,616 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:43:21,622 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:43:21,628 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:21,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:21,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:43:21,634 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:21,700 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 16:43:21,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:43:21,701 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 16:43:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:21,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517081188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:21,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:21,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:43:21,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417693457] [2021-06-05 16:43:21,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:43:21,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:21,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:43:21,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:43:21,755 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:22,171 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-05 16:43:22,439 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-05 16:43:22,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:22,699 INFO L93 Difference]: Finished difference Result 1674 states and 5467 transitions. [2021-06-05 16:43:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:43:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:43:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:22,701 INFO L225 Difference]: With dead ends: 1674 [2021-06-05 16:43:22,701 INFO L226 Difference]: Without dead ends: 1659 [2021-06-05 16:43:22,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1708.8ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:43:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-06-05 16:43:22,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1372. [2021-06-05 16:43:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-06-05 16:43:22,717 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-06-05 16:43:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:22,717 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-06-05 16:43:22,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-06-05 16:43:22,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:43:22,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:22,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:22,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 16:43:22,920 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:22,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:22,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1778429757, now seen corresponding path program 11 times [2021-06-05 16:43:22,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:22,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130735620] [2021-06-05 16:43:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:23,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:23,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130735620] [2021-06-05 16:43:23,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130735620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:23,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412545335] [2021-06-05 16:43:23,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:23,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:43:23,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:23,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:43:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:24,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:24,092 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:43:24,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 29 [2021-06-05 16:43:24,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:24,116 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:43:24,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:43:24,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:24,309 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 16:43:24,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:24,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:24,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-06-05 16:43:24,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:24,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:24,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:24,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 16:43:24,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:24,549 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 16:43:24,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:24,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:24,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:24,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 16:43:24,573 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:24,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:24,593 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:43:24,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:43:24,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:24,766 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:43:24,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:24,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:24,788 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:43:24,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:43:24,790 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:24,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:24,810 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:43:24,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:43:24,812 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:24,973 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:43:24,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:24,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:43:24,999 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:401, output treesize:389 [2021-06-05 16:43:25,200 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 16:43:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:25,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412545335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:25,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:25,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:43:25,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151404041] [2021-06-05 16:43:25,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:43:25,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:25,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:43:25,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:43:25,291 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:25,759 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-06-05 16:43:25,923 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 48 [2021-06-05 16:43:26,270 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 16:43:26,889 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-06-05 16:43:27,262 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2021-06-05 16:43:27,411 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-05 16:43:27,791 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 85 [2021-06-05 16:43:27,990 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-05 16:43:28,332 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2021-06-05 16:43:28,816 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2021-06-05 16:43:29,146 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-06-05 16:43:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:29,253 INFO L93 Difference]: Finished difference Result 2311 states and 7396 transitions. [2021-06-05 16:43:29,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:43:29,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:43:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:29,256 INFO L225 Difference]: With dead ends: 2311 [2021-06-05 16:43:29,257 INFO L226 Difference]: Without dead ends: 2281 [2021-06-05 16:43:29,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4226.6ms TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:43:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-06-05 16:43:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1375. [2021-06-05 16:43:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.3151382823871907) internal successors, (4555), 1374 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4555 transitions. [2021-06-05 16:43:29,278 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4555 transitions. Word has length 26 [2021-06-05 16:43:29,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:29,278 INFO L482 AbstractCegarLoop]: Abstraction has 1375 states and 4555 transitions. [2021-06-05 16:43:29,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:29,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4555 transitions. [2021-06-05 16:43:29,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:43:29,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:29,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:29,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:29,481 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:29,481 INFO L82 PathProgramCache]: Analyzing trace with hash -746246473, now seen corresponding path program 12 times [2021-06-05 16:43:29,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:29,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926888901] [2021-06-05 16:43:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:29,806 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2021-06-05 16:43:29,950 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 16:43:30,083 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-06-05 16:43:30,211 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-06-05 16:43:30,337 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-05 16:43:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:30,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:30,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926888901] [2021-06-05 16:43:30,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926888901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:30,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345445817] [2021-06-05 16:43:30,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:30,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:43:30,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:30,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:43:30,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:30,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,719 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:43:30,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 16:43:30,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:30,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-06-05 16:43:30,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,753 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:43:30,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2021-06-05 16:43:30,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,766 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:43:30,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-06-05 16:43:30,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,779 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:43:30,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 16:43:30,780 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,793 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:43:30,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:43:30,794 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,806 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:43:30,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 16:43:30,807 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,822 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:43:30,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:43:30,823 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,837 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:43:30,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 16:43:30,837 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,851 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:43:30,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 16:43:30,852 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,863 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:43:30,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 16:43:30,864 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,877 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:43:30,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:43:30,879 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:30,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-06-05 16:43:30,895 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,909 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:43:30,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2021-06-05 16:43:30,910 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,921 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:43:30,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:43:30,922 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:30,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:30,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:30,930 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:43:30,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:43:30,931 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:31,007 INFO L628 ElimStorePlain]: treesize reduction 49, result has 63.7 percent of original size [2021-06-05 16:43:31,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:43:31,008 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-06-05 16:43:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:31,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345445817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:31,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:31,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:43:31,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448254653] [2021-06-05 16:43:31,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:43:31,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:31,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:43:31,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:43:31,143 INFO L87 Difference]: Start difference. First operand 1375 states and 4555 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:31,394 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 38 [2021-06-05 16:43:31,863 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-06-05 16:43:32,103 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-06-05 16:43:32,321 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-06-05 16:43:32,452 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-06-05 16:43:32,639 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2021-06-05 16:43:32,897 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-05 16:43:33,079 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-05 16:43:33,275 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-06-05 16:43:33,414 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-05 16:43:33,670 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-06-05 16:43:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:33,780 INFO L93 Difference]: Finished difference Result 1790 states and 5831 transitions. [2021-06-05 16:43:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:43:33,780 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:43:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:33,783 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 16:43:33,783 INFO L226 Difference]: Without dead ends: 1775 [2021-06-05 16:43:33,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3091.7ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:43:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-06-05 16:43:33,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1378. [2021-06-05 16:43:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.316630355846042) internal successors, (4567), 1377 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4567 transitions. [2021-06-05 16:43:33,800 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4567 transitions. Word has length 26 [2021-06-05 16:43:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:33,800 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4567 transitions. [2021-06-05 16:43:33,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:33,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4567 transitions. [2021-06-05 16:43:33,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:43:33,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:33,802 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:34,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 16:43:34,002 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:34,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:34,003 INFO L82 PathProgramCache]: Analyzing trace with hash 148423883, now seen corresponding path program 13 times [2021-06-05 16:43:34,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:34,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463619565] [2021-06-05 16:43:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:34,249 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-06-05 16:43:34,369 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-05 16:43:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:34,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:34,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463619565] [2021-06-05 16:43:34,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463619565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:34,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874448885] [2021-06-05 16:43:34,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:34,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:43:34,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:35,147 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 16:43:35,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:35,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:35,223 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:43:35,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-05 16:43:35,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:35,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:35,242 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:43:35,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 57 [2021-06-05 16:43:35,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:35,411 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-06-05 16:43:35,418 INFO L628 ElimStorePlain]: treesize reduction 211, result has 55.7 percent of original size [2021-06-05 16:43:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:35,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-05 16:43:35,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:35,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:35,446 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:43:35,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 50 [2021-06-05 16:43:35,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:35,548 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 16:43:35,549 INFO L628 ElimStorePlain]: treesize reduction 19, result has 90.4 percent of original size [2021-06-05 16:43:35,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:35,558 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:43:35,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 30 [2021-06-05 16:43:35,560 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:35,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:35,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:35,619 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:43:35,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 53 [2021-06-05 16:43:35,621 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:35,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:35,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:43:35,658 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:619, output treesize:64 [2021-06-05 16:43:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:35,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874448885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:35,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:35,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:43:35,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958463943] [2021-06-05 16:43:35,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:43:35,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:35,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:43:35,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:43:35,731 INFO L87 Difference]: Start difference. First operand 1378 states and 4567 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:36,046 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-05 16:43:36,544 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-06-05 16:43:37,037 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-06-05 16:43:37,271 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-05 16:43:37,570 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 16:43:37,788 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 16:43:37,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:37,959 INFO L93 Difference]: Finished difference Result 2164 states and 6833 transitions. [2021-06-05 16:43:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:43:37,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:43:37,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:37,963 INFO L225 Difference]: With dead ends: 2164 [2021-06-05 16:43:37,963 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 16:43:37,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2602.6ms TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:43:37,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 16:43:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1380. [2021-06-05 16:43:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-05 16:43:37,984 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-05 16:43:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:37,984 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-05 16:43:37,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-05 16:43:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:43:37,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:37,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:38,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-05 16:43:38,188 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:38,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:38,188 INFO L82 PathProgramCache]: Analyzing trace with hash -806418041, now seen corresponding path program 39 times [2021-06-05 16:43:38,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:38,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606786073] [2021-06-05 16:43:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:38,396 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-05 16:43:38,654 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-05 16:43:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:38,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:38,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606786073] [2021-06-05 16:43:38,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606786073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:38,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373796810] [2021-06-05 16:43:38,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:38,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:43:38,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:38,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:43:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:39,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 20 [2021-06-05 16:43:39,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-06-05 16:43:39,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2021-06-05 16:43:39,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 24 [2021-06-05 16:43:39,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-06-05 16:43:39,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 18 [2021-06-05 16:43:39,403 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:43:39,420 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 12 [2021-06-05 16:43:39,435 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18 [2021-06-05 16:43:39,453 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2021-06-05 16:43:39,471 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 28 [2021-06-05 16:43:39,484 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 14 [2021-06-05 16:43:39,498 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 24 [2021-06-05 16:43:39,510 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2021-06-05 16:43:39,522 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 24 [2021-06-05 16:43:39,533 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:39,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:39,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 28 [2021-06-05 16:43:39,541 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:39,634 INFO L628 ElimStorePlain]: treesize reduction 50, result has 49.5 percent of original size [2021-06-05 16:43:39,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:43:39,636 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1097, output treesize:49 [2021-06-05 16:43:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:39,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373796810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:39,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:39,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 16:43:39,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555344969] [2021-06-05 16:43:39,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:43:39,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:39,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:43:39,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:43:39,754 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:40,260 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-06-05 16:43:40,685 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2021-06-05 16:43:41,174 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-06-05 16:43:41,887 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-06-05 16:43:43,034 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-06-05 16:43:43,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:43,456 INFO L93 Difference]: Finished difference Result 3078 states and 9474 transitions. [2021-06-05 16:43:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:43:43,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:43:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:43,461 INFO L225 Difference]: With dead ends: 3078 [2021-06-05 16:43:43,461 INFO L226 Difference]: Without dead ends: 2991 [2021-06-05 16:43:43,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 3827.0ms TimeCoverageRelationStatistics Valid=542, Invalid=2764, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:43:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-05 16:43:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1413. [2021-06-05 16:43:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3208215297450425) internal successors, (4689), 1412 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4689 transitions. [2021-06-05 16:43:43,484 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4689 transitions. Word has length 26 [2021-06-05 16:43:43,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:43,484 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4689 transitions. [2021-06-05 16:43:43,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4689 transitions. [2021-06-05 16:43:43,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:43:43,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:43,486 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:43,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:43,686 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:43,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:43,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1738294259, now seen corresponding path program 14 times [2021-06-05 16:43:43,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:43,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487560157] [2021-06-05 16:43:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:44,098 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-05 16:43:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:44,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:44,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487560157] [2021-06-05 16:43:44,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487560157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:44,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394742451] [2021-06-05 16:43:44,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:44,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:43:44,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:44,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:43:44,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:44,771 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 16:43:45,162 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2021-06-05 16:43:45,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:45,480 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 16:43:45,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 89 [2021-06-05 16:43:45,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:45,506 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-06-05 16:43:45,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 1 [2021-06-05 16:43:45,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:46,078 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 197 [2021-06-05 16:43:46,078 INFO L628 ElimStorePlain]: treesize reduction 788, result has 46.3 percent of original size [2021-06-05 16:43:46,104 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:43:46,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 52 [2021-06-05 16:43:46,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:46,276 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2021-06-05 16:43:46,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:46,311 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 16:43:46,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 69 [2021-06-05 16:43:46,314 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:46,485 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-05 16:43:46,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:46,510 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:43:46,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 62 [2021-06-05 16:43:46,512 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:46,702 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 16:43:46,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:46,723 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:43:46,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 55 [2021-06-05 16:43:46,725 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:46,899 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 16:43:46,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:46,924 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:43:46,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 60 [2021-06-05 16:43:46,928 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:47,095 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 16:43:47,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:47,126 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 16:43:47,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 72 [2021-06-05 16:43:47,128 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:47,289 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:43:47,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:47,319 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 16:43:47,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 77 [2021-06-05 16:43:47,321 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:47,476 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 16:43:47,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:47,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:43:47,499 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1661, output treesize:498 [2021-06-05 16:43:47,752 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-05 16:43:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:47,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394742451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:47,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:47,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:43:47,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122933272] [2021-06-05 16:43:47,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:43:47,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:47,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:43:47,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:43:47,849 INFO L87 Difference]: Start difference. First operand 1413 states and 4689 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:48,490 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:43:48,685 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 16:43:48,851 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-05 16:43:49,154 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-05 16:43:49,411 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-05 16:43:49,590 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2021-06-05 16:43:49,824 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-05 16:43:50,176 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 76 [2021-06-05 16:43:50,835 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-05 16:43:52,608 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 277 DAG size of output: 259 [2021-06-05 16:43:53,306 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 113 [2021-06-05 16:43:53,863 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-06-05 16:43:54,597 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 112 [2021-06-05 16:43:56,463 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 274 DAG size of output: 258 [2021-06-05 16:43:58,696 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 303 DAG size of output: 279 [2021-06-05 16:43:59,331 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-06-05 16:43:59,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:59,921 INFO L93 Difference]: Finished difference Result 2106 states and 6748 transitions. [2021-06-05 16:43:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:43:59,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:43:59,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:59,924 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 16:43:59,924 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 16:43:59,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 11702.0ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:43:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 16:43:59,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1409. [2021-06-05 16:43:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-06-05 16:43:59,943 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-06-05 16:43:59,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:59,944 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-06-05 16:43:59,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:59,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-06-05 16:43:59,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:43:59,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:59,946 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:00,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable609 [2021-06-05 16:44:00,146 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:00,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:00,147 INFO L82 PathProgramCache]: Analyzing trace with hash 120761479, now seen corresponding path program 15 times [2021-06-05 16:44:00,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:00,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460105704] [2021-06-05 16:44:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:00,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:00,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460105704] [2021-06-05 16:44:00,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460105704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:00,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575139181] [2021-06-05 16:44:00,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:00,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:44:00,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:00,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:44:00,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:01,055 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 16:44:01,147 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_80, v_prenex_87, v_prenex_85, v_prenex_78], 6=[v_prenex_83, A, v_prenex_76, v_prenex_89]} [2021-06-05 16:44:01,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:01,170 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:44:01,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:44:01,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:01,539 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 153 [2021-06-05 16:44:01,540 INFO L628 ElimStorePlain]: treesize reduction 413, result has 53.5 percent of original size [2021-06-05 16:44:01,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:01,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:01,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:44:01,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:01,702 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 16:44:01,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:01,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:01,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:01,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:44:01,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:01,870 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 16:44:01,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:01,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:01,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:01,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:44:01,888 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:02,023 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 16:44:02,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:02,040 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:44:02,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-06-05 16:44:02,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:02,173 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 16:44:02,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:02,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:02,195 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-05 16:44:02,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-05 16:44:02,196 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:02,321 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:44:02,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:02,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:02,343 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:44:02,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-06-05 16:44:02,345 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:02,464 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:44:02,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:02,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:02,477 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 16:44:02,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 31 [2021-06-05 16:44:02,479 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:02,591 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:44:02,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:02,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:44:02,601 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:903, output treesize:216 [2021-06-05 16:44:02,761 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-06-05 16:44:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:02,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575139181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:02,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:02,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:44:02,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44132791] [2021-06-05 16:44:02,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:44:02,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:44:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:44:02,846 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:03,250 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-05 16:44:03,541 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 16:44:03,692 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-06-05 16:44:04,592 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2021-06-05 16:44:04,935 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 16:44:05,130 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-06-05 16:44:05,880 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 79 [2021-06-05 16:44:06,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:06,321 INFO L93 Difference]: Finished difference Result 2320 states and 7312 transitions. [2021-06-05 16:44:06,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:44:06,322 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:06,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:06,326 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 16:44:06,326 INFO L226 Difference]: Without dead ends: 2305 [2021-06-05 16:44:06,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3634.8ms TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:44:06,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-05 16:44:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1409. [2021-06-05 16:44:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-06-05 16:44:06,354 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-06-05 16:44:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:06,354 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-06-05 16:44:06,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-06-05 16:44:06,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:06,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:06,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:06,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-05 16:44:06,557 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:06,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:06,557 INFO L82 PathProgramCache]: Analyzing trace with hash 395894327, now seen corresponding path program 40 times [2021-06-05 16:44:06,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:06,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380334080] [2021-06-05 16:44:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:06,756 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-06-05 16:44:06,886 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-06-05 16:44:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:07,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:07,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380334080] [2021-06-05 16:44:07,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380334080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:07,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271568468] [2021-06-05 16:44:07,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:07,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:44:07,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:07,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:44:07,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:08,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-06-05 16:44:08,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-06-05 16:44:08,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:44:08,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 16:44:08,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-06-05 16:44:08,125 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-06-05 16:44:08,138 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 16:44:08,151 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-06-05 16:44:08,165 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-05 16:44:08,176 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-06-05 16:44:08,186 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-06-05 16:44:08,197 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-06-05 16:44:08,207 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:44:08,217 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-06-05 16:44:08,227 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 16:44:08,236 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:08,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 16:44:08,243 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,327 INFO L628 ElimStorePlain]: treesize reduction 347, result has 11.5 percent of original size [2021-06-05 16:44:08,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:44:08,328 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:39 [2021-06-05 16:44:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:08,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271568468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:08,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:08,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 16:44:08,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562875978] [2021-06-05 16:44:08,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:44:08,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:08,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:44:08,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:44:08,374 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:08,810 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 16:44:09,032 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 16:44:09,440 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-05 16:44:09,636 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-06-05 16:44:10,231 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-06-05 16:44:10,423 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-06-05 16:44:10,841 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-06-05 16:44:11,206 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-06-05 16:44:11,702 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-05 16:44:11,872 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-06-05 16:44:12,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:12,273 INFO L93 Difference]: Finished difference Result 2743 states and 8648 transitions. [2021-06-05 16:44:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:44:12,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:12,277 INFO L225 Difference]: With dead ends: 2743 [2021-06-05 16:44:12,277 INFO L226 Difference]: Without dead ends: 2698 [2021-06-05 16:44:12,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 4047.1ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:44:12,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-06-05 16:44:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 1412. [2021-06-05 16:44:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.3217576187101345) internal successors, (4687), 1411 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:12,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4687 transitions. [2021-06-05 16:44:12,297 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4687 transitions. Word has length 26 [2021-06-05 16:44:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:12,298 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4687 transitions. [2021-06-05 16:44:12,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4687 transitions. [2021-06-05 16:44:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:12,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:12,300 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:12,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 16:44:12,501 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:12,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2065424317, now seen corresponding path program 41 times [2021-06-05 16:44:12,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:12,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962642280] [2021-06-05 16:44:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:13,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:13,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962642280] [2021-06-05 16:44:13,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962642280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:13,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976096687] [2021-06-05 16:44:13,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:13,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:44:13,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:13,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:44:13,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:13,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,791 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:44:13,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 44 [2021-06-05 16:44:13,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:13,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,823 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:44:13,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 36 [2021-06-05 16:44:13,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:13,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,862 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:44:13,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-06-05 16:44:13,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:13,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,897 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:44:13,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2021-06-05 16:44:13,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:13,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,929 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:44:13,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2021-06-05 16:44:13,933 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:13,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,961 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:44:13,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 38 [2021-06-05 16:44:13,964 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:44:13,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,980 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:44:13,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 16:44:13,982 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:13,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,002 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:44:14,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:44:14,003 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:14,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,025 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:44:14,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:44:14,026 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:14,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,062 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:44:14,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 16:44:14,065 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:14,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,083 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:44:14,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 16:44:14,084 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:14,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,100 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:44:14,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:44:14,102 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:14,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,130 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 16:44:14,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-06-05 16:44:14,131 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:14,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,149 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:44:14,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:44:14,150 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:14,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,167 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:44:14,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 16:44:14,168 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:14,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:14,179 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:44:14,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 1 [2021-06-05 16:44:14,179 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:14,314 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-06-05 16:44:14,315 INFO L628 ElimStorePlain]: treesize reduction 202, result has 36.7 percent of original size [2021-06-05 16:44:14,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:44:14,317 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:103 [2021-06-05 16:44:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:14,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976096687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:14,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:14,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 16:44:14,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617011922] [2021-06-05 16:44:14,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:44:14,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:14,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:44:14,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:44:14,510 INFO L87 Difference]: Start difference. First operand 1412 states and 4687 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:14,928 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 16:44:15,225 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 16:44:15,459 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-05 16:44:15,771 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 16:44:16,174 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2021-06-05 16:44:16,634 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-05 16:44:16,882 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 16:44:17,142 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-05 16:44:17,396 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 16:44:17,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:17,670 INFO L93 Difference]: Finished difference Result 2483 states and 7959 transitions. [2021-06-05 16:44:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:44:17,670 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:17,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:17,674 INFO L225 Difference]: With dead ends: 2483 [2021-06-05 16:44:17,674 INFO L226 Difference]: Without dead ends: 2453 [2021-06-05 16:44:17,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 3235.8ms TimeCoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:44:17,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-06-05 16:44:17,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1413. [2021-06-05 16:44:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3236543909348444) internal successors, (4693), 1412 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4693 transitions. [2021-06-05 16:44:17,710 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4693 transitions. Word has length 26 [2021-06-05 16:44:17,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:17,710 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4693 transitions. [2021-06-05 16:44:17,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:17,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4693 transitions. [2021-06-05 16:44:17,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:17,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:17,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:17,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-06-05 16:44:17,935 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:17,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:17,935 INFO L82 PathProgramCache]: Analyzing trace with hash 386531115, now seen corresponding path program 16 times [2021-06-05 16:44:17,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:17,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800089080] [2021-06-05 16:44:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:18,189 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 16:44:18,332 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-06-05 16:44:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:18,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:18,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800089080] [2021-06-05 16:44:18,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800089080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:18,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43735331] [2021-06-05 16:44:18,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:18,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:44:18,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:18,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:44:18,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:19,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:44:19,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:44:19,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:44:19,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:44:19,102 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:44:19,112 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:44:19,122 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:44:19,131 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:44:19,140 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:44:19,150 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:44:19,160 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:44:19,169 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:44:19,179 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:44:19,188 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:44:19,197 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:44:19,205 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:19,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:19,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:44:19,210 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:19,295 INFO L628 ElimStorePlain]: treesize reduction 71, result has 48.2 percent of original size [2021-06-05 16:44:19,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:44:19,297 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:48 [2021-06-05 16:44:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:19,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43735331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:19,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:19,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:44:19,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051143420] [2021-06-05 16:44:19,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:44:19,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:19,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:44:19,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:44:19,359 INFO L87 Difference]: Start difference. First operand 1413 states and 4693 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:19,992 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-05 16:44:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:20,364 INFO L93 Difference]: Finished difference Result 1799 states and 5861 transitions. [2021-06-05 16:44:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:44:20,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:20,367 INFO L225 Difference]: With dead ends: 1799 [2021-06-05 16:44:20,367 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 16:44:20,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1509.1ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:44:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 16:44:20,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1422. [2021-06-05 16:44:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-06-05 16:44:20,385 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-06-05 16:44:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:20,386 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-06-05 16:44:20,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:20,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-06-05 16:44:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:20,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:20,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:20,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:20,588 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash 715690687, now seen corresponding path program 17 times [2021-06-05 16:44:20,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:20,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249432932] [2021-06-05 16:44:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:20,992 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 16:44:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:21,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:21,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249432932] [2021-06-05 16:44:21,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249432932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:21,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935880279] [2021-06-05 16:44:21,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:21,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:44:21,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:21,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:44:21,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:21,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:44:21,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:44:21,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:44:21,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:44:21,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:44:21,904 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:44:21,910 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:44:21,917 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:44:21,923 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:44:21,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:44:21,945 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:44:21,952 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:44:21,959 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:44:21,965 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:44:21,971 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:44:21,977 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:21,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:21,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:21,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:44:21,981 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:22,050 INFO L628 ElimStorePlain]: treesize reduction 71, result has 47.4 percent of original size [2021-06-05 16:44:22,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:44:22,051 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 16:44:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:22,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935880279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:22,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:22,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:44:22,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439543574] [2021-06-05 16:44:22,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:44:22,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:22,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:44:22,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:44:22,101 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:22,542 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-06-05 16:44:22,707 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2021-06-05 16:44:23,023 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-05 16:44:23,200 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-05 16:44:23,328 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 16:44:23,486 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-05 16:44:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:23,717 INFO L93 Difference]: Finished difference Result 1615 states and 5256 transitions. [2021-06-05 16:44:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:44:23,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:23,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:23,720 INFO L225 Difference]: With dead ends: 1615 [2021-06-05 16:44:23,720 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 16:44:23,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2184.9ms TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:44:23,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 16:44:23,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1431. [2021-06-05 16:44:23,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 3.327972027972028) internal successors, (4759), 1430 states have internal predecessors, (4759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:23,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4759 transitions. [2021-06-05 16:44:23,739 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4759 transitions. Word has length 26 [2021-06-05 16:44:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:23,739 INFO L482 AbstractCegarLoop]: Abstraction has 1431 states and 4759 transitions. [2021-06-05 16:44:23,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4759 transitions. [2021-06-05 16:44:23,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:23,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:23,741 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:23,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-06-05 16:44:23,942 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:23,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:23,942 INFO L82 PathProgramCache]: Analyzing trace with hash 547881595, now seen corresponding path program 18 times [2021-06-05 16:44:23,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:23,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243097322] [2021-06-05 16:44:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:24,304 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2021-06-05 16:44:24,505 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 57 [2021-06-05 16:44:24,747 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2021-06-05 16:44:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:24,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:24,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243097322] [2021-06-05 16:44:24,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243097322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:24,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741059529] [2021-06-05 16:44:24,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:24,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:44:24,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:24,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:44:24,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:25,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:25,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:44:25,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,369 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:25,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:44:25,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:25,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:44:25,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,395 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:25,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:44:25,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,405 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:25,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:44:25,406 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,417 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:25,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:44:25,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,427 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:25,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:44:25,428 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:25,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:44:25,439 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,451 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:44:25,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:44:25,452 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,462 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:25,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:44:25,463 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,473 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:25,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:44:25,473 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,483 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:25,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:44:25,483 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,493 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:25,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:44:25,494 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,504 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:25,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:44:25,505 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:25,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:44:25,518 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:25,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:25,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:44:25,527 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:25,620 INFO L628 ElimStorePlain]: treesize reduction 55, result has 61.8 percent of original size [2021-06-05 16:44:25,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:44:25,624 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:88 [2021-06-05 16:44:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:25,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741059529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:25,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:25,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:44:25,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167280959] [2021-06-05 16:44:25,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:44:25,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:25,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:44:25,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:44:25,777 INFO L87 Difference]: Start difference. First operand 1431 states and 4759 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:26,478 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2021-06-05 16:44:26,617 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 16:44:26,961 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 16:44:27,181 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 16:44:27,546 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 16:44:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:27,613 INFO L93 Difference]: Finished difference Result 1909 states and 6216 transitions. [2021-06-05 16:44:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:44:27,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:27,616 INFO L225 Difference]: With dead ends: 1909 [2021-06-05 16:44:27,616 INFO L226 Difference]: Without dead ends: 1894 [2021-06-05 16:44:27,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2508.7ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:44:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-05 16:44:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1422. [2021-06-05 16:44:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:27,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-06-05 16:44:27,634 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-06-05 16:44:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:27,634 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-06-05 16:44:27,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-06-05 16:44:27,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:27,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:27,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:27,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:27,836 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:27,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:27,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2104983929, now seen corresponding path program 19 times [2021-06-05 16:44:27,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:27,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653793807] [2021-06-05 16:44:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:28,116 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-06-05 16:44:28,282 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-06-05 16:44:28,449 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-05 16:44:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:28,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:28,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653793807] [2021-06-05 16:44:28,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653793807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:28,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213479128] [2021-06-05 16:44:28,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:44:28,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:29,079 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 16:44:29,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:29,143 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:44:29,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:44:29,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:29,280 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 16:44:29,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:29,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:29,295 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:44:29,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 16:44:29,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:29,430 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:44:29,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:29,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:29,445 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:44:29,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:44:29,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:29,575 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 16:44:29,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:29,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:29,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:29,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:44:29,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:29,714 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:44:29,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:29,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:29,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:29,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:44:29,729 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:29,853 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:44:29,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:29,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:29,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:29,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:44:29,868 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:29,990 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 16:44:29,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:29,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:30,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:30,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:44:30,005 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:30,121 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:44:30,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:30,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:30,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:30,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:44:30,136 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:30,248 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:44:30,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:30,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:44:30,256 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-05 16:44:30,415 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 16:44:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:30,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213479128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:30,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:30,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:44:30,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248715014] [2021-06-05 16:44:30,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:44:30,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:30,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:44:30,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:44:30,502 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:31,294 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 16:44:31,565 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2021-06-05 16:44:31,824 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 16:44:32,322 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-06-05 16:44:32,761 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-06-05 16:44:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:33,004 INFO L93 Difference]: Finished difference Result 2073 states and 6674 transitions. [2021-06-05 16:44:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:44:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:33,007 INFO L225 Difference]: With dead ends: 2073 [2021-06-05 16:44:33,007 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 16:44:33,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3251.6ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:44:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 16:44:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1419. [2021-06-05 16:44:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3222849083215795) internal successors, (4711), 1418 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4711 transitions. [2021-06-05 16:44:33,036 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4711 transitions. Word has length 26 [2021-06-05 16:44:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:33,036 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4711 transitions. [2021-06-05 16:44:33,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4711 transitions. [2021-06-05 16:44:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:33,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:33,039 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:33,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable987 [2021-06-05 16:44:33,260 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:33,260 INFO L82 PathProgramCache]: Analyzing trace with hash 178197831, now seen corresponding path program 20 times [2021-06-05 16:44:33,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:33,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013495858] [2021-06-05 16:44:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:33,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013495858] [2021-06-05 16:44:33,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013495858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393693384] [2021-06-05 16:44:33,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:33,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:44:33,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:33,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:44:33,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:34,148 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:34,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:44:34,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,168 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:44:34,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:44:34,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,191 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:44:34,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 16:44:34,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,201 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:34,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:44:34,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,222 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:44:34,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:44:34,224 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,233 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:34,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:44:34,234 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,243 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:34,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:44:34,244 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,258 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:44:34,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 16 [2021-06-05 16:44:34,259 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:34,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 16:44:34,276 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,285 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:34,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:44:34,286 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,295 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:34,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:44:34,296 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,306 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:34,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:44:34,307 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,325 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:44:34,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 16:44:34,328 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,339 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:34,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:44:34,340 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,352 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:34,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:44:34,352 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,359 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:34,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:44:34,360 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:34,481 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-05 16:44:34,482 INFO L628 ElimStorePlain]: treesize reduction 63, result has 68.8 percent of original size [2021-06-05 16:44:34,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:44:34,489 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:157 [2021-06-05 16:44:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:34,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393693384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:34,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:34,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:44:34,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373058489] [2021-06-05 16:44:34,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:44:34,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:34,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:44:34,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:44:34,633 INFO L87 Difference]: Start difference. First operand 1419 states and 4711 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:35,890 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 16:44:36,072 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2021-06-05 16:44:36,258 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 16:44:36,393 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 16:44:36,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:36,987 INFO L93 Difference]: Finished difference Result 1996 states and 6371 transitions. [2021-06-05 16:44:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:44:36,987 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:36,990 INFO L225 Difference]: With dead ends: 1996 [2021-06-05 16:44:36,990 INFO L226 Difference]: Without dead ends: 1956 [2021-06-05 16:44:36,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2500.6ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:44:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-06-05 16:44:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1468. [2021-06-05 16:44:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.319700068166326) internal successors, (4870), 1467 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4870 transitions. [2021-06-05 16:44:37,009 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4870 transitions. Word has length 26 [2021-06-05 16:44:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:37,009 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4870 transitions. [2021-06-05 16:44:37,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4870 transitions. [2021-06-05 16:44:37,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:37,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:37,011 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:37,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-06-05 16:44:37,212 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:37,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:37,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2057127289, now seen corresponding path program 21 times [2021-06-05 16:44:37,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:37,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619288766] [2021-06-05 16:44:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:37,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:37,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619288766] [2021-06-05 16:44:37,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619288766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:37,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437284903] [2021-06-05 16:44:37,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:37,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:44:37,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:37,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:44:37,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:37,994 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:44:37,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:44:37,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,006 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:38,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:44:38,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,026 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:44:38,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:44:38,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,049 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:44:38,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:44:38,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,064 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:38,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:44:38,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,075 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:38,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:44:38,077 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,097 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:44:38,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:44:38,099 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,110 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:38,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:44:38,111 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,132 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:44:38,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 16:44:38,134 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,145 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:38,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:44:38,146 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,157 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:38,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:44:38,158 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,181 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:44:38,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 16:44:38,183 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,193 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:38,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:44:38,194 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:38,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 16:44:38,213 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,224 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:38,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:44:38,225 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,233 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:44:38,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:44:38,234 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:38,458 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-06-05 16:44:38,459 INFO L628 ElimStorePlain]: treesize reduction 156, result has 50.5 percent of original size [2021-06-05 16:44:38,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:44:38,468 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:873, output treesize:221 [2021-06-05 16:44:38,625 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 16:44:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:38,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437284903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:38,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:38,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:44:38,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447556067] [2021-06-05 16:44:38,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:44:38,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:38,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:44:38,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:44:38,844 INFO L87 Difference]: Start difference. First operand 1468 states and 4870 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:39,535 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 16:44:39,928 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 16:44:40,153 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 16:44:40,446 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 16:44:40,683 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-06-05 16:44:40,983 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-06-05 16:44:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:41,051 INFO L93 Difference]: Finished difference Result 2188 states and 6976 transitions. [2021-06-05 16:44:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:44:41,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:41,055 INFO L225 Difference]: With dead ends: 2188 [2021-06-05 16:44:41,055 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 16:44:41,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2472.1ms TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:44:41,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 16:44:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1486. [2021-06-05 16:44:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.3252525252525253) internal successors, (4938), 1485 states have internal predecessors, (4938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:41,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4938 transitions. [2021-06-05 16:44:41,076 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4938 transitions. Word has length 26 [2021-06-05 16:44:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:41,076 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4938 transitions. [2021-06-05 16:44:41,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4938 transitions. [2021-06-05 16:44:41,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:41,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:41,079 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:41,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:41,287 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:41,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:41,288 INFO L82 PathProgramCache]: Analyzing trace with hash 309162187, now seen corresponding path program 22 times [2021-06-05 16:44:41,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:41,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579961530] [2021-06-05 16:44:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:41,541 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 16:44:41,679 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-05 16:44:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:41,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:41,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579961530] [2021-06-05 16:44:41,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579961530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:41,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651082668] [2021-06-05 16:44:41,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:41,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:44:41,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:41,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:44:41,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:42,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:42,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:42,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:42,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:44:42,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:42,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:42,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:42,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:44:42,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:42,469 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 16:44:42,469 INFO L628 ElimStorePlain]: treesize reduction 106, result has 62.4 percent of original size [2021-06-05 16:44:42,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:42,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:42,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:44:42,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:42,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:42,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:42,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:44:42,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:42,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:42,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:42,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:42,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:42,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:44:42,605 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:42,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:42,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:42,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:44:42,610 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:42,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:42,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:44:42,661 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:337, output treesize:72 [2021-06-05 16:44:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:42,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651082668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:42,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:42,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:44:42,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013200978] [2021-06-05 16:44:42,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:44:42,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:42,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:44:42,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:44:42,737 INFO L87 Difference]: Start difference. First operand 1486 states and 4938 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:43,082 INFO L93 Difference]: Finished difference Result 1609 states and 5273 transitions. [2021-06-05 16:44:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:44:43,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:43,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:43,084 INFO L225 Difference]: With dead ends: 1609 [2021-06-05 16:44:43,084 INFO L226 Difference]: Without dead ends: 1594 [2021-06-05 16:44:43,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 921.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:44:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-06-05 16:44:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1492. [2021-06-05 16:44:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.3272971160295106) internal successors, (4961), 1491 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:43,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4961 transitions. [2021-06-05 16:44:43,101 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4961 transitions. Word has length 26 [2021-06-05 16:44:43,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:43,101 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 4961 transitions. [2021-06-05 16:44:43,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:43,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4961 transitions. [2021-06-05 16:44:43,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:43,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:43,103 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:43,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:43,304 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:43,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:43,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1879987787, now seen corresponding path program 23 times [2021-06-05 16:44:43,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:43,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600705362] [2021-06-05 16:44:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:43,707 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-06-05 16:44:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:43,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600705362] [2021-06-05 16:44:43,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600705362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828176340] [2021-06-05 16:44:43,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:43,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:44:43,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:44:43,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:44,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:44:44,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,130 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:44,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:44:44,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,265 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:44:44,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:44:44,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,290 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:44,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:44:44,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,399 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 16:44:44,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:44:44,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,431 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:44:44,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:44:44,433 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,543 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 16:44:44,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:44:44,557 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,567 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:44:44,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:44:44,568 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,730 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-06-05 16:44:44,730 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.4 percent of original size [2021-06-05 16:44:44,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:44:44,743 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:377, output treesize:160 [2021-06-05 16:44:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:44,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828176340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:44,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:44,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:44:44,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965331006] [2021-06-05 16:44:44,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:44:44,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:44:44,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:44:44,926 INFO L87 Difference]: Start difference. First operand 1492 states and 4961 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:45,899 INFO L93 Difference]: Finished difference Result 1996 states and 6490 transitions. [2021-06-05 16:44:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:44:45,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:45,902 INFO L225 Difference]: With dead ends: 1996 [2021-06-05 16:44:45,902 INFO L226 Difference]: Without dead ends: 1971 [2021-06-05 16:44:45,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1317.3ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:44:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-06-05 16:44:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1499. [2021-06-05 16:44:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.3317757009345796) internal successors, (4991), 1498 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 4991 transitions. [2021-06-05 16:44:45,935 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 4991 transitions. Word has length 26 [2021-06-05 16:44:45,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:45,935 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 4991 transitions. [2021-06-05 16:44:45,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 4991 transitions. [2021-06-05 16:44:45,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:45,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:45,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:46,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:46,138 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:46,139 INFO L82 PathProgramCache]: Analyzing trace with hash -224872725, now seen corresponding path program 24 times [2021-06-05 16:44:46,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:46,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440925015] [2021-06-05 16:44:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:46,618 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2021-06-05 16:44:46,910 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2021-06-05 16:44:47,139 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-06-05 16:44:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:47,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:47,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440925015] [2021-06-05 16:44:47,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440925015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:47,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239687708] [2021-06-05 16:44:47,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:47,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:44:47,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:47,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:44:47,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:47,864 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:44:48,192 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 96 [2021-06-05 16:44:48,312 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_125], 6=[v_prenex_123, v_prenex_124, v_prenex_126]} [2021-06-05 16:44:48,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:48,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:48,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:44:48,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:48,497 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-06-05 16:44:48,497 INFO L628 ElimStorePlain]: treesize reduction 263, result has 47.9 percent of original size [2021-06-05 16:44:48,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:48,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:48,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:44:48,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:48,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:48,578 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 16:44:48,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 35 [2021-06-05 16:44:48,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:48,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:48,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:48,657 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:44:48,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 16:44:48,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:48,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:48,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:48,728 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:44:48,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 48 [2021-06-05 16:44:48,729 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:48,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:48,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:44:48,779 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:521, output treesize:74 [2021-06-05 16:44:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:48,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239687708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:48,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:48,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:44:48,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590458997] [2021-06-05 16:44:48,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:44:48,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:48,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:44:48,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:44:48,861 INFO L87 Difference]: Start difference. First operand 1499 states and 4991 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:49,068 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 32 [2021-06-05 16:44:49,712 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-06-05 16:44:50,129 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 16:44:50,539 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 123 [2021-06-05 16:44:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:50,668 INFO L93 Difference]: Finished difference Result 1881 states and 6161 transitions. [2021-06-05 16:44:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:44:50,668 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:50,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:50,670 INFO L225 Difference]: With dead ends: 1881 [2021-06-05 16:44:50,670 INFO L226 Difference]: Without dead ends: 1866 [2021-06-05 16:44:50,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 3036.8ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:44:50,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-05 16:44:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1508. [2021-06-05 16:44:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 3.33178500331785) internal successors, (5021), 1507 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 5021 transitions. [2021-06-05 16:44:50,688 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 5021 transitions. Word has length 26 [2021-06-05 16:44:50,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:50,688 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 5021 transitions. [2021-06-05 16:44:50,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:50,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 5021 transitions. [2021-06-05 16:44:50,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:50,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:50,690 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:50,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1124 [2021-06-05 16:44:50,890 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:50,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1842405505, now seen corresponding path program 25 times [2021-06-05 16:44:50,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:50,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31135151] [2021-06-05 16:44:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:51,147 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-06-05 16:44:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:51,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:51,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31135151] [2021-06-05 16:44:51,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31135151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:51,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007914892] [2021-06-05 16:44:51,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:51,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:44:51,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:52,073 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:44:52,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:52,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:52,212 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-06-05 16:44:52,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 102 treesize of output 68 [2021-06-05 16:44:52,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:52,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:52,229 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:44:52,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 1 [2021-06-05 16:44:52,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:52,668 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 173 [2021-06-05 16:44:52,669 INFO L628 ElimStorePlain]: treesize reduction 703, result has 43.6 percent of original size [2021-06-05 16:44:52,684 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:44:52,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 16:44:52,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:52,832 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 16:44:52,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:52,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:52,863 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:44:52,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 35 [2021-06-05 16:44:52,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:53,225 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 150 [2021-06-05 16:44:53,225 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.4 percent of original size [2021-06-05 16:44:53,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:53,241 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:44:53,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 38 [2021-06-05 16:44:53,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:53,380 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-05 16:44:53,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:53,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:53,404 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:44:53,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-06-05 16:44:53,406 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:53,539 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 16:44:53,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:53,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:53,559 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-05 16:44:53,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-05 16:44:53,561 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:53,685 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:44:53,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:53,700 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:44:53,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-06-05 16:44:53,701 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:53,822 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:44:53,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:53,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:53,844 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:44:53,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 55 [2021-06-05 16:44:53,847 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:53,958 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:44:53,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:53,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:44:53,966 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-06-05 16:44:54,117 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 16:44:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:54,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007914892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:54,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:54,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:44:54,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930627882] [2021-06-05 16:44:54,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:44:54,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:54,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:44:54,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:44:54,217 INFO L87 Difference]: Start difference. First operand 1508 states and 5021 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:54,908 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-06-05 16:44:55,282 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-05 16:44:55,484 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:44:56,122 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2021-06-05 16:44:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:56,278 INFO L93 Difference]: Finished difference Result 2002 states and 6531 transitions. [2021-06-05 16:44:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:44:56,279 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:56,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:56,282 INFO L225 Difference]: With dead ends: 2002 [2021-06-05 16:44:56,282 INFO L226 Difference]: Without dead ends: 1983 [2021-06-05 16:44:56,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2805.7ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:44:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-06-05 16:44:56,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1511. [2021-06-05 16:44:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 3.3350993377483444) internal successors, (5036), 1510 states have internal predecessors, (5036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 5036 transitions. [2021-06-05 16:44:56,308 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 5036 transitions. Word has length 26 [2021-06-05 16:44:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:56,308 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 5036 transitions. [2021-06-05 16:44:56,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 5036 transitions. [2021-06-05 16:44:56,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:56,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:56,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:56,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1135 [2021-06-05 16:44:56,511 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:56,512 INFO L82 PathProgramCache]: Analyzing trace with hash 762618887, now seen corresponding path program 26 times [2021-06-05 16:44:56,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:56,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197289524] [2021-06-05 16:44:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:57,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:57,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197289524] [2021-06-05 16:44:57,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197289524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:57,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572760057] [2021-06-05 16:44:57,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:57,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:44:57,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:57,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:44:57,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:57,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:57,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:44:57,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,333 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:44:57,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:44:57,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,343 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:57,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:44:57,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,354 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:57,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:44:57,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:57,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:44:57,368 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,380 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:44:57,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:44:57,381 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:57,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:44:57,395 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,405 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:57,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:44:57,406 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,418 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:57,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:44:57,419 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,428 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:57,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:44:57,429 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:57,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:44:57,439 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,448 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:57,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:44:57,449 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,458 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:57,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:44:57,459 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,468 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:57,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:44:57,469 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,478 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:57,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:44:57,479 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:57,485 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:44:57,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:44:57,486 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:57,566 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-06-05 16:44:57,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:44:57,567 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 16:44:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:57,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572760057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:57,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:57,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:44:57,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103518559] [2021-06-05 16:44:57,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:44:57,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:57,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:44:57,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:44:57,723 INFO L87 Difference]: Start difference. First operand 1511 states and 5036 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:58,086 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2021-06-05 16:44:58,445 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-06-05 16:44:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:59,156 INFO L93 Difference]: Finished difference Result 2063 states and 6723 transitions. [2021-06-05 16:44:59,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:44:59,156 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:44:59,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:59,159 INFO L225 Difference]: With dead ends: 2063 [2021-06-05 16:44:59,160 INFO L226 Difference]: Without dead ends: 2038 [2021-06-05 16:44:59,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1739.2ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:44:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-06-05 16:44:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1517. [2021-06-05 16:44:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3337730870712403) internal successors, (5054), 1516 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5054 transitions. [2021-06-05 16:44:59,180 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5054 transitions. Word has length 26 [2021-06-05 16:44:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:59,181 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 5054 transitions. [2021-06-05 16:44:59,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5054 transitions. [2021-06-05 16:44:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:44:59,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:59,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:59,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1165 [2021-06-05 16:44:59,383 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:59,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:59,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2136387655, now seen corresponding path program 42 times [2021-06-05 16:44:59,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:59,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111521616] [2021-06-05 16:44:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:59,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:59,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111521616] [2021-06-05 16:44:59,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111521616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:59,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852369100] [2021-06-05 16:44:59,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:59,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:44:59,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:59,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:44:59,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:00,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 35 [2021-06-05 16:45:00,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2021-06-05 16:45:00,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 16:45:00,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-06-05 16:45:00,500 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 15 [2021-06-05 16:45:00,511 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2021-06-05 16:45:00,523 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 21 [2021-06-05 16:45:00,535 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 16:45:00,546 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 30 [2021-06-05 16:45:00,558 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 16:45:00,569 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 35 [2021-06-05 16:45:00,581 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 30 [2021-06-05 16:45:00,593 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 32 [2021-06-05 16:45:00,605 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 30 [2021-06-05 16:45:00,616 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 29 [2021-06-05 16:45:00,626 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 21 [2021-06-05 16:45:00,633 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:00,683 INFO L628 ElimStorePlain]: treesize reduction 44, result has 49.4 percent of original size [2021-06-05 16:45:00,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:45:00,685 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1121, output treesize:33 [2021-06-05 16:45:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:00,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852369100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:00,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:00,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:45:00,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33238881] [2021-06-05 16:45:00,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:45:00,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:00,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:45:00,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:45:00,735 INFO L87 Difference]: Start difference. First operand 1517 states and 5054 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:02,054 INFO L93 Difference]: Finished difference Result 1955 states and 6355 transitions. [2021-06-05 16:45:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:45:02,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:02,057 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 16:45:02,057 INFO L226 Difference]: Without dead ends: 1929 [2021-06-05 16:45:02,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1538.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:45:02,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-05 16:45:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1521. [2021-06-05 16:45:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-06-05 16:45:02,079 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-06-05 16:45:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:02,079 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-06-05 16:45:02,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:02,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-06-05 16:45:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:02,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:02,081 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:02,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-06-05 16:45:02,282 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:02,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:02,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1090705077, now seen corresponding path program 43 times [2021-06-05 16:45:02,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:02,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461925437] [2021-06-05 16:45:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:02,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:02,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461925437] [2021-06-05 16:45:02,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461925437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:02,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754626385] [2021-06-05 16:45:02,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:02,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:45:02,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:03,173 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 16:45:03,228 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_143], 6=[v_prenex_141, v_prenex_145]} [2021-06-05 16:45:03,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:03,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:03,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:03,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 21 [2021-06-05 16:45:03,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:03,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:03,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:03,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-06-05 16:45:03,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:03,378 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 16:45:03,378 INFO L628 ElimStorePlain]: treesize reduction 221, result has 44.2 percent of original size [2021-06-05 16:45:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:03,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:45:03,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:03,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:03,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:03,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:03,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:03,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:03,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 16:45:03,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:03,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:03,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:03,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:03,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:03,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 16:45:03,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:03,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:03,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:45:03,528 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:483, output treesize:57 [2021-06-05 16:45:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:03,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754626385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:03,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:03,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:45:03,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187791873] [2021-06-05 16:45:03,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:03,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:03,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:03,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:03,588 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:05,095 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 16:45:05,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:05,236 INFO L93 Difference]: Finished difference Result 2127 states and 6917 transitions. [2021-06-05 16:45:05,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:45:05,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:05,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:05,239 INFO L225 Difference]: With dead ends: 2127 [2021-06-05 16:45:05,239 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 16:45:05,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2075.9ms TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:45:05,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 16:45:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1521. [2021-06-05 16:45:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-06-05 16:45:05,263 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-06-05 16:45:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:05,263 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-06-05 16:45:05,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-06-05 16:45:05,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:05,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:05,266 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:05,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1283,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:05,479 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:05,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1679080501, now seen corresponding path program 27 times [2021-06-05 16:45:05,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:05,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575530170] [2021-06-05 16:45:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:05,705 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-06-05 16:45:05,882 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-05 16:45:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:06,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:06,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575530170] [2021-06-05 16:45:06,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575530170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:06,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590273572] [2021-06-05 16:45:06,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:06,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:45:06,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:06,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:45:06,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:06,716 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 16:45:06,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:06,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:06,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:06,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:45:06,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:06,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:06,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:06,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:45:06,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:06,904 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:45:06,905 INFO L628 ElimStorePlain]: treesize reduction 39, result has 81.0 percent of original size [2021-06-05 16:45:06,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:06,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:06,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:06,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:45:06,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:06,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:06,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:45:06,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:07,007 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.2 percent of original size [2021-06-05 16:45:07,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:07,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:07,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:45:07,012 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:07,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:07,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:07,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:07,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:45:07,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:07,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:07,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:45:07,093 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-05 16:45:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:07,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590273572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:07,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:07,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:45:07,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891629618] [2021-06-05 16:45:07,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:07,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:07,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:07,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:07,169 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:07,704 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 16:45:08,551 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2021-06-05 16:45:08,814 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 16:45:08,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:08,973 INFO L93 Difference]: Finished difference Result 1978 states and 6388 transitions. [2021-06-05 16:45:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:45:08,974 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:08,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:08,977 INFO L225 Difference]: With dead ends: 1978 [2021-06-05 16:45:08,977 INFO L226 Difference]: Without dead ends: 1963 [2021-06-05 16:45:08,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2310.4ms TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:45:08,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-06-05 16:45:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1529. [2021-06-05 16:45:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-06-05 16:45:08,997 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-06-05 16:45:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:08,997 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-06-05 16:45:08,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-06-05 16:45:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:08,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:08,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:09,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-06-05 16:45:09,200 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:09,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:09,200 INFO L82 PathProgramCache]: Analyzing trace with hash -128698937, now seen corresponding path program 44 times [2021-06-05 16:45:09,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:09,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095585599] [2021-06-05 16:45:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:09,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:09,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095585599] [2021-06-05 16:45:09,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095585599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:09,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744449032] [2021-06-05 16:45:09,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:09,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:45:09,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:09,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:45:09,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:10,018 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 16:45:10,304 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_170, v_prenex_172, v_prenex_162, v_prenex_164], 5=[A, v_prenex_175, v_prenex_166, v_prenex_168]} [2021-06-05 16:45:10,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:10,334 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:45:10,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:45:10,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:10,732 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 156 [2021-06-05 16:45:10,733 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-06-05 16:45:10,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:10,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:10,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 16:45:10,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:45:11,165 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 151 [2021-06-05 16:45:11,166 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-06-05 16:45:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,194 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:45:11,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:45:11,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,398 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 16:45:11,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:11,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:11,424 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:45:11,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2021-06-05 16:45:11,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:11,617 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 16:45:11,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:11,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:11,647 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:45:11,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 16:45:11,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:12,038 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 134 [2021-06-05 16:45:12,039 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.2 percent of original size [2021-06-05 16:45:12,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:12,063 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:45:12,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2021-06-05 16:45:12,064 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:12,250 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-05 16:45:12,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:12,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:12,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:12,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 40 [2021-06-05 16:45:12,277 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:12,478 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 16:45:12,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:12,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:12,502 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:45:12,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 16:45:12,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:12,695 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 16:45:12,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:12,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:45:12,727 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:473, output treesize:269 [2021-06-05 16:45:12,866 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-05 16:45:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:12,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744449032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:12,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:12,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:45:12,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487498414] [2021-06-05 16:45:12,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:45:12,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:12,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:45:12,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:12,927 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:13,363 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-06-05 16:45:13,637 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 50 [2021-06-05 16:45:14,064 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-05 16:45:15,190 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2021-06-05 16:45:15,411 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-05 16:45:15,582 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-06-05 16:45:16,120 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-06-05 16:45:16,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:16,525 INFO L93 Difference]: Finished difference Result 2479 states and 7802 transitions. [2021-06-05 16:45:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:45:16,525 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:16,529 INFO L225 Difference]: With dead ends: 2479 [2021-06-05 16:45:16,529 INFO L226 Difference]: Without dead ends: 2435 [2021-06-05 16:45:16,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 3628.2ms TimeCoverageRelationStatistics Valid=513, Invalid=2567, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:45:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-06-05 16:45:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1529. [2021-06-05 16:45:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-06-05 16:45:16,551 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-06-05 16:45:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:16,551 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-06-05 16:45:16,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-06-05 16:45:16,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:16,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:16,553 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:16,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1305,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:16,753 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:16,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1105017781, now seen corresponding path program 45 times [2021-06-05 16:45:16,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:16,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032605443] [2021-06-05 16:45:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:17,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:17,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032605443] [2021-06-05 16:45:17,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032605443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:17,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787135994] [2021-06-05 16:45:17,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:17,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:45:17,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:17,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 16:45:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:17,917 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 16:45:17,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 54 [2021-06-05 16:45:17,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:17,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:17,969 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 16:45:17,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 67 [2021-06-05 16:45:17,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:17,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,034 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 16:45:18,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-05 16:45:18,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,111 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 16:45:18,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 57 [2021-06-05 16:45:18,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,182 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-06-05 16:45:18,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 16:45:18,186 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,242 INFO L354 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2021-06-05 16:45:18,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 43 [2021-06-05 16:45:18,246 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,315 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 16:45:18,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 67 [2021-06-05 16:45:18,326 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,385 INFO L354 Elim1Store]: treesize reduction 23, result has 48.9 percent of original size [2021-06-05 16:45:18,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 50 [2021-06-05 16:45:18,387 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,446 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 16:45:18,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 67 [2021-06-05 16:45:18,460 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,525 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-05 16:45:18,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 77 [2021-06-05 16:45:18,557 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,584 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:45:18,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 16:45:18,585 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,613 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:45:18,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:45:18,614 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,642 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:45:18,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 16:45:18,642 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,686 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:45:18,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 1 [2021-06-05 16:45:18,687 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,709 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:45:18,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 16:45:18,710 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:18,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:18,726 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:45:18,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 1 [2021-06-05 16:45:18,727 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:19,322 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 92 [2021-06-05 16:45:19,323 INFO L628 ElimStorePlain]: treesize reduction 622, result has 44.9 percent of original size [2021-06-05 16:45:19,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:45:19,351 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1289, output treesize:912 [2021-06-05 16:45:19,857 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89 [2021-06-05 16:45:20,031 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-05 16:45:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:20,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787135994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:20,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:20,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:45:20,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470223029] [2021-06-05 16:45:20,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:45:20,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:20,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:45:20,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:45:20,110 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:21,322 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 16:45:21,751 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 16:45:21,879 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 16:45:22,023 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-05 16:45:22,178 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-06-05 16:45:22,540 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 16:45:22,706 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 16:45:22,898 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 16:45:23,159 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 16:45:23,401 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 16:45:23,915 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-06-05 16:45:24,433 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-06-05 16:45:24,726 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 64 [2021-06-05 16:45:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:24,877 INFO L93 Difference]: Finished difference Result 2975 states and 9347 transitions. [2021-06-05 16:45:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:45:24,877 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:24,881 INFO L225 Difference]: With dead ends: 2975 [2021-06-05 16:45:24,881 INFO L226 Difference]: Without dead ends: 2945 [2021-06-05 16:45:24,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 5098.1ms TimeCoverageRelationStatistics Valid=517, Invalid=2789, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:45:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-06-05 16:45:24,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 1537. [2021-06-05 16:45:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.3430989583333335) internal successors, (5135), 1536 states have internal predecessors, (5135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5135 transitions. [2021-06-05 16:45:24,907 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5135 transitions. Word has length 26 [2021-06-05 16:45:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:24,907 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 5135 transitions. [2021-06-05 16:45:24,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5135 transitions. [2021-06-05 16:45:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:24,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:24,909 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:25,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:25,109 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:25,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:25,110 INFO L82 PathProgramCache]: Analyzing trace with hash -89210125, now seen corresponding path program 28 times [2021-06-05 16:45:25,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:25,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133696244] [2021-06-05 16:45:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:25,342 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 16:45:25,499 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-05 16:45:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:25,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:25,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133696244] [2021-06-05 16:45:25,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133696244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:25,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653741678] [2021-06-05 16:45:25,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:25,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:25,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:25,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:45:25,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:26,212 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 16:45:26,410 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2021-06-05 16:45:26,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:45:26,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,640 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:45:26,641 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.1 percent of original size [2021-06-05 16:45:26,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:45:26,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:26,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:45:26,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:45:26,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,799 INFO L628 ElimStorePlain]: treesize reduction 19, result has 83.9 percent of original size [2021-06-05 16:45:26,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:26,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:26,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:45:26,804 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:26,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:26,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:45:26,842 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-05 16:45:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:26,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653741678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:26,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:26,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:45:26,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048014089] [2021-06-05 16:45:26,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:45:26,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:26,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:45:26,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:45:26,914 INFO L87 Difference]: Start difference. First operand 1537 states and 5135 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:27,492 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 16:45:27,774 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 16:45:28,158 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 16:45:28,427 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 16:45:28,718 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-05 16:45:28,909 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 16:45:29,208 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2021-06-05 16:45:29,451 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-06-05 16:45:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:29,613 INFO L93 Difference]: Finished difference Result 2083 states and 6714 transitions. [2021-06-05 16:45:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:45:29,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:29,617 INFO L225 Difference]: With dead ends: 2083 [2021-06-05 16:45:29,617 INFO L226 Difference]: Without dead ends: 2068 [2021-06-05 16:45:29,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 3195.4ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:45:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-06-05 16:45:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1540. [2021-06-05 16:45:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 3.3443794671864846) internal successors, (5147), 1539 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 5147 transitions. [2021-06-05 16:45:29,638 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 5147 transitions. Word has length 26 [2021-06-05 16:45:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:29,638 INFO L482 AbstractCegarLoop]: Abstraction has 1540 states and 5147 transitions. [2021-06-05 16:45:29,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 5147 transitions. [2021-06-05 16:45:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:29,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:29,640 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:29,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1508,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:29,841 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:29,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:29,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1706742905, now seen corresponding path program 29 times [2021-06-05 16:45:29,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:29,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119577668] [2021-06-05 16:45:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:30,086 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-05 16:45:30,260 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-05 16:45:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:30,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:30,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119577668] [2021-06-05 16:45:30,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119577668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:30,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537420188] [2021-06-05 16:45:30,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:30,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:45:30,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:30,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:45:30,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:30,983 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 16:45:31,229 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:45:31,359 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:45:31,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 46 [2021-06-05 16:45:31,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:31,542 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2021-06-05 16:45:31,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:31,559 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:45:31,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 43 [2021-06-05 16:45:31,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:31,712 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-06-05 16:45:31,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:31,732 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:45:31,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 57 [2021-06-05 16:45:31,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:31,881 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-05 16:45:31,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:31,900 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:45:31,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 16:45:31,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:32,048 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 16:45:32,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:32,066 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:45:32,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 50 [2021-06-05 16:45:32,067 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:32,208 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:45:32,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:32,226 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:45:32,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 16:45:32,228 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:32,358 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:45:32,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:32,372 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:45:32,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 53 [2021-06-05 16:45:32,373 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:32,491 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:45:32,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:32,506 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:45:32,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 47 [2021-06-05 16:45:32,509 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:32,736 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-06-05 16:45:32,736 INFO L628 ElimStorePlain]: treesize reduction 8, result has 96.6 percent of original size [2021-06-05 16:45:32,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:45:32,756 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:687, output treesize:216 [2021-06-05 16:45:32,894 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-06-05 16:45:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:32,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537420188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:32,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:32,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:45:32,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531218517] [2021-06-05 16:45:32,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:45:32,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:32,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:45:32,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:45:32,980 INFO L87 Difference]: Start difference. First operand 1540 states and 5147 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:33,563 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-06-05 16:45:33,858 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 16:45:34,472 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-06-05 16:45:35,233 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2021-06-05 16:45:35,725 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 124 [2021-06-05 16:45:36,278 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2021-06-05 16:45:36,870 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 128 [2021-06-05 16:45:37,523 WARN L205 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 123 [2021-06-05 16:45:38,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:38,084 INFO L93 Difference]: Finished difference Result 2320 states and 7403 transitions. [2021-06-05 16:45:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:45:38,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:38,087 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 16:45:38,087 INFO L226 Difference]: Without dead ends: 2301 [2021-06-05 16:45:38,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 5365.8ms TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:45:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-06-05 16:45:38,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1535. [2021-06-05 16:45:38,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3428943937418514) internal successors, (5128), 1534 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5128 transitions. [2021-06-05 16:45:38,111 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5128 transitions. Word has length 26 [2021-06-05 16:45:38,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:38,111 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5128 transitions. [2021-06-05 16:45:38,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:38,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5128 transitions. [2021-06-05 16:45:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:38,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:38,113 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:38,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1517,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:38,331 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:38,331 INFO L82 PathProgramCache]: Analyzing trace with hash 97294587, now seen corresponding path program 46 times [2021-06-05 16:45:38,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:38,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211062571] [2021-06-05 16:45:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:38,627 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 30 [2021-06-05 16:45:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:38,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:38,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211062571] [2021-06-05 16:45:38,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211062571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:38,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560199085] [2021-06-05 16:45:38,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:38,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:45:38,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:38,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:45:38,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:39,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 16:45:39,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 16:45:39,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:45:39,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 16:45:39,556 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 16:45:39,564 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 16:45:39,572 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:45:39,580 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:45:39,588 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 16:45:39,596 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:45:39,603 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 16:45:39,611 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:45:39,619 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 16:45:39,627 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 16:45:39,634 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:45:39,641 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:39,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:39,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 16:45:39,646 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:39,688 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-06-05 16:45:39,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:45:39,689 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-06-05 16:45:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:39,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560199085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:39,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:39,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 16:45:39,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500568154] [2021-06-05 16:45:39,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:45:39,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:39,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:45:39,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:45:39,731 INFO L87 Difference]: Start difference. First operand 1535 states and 5128 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:40,446 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 16:45:42,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:42,025 INFO L93 Difference]: Finished difference Result 3148 states and 9991 transitions. [2021-06-05 16:45:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:45:42,025 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:42,029 INFO L225 Difference]: With dead ends: 3148 [2021-06-05 16:45:42,030 INFO L226 Difference]: Without dead ends: 3112 [2021-06-05 16:45:42,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2414.1ms TimeCoverageRelationStatistics Valid=438, Invalid=1914, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:45:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-05 16:45:42,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 1630. [2021-06-05 16:45:42,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.365254757519951) internal successors, (5482), 1629 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5482 transitions. [2021-06-05 16:45:42,055 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5482 transitions. Word has length 26 [2021-06-05 16:45:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:42,055 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5482 transitions. [2021-06-05 16:45:42,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5482 transitions. [2021-06-05 16:45:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:42,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:42,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:42,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1531,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:42,257 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:42,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:42,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1930943239, now seen corresponding path program 47 times [2021-06-05 16:45:42,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:42,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063469699] [2021-06-05 16:45:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:42,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:42,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063469699] [2021-06-05 16:45:42,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063469699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:42,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373966471] [2021-06-05 16:45:42,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:42,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:45:42,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:42,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:45:42,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:43,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,460 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:45:43,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 16:45:43,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,491 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:45:43,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 16:45:43,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,514 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:45:43,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:45:43,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,532 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:45:43,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 16:45:43,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,561 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:45:43,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 39 [2021-06-05 16:45:43,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,590 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:45:43,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 16:45:43,592 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,610 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:45:43,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:45:43,611 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:43,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 60 [2021-06-05 16:45:43,651 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,669 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:45:43,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:45:43,671 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,689 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:45:43,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 16:45:43,690 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,710 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:45:43,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 16:45:43,711 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,731 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:45:43,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 1 [2021-06-05 16:45:43,732 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,751 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:45:43,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:45:43,752 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,769 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:45:43,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:45:43,770 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,790 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:45:43,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:45:43,791 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:43,807 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:45:43,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:45:43,808 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:43,916 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2021-06-05 16:45:43,916 INFO L628 ElimStorePlain]: treesize reduction 130, result has 42.0 percent of original size [2021-06-05 16:45:43,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:45:43,919 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:93 [2021-06-05 16:45:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:44,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373966471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:44,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:44,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 16:45:44,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990510843] [2021-06-05 16:45:44,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:45:44,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:44,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:45:44,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:45:44,099 INFO L87 Difference]: Start difference. First operand 1630 states and 5482 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:44,689 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 16:45:45,622 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 16:45:45,907 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 16:45:46,343 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 16:45:46,483 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-05 16:45:46,626 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 16:45:46,880 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 16:45:47,144 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 16:45:47,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:45:47,276 INFO L93 Difference]: Finished difference Result 3759 states and 11877 transitions. [2021-06-05 16:45:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:45:47,277 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:45:47,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:45:47,282 INFO L225 Difference]: With dead ends: 3759 [2021-06-05 16:45:47,282 INFO L226 Difference]: Without dead ends: 3702 [2021-06-05 16:45:47,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3268.9ms TimeCoverageRelationStatistics Valid=575, Invalid=2395, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:45:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2021-06-05 16:45:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1786. [2021-06-05 16:45:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 3.3871148459383753) internal successors, (6046), 1785 states have internal predecessors, (6046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6046 transitions. [2021-06-05 16:45:47,317 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6046 transitions. Word has length 26 [2021-06-05 16:45:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:45:47,317 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 6046 transitions. [2021-06-05 16:45:47,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6046 transitions. [2021-06-05 16:45:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:45:47,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:45:47,320 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:45:47,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1645,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:47,520 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:45:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:45:47,521 INFO L82 PathProgramCache]: Analyzing trace with hash -513521361, now seen corresponding path program 30 times [2021-06-05 16:45:47,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:45:47,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589093249] [2021-06-05 16:45:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:45:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:45:47,950 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 52 [2021-06-05 16:45:48,161 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 16:45:48,370 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-06-05 16:45:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:48,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:45:48,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589093249] [2021-06-05 16:45:48,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589093249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:48,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265302800] [2021-06-05 16:45:48,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:45:48,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:45:48,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:45:48,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:45:48,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:45:49,232 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 16:45:49,528 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2021-06-05 16:45:49,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:49,917 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 1 [2021-06-05 16:45:49,917 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:45:49,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 1 [2021-06-05 16:45:49,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:49,953 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 16:45:49,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 68 [2021-06-05 16:45:49,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:50,507 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 179 [2021-06-05 16:45:50,507 INFO L628 ElimStorePlain]: treesize reduction 697, result has 46.5 percent of original size [2021-06-05 16:45:50,533 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:45:50,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-06-05 16:45:50,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:50,718 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 16:45:50,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:50,744 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:45:50,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 50 [2021-06-05 16:45:50,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:50,923 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 16:45:50,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:50,957 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-06-05 16:45:50,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 74 [2021-06-05 16:45:50,959 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:51,136 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 16:45:51,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:51,164 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:45:51,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-06-05 16:45:51,168 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:51,334 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 16:45:51,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:51,364 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 16:45:51,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 67 [2021-06-05 16:45:51,366 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:51,524 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 16:45:51,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:51,545 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:45:51,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-06-05 16:45:51,547 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:51,706 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 16:45:51,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:51,735 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-05 16:45:51,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 62 [2021-06-05 16:45:51,739 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:51,896 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 16:45:51,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:51,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:45:51,911 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1441, output treesize:516 [2021-06-05 16:45:52,161 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-05 16:45:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:45:52,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265302800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:45:52,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:45:52,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:45:52,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548808233] [2021-06-05 16:45:52,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:45:52,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:45:52,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:45:52,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:45:52,265 INFO L87 Difference]: Start difference. First operand 1786 states and 6046 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:45:52,485 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 39 [2021-06-05 16:45:52,870 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2021-06-05 16:45:53,224 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2021-06-05 16:45:53,704 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-05 16:45:54,141 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 16:45:54,502 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 16:45:54,798 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:45:55,143 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-06-05 16:45:55,795 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 126 [2021-06-05 16:45:57,082 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 241 DAG size of output: 229 [2021-06-05 16:45:57,726 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 152 [2021-06-05 16:45:58,677 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 160 [2021-06-05 16:46:00,380 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 286 DAG size of output: 266 [2021-06-05 16:46:01,812 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 262 DAG size of output: 240 [2021-06-05 16:46:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:02,765 INFO L93 Difference]: Finished difference Result 2363 states and 7775 transitions. [2021-06-05 16:46:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:46:02,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:02,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:02,769 INFO L225 Difference]: With dead ends: 2363 [2021-06-05 16:46:02,769 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 16:46:02,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 10425.1ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:46:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 16:46:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1795. [2021-06-05 16:46:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-06-05 16:46:02,790 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-06-05 16:46:02,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:02,790 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-06-05 16:46:02,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:02,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-06-05 16:46:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:02,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:02,792 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:02,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1768 [2021-06-05 16:46:02,993 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:02,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:02,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2131054141, now seen corresponding path program 31 times [2021-06-05 16:46:02,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:02,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514738715] [2021-06-05 16:46:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:03,315 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-06-05 16:46:03,467 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 16:46:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:03,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:03,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514738715] [2021-06-05 16:46:03,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514738715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:03,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321992412] [2021-06-05 16:46:03,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:03,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:46:03,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:04,075 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 16:46:04,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:04,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:04,209 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:46:04,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 1 [2021-06-05 16:46:04,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:04,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:04,242 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:46:04,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 60 [2021-06-05 16:46:04,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:04,724 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 177 [2021-06-05 16:46:04,725 INFO L628 ElimStorePlain]: treesize reduction 703, result has 45.7 percent of original size [2021-06-05 16:46:04,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:04,748 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-05 16:46:04,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-05 16:46:04,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:04,902 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 16:46:04,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:04,917 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:46:04,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 16:46:04,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:05,058 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-06-05 16:46:05,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:05,078 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:46:05,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 42 [2021-06-05 16:46:05,080 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:05,349 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2021-06-05 16:46:05,350 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.3 percent of original size [2021-06-05 16:46:05,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:05,376 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:46:05,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-06-05 16:46:05,377 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:05,508 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 16:46:05,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:05,524 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:46:05,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-06-05 16:46:05,526 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:05,653 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 16:46:05,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:05,668 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:46:05,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-06-05 16:46:05,669 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:05,788 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:46:05,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:05,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:05,811 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:46:05,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-06-05 16:46:05,813 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:05,926 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:46:05,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:05,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:46:05,934 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-06-05 16:46:06,101 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-06-05 16:46:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:06,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321992412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:06,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:06,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:46:06,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938124247] [2021-06-05 16:46:06,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:46:06,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:06,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:46:06,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:46:06,200 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:06,486 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-05 16:46:06,671 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-06-05 16:46:06,901 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-06-05 16:46:07,646 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 16:46:07,990 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 16:46:08,480 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2021-06-05 16:46:08,742 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-05 16:46:08,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:08,924 INFO L93 Difference]: Finished difference Result 2510 states and 8287 transitions. [2021-06-05 16:46:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:46:08,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:08,928 INFO L225 Difference]: With dead ends: 2510 [2021-06-05 16:46:08,928 INFO L226 Difference]: Without dead ends: 2491 [2021-06-05 16:46:08,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3260.7ms TimeCoverageRelationStatistics Valid=301, Invalid=1181, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:46:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-05 16:46:08,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1795. [2021-06-05 16:46:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-06-05 16:46:08,953 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-06-05 16:46:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:08,954 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-06-05 16:46:08,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-06-05 16:46:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:08,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:08,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:09,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1811,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:09,157 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:09,157 INFO L82 PathProgramCache]: Analyzing trace with hash 473970251, now seen corresponding path program 32 times [2021-06-05 16:46:09,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:09,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558578667] [2021-06-05 16:46:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:09,478 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 16:46:09,632 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-05 16:46:09,766 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 16:46:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:09,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:09,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558578667] [2021-06-05 16:46:09,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558578667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:09,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914380541] [2021-06-05 16:46:09,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:09,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:46:09,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:09,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:46:09,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:10,369 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_238], 3=[v_prenex_239, A, v_prenex_237]} [2021-06-05 16:46:10,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:10,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 16:46:10,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:10,402 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:46:10,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:46:10,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:10,579 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:46:10,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:10,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:10,606 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:46:10,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 71 [2021-06-05 16:46:10,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:10,625 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:46:10,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 58 [2021-06-05 16:46:10,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:10,939 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-06-05 16:46:10,940 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.3 percent of original size [2021-06-05 16:46:10,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:10,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:10,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 57 [2021-06-05 16:46:10,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:10,996 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:46:10,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 16:46:10,999 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:11,280 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-06-05 16:46:11,280 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.4 percent of original size [2021-06-05 16:46:11,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:11,302 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:46:11,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 49 [2021-06-05 16:46:11,304 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:11,323 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:46:11,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-05 16:46:11,325 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:11,542 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 16:46:11,543 INFO L628 ElimStorePlain]: treesize reduction 39, result has 85.0 percent of original size [2021-06-05 16:46:11,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:46:11,553 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:641, output treesize:342 [2021-06-05 16:46:11,740 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-06-05 16:46:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:11,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914380541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:11,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:11,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:46:11,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161595444] [2021-06-05 16:46:11,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:46:11,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:11,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:46:11,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:46:11,927 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:12,140 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 30 [2021-06-05 16:46:12,440 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 16:46:12,902 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 16:46:13,092 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 64 [2021-06-05 16:46:13,317 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 16:46:13,450 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2021-06-05 16:46:13,730 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2021-06-05 16:46:13,903 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-05 16:46:14,279 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 16:46:14,559 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-06-05 16:46:14,803 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 16:46:14,968 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-05 16:46:15,610 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-06-05 16:46:15,942 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-06-05 16:46:16,570 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-06-05 16:46:17,228 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2021-06-05 16:46:17,832 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 95 [2021-06-05 16:46:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:18,242 INFO L93 Difference]: Finished difference Result 2613 states and 8461 transitions. [2021-06-05 16:46:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:46:18,242 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:18,245 INFO L225 Difference]: With dead ends: 2613 [2021-06-05 16:46:18,245 INFO L226 Difference]: Without dead ends: 2544 [2021-06-05 16:46:18,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 6730.9ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:46:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-06-05 16:46:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1779. [2021-06-05 16:46:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 3.3830146231721034) internal successors, (6015), 1778 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 6015 transitions. [2021-06-05 16:46:18,270 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 6015 transitions. Word has length 26 [2021-06-05 16:46:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:18,270 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 6015 transitions. [2021-06-05 16:46:18,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 6015 transitions. [2021-06-05 16:46:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:18,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:18,272 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:18,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1845,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:18,472 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash -923228447, now seen corresponding path program 48 times [2021-06-05 16:46:18,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:18,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838298304] [2021-06-05 16:46:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:18,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:18,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838298304] [2021-06-05 16:46:18,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838298304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:18,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226413554] [2021-06-05 16:46:18,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:18,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:46:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:18,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:46:18,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:19,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-06-05 16:46:19,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:46:19,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-06-05 16:46:19,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-06-05 16:46:19,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-06-05 16:46:19,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 16:46:19,464 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-06-05 16:46:19,475 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 16:46:19,486 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-06-05 16:46:19,496 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-06-05 16:46:19,508 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-06-05 16:46:19,523 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 16:46:19,533 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-05 16:46:19,542 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-06-05 16:46:19,552 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:46:19,561 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:19,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:19,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 16:46:19,567 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:19,647 INFO L628 ElimStorePlain]: treesize reduction 327, result has 11.6 percent of original size [2021-06-05 16:46:19,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:46:19,649 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1045, output treesize:31 [2021-06-05 16:46:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:19,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226413554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:19,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:19,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:46:19,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394969812] [2021-06-05 16:46:19,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:46:19,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:19,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:46:19,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:46:19,685 INFO L87 Difference]: Start difference. First operand 1779 states and 6015 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:21,184 INFO L93 Difference]: Finished difference Result 2238 states and 7371 transitions. [2021-06-05 16:46:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:46:21,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:21,187 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 16:46:21,187 INFO L226 Difference]: Without dead ends: 2216 [2021-06-05 16:46:21,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1550.7ms TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:46:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-06-05 16:46:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1764. [2021-06-05 16:46:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-06-05 16:46:21,206 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-06-05 16:46:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:21,206 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-06-05 16:46:21,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:21,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-06-05 16:46:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:21,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:21,209 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:21,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1872 [2021-06-05 16:46:21,411 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:21,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2265419, now seen corresponding path program 49 times [2021-06-05 16:46:21,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:21,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132678007] [2021-06-05 16:46:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:21,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:21,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132678007] [2021-06-05 16:46:21,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132678007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:21,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201962163] [2021-06-05 16:46:21,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:21,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:46:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:22,327 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 16:46:22,380 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_240], 5=[v_prenex_242, v_prenex_244]} [2021-06-05 16:46:22,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:22,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:22,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:22,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:46:22,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:22,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:22,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:22,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:22,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:46:22,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:22,527 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 16:46:22,528 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-06-05 16:46:22,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:22,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:22,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:22,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 16:46:22,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:22,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:22,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:22,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:22,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-06-05 16:46:22,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:22,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:22,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:22,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:22,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:46:22,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 24 [2021-06-05 16:46:22,630 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:22,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:22,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:46:22,678 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-06-05 16:46:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:22,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201962163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:22,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:22,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:46:22,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011765151] [2021-06-05 16:46:22,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:46:22,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:22,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:46:22,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:46:22,739 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:23,809 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2021-06-05 16:46:24,344 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 45 [2021-06-05 16:46:24,668 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 16:46:24,986 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-06-05 16:46:25,142 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2021-06-05 16:46:25,289 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2021-06-05 16:46:25,601 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 16:46:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:25,793 INFO L93 Difference]: Finished difference Result 2440 states and 8027 transitions. [2021-06-05 16:46:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:46:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:25,796 INFO L225 Difference]: With dead ends: 2440 [2021-06-05 16:46:25,797 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 16:46:25,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 3154.8ms TimeCoverageRelationStatistics Valid=496, Invalid=2054, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:46:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 16:46:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1764. [2021-06-05 16:46:25,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-06-05 16:46:25,828 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-06-05 16:46:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:25,828 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-06-05 16:46:25,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-06-05 16:46:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:25,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:25,830 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:26,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1978,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:26,031 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:26,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1175639121, now seen corresponding path program 50 times [2021-06-05 16:46:26,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:26,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570317914] [2021-06-05 16:46:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:26,436 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 16:46:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:26,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:26,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570317914] [2021-06-05 16:46:26,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570317914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:26,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147321452] [2021-06-05 16:46:26,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:26,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:46:26,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:26,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:46:26,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:26,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:26,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:26,907 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-05 16:46:26,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 37 [2021-06-05 16:46:26,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:26,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:26,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:26,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:26,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-06-05 16:46:26,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:26,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:26,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:26,970 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:46:26,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 41 [2021-06-05 16:46:26,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:26,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:26,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:26,999 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-05 16:46:26,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-06-05 16:46:27,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,027 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:46:27,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 16:46:27,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,046 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:46:27,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 16:46:27,047 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,081 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-05 16:46:27,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 46 [2021-06-05 16:46:27,084 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,099 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:46:27,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:46:27,101 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,117 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:46:27,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:46:27,117 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,132 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:46:27,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:46:27,134 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,163 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:46:27,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:46:27,165 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,180 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:46:27,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 16:46:27,181 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,196 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:46:27,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:46:27,197 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,213 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:46:27,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:46:27,213 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,229 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:46:27,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 16:46:27,229 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:46:27,246 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 16:46:27,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2021-06-05 16:46:27,247 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:27,315 INFO L628 ElimStorePlain]: treesize reduction 145, result has 27.5 percent of original size [2021-06-05 16:46:27,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:46:27,316 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:55 [2021-06-05 16:46:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:27,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147321452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:27,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:27,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-05 16:46:27,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484225910] [2021-06-05 16:46:27,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:46:27,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:27,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:46:27,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:46:27,418 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:29,005 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 16:46:29,176 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-05 16:46:29,317 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-05 16:46:29,486 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 16:46:30,087 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:46:30,392 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-06-05 16:46:30,645 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 16:46:31,370 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 16:46:31,885 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 16:46:32,391 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-05 16:46:32,527 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-05 16:46:32,670 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 16:46:32,814 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 16:46:33,041 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 16:46:33,488 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 16:46:33,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:46:33,881 INFO L93 Difference]: Finished difference Result 3056 states and 9811 transitions. [2021-06-05 16:46:33,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 16:46:33,881 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:46:33,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:46:33,885 INFO L225 Difference]: With dead ends: 3056 [2021-06-05 16:46:33,885 INFO L226 Difference]: Without dead ends: 3009 [2021-06-05 16:46:33,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 6189.9ms TimeCoverageRelationStatistics Valid=1062, Invalid=5580, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 16:46:33,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-06-05 16:46:33,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1784. [2021-06-05 16:46:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.37633202467751) internal successors, (6020), 1783 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 6020 transitions. [2021-06-05 16:46:33,912 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 6020 transitions. Word has length 26 [2021-06-05 16:46:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:46:33,912 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 6020 transitions. [2021-06-05 16:46:33,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 6020 transitions. [2021-06-05 16:46:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:46:33,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:46:33,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:46:34,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1992 [2021-06-05 16:46:34,115 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:46:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:46:34,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1573091019, now seen corresponding path program 51 times [2021-06-05 16:46:34,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:46:34,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811993786] [2021-06-05 16:46:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:46:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:46:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:34,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:46:34,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811993786] [2021-06-05 16:46:34,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811993786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:34,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102886191] [2021-06-05 16:46:34,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:46:34,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:46:34,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:46:34,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:46:34,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:46:35,342 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 16:46:35,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:35,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 66 [2021-06-05 16:46:35,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:46:35,845 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-05 16:46:35,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2021-06-05 16:46:35,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:37,041 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 201 DAG size of output: 180 [2021-06-05 16:46:37,041 INFO L628 ElimStorePlain]: treesize reduction 96, result has 91.8 percent of original size [2021-06-05 16:46:37,113 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 16:46:37,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2021-06-05 16:46:37,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:37,174 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-06-05 16:46:37,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 44 [2021-06-05 16:46:37,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:38,338 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 181 DAG size of output: 174 [2021-06-05 16:46:38,339 INFO L628 ElimStorePlain]: treesize reduction 21, result has 98.0 percent of original size [2021-06-05 16:46:38,410 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:46:38,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-06-05 16:46:38,437 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:38,488 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-06-05 16:46:38,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 41 [2021-06-05 16:46:38,489 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:39,779 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 200 DAG size of output: 187 [2021-06-05 16:46:39,780 INFO L628 ElimStorePlain]: treesize reduction 66, result has 94.1 percent of original size [2021-06-05 16:46:39,846 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 16:46:39,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 54 [2021-06-05 16:46:39,859 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:39,927 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:46:39,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-06-05 16:46:39,953 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:41,270 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 207 DAG size of output: 184 [2021-06-05 16:46:41,271 INFO L628 ElimStorePlain]: treesize reduction 163, result has 86.3 percent of original size [2021-06-05 16:46:41,345 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:46:41,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-06-05 16:46:41,358 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:41,421 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-06-05 16:46:41,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 52 [2021-06-05 16:46:41,427 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:43,409 WARN L205 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 202 DAG size of output: 192 [2021-06-05 16:46:43,409 INFO L628 ElimStorePlain]: treesize reduction 53, result has 95.1 percent of original size [2021-06-05 16:46:43,480 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-05 16:46:43,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2021-06-05 16:46:43,493 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:43,560 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:46:43,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 65 [2021-06-05 16:46:43,614 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:45,518 WARN L205 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 220 DAG size of output: 180 [2021-06-05 16:46:45,519 INFO L628 ElimStorePlain]: treesize reduction 304, result has 75.8 percent of original size [2021-06-05 16:46:45,593 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:46:45,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-06-05 16:46:45,629 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:45,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:46:45,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 80 [2021-06-05 16:46:45,778 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:47,283 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 279 DAG size of output: 208 [2021-06-05 16:46:47,283 INFO L628 ElimStorePlain]: treesize reduction 459, result has 68.3 percent of original size [2021-06-05 16:46:47,358 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 16:46:47,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2021-06-05 16:46:47,363 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:47,415 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-06-05 16:46:47,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 49 [2021-06-05 16:46:47,421 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:46:48,704 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 199 DAG size of output: 198 [2021-06-05 16:46:48,705 INFO L628 ElimStorePlain]: treesize reduction 8, result has 99.2 percent of original size [2021-06-05 16:46:49,115 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 261 [2021-06-05 16:46:49,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-06-05 16:46:49,118 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:1105, output treesize:5253 [2021-06-05 16:46:49,227 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 261 [2021-06-05 16:46:50,687 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 258 DAG size of output: 107 [2021-06-05 16:46:51,184 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 16:46:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:46:51,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102886191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:46:51,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:46:51,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:46:51,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272290198] [2021-06-05 16:46:51,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:46:51,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:46:51,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:46:51,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:46:51,496 INFO L87 Difference]: Start difference. First operand 1784 states and 6020 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:46:51,986 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 36 [2021-06-05 16:46:52,293 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-05 16:46:52,605 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 16:46:53,400 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 62 [2021-06-05 16:46:53,551 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 16:46:54,340 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-06-05 16:46:55,109 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 72 [2021-06-05 16:46:55,415 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2021-06-05 16:46:56,082 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 63 [2021-06-05 16:46:56,275 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 37 [2021-06-05 16:46:56,741 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-05 16:46:57,292 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-06-05 16:46:57,756 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 16:46:58,697 WARN L205 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 109 [2021-06-05 16:46:59,046 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2021-06-05 16:46:59,708 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 84 [2021-06-05 16:46:59,982 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 40 [2021-06-05 16:47:00,257 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 48 [2021-06-05 16:47:00,866 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 75 [2021-06-05 16:47:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:00,931 INFO L93 Difference]: Finished difference Result 2817 states and 9172 transitions. [2021-06-05 16:47:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:47:00,932 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:00,936 INFO L225 Difference]: With dead ends: 2817 [2021-06-05 16:47:00,936 INFO L226 Difference]: Without dead ends: 2787 [2021-06-05 16:47:00,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 11164.9ms TimeCoverageRelationStatistics Valid=559, Invalid=2981, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:47:00,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-05 16:47:00,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1785. [2021-06-05 16:47:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-06-05 16:47:00,960 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-06-05 16:47:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:00,960 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-06-05 16:47:00,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-06-05 16:47:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:00,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:00,963 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:01,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:01,163 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash 238696335, now seen corresponding path program 52 times [2021-06-05 16:47:01,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:01,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158333582] [2021-06-05 16:47:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:01,499 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-05 16:47:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:01,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:01,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158333582] [2021-06-05 16:47:01,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158333582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:01,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909641900] [2021-06-05 16:47:01,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:01,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:47:01,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:01,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:47:01,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:02,095 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 16:47:02,319 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_271, v_prenex_269], 6=[A, v_prenex_273]} [2021-06-05 16:47:02,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:02,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:02,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:02,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-06-05 16:47:02,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:02,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:02,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:02,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-06-05 16:47:02,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:02,525 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 16:47:02,525 INFO L628 ElimStorePlain]: treesize reduction 220, result has 44.2 percent of original size [2021-06-05 16:47:02,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:02,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 16:47:02,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:02,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:02,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:02,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:02,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:02,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 16:47:02,605 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:02,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:02,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:02,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:02,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:02,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 30 [2021-06-05 16:47:02,669 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:02,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:02,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:47:02,717 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:485, output treesize:67 [2021-06-05 16:47:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:02,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909641900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:02,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:02,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:47:02,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882811509] [2021-06-05 16:47:02,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:47:02,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:02,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:47:02,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:47:02,786 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:03,771 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-05 16:47:04,053 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 16:47:04,225 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 16:47:04,586 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-06-05 16:47:04,847 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2021-06-05 16:47:05,051 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-05 16:47:05,614 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-05 16:47:05,847 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-05 16:47:06,139 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-05 16:47:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:06,166 INFO L93 Difference]: Finished difference Result 2300 states and 7575 transitions. [2021-06-05 16:47:06,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:47:06,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:06,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:06,170 INFO L225 Difference]: With dead ends: 2300 [2021-06-05 16:47:06,170 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 16:47:06,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 3651.2ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:47:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 16:47:06,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1783. [2021-06-05 16:47:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.377665544332211) internal successors, (6019), 1782 states have internal predecessors, (6019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6019 transitions. [2021-06-05 16:47:06,191 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6019 transitions. Word has length 26 [2021-06-05 16:47:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:06,191 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6019 transitions. [2021-06-05 16:47:06,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:06,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6019 transitions. [2021-06-05 16:47:06,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:06,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:06,193 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:06,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2289 [2021-06-05 16:47:06,394 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:06,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:06,394 INFO L82 PathProgramCache]: Analyzing trace with hash -169937649, now seen corresponding path program 53 times [2021-06-05 16:47:06,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:06,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222159629] [2021-06-05 16:47:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:06,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:06,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222159629] [2021-06-05 16:47:06,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222159629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:06,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438198781] [2021-06-05 16:47:06,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:06,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:47:06,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:06,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:47:06,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:07,337 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 16:47:07,629 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 16:47:07,910 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_282, v_prenex_284, v_prenex_285, v_prenex_286, v_prenex_287, v_prenex_288], 6=[v_prenex_283]} [2021-06-05 16:47:07,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:07,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:07,962 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:47:07,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:47:07,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:07,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:08,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:08,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 46 [2021-06-05 16:47:08,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 16:47:09,112 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 201 DAG size of output: 192 [2021-06-05 16:47:09,113 INFO L628 ElimStorePlain]: treesize reduction 32, result has 97.5 percent of original size [2021-06-05 16:47:09,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:09,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:09,153 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:47:09,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 36 [2021-06-05 16:47:09,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:09,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:09,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:09,190 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:47:09,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 41 [2021-06-05 16:47:09,195 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:10,102 WARN L205 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 178 [2021-06-05 16:47:10,103 INFO L628 ElimStorePlain]: treesize reduction 50, result has 95.8 percent of original size [2021-06-05 16:47:10,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:10,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:10,147 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:47:10,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-06-05 16:47:10,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:10,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:10,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:10,186 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:47:10,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 41 [2021-06-05 16:47:10,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:11,016 WARN L205 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 166 [2021-06-05 16:47:11,017 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.6 percent of original size [2021-06-05 16:47:11,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:11,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:11,053 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:47:11,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 37 [2021-06-05 16:47:11,054 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:11,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:11,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:11,089 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:47:11,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 44 [2021-06-05 16:47:11,092 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:11,796 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 154 [2021-06-05 16:47:11,797 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.2 percent of original size [2021-06-05 16:47:11,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:11,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:11,833 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:47:11,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 16:47:11,836 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:11,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:11,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:11,871 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:47:11,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 16:47:11,874 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,232 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 16:47:12,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:12,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:12,268 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:47:12,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 16:47:12,271 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:12,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:12,287 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:47:12,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:47:12,288 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,835 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 131 [2021-06-05 16:47:12,835 INFO L628 ElimStorePlain]: treesize reduction 10, result has 98.7 percent of original size [2021-06-05 16:47:12,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:12,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:12,866 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:47:12,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 32 [2021-06-05 16:47:12,867 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:12,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:12,893 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:47:12,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-06-05 16:47:12,896 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:13,360 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 118 [2021-06-05 16:47:13,361 INFO L628 ElimStorePlain]: treesize reduction 37, result has 94.9 percent of original size [2021-06-05 16:47:13,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:13,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:13,405 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-06-05 16:47:13,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 176 treesize of output 104 [2021-06-05 16:47:13,416 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:13,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:13,429 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:47:13,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 1 [2021-06-05 16:47:13,430 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:13,829 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2021-06-05 16:47:13,830 INFO L628 ElimStorePlain]: treesize reduction 68, result has 85.0 percent of original size [2021-06-05 16:47:13,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:47:13,840 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1282, output treesize:291 [2021-06-05 16:47:13,982 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-06-05 16:47:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:14,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438198781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:14,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:14,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 16:47:14,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528560724] [2021-06-05 16:47:14,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:47:14,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:14,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:47:14,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:47:14,037 INFO L87 Difference]: Start difference. First operand 1783 states and 6019 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:16,123 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 16:47:22,301 WARN L205 SmtUtils]: Spent 5.97 s on a formula simplification. DAG size of input: 209 DAG size of output: 150 [2021-06-05 16:47:22,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:22,652 INFO L93 Difference]: Finished difference Result 2524 states and 8353 transitions. [2021-06-05 16:47:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:47:22,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:22,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:22,656 INFO L225 Difference]: With dead ends: 2524 [2021-06-05 16:47:22,656 INFO L226 Difference]: Without dead ends: 2509 [2021-06-05 16:47:22,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 8819.6ms TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:47:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-06-05 16:47:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1785. [2021-06-05 16:47:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-06-05 16:47:22,676 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-06-05 16:47:22,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:22,677 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-06-05 16:47:22,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-06-05 16:47:22,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:22,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:22,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:22,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2303,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:22,879 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:22,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:22,879 INFO L82 PathProgramCache]: Analyzing trace with hash 597949447, now seen corresponding path program 54 times [2021-06-05 16:47:22,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:22,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484501612] [2021-06-05 16:47:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:23,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:23,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484501612] [2021-06-05 16:47:23,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484501612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:23,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684449241] [2021-06-05 16:47:23,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:23,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:47:23,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:47:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:23,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,704 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:47:23,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 16:47:23,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:23,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-06-05 16:47:23,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,759 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:47:23,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,778 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 16:47:23,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,795 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:47:23,796 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,813 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:47:23,813 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,831 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 16:47:23,832 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,849 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:47:23,849 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,866 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:47:23,867 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,885 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 16:47:23,885 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,900 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:47:23,902 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,917 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:47:23,919 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,935 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 16:47:23,936 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,952 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:47:23,952 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,966 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:47:23,968 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:23,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:23,977 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:47:23,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 16:47:23,978 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:24,010 INFO L628 ElimStorePlain]: treesize reduction 64, result has 29.7 percent of original size [2021-06-05 16:47:24,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:47:24,011 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:27 [2021-06-05 16:47:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:24,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684449241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:24,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:24,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-05 16:47:24,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563312886] [2021-06-05 16:47:24,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:47:24,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:24,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:47:24,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:47:24,081 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:25,385 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-06-05 16:47:25,787 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2021-06-05 16:47:25,949 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2021-06-05 16:47:26,395 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 16:47:26,721 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 16:47:26,909 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 16:47:27,132 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 16:47:27,423 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-06-05 16:47:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:28,023 INFO L93 Difference]: Finished difference Result 2886 states and 9372 transitions. [2021-06-05 16:47:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:47:28,024 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:28,027 INFO L225 Difference]: With dead ends: 2886 [2021-06-05 16:47:28,027 INFO L226 Difference]: Without dead ends: 2841 [2021-06-05 16:47:28,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 3845.1ms TimeCoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:47:28,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-06-05 16:47:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1790. [2021-06-05 16:47:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 3.377864728898826) internal successors, (6043), 1789 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 6043 transitions. [2021-06-05 16:47:28,052 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 6043 transitions. Word has length 26 [2021-06-05 16:47:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:28,052 INFO L482 AbstractCegarLoop]: Abstraction has 1790 states and 6043 transitions. [2021-06-05 16:47:28,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 6043 transitions. [2021-06-05 16:47:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:28,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:28,054 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:28,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2369 [2021-06-05 16:47:28,257 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1153824785, now seen corresponding path program 33 times [2021-06-05 16:47:28,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:28,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617473001] [2021-06-05 16:47:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:28,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:28,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617473001] [2021-06-05 16:47:28,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617473001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:28,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787017249] [2021-06-05 16:47:28,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:28,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:47:28,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:47:28,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:29,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:29,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:29,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:29,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:47:29,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:29,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:29,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:29,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:29,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:29,492 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-05 16:47:29,492 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-06-05 16:47:29,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:29,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:29,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:29,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:47:29,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:29,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:29,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:29,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:29,507 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:29,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:29,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:29,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:47:29,581 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:29,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:29,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:29,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:29,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:47:29,652 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:29,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:29,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:47:29,714 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-06-05 16:47:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:29,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787017249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:29,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:29,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:47:29,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110308318] [2021-06-05 16:47:29,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:47:29,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:29,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:47:29,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:47:29,787 INFO L87 Difference]: Start difference. First operand 1790 states and 6043 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:30,770 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-06-05 16:47:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:31,050 INFO L93 Difference]: Finished difference Result 2197 states and 7293 transitions. [2021-06-05 16:47:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:47:31,050 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:31,053 INFO L225 Difference]: With dead ends: 2197 [2021-06-05 16:47:31,053 INFO L226 Difference]: Without dead ends: 2182 [2021-06-05 16:47:31,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1583.8ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:47:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-06-05 16:47:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1782. [2021-06-05 16:47:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-06-05 16:47:31,077 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-06-05 16:47:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:31,077 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-06-05 16:47:31,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-06-05 16:47:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:31,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:31,080 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:31,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2395,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:31,297 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash -824665213, now seen corresponding path program 34 times [2021-06-05 16:47:31,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:31,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662789171] [2021-06-05 16:47:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:31,597 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-06-05 16:47:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:31,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:31,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662789171] [2021-06-05 16:47:31,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662789171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:31,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636765741] [2021-06-05 16:47:31,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:31,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:47:31,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:31,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:47:31,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:32,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,183 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:32,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 16:47:32,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,194 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:32,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 16:47:32,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,210 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:47:32,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-06-05 16:47:32,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,222 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:32,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 16:47:32,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,233 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:32,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 16:47:32,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,247 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:32,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:47:32,247 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,258 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:32,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 16:47:32,259 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,269 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:32,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 16:47:32,270 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,282 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:32,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 1 [2021-06-05 16:47:32,283 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,293 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:32,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 16:47:32,294 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,308 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:47:32,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 52 [2021-06-05 16:47:32,309 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,324 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:47:32,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 60 [2021-06-05 16:47:32,325 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,341 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:47:32,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 45 [2021-06-05 16:47:32,342 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,353 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:32,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 16:47:32,354 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:32,365 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:32,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 1 [2021-06-05 16:47:32,366 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,375 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 16:47:32,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 60 [2021-06-05 16:47:32,376 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:32,447 INFO L628 ElimStorePlain]: treesize reduction 47, result has 63.6 percent of original size [2021-06-05 16:47:32,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:47:32,449 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1445, output treesize:46 [2021-06-05 16:47:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:32,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636765741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:32,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:32,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:47:32,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886956022] [2021-06-05 16:47:32,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:47:32,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:32,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:47:32,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:47:32,493 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:33,274 INFO L93 Difference]: Finished difference Result 1968 states and 6539 transitions. [2021-06-05 16:47:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:47:33,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:33,277 INFO L225 Difference]: With dead ends: 1968 [2021-06-05 16:47:33,277 INFO L226 Difference]: Without dead ends: 1953 [2021-06-05 16:47:33,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1259.8ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:47:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-05 16:47:33,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1791. [2021-06-05 16:47:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.3843575418994414) internal successors, (6058), 1790 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6058 transitions. [2021-06-05 16:47:33,307 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6058 transitions. Word has length 26 [2021-06-05 16:47:33,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:33,307 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6058 transitions. [2021-06-05 16:47:33,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6058 transitions. [2021-06-05 16:47:33,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:33,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:33,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:33,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2415,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:33,533 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash -992474305, now seen corresponding path program 35 times [2021-06-05 16:47:33,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:33,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246322379] [2021-06-05 16:47:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:33,754 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-06-05 16:47:33,874 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 16:47:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:34,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:34,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246322379] [2021-06-05 16:47:34,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246322379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:34,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313010017] [2021-06-05 16:47:34,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:34,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:47:34,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:47:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:34,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:47:34,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:47:34,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:47:34,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:47:34,517 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:34,523 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:34,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:34,536 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-06-05 16:47:34,542 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:47:34,549 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:47:34,555 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-06-05 16:47:34,561 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:47:34,567 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:34,574 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:34,580 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:47:34,587 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:34,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:34,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:34,591 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:34,660 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-05 16:47:34,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:47:34,662 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-05 16:47:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:34,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313010017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:34,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:34,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:47:34,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993727843] [2021-06-05 16:47:34,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:47:34,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:34,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:47:34,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:47:34,714 INFO L87 Difference]: Start difference. First operand 1791 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:35,175 INFO L93 Difference]: Finished difference Result 2115 states and 7050 transitions. [2021-06-05 16:47:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:47:35,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:35,179 INFO L225 Difference]: With dead ends: 2115 [2021-06-05 16:47:35,179 INFO L226 Difference]: Without dead ends: 2100 [2021-06-05 16:47:35,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 947.9ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:47:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-06-05 16:47:35,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1785. [2021-06-05 16:47:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.383968609865471) internal successors, (6037), 1784 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6037 transitions. [2021-06-05 16:47:35,199 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6037 transitions. Word has length 26 [2021-06-05 16:47:35,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:35,199 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6037 transitions. [2021-06-05 16:47:35,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6037 transitions. [2021-06-05 16:47:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:35,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:35,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:35,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2420,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:35,402 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1234976963, now seen corresponding path program 36 times [2021-06-05 16:47:35,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:35,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163134995] [2021-06-05 16:47:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:35,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:35,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163134995] [2021-06-05 16:47:35,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163134995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:35,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267347877] [2021-06-05 16:47:35,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:35,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:47:35,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:35,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:47:35,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:36,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:36,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:47:36,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,184 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:36,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:47:36,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,194 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:36,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:47:36,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,205 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:36,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:36,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,215 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:36,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:47:36,216 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,229 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:47:36,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 16:47:36,230 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:36,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:47:36,244 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,255 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:36,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:36,255 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:36,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:47:36,271 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,282 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:36,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:47:36,283 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,293 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:36,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:47:36,295 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:36,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:47:36,310 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,320 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:36,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:47:36,321 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,332 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:36,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:36,333 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,342 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:36,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:36,343 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:36,351 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:36,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:47:36,351 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:36,485 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-05 16:47:36,485 INFO L628 ElimStorePlain]: treesize reduction 92, result has 50.8 percent of original size [2021-06-05 16:47:36,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:47:36,488 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-06-05 16:47:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:36,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267347877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:36,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:36,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:47:36,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898753789] [2021-06-05 16:47:36,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:47:36,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:36,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:47:36,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:47:36,619 INFO L87 Difference]: Start difference. First operand 1785 states and 6037 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:36,889 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 16:47:37,231 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-05 16:47:37,743 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-05 16:47:37,920 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2021-06-05 16:47:38,269 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-05 16:47:38,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:38,433 INFO L93 Difference]: Finished difference Result 2622 states and 8655 transitions. [2021-06-05 16:47:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:47:38,434 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:38,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:38,437 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 16:47:38,437 INFO L226 Difference]: Without dead ends: 2607 [2021-06-05 16:47:38,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2024.4ms TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:47:38,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-06-05 16:47:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1782. [2021-06-05 16:47:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-06-05 16:47:38,460 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-06-05 16:47:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:38,461 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-06-05 16:47:38,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-06-05 16:47:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:38,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:38,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:38,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2450,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:38,663 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:38,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:38,663 INFO L82 PathProgramCache]: Analyzing trace with hash 649627467, now seen corresponding path program 37 times [2021-06-05 16:47:38,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:38,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488410372] [2021-06-05 16:47:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:39,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:39,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488410372] [2021-06-05 16:47:39,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488410372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:39,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121606374] [2021-06-05 16:47:39,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:39,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:47:39,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:39,385 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 16:47:39,459 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:47:39,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2021-06-05 16:47:39,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:39,623 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 16:47:39,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:39,643 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:47:39,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 49 [2021-06-05 16:47:39,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:39,808 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 16:47:39,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:39,829 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:47:39,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 54 [2021-06-05 16:47:39,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:39,989 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 16:47:39,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:40,010 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:47:40,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 60 [2021-06-05 16:47:40,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:40,168 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 16:47:40,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:40,188 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:47:40,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 55 [2021-06-05 16:47:40,191 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:40,330 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 16:47:40,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:40,348 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:47:40,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 50 [2021-06-05 16:47:40,351 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:40,478 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:47:40,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:40,492 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:47:40,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 49 [2021-06-05 16:47:40,494 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:40,614 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 16:47:40,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:40,629 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:47:40,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 63 [2021-06-05 16:47:40,631 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:40,746 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:47:40,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:40,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:47:40,754 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:665, output treesize:244 [2021-06-05 16:47:40,912 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 16:47:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:40,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121606374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:40,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:40,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:47:40,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398512921] [2021-06-05 16:47:40,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:47:40,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:40,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:47:40,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:47:40,996 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:41,955 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-05 16:47:42,324 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 16:47:42,797 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2021-06-05 16:47:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:42,968 INFO L93 Difference]: Finished difference Result 2302 states and 7609 transitions. [2021-06-05 16:47:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:47:42,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:42,972 INFO L225 Difference]: With dead ends: 2302 [2021-06-05 16:47:42,972 INFO L226 Difference]: Without dead ends: 2287 [2021-06-05 16:47:42,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2412.3ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:47:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-06-05 16:47:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1774. [2021-06-05 16:47:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.3756345177664975) internal successors, (5985), 1773 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 5985 transitions. [2021-06-05 16:47:42,995 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 5985 transitions. Word has length 26 [2021-06-05 16:47:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:42,995 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 5985 transitions. [2021-06-05 16:47:42,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:42,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 5985 transitions. [2021-06-05 16:47:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:42,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:42,998 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:43,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2485 [2021-06-05 16:47:43,221 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:43,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:43,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1956490383, now seen corresponding path program 38 times [2021-06-05 16:47:43,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:43,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238703314] [2021-06-05 16:47:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:43,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:43,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238703314] [2021-06-05 16:47:43,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238703314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:43,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534764167] [2021-06-05 16:47:43,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:43,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:47:43,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:43,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:47:43,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:43,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:43,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:47:43,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:43,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:43,876 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:47:43,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:47:43,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:43,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:43,887 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:43,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:43,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:43,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:43,898 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:43,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:47:43,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:43,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:43,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:43,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:47:43,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:43,924 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:47:43,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:47:43,925 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:43,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:43,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:43,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:47:43,939 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:43,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:43,948 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:43,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:47:43,949 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:43,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:43,960 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:43,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:47:43,961 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:43,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:43,970 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:43,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:43,971 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:43,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:43,980 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:43,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:47:43,982 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:43,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:43,993 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:43,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:43,994 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:43,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:44,004 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:44,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:47:44,005 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:44,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:44,014 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:44,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:44,015 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:44,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:44,024 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:44,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:47:44,025 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:44,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:44,031 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:44,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:47:44,032 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:44,109 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-06-05 16:47:44,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:47:44,110 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 16:47:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:44,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534764167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:44,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:44,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:47:44,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241156800] [2021-06-05 16:47:44,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:47:44,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:44,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:47:44,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:47:44,238 INFO L87 Difference]: Start difference. First operand 1774 states and 5985 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:44,933 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 16:47:45,133 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 16:47:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:45,426 INFO L93 Difference]: Finished difference Result 2052 states and 6733 transitions. [2021-06-05 16:47:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:47:45,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:45,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:45,429 INFO L225 Difference]: With dead ends: 2052 [2021-06-05 16:47:45,429 INFO L226 Difference]: Without dead ends: 2031 [2021-06-05 16:47:45,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1386.7ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:47:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-06-05 16:47:45,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1745. [2021-06-05 16:47:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 3.371559633027523) internal successors, (5880), 1744 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 5880 transitions. [2021-06-05 16:47:45,455 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 5880 transitions. Word has length 26 [2021-06-05 16:47:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:45,455 INFO L482 AbstractCegarLoop]: Abstraction has 1745 states and 5880 transitions. [2021-06-05 16:47:45,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 5880 transitions. [2021-06-05 16:47:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:45,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:45,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:45,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-06-05 16:47:45,665 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:45,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:45,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1231193713, now seen corresponding path program 39 times [2021-06-05 16:47:45,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:45,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188003458] [2021-06-05 16:47:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:46,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:46,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188003458] [2021-06-05 16:47:46,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188003458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:46,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847154968] [2021-06-05 16:47:46,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:46,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:47:46,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:46,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:47:46,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:46,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:46,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:46,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 16:47:46,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:46,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:46,516 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:46,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:47:46,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:46,679 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:47:46,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:46,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:46,703 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:47:46,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:47:46,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:46,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:46,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:46,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 16:47:46,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:46,879 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 16:47:46,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:46,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:46,905 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:46,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:47:46,906 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:46,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:46,925 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:47:46,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 23 [2021-06-05 16:47:46,926 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:47,072 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 16:47:47,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:47,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:47,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:47,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-06-05 16:47:47,094 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:47,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:47,112 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:47:47,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 16:47:47,114 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:47,380 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 16:47:47,381 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.9 percent of original size [2021-06-05 16:47:47,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 16:47:47,414 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:401, output treesize:330 [2021-06-05 16:47:47,587 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 16:47:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:47,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847154968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:47,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:47,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:47:47,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277057598] [2021-06-05 16:47:47,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:47:47,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:47,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:47:47,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:47:47,669 INFO L87 Difference]: Start difference. First operand 1745 states and 5880 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:48,545 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 16:47:48,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:48,775 INFO L93 Difference]: Finished difference Result 1970 states and 6526 transitions. [2021-06-05 16:47:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:47:48,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:48,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:48,778 INFO L225 Difference]: With dead ends: 1970 [2021-06-05 16:47:48,779 INFO L226 Difference]: Without dead ends: 1945 [2021-06-05 16:47:48,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1491.1ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:47:48,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-05 16:47:48,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1724. [2021-06-05 16:47:48,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.3743470690655832) internal successors, (5814), 1723 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5814 transitions. [2021-06-05 16:47:48,800 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5814 transitions. Word has length 26 [2021-06-05 16:47:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:48,800 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 5814 transitions. [2021-06-05 16:47:48,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5814 transitions. [2021-06-05 16:47:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:48,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:48,802 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:49,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2509,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:49,003 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:49,003 INFO L82 PathProgramCache]: Analyzing trace with hash 912205891, now seen corresponding path program 40 times [2021-06-05 16:47:49,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:49,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67995309] [2021-06-05 16:47:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:49,322 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 16:47:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:49,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:49,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67995309] [2021-06-05 16:47:49,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67995309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:49,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145007648] [2021-06-05 16:47:49,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:49,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:47:49,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:49,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:47:49,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:49,903 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 16:47:49,979 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:47:49,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 52 [2021-06-05 16:47:49,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:50,140 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 16:47:50,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:50,171 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:47:50,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 46 [2021-06-05 16:47:50,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:50,331 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 16:47:50,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:50,352 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:47:50,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 50 [2021-06-05 16:47:50,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:50,509 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 16:47:50,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:50,524 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:47:50,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 48 [2021-06-05 16:47:50,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:50,670 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-05 16:47:50,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:50,685 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:47:50,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 16:47:50,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:50,825 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 16:47:50,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:50,843 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:47:50,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 57 [2021-06-05 16:47:50,844 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:50,973 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:47:50,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:50,990 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:47:50,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 47 [2021-06-05 16:47:50,993 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:51,231 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2021-06-05 16:47:51,231 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.5 percent of original size [2021-06-05 16:47:51,246 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:47:51,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 57 [2021-06-05 16:47:51,248 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:51,360 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:47:51,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:51,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:47:51,368 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:641, output treesize:216 [2021-06-05 16:47:51,524 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-06-05 16:47:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:51,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145007648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:51,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:51,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:47:51,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610911041] [2021-06-05 16:47:51,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:47:51,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:51,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:47:51,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:47:51,609 INFO L87 Difference]: Start difference. First operand 1724 states and 5814 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:52,146 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 16:47:52,575 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 16:47:53,056 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 132 [2021-06-05 16:47:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:53,258 INFO L93 Difference]: Finished difference Result 2315 states and 7617 transitions. [2021-06-05 16:47:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:47:53,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:53,262 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 16:47:53,262 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 16:47:53,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2146.7ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:47:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 16:47:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1717. [2021-06-05 16:47:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.374708624708625) internal successors, (5791), 1716 states have internal predecessors, (5791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 5791 transitions. [2021-06-05 16:47:53,286 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 5791 transitions. Word has length 26 [2021-06-05 16:47:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:53,286 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 5791 transitions. [2021-06-05 16:47:53,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:53,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 5791 transitions. [2021-06-05 16:47:53,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:53,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:53,288 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:53,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2561,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:53,488 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:53,488 INFO L82 PathProgramCache]: Analyzing trace with hash -2073779469, now seen corresponding path program 41 times [2021-06-05 16:47:53,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:53,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283075927] [2021-06-05 16:47:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:53,845 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 16:47:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:54,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:54,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283075927] [2021-06-05 16:47:54,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283075927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:54,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584810644] [2021-06-05 16:47:54,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:54,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:47:54,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:54,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:47:54,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:54,517 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 16:47:54,799 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 68 [2021-06-05 16:47:54,883 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_342, v_prenex_343, v_prenex_344], 3=[A]} [2021-06-05 16:47:54,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:54,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:54,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:54,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:47:54,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:54,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:54,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:54,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:54,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:55,051 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 16:47:55,052 INFO L628 ElimStorePlain]: treesize reduction 53, result has 81.4 percent of original size [2021-06-05 16:47:55,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:55,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:55,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:55,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:55,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:55,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:47:55,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:47:55,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:47:55,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:55,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:55,205 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:47:55,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-06-05 16:47:55,206 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:55,217 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-05 16:47:55,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 52 [2021-06-05 16:47:55,218 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:55,299 INFO L628 ElimStorePlain]: treesize reduction 19, result has 81.4 percent of original size [2021-06-05 16:47:55,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:47:55,302 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:333, output treesize:59 [2021-06-05 16:47:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:55,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584810644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:55,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:55,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:47:55,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264247818] [2021-06-05 16:47:55,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:47:55,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:55,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:47:55,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:47:55,378 INFO L87 Difference]: Start difference. First operand 1717 states and 5791 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:56,308 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 16:47:56,861 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:47:57,145 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 84 [2021-06-05 16:47:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:47:57,306 INFO L93 Difference]: Finished difference Result 2241 states and 7399 transitions. [2021-06-05 16:47:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:47:57,307 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:47:57,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:47:57,310 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 16:47:57,310 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 16:47:57,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2515.0ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:47:57,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 16:47:57,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1703. [2021-06-05 16:47:57,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.375440658049354) internal successors, (5745), 1702 states have internal predecessors, (5745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:57,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5745 transitions. [2021-06-05 16:47:57,329 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5745 transitions. Word has length 26 [2021-06-05 16:47:57,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:47:57,329 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5745 transitions. [2021-06-05 16:47:57,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5745 transitions. [2021-06-05 16:47:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:47:57,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:47:57,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:47:57,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2579,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:57,532 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:47:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:47:57,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1720331193, now seen corresponding path program 42 times [2021-06-05 16:47:57,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:47:57,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814572777] [2021-06-05 16:47:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:47:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:47:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:57,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:47:57,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814572777] [2021-06-05 16:47:57,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814572777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:57,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740187666] [2021-06-05 16:47:57,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:47:57,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:47:57,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:47:57,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:47:57,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:47:58,311 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:58,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:47:58,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,335 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:58,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:47:58,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:47:58,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-05 16:47:58,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,369 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:58,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:47:58,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,381 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:58,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:47:58,382 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,392 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:58,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:47:58,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,403 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:58,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:47:58,404 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,415 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:58,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:58,416 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,426 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:58,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:47:58,427 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,449 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:58,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:47:58,451 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,462 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:58,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:47:58,463 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,473 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:58,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:47:58,474 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,484 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:58,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:47:58,486 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,496 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:58,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:47:58,497 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,518 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:47:58,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 16:47:58,519 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,526 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:47:58,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:47:58,527 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:47:58,717 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-06-05 16:47:58,718 INFO L628 ElimStorePlain]: treesize reduction 68, result has 67.1 percent of original size [2021-06-05 16:47:58,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:47:58,724 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:161 [2021-06-05 16:47:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:47:58,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740187666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:47:58,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:47:58,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:47:58,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781768409] [2021-06-05 16:47:58,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:47:58,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:47:58,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:47:58,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:47:58,870 INFO L87 Difference]: Start difference. First operand 1703 states and 5745 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:47:59,624 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-05 16:47:59,905 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 16:48:00,067 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 16:48:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:00,425 INFO L93 Difference]: Finished difference Result 2062 states and 6748 transitions. [2021-06-05 16:48:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:48:00,425 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:00,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:00,428 INFO L225 Difference]: With dead ends: 2062 [2021-06-05 16:48:00,428 INFO L226 Difference]: Without dead ends: 2032 [2021-06-05 16:48:00,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1683.2ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:48:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-06-05 16:48:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1752. [2021-06-05 16:48:00,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.371216447744146) internal successors, (5903), 1751 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5903 transitions. [2021-06-05 16:48:00,448 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5903 transitions. Word has length 26 [2021-06-05 16:48:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:00,448 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5903 transitions. [2021-06-05 16:48:00,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:00,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5903 transitions. [2021-06-05 16:48:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:00,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:00,450 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:00,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2588 [2021-06-05 16:48:00,651 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:00,651 INFO L82 PathProgramCache]: Analyzing trace with hash 339310983, now seen corresponding path program 43 times [2021-06-05 16:48:00,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:00,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170912264] [2021-06-05 16:48:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:01,049 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-06-05 16:48:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:01,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:01,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170912264] [2021-06-05 16:48:01,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170912264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:01,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092231824] [2021-06-05 16:48:01,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:01,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:01,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:01,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,575 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:01,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:48:01,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,588 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:48:01,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 16:48:01,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,600 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:01,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:48:01,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:01,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:48:01,614 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:01,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:48:01,630 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,640 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:01,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:48:01,641 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,651 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:01,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:48:01,652 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:01,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:48:01,666 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,675 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:01,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:48:01,676 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,686 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:01,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:48:01,687 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,698 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:01,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:48:01,698 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,708 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:01,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:48:01,710 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,720 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:01,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:48:01,721 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,731 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:01,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2021-06-05 16:48:01,732 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,741 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:01,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:48:01,742 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:01,748 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:01,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:48:01,749 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:01,878 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-06-05 16:48:01,878 INFO L628 ElimStorePlain]: treesize reduction 60, result has 61.3 percent of original size [2021-06-05 16:48:01,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:48:01,881 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-06-05 16:48:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:02,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092231824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:02,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:02,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:48:02,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160400925] [2021-06-05 16:48:02,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:48:02,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:02,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:48:02,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:48:02,023 INFO L87 Difference]: Start difference. First operand 1752 states and 5903 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:02,293 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 16:48:02,673 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-05 16:48:02,952 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-05 16:48:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:03,139 INFO L93 Difference]: Finished difference Result 2448 states and 8060 transitions. [2021-06-05 16:48:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:48:03,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:03,143 INFO L225 Difference]: With dead ends: 2448 [2021-06-05 16:48:03,144 INFO L226 Difference]: Without dead ends: 2433 [2021-06-05 16:48:03,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1576.5ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:48:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-06-05 16:48:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1749. [2021-06-05 16:48:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.372425629290618) internal successors, (5895), 1748 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5895 transitions. [2021-06-05 16:48:03,169 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5895 transitions. Word has length 26 [2021-06-05 16:48:03,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:03,169 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 5895 transitions. [2021-06-05 16:48:03,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5895 transitions. [2021-06-05 16:48:03,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:03,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:03,171 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:03,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2630 [2021-06-05 16:48:03,372 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:03,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1589366837, now seen corresponding path program 44 times [2021-06-05 16:48:03,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:03,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107821217] [2021-06-05 16:48:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:03,778 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-06-05 16:48:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:03,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:03,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107821217] [2021-06-05 16:48:03,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107821217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:03,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867067424] [2021-06-05 16:48:03,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:03,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:48:03,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:03,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:48:03,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:04,399 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:48:04,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 53 [2021-06-05 16:48:04,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:04,630 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 16:48:04,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:04,668 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:48:04,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2021-06-05 16:48:04,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:05,001 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 159 [2021-06-05 16:48:05,001 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.5 percent of original size [2021-06-05 16:48:05,027 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:48:05,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 59 [2021-06-05 16:48:05,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:05,210 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 16:48:05,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:05,235 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:48:05,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 59 [2021-06-05 16:48:05,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:05,404 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 16:48:05,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:05,429 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:48:05,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-06-05 16:48:05,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:05,601 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 16:48:05,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:05,622 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:48:05,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 49 [2021-06-05 16:48:05,624 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:05,781 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 16:48:05,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:05,799 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:48:05,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 39 [2021-06-05 16:48:05,801 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:05,950 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:48:05,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:05,970 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:48:05,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-06-05 16:48:05,974 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:06,116 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 16:48:06,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:06,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:48:06,144 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:625, output treesize:405 [2021-06-05 16:48:06,335 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-06-05 16:48:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:06,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867067424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:06,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:06,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:48:06,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176556275] [2021-06-05 16:48:06,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:48:06,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:06,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:48:06,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:48:06,425 INFO L87 Difference]: Start difference. First operand 1749 states and 5895 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:06,817 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-06-05 16:48:07,014 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2021-06-05 16:48:07,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:07,375 INFO L93 Difference]: Finished difference Result 2259 states and 7490 transitions. [2021-06-05 16:48:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:48:07,375 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:07,378 INFO L225 Difference]: With dead ends: 2259 [2021-06-05 16:48:07,378 INFO L226 Difference]: Without dead ends: 2244 [2021-06-05 16:48:07,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1606.1ms TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:48:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-05 16:48:07,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1752. [2021-06-05 16:48:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.3757852655625356) internal successors, (5911), 1751 states have internal predecessors, (5911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5911 transitions. [2021-06-05 16:48:07,398 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5911 transitions. Word has length 26 [2021-06-05 16:48:07,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:07,398 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5911 transitions. [2021-06-05 16:48:07,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5911 transitions. [2021-06-05 16:48:07,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:07,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:07,400 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:07,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2663,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:07,600 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:07,600 INFO L82 PathProgramCache]: Analyzing trace with hash 755189195, now seen corresponding path program 45 times [2021-06-05 16:48:07,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:07,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987400315] [2021-06-05 16:48:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:07,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:07,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987400315] [2021-06-05 16:48:07,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987400315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:07,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506793964] [2021-06-05 16:48:07,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:07,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:48:07,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:07,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:48:07,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:08,505 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:48:08,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-06-05 16:48:08,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:08,978 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 184 [2021-06-05 16:48:08,979 INFO L628 ElimStorePlain]: treesize reduction 60, result has 91.1 percent of original size [2021-06-05 16:48:09,004 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:48:09,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2021-06-05 16:48:09,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:09,222 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2021-06-05 16:48:09,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:09,247 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:48:09,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-06-05 16:48:09,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:09,467 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 16:48:09,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:09,494 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:48:09,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-06-05 16:48:09,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:09,957 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 161 [2021-06-05 16:48:09,958 INFO L628 ElimStorePlain]: treesize reduction 13, result has 97.7 percent of original size [2021-06-05 16:48:09,987 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:48:09,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-06-05 16:48:09,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:10,406 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2021-06-05 16:48:10,406 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.5 percent of original size [2021-06-05 16:48:10,431 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:48:10,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 51 [2021-06-05 16:48:10,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:10,838 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2021-06-05 16:48:10,838 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.2 percent of original size [2021-06-05 16:48:10,860 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:48:10,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-06-05 16:48:10,864 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:11,047 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:48:11,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:11,066 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:48:11,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 47 [2021-06-05 16:48:11,067 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:11,236 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:48:11,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:11,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:48:11,263 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:673, output treesize:432 [2021-06-05 16:48:11,516 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-06-05 16:48:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:11,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506793964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:11,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:11,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:48:11,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333591513] [2021-06-05 16:48:11,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:48:11,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:11,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:48:11,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:48:11,610 INFO L87 Difference]: Start difference. First operand 1752 states and 5911 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:12,121 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-05 16:48:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:12,642 INFO L93 Difference]: Finished difference Result 2323 states and 7689 transitions. [2021-06-05 16:48:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:48:12,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:12,646 INFO L225 Difference]: With dead ends: 2323 [2021-06-05 16:48:12,646 INFO L226 Difference]: Without dead ends: 2308 [2021-06-05 16:48:12,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1559.5ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:48:12,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-06-05 16:48:12,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1770. [2021-06-05 16:48:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.3719615602035047) internal successors, (5965), 1769 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 5965 transitions. [2021-06-05 16:48:12,667 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 5965 transitions. Word has length 26 [2021-06-05 16:48:12,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:12,667 INFO L482 AbstractCegarLoop]: Abstraction has 1770 states and 5965 transitions. [2021-06-05 16:48:12,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:12,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 5965 transitions. [2021-06-05 16:48:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:12,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:12,669 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:12,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2693,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:12,870 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:12,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1554530479, now seen corresponding path program 46 times [2021-06-05 16:48:12,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:12,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165533869] [2021-06-05 16:48:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:13,243 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-05 16:48:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:13,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:13,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165533869] [2021-06-05 16:48:13,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165533869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:13,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306682152] [2021-06-05 16:48:13,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:13,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:48:13,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:13,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:13,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:13,904 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 16:48:14,122 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 65 [2021-06-05 16:48:14,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:14,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:14,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:14,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:48:14,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:14,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:14,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:14,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:48:14,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:14,339 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 16:48:14,340 INFO L628 ElimStorePlain]: treesize reduction 73, result has 65.9 percent of original size [2021-06-05 16:48:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:14,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:14,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:48:14,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:14,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:14,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:14,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:14,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:48:14,394 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:14,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:14,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:14,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:14,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 16:48:14,437 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:14,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:14,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:48:14,475 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:61 [2021-06-05 16:48:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:14,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306682152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:14,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:14,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:48:14,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109052167] [2021-06-05 16:48:14,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:48:14,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:14,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:48:14,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:48:14,544 INFO L87 Difference]: Start difference. First operand 1770 states and 5965 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:14,822 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-05 16:48:15,452 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:48:15,723 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-06-05 16:48:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:15,844 INFO L93 Difference]: Finished difference Result 2217 states and 7354 transitions. [2021-06-05 16:48:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:48:15,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:15,848 INFO L225 Difference]: With dead ends: 2217 [2021-06-05 16:48:15,848 INFO L226 Difference]: Without dead ends: 2202 [2021-06-05 16:48:15,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1997.7ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:48:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-05 16:48:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1791. [2021-06-05 16:48:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.368715083798883) internal successors, (6030), 1790 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6030 transitions. [2021-06-05 16:48:15,868 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6030 transitions. Word has length 26 [2021-06-05 16:48:15,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:15,868 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6030 transitions. [2021-06-05 16:48:15,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:15,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6030 transitions. [2021-06-05 16:48:15,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:15,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:15,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:16,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2732,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:16,070 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:16,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:16,070 INFO L82 PathProgramCache]: Analyzing trace with hash -63002301, now seen corresponding path program 47 times [2021-06-05 16:48:16,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:16,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374009195] [2021-06-05 16:48:16,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:16,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:16,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374009195] [2021-06-05 16:48:16,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374009195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:16,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228392791] [2021-06-05 16:48:16,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:16,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:48:16,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:16,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:48:16,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:16,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:16,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:48:16,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,757 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:48:16,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:48:16,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,767 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:16,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:48:16,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,777 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:16,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:48:16,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:16,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:48:16,791 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,803 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:48:16,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:48:16,805 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:16,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:48:16,818 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,828 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:16,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:48:16,828 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,839 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:16,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:48:16,840 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,850 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:16,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:48:16,850 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,859 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:16,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:48:16,861 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,870 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:16,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:48:16,871 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,881 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:16,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:48:16,882 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,892 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:16,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:48:16,892 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,903 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:16,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:48:16,903 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:16,910 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:16,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:48:16,910 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:16,988 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-06-05 16:48:16,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:48:16,989 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 16:48:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:17,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228392791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:17,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:17,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:48:17,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386117617] [2021-06-05 16:48:17,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:48:17,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:17,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:48:17,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:48:17,124 INFO L87 Difference]: Start difference. First operand 1791 states and 6030 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:17,503 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 16:48:18,000 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-05 16:48:18,156 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 16:48:18,399 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 16:48:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:18,744 INFO L93 Difference]: Finished difference Result 2500 states and 8240 transitions. [2021-06-05 16:48:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:48:18,744 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:18,748 INFO L225 Difference]: With dead ends: 2500 [2021-06-05 16:48:18,748 INFO L226 Difference]: Without dead ends: 2485 [2021-06-05 16:48:18,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1784.4ms TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:48:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-06-05 16:48:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 1788. [2021-06-05 16:48:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.369893676552882) internal successors, (6022), 1787 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6022 transitions. [2021-06-05 16:48:18,775 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6022 transitions. Word has length 26 [2021-06-05 16:48:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:18,775 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6022 transitions. [2021-06-05 16:48:18,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6022 transitions. [2021-06-05 16:48:18,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:18,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:18,777 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:18,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2743 [2021-06-05 16:48:18,980 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:18,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1752945205, now seen corresponding path program 48 times [2021-06-05 16:48:18,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:18,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021024470] [2021-06-05 16:48:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:19,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:19,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021024470] [2021-06-05 16:48:19,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021024470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:19,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709209346] [2021-06-05 16:48:19,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:19,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:48:19,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:19,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:48:19,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:19,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,725 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:19,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 16:48:19,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:19,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-06-05 16:48:19,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,759 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:48:19,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2021-06-05 16:48:19,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,773 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:19,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-06-05 16:48:19,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,786 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:19,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 16:48:19,786 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,800 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:19,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:48:19,801 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,813 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:19,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 16:48:19,814 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,832 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:48:19,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:48:19,833 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,848 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:19,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 16:48:19,849 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,863 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:19,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 16:48:19,864 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,875 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:19,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-06-05 16:48:19,876 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,889 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:19,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:48:19,890 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:19,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-06-05 16:48:19,907 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,923 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:48:19,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2021-06-05 16:48:19,924 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,936 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:19,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:48:19,937 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:19,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:19,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:19,945 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:19,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:48:19,946 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:20,021 INFO L628 ElimStorePlain]: treesize reduction 49, result has 63.7 percent of original size [2021-06-05 16:48:20,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:48:20,022 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-06-05 16:48:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:20,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709209346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:20,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:20,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:48:20,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389497688] [2021-06-05 16:48:20,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:48:20,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:20,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:48:20,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:48:20,159 INFO L87 Difference]: Start difference. First operand 1788 states and 6022 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:20,969 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2021-06-05 16:48:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:21,364 INFO L93 Difference]: Finished difference Result 2414 states and 7934 transitions. [2021-06-05 16:48:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:48:21,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:21,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:21,368 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 16:48:21,368 INFO L226 Difference]: Without dead ends: 2368 [2021-06-05 16:48:21,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1448.9ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:48:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-06-05 16:48:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 1811. [2021-06-05 16:48:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.372375690607735) internal successors, (6104), 1810 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:21,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6104 transitions. [2021-06-05 16:48:21,389 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6104 transitions. Word has length 26 [2021-06-05 16:48:21,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:21,389 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6104 transitions. [2021-06-05 16:48:21,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6104 transitions. [2021-06-05 16:48:21,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:21,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:21,391 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:21,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2754,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:21,592 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:21,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:21,592 INFO L82 PathProgramCache]: Analyzing trace with hash 731595527, now seen corresponding path program 49 times [2021-06-05 16:48:21,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:21,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029670043] [2021-06-05 16:48:21,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:21,946 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-05 16:48:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:22,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:22,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029670043] [2021-06-05 16:48:22,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029670043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:22,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613443000] [2021-06-05 16:48:22,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:22,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:22,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:22,541 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_390, v_prenex_388, v_prenex_389], 3=[A]} [2021-06-05 16:48:22,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:22,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:22,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:48:22,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:22,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:22,570 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:48:22,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:48:22,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:22,733 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 16:48:22,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:22,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:22,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:22,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:48:22,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:22,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:22,759 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:22,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:48:22,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:22,886 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:48:22,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:22,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:22,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:22,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:48:22,901 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:22,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:22,912 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:48:22,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:48:22,914 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:23,139 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 16:48:23,140 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.0 percent of original size [2021-06-05 16:48:23,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:23,158 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 16:48:23,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 45 [2021-06-05 16:48:23,160 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:23,174 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:48:23,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 52 [2021-06-05 16:48:23,176 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:23,353 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 16:48:23,353 INFO L628 ElimStorePlain]: treesize reduction 32, result has 85.1 percent of original size [2021-06-05 16:48:23,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:48:23,359 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:442, output treesize:160 [2021-06-05 16:48:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:23,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613443000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:23,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:23,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:48:23,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735409821] [2021-06-05 16:48:23,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:48:23,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:23,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:48:23,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:48:23,561 INFO L87 Difference]: Start difference. First operand 1811 states and 6104 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:24,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:24,258 INFO L93 Difference]: Finished difference Result 2322 states and 7708 transitions. [2021-06-05 16:48:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:48:24,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:24,261 INFO L225 Difference]: With dead ends: 2322 [2021-06-05 16:48:24,261 INFO L226 Difference]: Without dead ends: 2307 [2021-06-05 16:48:24,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1270.2ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:48:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-06-05 16:48:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1811. [2021-06-05 16:48:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.372375690607735) internal successors, (6104), 1810 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6104 transitions. [2021-06-05 16:48:24,283 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6104 transitions. Word has length 26 [2021-06-05 16:48:24,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:24,283 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6104 transitions. [2021-06-05 16:48:24,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6104 transitions. [2021-06-05 16:48:24,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:24,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:24,285 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:24,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2773 [2021-06-05 16:48:24,485 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:24,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:24,486 INFO L82 PathProgramCache]: Analyzing trace with hash 396904007, now seen corresponding path program 55 times [2021-06-05 16:48:24,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:24,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922993461] [2021-06-05 16:48:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:24,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:24,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922993461] [2021-06-05 16:48:24,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922993461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:24,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838869747] [2021-06-05 16:48:24,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:24,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:24,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:25,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,319 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:48:25,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 57 [2021-06-05 16:48:25,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,340 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 1 [2021-06-05 16:48:25,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,359 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 47 [2021-06-05 16:48:25,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,381 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 16:48:25,382 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,402 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 1 [2021-06-05 16:48:25,403 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,420 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 42 [2021-06-05 16:48:25,422 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,442 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 1 [2021-06-05 16:48:25,443 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,462 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 1 [2021-06-05 16:48:25,463 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,482 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 1 [2021-06-05 16:48:25,483 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,502 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 1 [2021-06-05 16:48:25,503 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,522 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-05 16:48:25,523 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,542 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 16:48:25,543 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,570 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:48:25,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 55 [2021-06-05 16:48:25,572 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,592 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 16:48:25,593 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,609 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:48:25,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 45 [2021-06-05 16:48:25,611 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:25,617 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:48:25,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 44 [2021-06-05 16:48:25,618 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:25,662 INFO L628 ElimStorePlain]: treesize reduction 50, result has 45.1 percent of original size [2021-06-05 16:48:25,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:48:25,664 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1653, output treesize:29 [2021-06-05 16:48:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:25,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838869747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:25,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:25,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:48:25,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518068207] [2021-06-05 16:48:25,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:48:25,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:25,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:48:25,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:48:25,713 INFO L87 Difference]: Start difference. First operand 1811 states and 6104 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:26,413 INFO L93 Difference]: Finished difference Result 2373 states and 7573 transitions. [2021-06-05 16:48:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:48:26,414 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:26,417 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 16:48:26,417 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 16:48:26,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 960.9ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:48:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 16:48:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1833. [2021-06-05 16:48:26,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.3717248908296944) internal successors, (6177), 1832 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:26,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6177 transitions. [2021-06-05 16:48:26,442 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6177 transitions. Word has length 26 [2021-06-05 16:48:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:26,442 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6177 transitions. [2021-06-05 16:48:26,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:26,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6177 transitions. [2021-06-05 16:48:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:26,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:26,444 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:26,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2802 [2021-06-05 16:48:26,644 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:26,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:26,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1464778571, now seen corresponding path program 56 times [2021-06-05 16:48:26,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:26,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186637788] [2021-06-05 16:48:26,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:27,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:27,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186637788] [2021-06-05 16:48:27,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186637788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:27,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832251214] [2021-06-05 16:48:27,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:27,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:48:27,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:27,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:27,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:27,323 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 16:48:27,377 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_391, v_prenex_395], 5=[A, v_prenex_393]} [2021-06-05 16:48:27,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:27,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:27,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:27,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:27,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:48:27,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:27,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:27,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:27,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:27,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 12 [2021-06-05 16:48:27,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:27,527 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 16:48:27,528 INFO L628 ElimStorePlain]: treesize reduction 199, result has 46.8 percent of original size [2021-06-05 16:48:27,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:27,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:27,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:48:27,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:27,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:27,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:27,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:27,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:27,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:27,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 24 [2021-06-05 16:48:27,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:27,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:27,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:27,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:27,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:27,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-06-05 16:48:27,631 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:27,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:27,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:48:27,670 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:445, output treesize:55 [2021-06-05 16:48:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:27,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832251214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:27,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:27,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:48:27,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544847083] [2021-06-05 16:48:27,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:48:27,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:27,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:48:27,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:48:27,729 INFO L87 Difference]: Start difference. First operand 1833 states and 6177 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:28,469 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 16:48:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:28,603 INFO L93 Difference]: Finished difference Result 2211 states and 7333 transitions. [2021-06-05 16:48:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:48:28,603 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:28,606 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 16:48:28,606 INFO L226 Difference]: Without dead ends: 2180 [2021-06-05 16:48:28,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1045.7ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:48:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-06-05 16:48:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1833. [2021-06-05 16:48:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.368449781659389) internal successors, (6171), 1832 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6171 transitions. [2021-06-05 16:48:28,628 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6171 transitions. Word has length 26 [2021-06-05 16:48:28,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:28,628 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6171 transitions. [2021-06-05 16:48:28,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:28,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6171 transitions. [2021-06-05 16:48:28,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:28,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:28,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:28,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2860 [2021-06-05 16:48:28,832 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash -192487861, now seen corresponding path program 57 times [2021-06-05 16:48:28,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:28,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562624898] [2021-06-05 16:48:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:29,201 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-06-05 16:48:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:29,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:29,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562624898] [2021-06-05 16:48:29,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562624898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:29,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256418845] [2021-06-05 16:48:29,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:29,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:48:29,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:29,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:29,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:29,796 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 16:48:30,093 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_408, v_prenex_409], 6=[v_prenex_404, v_prenex_405, A, v_prenex_407, v_prenex_411, v_prenex_413]} [2021-06-05 16:48:30,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:30,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:30,138 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:48:30,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 39 [2021-06-05 16:48:30,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:30,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:30,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:30,177 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:48:30,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-05 16:48:30,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:31,185 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 227 DAG size of output: 221 [2021-06-05 16:48:31,186 INFO L628 ElimStorePlain]: treesize reduction 38, result has 97.9 percent of original size [2021-06-05 16:48:31,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:31,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:31,234 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:48:31,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2021-06-05 16:48:31,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:31,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:31,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:31,267 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-05 16:48:31,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-05 16:48:31,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:31,759 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2021-06-05 16:48:31,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:31,816 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-06-05 16:48:31,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 85 [2021-06-05 16:48:31,823 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:31,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:31,855 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-06-05 16:48:31,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 70 [2021-06-05 16:48:31,857 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:32,306 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2021-06-05 16:48:32,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:32,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:32,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:32,348 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 16:48:32,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-06-05 16:48:32,351 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:32,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:32,367 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:48:32,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 16:48:32,368 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:32,735 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 16:48:32,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:32,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:32,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:32,777 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 16:48:32,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 84 [2021-06-05 16:48:32,781 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:32,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:32,808 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 16:48:32,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 65 [2021-06-05 16:48:32,809 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:33,495 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 154 [2021-06-05 16:48:33,496 INFO L628 ElimStorePlain]: treesize reduction 12, result has 98.9 percent of original size [2021-06-05 16:48:33,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:33,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:33,533 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-06-05 16:48:33,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 71 [2021-06-05 16:48:33,535 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:33,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:33,573 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 16:48:33,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 162 treesize of output 96 [2021-06-05 16:48:33,597 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:34,169 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 133 [2021-06-05 16:48:34,170 INFO L628 ElimStorePlain]: treesize reduction 34, result has 96.0 percent of original size [2021-06-05 16:48:34,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:34,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:34,207 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 16:48:34,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-06-05 16:48:34,210 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:34,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:34,221 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:48:34,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 16:48:34,222 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:34,441 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:48:34,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:34,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:34,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:34,477 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 16:48:34,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 78 [2021-06-05 16:48:34,494 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:34,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:34,521 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-06-05 16:48:34,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 167 treesize of output 87 [2021-06-05 16:48:34,525 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:34,864 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-05 16:48:34,865 INFO L628 ElimStorePlain]: treesize reduction 66, result has 83.2 percent of original size [2021-06-05 16:48:34,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-05 16:48:34,872 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1858, output treesize:310 [2021-06-05 16:48:35,042 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-06-05 16:48:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:35,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256418845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:35,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:35,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:48:35,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127305199] [2021-06-05 16:48:35,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:48:35,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:35,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:48:35,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:48:35,094 INFO L87 Difference]: Start difference. First operand 1833 states and 6171 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:36,154 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:48:36,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:36,285 INFO L93 Difference]: Finished difference Result 2363 states and 7827 transitions. [2021-06-05 16:48:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:48:36,285 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:36,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:36,289 INFO L225 Difference]: With dead ends: 2363 [2021-06-05 16:48:36,289 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 16:48:36,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1907.5ms TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:48:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 16:48:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1833. [2021-06-05 16:48:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.368449781659389) internal successors, (6171), 1832 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6171 transitions. [2021-06-05 16:48:36,313 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6171 transitions. Word has length 26 [2021-06-05 16:48:36,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:36,313 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6171 transitions. [2021-06-05 16:48:36,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6171 transitions. [2021-06-05 16:48:36,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:36,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:36,315 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:36,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2874,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:36,516 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:36,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:36,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1845763381, now seen corresponding path program 50 times [2021-06-05 16:48:36,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:36,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784890047] [2021-06-05 16:48:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:36,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:36,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784890047] [2021-06-05 16:48:36,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784890047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:36,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541361727] [2021-06-05 16:48:36,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:37,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:48:37,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:37,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:48:37,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:37,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:37,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:48:37,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,302 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:48:37,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:48:37,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,312 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:37,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:48:37,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,321 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:37,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:48:37,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:37,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:48:37,335 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,347 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:48:37,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:48:37,348 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:37,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:48:37,361 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,369 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:37,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:48:37,370 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:37,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:48:37,381 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,390 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:37,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:48:37,391 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,399 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:37,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:48:37,401 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,410 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:37,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:48:37,410 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,419 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:37,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:48:37,420 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,428 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:37,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:48:37,429 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:37,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:48:37,438 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:37,452 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:48:37,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:48:37,453 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:37,544 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-06-05 16:48:37,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:48:37,545 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-05 16:48:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:37,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541361727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:37,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:37,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:48:37,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530459569] [2021-06-05 16:48:37,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:48:37,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:37,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:48:37,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:48:37,671 INFO L87 Difference]: Start difference. First operand 1833 states and 6171 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:38,117 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-05 16:48:38,847 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-06-05 16:48:39,103 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 16:48:39,340 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 16:48:39,534 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-05 16:48:39,838 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2021-06-05 16:48:40,023 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-06-05 16:48:40,458 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 16:48:40,763 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-05 16:48:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:40,836 INFO L93 Difference]: Finished difference Result 2484 states and 8143 transitions. [2021-06-05 16:48:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:48:40,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:40,839 INFO L225 Difference]: With dead ends: 2484 [2021-06-05 16:48:40,839 INFO L226 Difference]: Without dead ends: 2469 [2021-06-05 16:48:40,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3002.3ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:48:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-06-05 16:48:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1840. [2021-06-05 16:48:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.368678629690049) internal successors, (6195), 1839 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6195 transitions. [2021-06-05 16:48:40,871 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6195 transitions. Word has length 26 [2021-06-05 16:48:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:40,871 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6195 transitions. [2021-06-05 16:48:40,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6195 transitions. [2021-06-05 16:48:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:40,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:40,873 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:41,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2937,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:41,074 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:41,074 INFO L82 PathProgramCache]: Analyzing trace with hash -295381817, now seen corresponding path program 58 times [2021-06-05 16:48:41,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:41,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866155859] [2021-06-05 16:48:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:41,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:41,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866155859] [2021-06-05 16:48:41,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866155859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:41,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762274518] [2021-06-05 16:48:41,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:41,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:48:41,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:41,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:48:41,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:41,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:41,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 16:48:42,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-06-05 16:48:42,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-06-05 16:48:42,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-05 16:48:42,032 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:48:42,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:48:42,051 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-06-05 16:48:42,061 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:48:42,070 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2021-06-05 16:48:42,080 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:48:42,089 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:48:42,099 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-06-05 16:48:42,108 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-06-05 16:48:42,119 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-06-05 16:48:42,128 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-06-05 16:48:42,137 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:42,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:42,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:48:42,142 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,167 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-06-05 16:48:42,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:48:42,168 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-06-05 16:48:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:42,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762274518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:42,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:42,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:48:42,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383808239] [2021-06-05 16:48:42,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:48:42,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:42,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:48:42,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:48:42,203 INFO L87 Difference]: Start difference. First operand 1840 states and 6195 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:43,113 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 16:48:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:43,959 INFO L93 Difference]: Finished difference Result 2777 states and 8773 transitions. [2021-06-05 16:48:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:48:43,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:43,963 INFO L225 Difference]: With dead ends: 2777 [2021-06-05 16:48:43,963 INFO L226 Difference]: Without dead ends: 2740 [2021-06-05 16:48:43,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1651.9ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:48:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-05 16:48:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1885. [2021-06-05 16:48:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.379511677282378) internal successors, (6367), 1884 states have internal predecessors, (6367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6367 transitions. [2021-06-05 16:48:43,988 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6367 transitions. Word has length 26 [2021-06-05 16:48:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:43,988 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 6367 transitions. [2021-06-05 16:48:43,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6367 transitions. [2021-06-05 16:48:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:43,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:43,990 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:44,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:44,191 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:44,192 INFO L82 PathProgramCache]: Analyzing trace with hash -69388293, now seen corresponding path program 59 times [2021-06-05 16:48:44,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:44,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484070628] [2021-06-05 16:48:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:44,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:44,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484070628] [2021-06-05 16:48:44,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484070628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:44,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952457408] [2021-06-05 16:48:44,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:44,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:48:44,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:44,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:44,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:45,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-06-05 16:48:45,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-06-05 16:48:45,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:48:45,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 16:48:45,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-06-05 16:48:45,099 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-06-05 16:48:45,110 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-06-05 16:48:45,121 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 16:48:45,132 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-06-05 16:48:45,143 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 16:48:45,153 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-06-05 16:48:45,164 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-06-05 16:48:45,176 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-06-05 16:48:45,199 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-06-05 16:48:45,210 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-06-05 16:48:45,220 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:45,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:48:45,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-06-05 16:48:45,228 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:45,310 INFO L628 ElimStorePlain]: treesize reduction 347, result has 11.5 percent of original size [2021-06-05 16:48:45,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:48:45,311 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:39 [2021-06-05 16:48:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:45,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952457408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:45,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:45,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:48:45,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678258509] [2021-06-05 16:48:45,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:48:45,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:45,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:48:45,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:48:45,355 INFO L87 Difference]: Start difference. First operand 1885 states and 6367 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:46,264 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 16:48:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:46,736 INFO L93 Difference]: Finished difference Result 3099 states and 9931 transitions. [2021-06-05 16:48:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:48:46,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:46,740 INFO L225 Difference]: With dead ends: 3099 [2021-06-05 16:48:46,740 INFO L226 Difference]: Without dead ends: 3069 [2021-06-05 16:48:46,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1409.7ms TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:48:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-06-05 16:48:46,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1905. [2021-06-05 16:48:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 3.3891806722689077) internal successors, (6453), 1904 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 6453 transitions. [2021-06-05 16:48:46,777 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 6453 transitions. Word has length 26 [2021-06-05 16:48:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:46,777 INFO L482 AbstractCegarLoop]: Abstraction has 1905 states and 6453 transitions. [2021-06-05 16:48:46,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 6453 transitions. [2021-06-05 16:48:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:46,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:46,780 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:46,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-06-05 16:48:46,980 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:46,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:46,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1764260359, now seen corresponding path program 60 times [2021-06-05 16:48:46,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:46,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321594840] [2021-06-05 16:48:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:47,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:47,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321594840] [2021-06-05 16:48:47,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321594840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:47,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131486937] [2021-06-05 16:48:47,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:47,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:48:47,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:47,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:48:47,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,530 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 16:48:47,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2021-06-05 16:48:47,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:47,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 58 [2021-06-05 16:48:47,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,595 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:48:47,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 39 [2021-06-05 16:48:47,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,630 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-05 16:48:47,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-06-05 16:48:47,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,670 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:48:47,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 16:48:47,673 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,697 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:48:47,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 16:48:47,698 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,744 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-05 16:48:47,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 46 [2021-06-05 16:48:47,748 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,769 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:48:47,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:48:47,771 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,795 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:48:47,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:48:47,796 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,817 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:48:47,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:48:47,819 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,841 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:48:47,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 16:48:47,843 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,867 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:48:47,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 16:48:47,868 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,891 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:48:47,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:48:47,892 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,915 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:48:47,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:48:47,916 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,939 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:48:47,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-06-05 16:48:47,940 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:47,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:47,964 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-05 16:48:47,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 35 [2021-06-05 16:48:47,966 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:48,079 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-06-05 16:48:48,079 INFO L628 ElimStorePlain]: treesize reduction 130, result has 35.0 percent of original size [2021-06-05 16:48:48,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:48:48,081 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:70 [2021-06-05 16:48:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:48,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131486937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:48,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:48,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:48:48,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119659276] [2021-06-05 16:48:48,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:48:48,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:48,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:48:48,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:48:48,219 INFO L87 Difference]: Start difference. First operand 1905 states and 6453 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:48,852 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 16:48:49,785 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 16:48:49,948 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-05 16:48:50,079 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-05 16:48:50,378 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 16:48:50,580 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-05 16:48:50,878 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 16:48:51,181 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 16:48:51,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:51,361 INFO L93 Difference]: Finished difference Result 2960 states and 9357 transitions. [2021-06-05 16:48:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:48:51,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:51,365 INFO L225 Difference]: With dead ends: 2960 [2021-06-05 16:48:51,365 INFO L226 Difference]: Without dead ends: 2916 [2021-06-05 16:48:51,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2998.0ms TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:48:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2021-06-05 16:48:51,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 1933. [2021-06-05 16:48:51,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 3.391821946169772) internal successors, (6553), 1932 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 6553 transitions. [2021-06-05 16:48:51,390 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 6553 transitions. Word has length 26 [2021-06-05 16:48:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:51,390 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 6553 transitions. [2021-06-05 16:48:51,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 6553 transitions. [2021-06-05 16:48:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:51,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:51,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:51,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3152 [2021-06-05 16:48:51,593 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:51,593 INFO L82 PathProgramCache]: Analyzing trace with hash -680204241, now seen corresponding path program 51 times [2021-06-05 16:48:51,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:51,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848211147] [2021-06-05 16:48:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:51,786 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-06-05 16:48:51,915 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-05 16:48:52,033 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 16:48:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:52,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:52,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848211147] [2021-06-05 16:48:52,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848211147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:52,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450893440] [2021-06-05 16:48:52,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:52,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:48:52,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:52,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 16:48:52,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:52,720 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 16:48:53,003 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 102 [2021-06-05 16:48:53,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:53,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:53,147 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:48:53,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:48:53,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:53,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:53,167 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:48:53,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 46 [2021-06-05 16:48:53,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:53,353 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2021-06-05 16:48:53,354 INFO L628 ElimStorePlain]: treesize reduction 291, result has 43.3 percent of original size [2021-06-05 16:48:53,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:53,366 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:48:53,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 16:48:53,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:53,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:53,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:53,451 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:48:53,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 16:48:53,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:53,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:53,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:53,528 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 16:48:53,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-05 16:48:53,529 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:53,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:53,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:53,593 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:48:53,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 16:48:53,594 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:53,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:53,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:48:53,646 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:627, output treesize:83 [2021-06-05 16:48:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:53,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450893440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:53,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:53,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:48:53,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882760434] [2021-06-05 16:48:53,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:48:53,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:53,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:48:53,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:48:53,740 INFO L87 Difference]: Start difference. First operand 1933 states and 6553 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:54,393 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 16:48:54,850 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 16:48:55,243 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 16:48:55,703 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 16:48:55,921 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 16:48:56,536 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 134 [2021-06-05 16:48:56,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:48:56,726 INFO L93 Difference]: Finished difference Result 2443 states and 8134 transitions. [2021-06-05 16:48:56,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:48:56,727 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:48:56,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:48:56,730 INFO L225 Difference]: With dead ends: 2443 [2021-06-05 16:48:56,730 INFO L226 Difference]: Without dead ends: 2428 [2021-06-05 16:48:56,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3384.9ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:48:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-05 16:48:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1948. [2021-06-05 16:48:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.389830508474576) internal successors, (6600), 1947 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6600 transitions. [2021-06-05 16:48:56,751 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6600 transitions. Word has length 26 [2021-06-05 16:48:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:48:56,752 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6600 transitions. [2021-06-05 16:48:56,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6600 transitions. [2021-06-05 16:48:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:48:56,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:48:56,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:48:56,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3181 [2021-06-05 16:48:56,954 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:48:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:48:56,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1997230275, now seen corresponding path program 52 times [2021-06-05 16:48:56,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:48:56,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062106795] [2021-06-05 16:48:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:48:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:48:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:57,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:48:57,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062106795] [2021-06-05 16:48:57,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062106795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:57,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893054247] [2021-06-05 16:48:57,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:48:57,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:48:57,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:48:57,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:48:57,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:48:58,009 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:48:58,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:58,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:58,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:48:58,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:58,212 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-05 16:48:58,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:58,227 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:48:58,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 16:48:58,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:58,368 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:48:58,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:58,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:58,383 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:48:58,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:48:58,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:58,517 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 16:48:58,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:58,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:58,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:58,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:48:58,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:58,669 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:48:58,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:58,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:58,683 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:48:58,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:48:58,684 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:58,812 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 16:48:58,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:58,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:58,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:48:58,827 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:58,953 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:48:58,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:58,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:58,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:58,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:48:58,968 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:59,113 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:48:59,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:48:59,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:59,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:48:59,126 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:48:59,238 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:48:59,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:48:59,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:48:59,246 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-05 16:48:59,395 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-05 16:48:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:48:59,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893054247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:48:59,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:48:59,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:48:59,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620148535] [2021-06-05 16:48:59,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:48:59,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:48:59,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:48:59,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:48:59,478 INFO L87 Difference]: Start difference. First operand 1948 states and 6600 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:48:59,849 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 16:49:00,133 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-06-05 16:49:00,526 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-05 16:49:00,675 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-05 16:49:00,805 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 16:49:00,990 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-05 16:49:01,362 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:49:01,777 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-06-05 16:49:02,085 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 16:49:02,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:02,301 INFO L93 Difference]: Finished difference Result 2746 states and 9083 transitions. [2021-06-05 16:49:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:49:02,302 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:02,305 INFO L225 Difference]: With dead ends: 2746 [2021-06-05 16:49:02,305 INFO L226 Difference]: Without dead ends: 2731 [2021-06-05 16:49:02,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 3184.4ms TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:49:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2021-06-05 16:49:02,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 1943. [2021-06-05 16:49:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 3.388774459320288) internal successors, (6581), 1942 states have internal predecessors, (6581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 6581 transitions. [2021-06-05 16:49:02,330 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 6581 transitions. Word has length 26 [2021-06-05 16:49:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:02,331 INFO L482 AbstractCegarLoop]: Abstraction has 1943 states and 6581 transitions. [2021-06-05 16:49:02,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 6581 transitions. [2021-06-05 16:49:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:02,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:02,333 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:02,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3200,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:02,533 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:02,534 INFO L82 PathProgramCache]: Analyzing trace with hash 307287371, now seen corresponding path program 53 times [2021-06-05 16:49:02,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:02,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410319165] [2021-06-05 16:49:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:02,983 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-05 16:49:03,183 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 16:49:03,339 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-06-05 16:49:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:03,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:03,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410319165] [2021-06-05 16:49:03,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410319165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:03,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145739055] [2021-06-05 16:49:03,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:03,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:49:03,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:03,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:49:03,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:04,032 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 16:49:04,130 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_446], 3=[v_prenex_445, v_prenex_447], 6=[A]} [2021-06-05 16:49:04,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:04,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:49:04,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:04,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,160 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 16:49:04,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-05 16:49:04,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:04,504 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-06-05 16:49:04,505 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.4 percent of original size [2021-06-05 16:49:04,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,524 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 16:49:04,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 42 [2021-06-05 16:49:04,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:04,542 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 16:49:04,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 49 [2021-06-05 16:49:04,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:04,833 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-06-05 16:49:04,833 INFO L628 ElimStorePlain]: treesize reduction 36, result has 91.4 percent of original size [2021-06-05 16:49:04,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:04,853 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:49:04,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 16:49:04,856 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:04,868 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-05 16:49:04,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2021-06-05 16:49:04,870 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:04,991 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:49:04,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:04,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,021 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-06-05 16:49:05,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 59 [2021-06-05 16:49:05,023 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:05,031 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:49:05,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 1 [2021-06-05 16:49:05,032 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:05,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:05,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:49:05,126 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:518, output treesize:190 [2021-06-05 16:49:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:05,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145739055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:05,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:05,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:49:05,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578174037] [2021-06-05 16:49:05,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:49:05,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:05,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:49:05,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:49:05,332 INFO L87 Difference]: Start difference. First operand 1943 states and 6581 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:05,749 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-06-05 16:49:06,289 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-05 16:49:06,507 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-06-05 16:49:07,070 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 16:49:07,425 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-06-05 16:49:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:07,507 INFO L93 Difference]: Finished difference Result 2604 states and 8626 transitions. [2021-06-05 16:49:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:49:07,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:07,511 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 16:49:07,512 INFO L226 Difference]: Without dead ends: 2579 [2021-06-05 16:49:07,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2962.9ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:49:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2021-06-05 16:49:07,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 1939. [2021-06-05 16:49:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.392672858617131) internal successors, (6575), 1938 states have internal predecessors, (6575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6575 transitions. [2021-06-05 16:49:07,536 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6575 transitions. Word has length 26 [2021-06-05 16:49:07,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:07,536 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 6575 transitions. [2021-06-05 16:49:07,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6575 transitions. [2021-06-05 16:49:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:07,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:07,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:07,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3214,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:07,739 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:07,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1089911327, now seen corresponding path program 61 times [2021-06-05 16:49:07,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:07,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075415737] [2021-06-05 16:49:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:08,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:08,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075415737] [2021-06-05 16:49:08,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075415737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:08,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254477037] [2021-06-05 16:49:08,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:08,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:49:08,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:08,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,602 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:08,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 114 treesize of output 1 [2021-06-05 16:49:08,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,639 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:49:08,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 63 [2021-06-05 16:49:08,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,659 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:08,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 62 [2021-06-05 16:49:08,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,688 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:49:08,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 65 [2021-06-05 16:49:08,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,708 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:08,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 1 [2021-06-05 16:49:08,709 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,728 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:08,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 16:49:08,729 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,747 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:08,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 1 [2021-06-05 16:49:08,748 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,766 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:08,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 126 treesize of output 1 [2021-06-05 16:49:08,767 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,786 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:08,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 1 [2021-06-05 16:49:08,787 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,814 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:49:08,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 74 [2021-06-05 16:49:08,817 INFO L550 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,836 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:08,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 1 [2021-06-05 16:49:08,837 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,855 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:08,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 1 [2021-06-05 16:49:08,856 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,873 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:08,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 1 [2021-06-05 16:49:08,874 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,901 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:49:08,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 69 [2021-06-05 16:49:08,903 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,919 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:08,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 1 [2021-06-05 16:49:08,920 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:08,925 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:49:08,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 54 [2021-06-05 16:49:08,927 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:08,972 INFO L628 ElimStorePlain]: treesize reduction 66, result has 38.3 percent of original size [2021-06-05 16:49:08,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:49:08,974 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:2101, output treesize:30 [2021-06-05 16:49:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:09,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254477037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:09,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:09,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:49:09,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56359095] [2021-06-05 16:49:09,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:49:09,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:09,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:49:09,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:49:09,010 INFO L87 Difference]: Start difference. First operand 1939 states and 6575 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:09,793 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 16:49:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:10,605 INFO L93 Difference]: Finished difference Result 2711 states and 8858 transitions. [2021-06-05 16:49:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:49:10,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:10,610 INFO L225 Difference]: With dead ends: 2711 [2021-06-05 16:49:10,610 INFO L226 Difference]: Without dead ends: 2674 [2021-06-05 16:49:10,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1764.8ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:49:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-06-05 16:49:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 1951. [2021-06-05 16:49:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3897435897435897) internal successors, (6610), 1950 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6610 transitions. [2021-06-05 16:49:10,636 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6610 transitions. Word has length 26 [2021-06-05 16:49:10,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:10,636 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 6610 transitions. [2021-06-05 16:49:10,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6610 transitions. [2021-06-05 16:49:10,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:10,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:10,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:10,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:10,839 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:10,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:10,839 INFO L82 PathProgramCache]: Analyzing trace with hash -164417461, now seen corresponding path program 62 times [2021-06-05 16:49:10,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:10,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674542814] [2021-06-05 16:49:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:11,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:11,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674542814] [2021-06-05 16:49:11,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674542814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:11,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361788614] [2021-06-05 16:49:11,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:11,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:49:11,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:11,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:49:11,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:11,558 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-05 16:49:11,597 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_448, v_prenex_452], 6=[A, v_prenex_450]} [2021-06-05 16:49:11,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:11,615 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 16:49:11,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 41 [2021-06-05 16:49:11,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:11,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:11,627 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 16:49:11,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 16:49:11,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:11,770 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2021-06-05 16:49:11,771 INFO L628 ElimStorePlain]: treesize reduction 303, result has 45.9 percent of original size [2021-06-05 16:49:11,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:11,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:49:11,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:11,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:11,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:11,844 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 16:49:11,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 101 treesize of output 52 [2021-06-05 16:49:11,846 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:49:11,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:11,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:11,905 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 16:49:11,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 47 [2021-06-05 16:49:11,906 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:11,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:11,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:49:11,945 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:691, output treesize:55 [2021-06-05 16:49:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:12,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361788614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:12,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:12,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:49:12,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463505705] [2021-06-05 16:49:12,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:49:12,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:12,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:49:12,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:49:12,006 INFO L87 Difference]: Start difference. First operand 1951 states and 6610 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:13,682 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 16:49:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:13,852 INFO L93 Difference]: Finished difference Result 2506 states and 8326 transitions. [2021-06-05 16:49:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:49:13,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:13,857 INFO L225 Difference]: With dead ends: 2506 [2021-06-05 16:49:13,857 INFO L226 Difference]: Without dead ends: 2491 [2021-06-05 16:49:13,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2067.2ms TimeCoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:49:13,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-05 16:49:13,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1951. [2021-06-05 16:49:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3897435897435897) internal successors, (6610), 1950 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6610 transitions. [2021-06-05 16:49:13,892 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6610 transitions. Word has length 26 [2021-06-05 16:49:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:13,892 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 6610 transitions. [2021-06-05 16:49:13,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6610 transitions. [2021-06-05 16:49:13,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:13,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:13,895 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:14,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:14,109 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:14,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:14,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1406408139, now seen corresponding path program 63 times [2021-06-05 16:49:14,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:14,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434545741] [2021-06-05 16:49:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:14,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:14,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434545741] [2021-06-05 16:49:14,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434545741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:14,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320482325] [2021-06-05 16:49:14,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:14,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:49:14,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:14,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 16:49:14,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:14,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,771 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:49:14,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 49 [2021-06-05 16:49:14,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,806 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 16:49:14,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 47 [2021-06-05 16:49:14,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:14,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,828 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:14,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 16:49:14,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:14,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,855 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:49:14,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 16:49:14,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:14,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,873 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:14,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 16:49:14,874 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:14,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,904 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:49:14,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 49 [2021-06-05 16:49:14,907 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:14,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,926 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:14,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 16:49:14,927 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:14,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,956 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:49:14,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 47 [2021-06-05 16:49:14,957 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:14,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,984 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:49:14,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 35 [2021-06-05 16:49:14,985 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:14,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:14,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,003 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:15,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 16:49:15,004 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:15,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,023 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:15,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:49:15,024 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:15,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,043 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:15,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 16:49:15,044 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:15,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,064 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:15,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 16:49:15,065 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:15,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,083 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:15,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 16:49:15,084 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:15,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,101 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:15,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 16:49:15,102 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:15,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:15,114 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:15,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 16:49:15,114 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:15,276 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-06-05 16:49:15,276 INFO L628 ElimStorePlain]: treesize reduction 148, result has 49.5 percent of original size [2021-06-05 16:49:15,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:49:15,278 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1321, output treesize:145 [2021-06-05 16:49:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:15,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320482325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:15,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:15,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:49:15,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454255193] [2021-06-05 16:49:15,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:49:15,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:15,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:49:15,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:49:15,583 INFO L87 Difference]: Start difference. First operand 1951 states and 6610 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:16,320 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 16:49:17,005 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 16:49:17,146 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-06-05 16:49:17,500 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2021-06-05 16:49:18,142 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 16:49:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:18,511 INFO L93 Difference]: Finished difference Result 2931 states and 9407 transitions. [2021-06-05 16:49:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:49:18,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:18,515 INFO L225 Difference]: With dead ends: 2931 [2021-06-05 16:49:18,515 INFO L226 Difference]: Without dead ends: 2858 [2021-06-05 16:49:18,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 2956.7ms TimeCoverageRelationStatistics Valid=461, Invalid=1795, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:49:18,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-06-05 16:49:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2137. [2021-06-05 16:49:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.387172284644195) internal successors, (7235), 2136 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 7235 transitions. [2021-06-05 16:49:18,540 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 7235 transitions. Word has length 26 [2021-06-05 16:49:18,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:18,540 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 7235 transitions. [2021-06-05 16:49:18,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:18,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 7235 transitions. [2021-06-05 16:49:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:18,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:18,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:18,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3315,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:18,743 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:18,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:18,743 INFO L82 PathProgramCache]: Analyzing trace with hash -958901773, now seen corresponding path program 54 times [2021-06-05 16:49:18,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:18,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619671601] [2021-06-05 16:49:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:19,087 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 16:49:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:19,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:19,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619671601] [2021-06-05 16:49:19,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619671601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:19,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313932413] [2021-06-05 16:49:19,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:19,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:49:19,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:19,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:49:19,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:19,843 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 16:49:20,101 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:49:20,238 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_464, v_prenex_466, v_prenex_468], 3=[A, v_prenex_462, v_prenex_463, v_prenex_465, v_prenex_467]} [2021-06-05 16:49:20,266 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:49:20,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 16:49:20,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:20,459 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 16:49:20,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:20,488 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:49:20,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:49:20,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:20,678 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 16:49:20,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:20,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:20,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 16:49:20,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:20,897 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-06-05 16:49:20,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:20,919 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-05 16:49:20,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 53 [2021-06-05 16:49:20,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:21,095 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-05 16:49:21,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:21,122 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:49:21,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 64 [2021-06-05 16:49:21,124 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:21,307 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 16:49:21,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:21,332 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:49:21,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-06-05 16:49:21,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:21,511 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 16:49:21,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:21,537 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 16:49:21,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 71 [2021-06-05 16:49:21,539 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:21,707 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 16:49:21,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:21,730 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-05 16:49:21,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 57 [2021-06-05 16:49:21,732 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:21,889 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:49:21,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:21,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:49:21,904 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:606, output treesize:480 [2021-06-05 16:49:22,137 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-06-05 16:49:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:22,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313932413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:22,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:22,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:49:22,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026143945] [2021-06-05 16:49:22,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:49:22,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:22,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:49:22,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:49:22,250 INFO L87 Difference]: Start difference. First operand 2137 states and 7235 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:22,944 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 16:49:23,093 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 16:49:23,758 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 16:49:24,210 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 84 [2021-06-05 16:49:24,534 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:49:25,452 WARN L205 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 103 [2021-06-05 16:49:25,980 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 129 [2021-06-05 16:49:27,001 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 123 [2021-06-05 16:49:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:27,517 INFO L93 Difference]: Finished difference Result 2788 states and 9199 transitions. [2021-06-05 16:49:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:49:27,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:27,522 INFO L225 Difference]: With dead ends: 2788 [2021-06-05 16:49:27,522 INFO L226 Difference]: Without dead ends: 2773 [2021-06-05 16:49:27,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 5288.1ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:49:27,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2021-06-05 16:49:27,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2145. [2021-06-05 16:49:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 3.3857276119402986) internal successors, (7259), 2144 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 7259 transitions. [2021-06-05 16:49:27,548 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 7259 transitions. Word has length 26 [2021-06-05 16:49:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:27,549 INFO L482 AbstractCegarLoop]: Abstraction has 2145 states and 7259 transitions. [2021-06-05 16:49:27,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 7259 transitions. [2021-06-05 16:49:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:27,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:27,551 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:27,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3339,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:27,753 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:27,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1718532743, now seen corresponding path program 55 times [2021-06-05 16:49:27,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:27,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184471618] [2021-06-05 16:49:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:28,113 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 16:49:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:28,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:28,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184471618] [2021-06-05 16:49:28,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184471618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:28,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588453420] [2021-06-05 16:49:28,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:28,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:49:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:28,726 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 16:49:28,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:28,793 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:49:28,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 16:49:28,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:28,934 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 16:49:28,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:28,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:28,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:49:28,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:29,085 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 16:49:29,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:29,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:29,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-05 16:49:29,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:29,234 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 16:49:29,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:29,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:29,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:29,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 16:49:29,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:29,397 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:49:29,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:29,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:29,410 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:49:29,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:49:29,411 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:29,540 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 16:49:29,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:29,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:29,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:29,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:49:29,555 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:29,682 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:49:29,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:29,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:29,695 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:49:29,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 16:49:29,697 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:29,819 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:49:29,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:29,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:29,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:29,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:49:29,834 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:29,948 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:49:29,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:29,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:49:29,956 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-05 16:49:30,095 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-06-05 16:49:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:30,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588453420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:30,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:30,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:49:30,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754730234] [2021-06-05 16:49:30,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:49:30,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:30,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:49:30,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:49:30,177 INFO L87 Difference]: Start difference. First operand 2145 states and 7259 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:30,547 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 16:49:30,831 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-06-05 16:49:31,461 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 16:49:31,849 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-06-05 16:49:32,092 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 16:49:32,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:32,349 INFO L93 Difference]: Finished difference Result 2992 states and 9916 transitions. [2021-06-05 16:49:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:49:32,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:32,354 INFO L225 Difference]: With dead ends: 2992 [2021-06-05 16:49:32,354 INFO L226 Difference]: Without dead ends: 2977 [2021-06-05 16:49:32,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2548.9ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:49:32,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2021-06-05 16:49:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2139. [2021-06-05 16:49:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 3.3835360149672593) internal successors, (7234), 2138 states have internal predecessors, (7234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 7234 transitions. [2021-06-05 16:49:32,384 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 7234 transitions. Word has length 26 [2021-06-05 16:49:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:32,384 INFO L482 AbstractCegarLoop]: Abstraction has 2139 states and 7234 transitions. [2021-06-05 16:49:32,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:32,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 7234 transitions. [2021-06-05 16:49:32,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:32,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:32,386 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:32,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3361 [2021-06-05 16:49:32,587 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:32,587 INFO L82 PathProgramCache]: Analyzing trace with hash 28589839, now seen corresponding path program 56 times [2021-06-05 16:49:32,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:32,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954715883] [2021-06-05 16:49:32,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:32,988 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 16:49:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:33,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:33,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954715883] [2021-06-05 16:49:33,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954715883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:33,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905216289] [2021-06-05 16:49:33,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:33,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:49:33,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:33,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:49:33,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:33,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,412 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:49:33,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 57 [2021-06-05 16:49:33,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,430 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 16:49:33,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-06-05 16:49:33,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,447 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 16:49:33,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-06-05 16:49:33,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,459 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:49:33,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 16:49:33,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,477 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:49:33,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 16:49:33,479 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,494 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 16:49:33,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 53 [2021-06-05 16:49:33,495 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,513 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:49:33,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 50 [2021-06-05 16:49:33,514 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,525 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:49:33,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 16:49:33,525 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,536 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:49:33,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 39 [2021-06-05 16:49:33,538 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,548 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:49:33,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-05 16:49:33,549 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,559 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:49:33,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 16:49:33,560 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,571 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:49:33,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 16:49:33,571 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,582 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:49:33,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-05 16:49:33,582 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,593 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:49:33,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-05 16:49:33,593 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:33,612 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 16:49:33,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-06-05 16:49:33,613 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,618 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-06-05 16:49:33,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 54 [2021-06-05 16:49:33,619 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:33,734 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-06-05 16:49:33,734 INFO L628 ElimStorePlain]: treesize reduction 123, result has 39.4 percent of original size [2021-06-05 16:49:33,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:49:33,735 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1445, output treesize:80 [2021-06-05 16:49:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:33,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905216289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:33,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:33,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:49:33,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134389960] [2021-06-05 16:49:33,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:49:33,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:33,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:49:33,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:49:33,884 INFO L87 Difference]: Start difference. First operand 2139 states and 7234 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:34,174 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 16:49:34,857 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 16:49:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:35,353 INFO L93 Difference]: Finished difference Result 2826 states and 9360 transitions. [2021-06-05 16:49:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:49:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:35,357 INFO L225 Difference]: With dead ends: 2826 [2021-06-05 16:49:35,357 INFO L226 Difference]: Without dead ends: 2801 [2021-06-05 16:49:35,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1813.9ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:49:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-06-05 16:49:35,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2126. [2021-06-05 16:49:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.3835294117647057) internal successors, (7190), 2125 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7190 transitions. [2021-06-05 16:49:35,382 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7190 transitions. Word has length 26 [2021-06-05 16:49:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:35,382 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7190 transitions. [2021-06-05 16:49:35,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7190 transitions. [2021-06-05 16:49:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:35,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:35,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:35,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3375 [2021-06-05 16:49:35,586 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:35,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1781836725, now seen corresponding path program 57 times [2021-06-05 16:49:35,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:35,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559209411] [2021-06-05 16:49:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:35,905 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 16:49:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:36,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:36,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559209411] [2021-06-05 16:49:36,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559209411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:36,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008602712] [2021-06-05 16:49:36,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:36,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:49:36,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:36,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:49:36,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:36,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:36,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:36,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:36,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 16:49:36,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:36,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:36,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:36,479 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 16:49:36,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2021-06-05 16:49:36,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:36,847 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-06-05 16:49:36,848 INFO L628 ElimStorePlain]: treesize reduction 12, result has 97.7 percent of original size [2021-06-05 16:49:36,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:36,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:36,864 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 16:49:36,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2021-06-05 16:49:36,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:36,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:36,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:36,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:36,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2021-06-05 16:49:36,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:37,169 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-06-05 16:49:37,170 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.9 percent of original size [2021-06-05 16:49:37,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:37,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:37,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:37,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 56 [2021-06-05 16:49:37,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:37,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:37,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:37,197 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:49:37,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 1 [2021-06-05 16:49:37,198 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:37,305 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:49:37,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:37,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:37,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:37,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:37,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 41 [2021-06-05 16:49:37,323 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:37,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:37,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:37,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:37,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-06-05 16:49:37,337 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:37,604 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 16:49:37,604 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.5 percent of original size [2021-06-05 16:49:37,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:49:37,611 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:559, output treesize:189 [2021-06-05 16:49:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:37,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008602712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:37,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:37,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:49:37,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656961963] [2021-06-05 16:49:37,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:49:37,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:37,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:49:37,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:49:37,802 INFO L87 Difference]: Start difference. First operand 2126 states and 7190 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:38,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:38,939 INFO L93 Difference]: Finished difference Result 2742 states and 9142 transitions. [2021-06-05 16:49:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:49:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:38,943 INFO L225 Difference]: With dead ends: 2742 [2021-06-05 16:49:38,943 INFO L226 Difference]: Without dead ends: 2727 [2021-06-05 16:49:38,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1333.7ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:49:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-06-05 16:49:38,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2126. [2021-06-05 16:49:38,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.3835294117647057) internal successors, (7190), 2125 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7190 transitions. [2021-06-05 16:49:38,970 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7190 transitions. Word has length 26 [2021-06-05 16:49:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:38,970 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7190 transitions. [2021-06-05 16:49:38,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7190 transitions. [2021-06-05 16:49:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:38,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:38,973 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:39,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3383,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:39,174 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:39,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:39,175 INFO L82 PathProgramCache]: Analyzing trace with hash -529489601, now seen corresponding path program 64 times [2021-06-05 16:49:39,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:39,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201793421] [2021-06-05 16:49:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:39,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:39,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201793421] [2021-06-05 16:49:39,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201793421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:39,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068943593] [2021-06-05 16:49:39,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:39,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:49:39,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:39,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:49:39,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:40,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,072 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 16:49:40,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,093 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 1 [2021-06-05 16:49:40,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,124 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:49:40,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 50 [2021-06-05 16:49:40,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,143 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 42 [2021-06-05 16:49:40,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,164 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-05 16:49:40,164 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,192 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-05 16:49:40,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 57 [2021-06-05 16:49:40,194 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,212 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 1 [2021-06-05 16:49:40,212 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,230 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 1 [2021-06-05 16:49:40,231 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,250 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 1 [2021-06-05 16:49:40,251 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,268 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 47 [2021-06-05 16:49:40,270 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,287 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 45 [2021-06-05 16:49:40,289 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,308 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 1 [2021-06-05 16:49:40,309 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,327 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-05 16:49:40,327 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,345 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 1 [2021-06-05 16:49:40,346 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,363 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 16:49:40,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-05 16:49:40,364 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:40,380 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 16:49:40,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 119 treesize of output 55 [2021-06-05 16:49:40,381 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:40,429 INFO L628 ElimStorePlain]: treesize reduction 74, result has 35.7 percent of original size [2021-06-05 16:49:40,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:49:40,430 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1653, output treesize:29 [2021-06-05 16:49:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:40,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068943593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:40,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:40,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:49:40,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719437553] [2021-06-05 16:49:40,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:49:40,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:40,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:49:40,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:49:40,475 INFO L87 Difference]: Start difference. First operand 2126 states and 7190 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:41,938 INFO L93 Difference]: Finished difference Result 2821 states and 9363 transitions. [2021-06-05 16:49:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:49:41,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:41,942 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 16:49:41,942 INFO L226 Difference]: Without dead ends: 2799 [2021-06-05 16:49:41,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1599.7ms TimeCoverageRelationStatistics Valid=289, Invalid=1043, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:49:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-06-05 16:49:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2120. [2021-06-05 16:49:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.382255781028787) internal successors, (7167), 2119 states have internal predecessors, (7167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7167 transitions. [2021-06-05 16:49:41,969 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7167 transitions. Word has length 26 [2021-06-05 16:49:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:41,969 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7167 transitions. [2021-06-05 16:49:41,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7167 transitions. [2021-06-05 16:49:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:41,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:41,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:42,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3402,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:42,171 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:42,172 INFO L82 PathProgramCache]: Analyzing trace with hash -815414513, now seen corresponding path program 65 times [2021-06-05 16:49:42,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:42,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530092481] [2021-06-05 16:49:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:42,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:42,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530092481] [2021-06-05 16:49:42,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530092481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:42,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858141362] [2021-06-05 16:49:42,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:42,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:49:42,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:42,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:49:42,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:42,921 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 16:49:42,974 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_493], 5=[v_prenex_491, v_prenex_495]} [2021-06-05 16:49:42,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:42,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:42,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:42,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:42,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-05 16:49:42,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:42,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:42,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:42,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:42,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 16:49:42,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:43,129 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-05 16:49:43,130 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-06-05 16:49:43,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:43,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:43,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-06-05 16:49:43,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:43,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:43,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:43,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:43,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:43,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-06-05 16:49:43,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:43,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:43,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:43,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:43,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:43,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:49:43,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 24 [2021-06-05 16:49:43,235 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:43,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:43,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:49:43,274 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-06-05 16:49:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:43,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858141362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:43,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:43,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:49:43,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055702442] [2021-06-05 16:49:43,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:49:43,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:43,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:49:43,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:49:43,322 INFO L87 Difference]: Start difference. First operand 2120 states and 7167 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:44,614 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 16:49:44,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:44,727 INFO L93 Difference]: Finished difference Result 2661 states and 8818 transitions. [2021-06-05 16:49:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:49:44,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:44,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:44,732 INFO L225 Difference]: With dead ends: 2661 [2021-06-05 16:49:44,732 INFO L226 Difference]: Without dead ends: 2642 [2021-06-05 16:49:44,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1605.6ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:49:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-05 16:49:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2120. [2021-06-05 16:49:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.381311939594148) internal successors, (7165), 2119 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:44,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7165 transitions. [2021-06-05 16:49:44,759 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7165 transitions. Word has length 26 [2021-06-05 16:49:44,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:44,759 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7165 transitions. [2021-06-05 16:49:44,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7165 transitions. [2021-06-05 16:49:44,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:49:44,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:44,761 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:44,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3460,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:44,962 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:44,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:44,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1107808399, now seen corresponding path program 66 times [2021-06-05 16:49:44,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:44,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001501659] [2021-06-05 16:49:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:45,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:45,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001501659] [2021-06-05 16:49:45,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001501659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:45,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336665250] [2021-06-05 16:49:45,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:45,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:49:45,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:45,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:49:45,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:45,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,591 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-06-05 16:49:45,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 55 [2021-06-05 16:49:45,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,628 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:49:45,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 43 [2021-06-05 16:49:45,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,659 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:49:45,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 40 [2021-06-05 16:49:45,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,689 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-05 16:49:45,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 42 [2021-06-05 16:49:45,691 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,709 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:45,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 16:49:45,710 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,747 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-06-05 16:49:45,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 55 [2021-06-05 16:49:45,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,768 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:45,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 16:49:45,770 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:49:45,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 71 [2021-06-05 16:49:45,809 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,828 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:45,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 26 [2021-06-05 16:49:45,830 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,859 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 16:49:45,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 42 [2021-06-05 16:49:45,861 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,881 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:45,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:49:45,882 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,902 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:45,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 16:49:45,902 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,921 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:45,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 1 [2021-06-05 16:49:45,922 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,941 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:45,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 1 [2021-06-05 16:49:45,942 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,961 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:45,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 1 [2021-06-05 16:49:45,962 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:45,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:49:45,973 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:49:45,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 1 [2021-06-05 16:49:45,974 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:49:46,094 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 21 [2021-06-05 16:49:46,094 INFO L628 ElimStorePlain]: treesize reduction 255, result has 17.7 percent of original size [2021-06-05 16:49:46,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:49:46,095 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1081, output treesize:55 [2021-06-05 16:49:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:46,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336665250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:46,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:46,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:49:46,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856407257] [2021-06-05 16:49:46,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:49:46,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:46,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:49:46,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:49:46,203 INFO L87 Difference]: Start difference. First operand 2120 states and 7165 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:47,656 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-05 16:49:47,802 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 16:49:48,119 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 16:49:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:48,397 INFO L93 Difference]: Finished difference Result 2604 states and 8571 transitions. [2021-06-05 16:49:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:49:48,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:49:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:48,400 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 16:49:48,400 INFO L226 Difference]: Without dead ends: 2574 [2021-06-05 16:49:48,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2265.2ms TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:49:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-06-05 16:49:48,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2120. [2021-06-05 16:49:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.381311939594148) internal successors, (7165), 2119 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7165 transitions. [2021-06-05 16:49:48,424 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7165 transitions. Word has length 26 [2021-06-05 16:49:48,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:48,425 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7165 transitions. [2021-06-05 16:49:48,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7165 transitions. [2021-06-05 16:49:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:49:48,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:48,427 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:48,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3474 [2021-06-05 16:49:48,627 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:48,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1424792101, now seen corresponding path program 58 times [2021-06-05 16:49:48,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:48,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916446334] [2021-06-05 16:49:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:48,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:48,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916446334] [2021-06-05 16:49:48,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916446334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:48,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370872310] [2021-06-05 16:49:48,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:48,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:49:48,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:48,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:49:48,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:48,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370872310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:48,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:48,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:49:48,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954310717] [2021-06-05 16:49:48,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:49:48,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:48,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:49:48,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:49:48,797 INFO L87 Difference]: Start difference. First operand 2120 states and 7165 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:49,753 INFO L93 Difference]: Finished difference Result 5051 states and 15656 transitions. [2021-06-05 16:49:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:49:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:49:49,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:49,760 INFO L225 Difference]: With dead ends: 5051 [2021-06-05 16:49:49,760 INFO L226 Difference]: Without dead ends: 5051 [2021-06-05 16:49:49,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 578.6ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:49:49,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-05 16:49:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 2317. [2021-06-05 16:49:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.435233160621762) internal successors, (7956), 2316 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7956 transitions. [2021-06-05 16:49:49,799 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7956 transitions. Word has length 28 [2021-06-05 16:49:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:49,799 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 7956 transitions. [2021-06-05 16:49:49,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:49,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7956 transitions. [2021-06-05 16:49:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:49:49,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:49,802 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:50,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3503,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:50,003 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:50,003 INFO L82 PathProgramCache]: Analyzing trace with hash 448473257, now seen corresponding path program 59 times [2021-06-05 16:49:50,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:50,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799117702] [2021-06-05 16:49:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:50,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:50,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799117702] [2021-06-05 16:49:50,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799117702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:50,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078709101] [2021-06-05 16:49:50,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:50,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:49:50,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:50,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:49:50,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:50,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078709101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:50,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:50,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:49:50,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797440912] [2021-06-05 16:49:50,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:49:50,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:50,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:49:50,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:49:50,185 INFO L87 Difference]: Start difference. First operand 2317 states and 7956 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:51,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:51,456 INFO L93 Difference]: Finished difference Result 6617 states and 20175 transitions. [2021-06-05 16:49:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:49:51,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:49:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:51,465 INFO L225 Difference]: With dead ends: 6617 [2021-06-05 16:49:51,465 INFO L226 Difference]: Without dead ends: 6617 [2021-06-05 16:49:51,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 766.4ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:49:51,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-06-05 16:49:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2331. [2021-06-05 16:49:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.4437768240343347) internal successors, (8024), 2330 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 8024 transitions. [2021-06-05 16:49:51,513 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 8024 transitions. Word has length 28 [2021-06-05 16:49:51,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:51,513 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 8024 transitions. [2021-06-05 16:49:51,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:51,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 8024 transitions. [2021-06-05 16:49:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:49:51,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:51,516 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:51,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3504 [2021-06-05 16:49:51,725 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:51,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1977377901, now seen corresponding path program 60 times [2021-06-05 16:49:51,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:51,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057796022] [2021-06-05 16:49:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:51,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:51,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057796022] [2021-06-05 16:49:51,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057796022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:51,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848939700] [2021-06-05 16:49:51,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:51,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:49:51,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:51,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:49:51,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:51,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848939700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:51,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:51,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:49:51,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441715422] [2021-06-05 16:49:51,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:49:51,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:51,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:49:51,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:49:51,909 INFO L87 Difference]: Start difference. First operand 2331 states and 8024 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:53,193 INFO L93 Difference]: Finished difference Result 6008 states and 18701 transitions. [2021-06-05 16:49:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:49:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:49:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:53,201 INFO L225 Difference]: With dead ends: 6008 [2021-06-05 16:49:53,202 INFO L226 Difference]: Without dead ends: 6008 [2021-06-05 16:49:53,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 764.6ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 16:49:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6008 states. [2021-06-05 16:49:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6008 to 2276. [2021-06-05 16:49:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.418901098901099) internal successors, (7778), 2275 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 7778 transitions. [2021-06-05 16:49:53,249 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 7778 transitions. Word has length 28 [2021-06-05 16:49:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:53,250 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 7778 transitions. [2021-06-05 16:49:53,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 7778 transitions. [2021-06-05 16:49:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:49:53,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:53,252 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:53,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3505,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:53,457 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1153995099, now seen corresponding path program 61 times [2021-06-05 16:49:53,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:53,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912973641] [2021-06-05 16:49:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:53,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:53,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912973641] [2021-06-05 16:49:53,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912973641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:53,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709227616] [2021-06-05 16:49:53,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:53,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:49:53,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:53,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709227616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:53,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:53,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:49:53,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453886784] [2021-06-05 16:49:53,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:49:53,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:53,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:49:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:49:53,630 INFO L87 Difference]: Start difference. First operand 2276 states and 7778 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:54,713 INFO L93 Difference]: Finished difference Result 5144 states and 15840 transitions. [2021-06-05 16:49:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:49:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:49:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:54,720 INFO L225 Difference]: With dead ends: 5144 [2021-06-05 16:49:54,720 INFO L226 Difference]: Without dead ends: 5144 [2021-06-05 16:49:54,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 673.9ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:49:54,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-06-05 16:49:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 2286. [2021-06-05 16:49:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 3.415317286652079) internal successors, (7804), 2285 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:54,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 7804 transitions. [2021-06-05 16:49:54,767 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 7804 transitions. Word has length 28 [2021-06-05 16:49:54,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:54,767 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 7804 transitions. [2021-06-05 16:49:54,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:54,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 7804 transitions. [2021-06-05 16:49:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:49:54,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:54,770 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:54,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3506 [2021-06-05 16:49:54,985 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:54,985 INFO L82 PathProgramCache]: Analyzing trace with hash 987823393, now seen corresponding path program 67 times [2021-06-05 16:49:54,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:54,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171512151] [2021-06-05 16:49:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:55,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:55,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171512151] [2021-06-05 16:49:55,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171512151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:55,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234588535] [2021-06-05 16:49:55,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:55,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:49:55,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:55,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234588535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:55,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:55,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:49:55,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265059912] [2021-06-05 16:49:55,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:49:55,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:55,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:49:55,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:49:55,146 INFO L87 Difference]: Start difference. First operand 2286 states and 7804 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:55,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:55,741 INFO L93 Difference]: Finished difference Result 4580 states and 14284 transitions. [2021-06-05 16:49:55,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:49:55,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:49:55,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:55,747 INFO L225 Difference]: With dead ends: 4580 [2021-06-05 16:49:55,747 INFO L226 Difference]: Without dead ends: 4580 [2021-06-05 16:49:55,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:49:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4580 states. [2021-06-05 16:49:55,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4580 to 2356. [2021-06-05 16:49:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.4) internal successors, (8007), 2355 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:55,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8007 transitions. [2021-06-05 16:49:55,786 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8007 transitions. Word has length 28 [2021-06-05 16:49:55,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:55,786 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 8007 transitions. [2021-06-05 16:49:55,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:55,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8007 transitions. [2021-06-05 16:49:55,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:49:55,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:55,789 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:55,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3507 [2021-06-05 16:49:55,991 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash 846454761, now seen corresponding path program 62 times [2021-06-05 16:49:55,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:55,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768438455] [2021-06-05 16:49:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:49:56,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:56,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768438455] [2021-06-05 16:49:56,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768438455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:56,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703057866] [2021-06-05 16:49:56,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:56,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:49:56,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:56,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:49:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:49:56,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703057866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:56,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:56,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:49:56,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829480249] [2021-06-05 16:49:56,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:49:56,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:56,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:49:56,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:49:56,106 INFO L87 Difference]: Start difference. First operand 2356 states and 8007 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:56,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:56,290 INFO L93 Difference]: Finished difference Result 3884 states and 12614 transitions. [2021-06-05 16:49:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:49:56,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:49:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:56,296 INFO L225 Difference]: With dead ends: 3884 [2021-06-05 16:49:56,296 INFO L226 Difference]: Without dead ends: 3866 [2021-06-05 16:49:56,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:49:56,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2021-06-05 16:49:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 2736. [2021-06-05 16:49:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 3.4661791590493602) internal successors, (9480), 2735 states have internal predecessors, (9480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 9480 transitions. [2021-06-05 16:49:56,335 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 9480 transitions. Word has length 28 [2021-06-05 16:49:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:56,335 INFO L482 AbstractCegarLoop]: Abstraction has 2736 states and 9480 transitions. [2021-06-05 16:49:56,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 9480 transitions. [2021-06-05 16:49:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:49:56,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:56,338 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:56,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3508 [2021-06-05 16:49:56,539 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:56,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:56,539 INFO L82 PathProgramCache]: Analyzing trace with hash 409486053, now seen corresponding path program 63 times [2021-06-05 16:49:56,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:56,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324618904] [2021-06-05 16:49:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:56,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:56,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324618904] [2021-06-05 16:49:56,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324618904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:56,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451317498] [2021-06-05 16:49:56,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:56,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:49:56,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:56,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:49:56,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:56,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451317498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:56,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:56,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:49:56,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265071291] [2021-06-05 16:49:56,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:49:56,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:56,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:49:56,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:49:56,681 INFO L87 Difference]: Start difference. First operand 2736 states and 9480 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:57,293 INFO L93 Difference]: Finished difference Result 4561 states and 14499 transitions. [2021-06-05 16:49:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:49:57,293 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:49:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:57,299 INFO L225 Difference]: With dead ends: 4561 [2021-06-05 16:49:57,299 INFO L226 Difference]: Without dead ends: 4514 [2021-06-05 16:49:57,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 375.5ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:49:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2021-06-05 16:49:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 2898. [2021-06-05 16:49:57,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 3.486365205384881) internal successors, (10100), 2897 states have internal predecessors, (10100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 10100 transitions. [2021-06-05 16:49:57,345 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 10100 transitions. Word has length 28 [2021-06-05 16:49:57,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:57,345 INFO L482 AbstractCegarLoop]: Abstraction has 2898 states and 10100 transitions. [2021-06-05 16:49:57,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:57,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 10100 transitions. [2021-06-05 16:49:57,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:49:57,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:57,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:57,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3509,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:57,565 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:57,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1945575529, now seen corresponding path program 64 times [2021-06-05 16:49:57,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:57,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535381229] [2021-06-05 16:49:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:57,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:57,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535381229] [2021-06-05 16:49:57,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535381229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:57,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121890259] [2021-06-05 16:49:57,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:57,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:49:57,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:57,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:49:57,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:57,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121890259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:57,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:57,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:49:57,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673294358] [2021-06-05 16:49:57,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:49:57,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:49:57,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:49:57,745 INFO L87 Difference]: Start difference. First operand 2898 states and 10100 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:58,506 INFO L93 Difference]: Finished difference Result 4846 states and 15131 transitions. [2021-06-05 16:49:58,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:49:58,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:49:58,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:58,513 INFO L225 Difference]: With dead ends: 4846 [2021-06-05 16:49:58,513 INFO L226 Difference]: Without dead ends: 4820 [2021-06-05 16:49:58,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:49:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4820 states. [2021-06-05 16:49:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4820 to 2913. [2021-06-05 16:49:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.4903846153846154) internal successors, (10164), 2912 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10164 transitions. [2021-06-05 16:49:58,575 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10164 transitions. Word has length 28 [2021-06-05 16:49:58,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:58,575 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10164 transitions. [2021-06-05 16:49:58,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:58,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10164 transitions. [2021-06-05 16:49:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:49:58,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:58,578 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:58,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3510,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:58,779 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:58,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:58,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1676978985, now seen corresponding path program 65 times [2021-06-05 16:49:58,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:58,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357794221] [2021-06-05 16:49:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:58,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:58,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357794221] [2021-06-05 16:49:58,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357794221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:58,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329930867] [2021-06-05 16:49:58,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:58,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:49:58,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:58,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:49:58,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:49:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:58,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329930867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:58,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:49:58,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:49:58,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552124946] [2021-06-05 16:49:58,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:49:58,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:49:58,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:49:58,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:49:58,942 INFO L87 Difference]: Start difference. First operand 2913 states and 10164 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:49:59,647 INFO L93 Difference]: Finished difference Result 4838 states and 15131 transitions. [2021-06-05 16:49:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:49:59,648 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:49:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:49:59,654 INFO L225 Difference]: With dead ends: 4838 [2021-06-05 16:49:59,655 INFO L226 Difference]: Without dead ends: 4823 [2021-06-05 16:49:59,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:49:59,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2021-06-05 16:49:59,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 2913. [2021-06-05 16:49:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.48592032967033) internal successors, (10151), 2912 states have internal predecessors, (10151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10151 transitions. [2021-06-05 16:49:59,701 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10151 transitions. Word has length 28 [2021-06-05 16:49:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:49:59,701 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10151 transitions. [2021-06-05 16:49:59,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:49:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10151 transitions. [2021-06-05 16:49:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:49:59,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:49:59,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:49:59,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3511 [2021-06-05 16:49:59,905 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:49:59,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:49:59,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1569189389, now seen corresponding path program 66 times [2021-06-05 16:49:59,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:49:59,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908678048] [2021-06-05 16:49:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:49:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:49:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:49:59,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:49:59,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908678048] [2021-06-05 16:49:59,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908678048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:49:59,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809877704] [2021-06-05 16:49:59,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:49:59,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:49:59,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:49:59,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:49:59,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:00,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809877704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:00,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:00,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:50:00,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107941089] [2021-06-05 16:50:00,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:50:00,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:00,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:50:00,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:50:00,051 INFO L87 Difference]: Start difference. First operand 2913 states and 10151 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:00,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:00,598 INFO L93 Difference]: Finished difference Result 5599 states and 17892 transitions. [2021-06-05 16:50:00,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:50:00,599 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:00,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:00,606 INFO L225 Difference]: With dead ends: 5599 [2021-06-05 16:50:00,606 INFO L226 Difference]: Without dead ends: 5552 [2021-06-05 16:50:00,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:50:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-06-05 16:50:00,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 3063. [2021-06-05 16:50:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 3.5303723056825604) internal successors, (10810), 3062 states have internal predecessors, (10810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 10810 transitions. [2021-06-05 16:50:00,663 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 10810 transitions. Word has length 28 [2021-06-05 16:50:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:00,663 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 10810 transitions. [2021-06-05 16:50:00,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 10810 transitions. [2021-06-05 16:50:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:00,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:00,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:00,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3512,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:00,867 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:00,867 INFO L82 PathProgramCache]: Analyzing trace with hash -641999155, now seen corresponding path program 67 times [2021-06-05 16:50:00,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:00,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194152739] [2021-06-05 16:50:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:00,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:00,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194152739] [2021-06-05 16:50:00,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194152739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:00,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587781601] [2021-06-05 16:50:00,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:00,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:50:00,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:00,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587781601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:00,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:00,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:50:00,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660818721] [2021-06-05 16:50:00,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:50:00,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:00,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:50:00,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:50:00,980 INFO L87 Difference]: Start difference. First operand 3063 states and 10810 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:01,147 INFO L93 Difference]: Finished difference Result 4390 states and 14427 transitions. [2021-06-05 16:50:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:50:01,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:01,154 INFO L225 Difference]: With dead ends: 4390 [2021-06-05 16:50:01,154 INFO L226 Difference]: Without dead ends: 4390 [2021-06-05 16:50:01,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:50:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2021-06-05 16:50:01,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 2947. [2021-06-05 16:50:01,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2946 states have (on average 3.5020366598778003) internal successors, (10317), 2946 states have internal predecessors, (10317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 10317 transitions. [2021-06-05 16:50:01,203 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 10317 transitions. Word has length 28 [2021-06-05 16:50:01,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:01,203 INFO L482 AbstractCegarLoop]: Abstraction has 2947 states and 10317 transitions. [2021-06-05 16:50:01,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:01,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 10317 transitions. [2021-06-05 16:50:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:01,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:01,207 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:01,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3513,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:01,408 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:01,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1988680721, now seen corresponding path program 68 times [2021-06-05 16:50:01,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:01,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919234769] [2021-06-05 16:50:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:01,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:01,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919234769] [2021-06-05 16:50:01,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919234769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:01,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75030459] [2021-06-05 16:50:01,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:01,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:01,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:01,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:01,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:01,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75030459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:01,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:01,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:50:01,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178701384] [2021-06-05 16:50:01,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:50:01,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:01,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:50:01,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:50:01,565 INFO L87 Difference]: Start difference. First operand 2947 states and 10317 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:02,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:02,276 INFO L93 Difference]: Finished difference Result 6294 states and 19912 transitions. [2021-06-05 16:50:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:50:02,276 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:02,286 INFO L225 Difference]: With dead ends: 6294 [2021-06-05 16:50:02,286 INFO L226 Difference]: Without dead ends: 6294 [2021-06-05 16:50:02,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:50:02,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2021-06-05 16:50:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 2965. [2021-06-05 16:50:02,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 3.5020242914979756) internal successors, (10380), 2964 states have internal predecessors, (10380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 10380 transitions. [2021-06-05 16:50:02,351 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 10380 transitions. Word has length 28 [2021-06-05 16:50:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:02,351 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 10380 transitions. [2021-06-05 16:50:02,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 10380 transitions. [2021-06-05 16:50:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:02,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:02,354 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:02,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3514 [2021-06-05 16:50:02,555 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:02,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:02,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1203766627, now seen corresponding path program 69 times [2021-06-05 16:50:02,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:02,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537581360] [2021-06-05 16:50:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:02,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:02,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537581360] [2021-06-05 16:50:02,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537581360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:02,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099953457] [2021-06-05 16:50:02,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:02,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:50:02,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:02,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:02,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:02,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099953457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:02,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:02,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:50:02,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971453863] [2021-06-05 16:50:02,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:50:02,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:02,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:50:02,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:50:02,720 INFO L87 Difference]: Start difference. First operand 2965 states and 10380 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:03,565 INFO L93 Difference]: Finished difference Result 6549 states and 20685 transitions. [2021-06-05 16:50:03,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:50:03,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:03,576 INFO L225 Difference]: With dead ends: 6549 [2021-06-05 16:50:03,576 INFO L226 Difference]: Without dead ends: 6549 [2021-06-05 16:50:03,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:50:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6549 states. [2021-06-05 16:50:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6549 to 3059. [2021-06-05 16:50:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 3.4947678221059517) internal successors, (10687), 3058 states have internal predecessors, (10687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 10687 transitions. [2021-06-05 16:50:03,643 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 10687 transitions. Word has length 28 [2021-06-05 16:50:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:03,643 INFO L482 AbstractCegarLoop]: Abstraction has 3059 states and 10687 transitions. [2021-06-05 16:50:03,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:03,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 10687 transitions. [2021-06-05 16:50:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:03,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:03,647 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:03,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3515,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:03,848 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:03,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2008178013, now seen corresponding path program 70 times [2021-06-05 16:50:03,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:03,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793246920] [2021-06-05 16:50:03,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:03,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:03,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793246920] [2021-06-05 16:50:03,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793246920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:03,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655545590] [2021-06-05 16:50:03,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:03,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:03,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:03,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:50:03,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:03,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655545590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:03,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:03,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:50:03,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667408525] [2021-06-05 16:50:03,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:50:03,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:03,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:50:03,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:50:03,978 INFO L87 Difference]: Start difference. First operand 3059 states and 10687 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:04,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:04,626 INFO L93 Difference]: Finished difference Result 6709 states and 21196 transitions. [2021-06-05 16:50:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:50:04,626 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:04,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:04,635 INFO L225 Difference]: With dead ends: 6709 [2021-06-05 16:50:04,636 INFO L226 Difference]: Without dead ends: 6673 [2021-06-05 16:50:04,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 382.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:50:04,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6673 states. [2021-06-05 16:50:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6673 to 3461. [2021-06-05 16:50:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3461 states, 3460 states have (on average 3.5245664739884393) internal successors, (12195), 3460 states have internal predecessors, (12195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3461 states to 3461 states and 12195 transitions. [2021-06-05 16:50:04,709 INFO L78 Accepts]: Start accepts. Automaton has 3461 states and 12195 transitions. Word has length 28 [2021-06-05 16:50:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:04,709 INFO L482 AbstractCegarLoop]: Abstraction has 3461 states and 12195 transitions. [2021-06-05 16:50:04,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3461 states and 12195 transitions. [2021-06-05 16:50:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:04,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:04,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:04,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3516 [2021-06-05 16:50:04,914 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:04,914 INFO L82 PathProgramCache]: Analyzing trace with hash -815711165, now seen corresponding path program 71 times [2021-06-05 16:50:04,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:04,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357477258] [2021-06-05 16:50:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:04,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:04,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357477258] [2021-06-05 16:50:04,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357477258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:04,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056832906] [2021-06-05 16:50:04,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:04,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:50:04,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:04,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:50:04,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:05,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056832906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:05,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:05,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:50:05,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589527914] [2021-06-05 16:50:05,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:50:05,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:05,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:50:05,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:50:05,049 INFO L87 Difference]: Start difference. First operand 3461 states and 12195 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:05,669 INFO L93 Difference]: Finished difference Result 6846 states and 21557 transitions. [2021-06-05 16:50:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:50:05,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:05,679 INFO L225 Difference]: With dead ends: 6846 [2021-06-05 16:50:05,679 INFO L226 Difference]: Without dead ends: 6846 [2021-06-05 16:50:05,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:50:05,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2021-06-05 16:50:05,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 3175. [2021-06-05 16:50:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 3.484247006931317) internal successors, (11059), 3174 states have internal predecessors, (11059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 11059 transitions. [2021-06-05 16:50:05,749 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 11059 transitions. Word has length 28 [2021-06-05 16:50:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:05,749 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 11059 transitions. [2021-06-05 16:50:05,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:05,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 11059 transitions. [2021-06-05 16:50:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:05,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:05,752 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:05,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3517 [2021-06-05 16:50:05,953 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:05,953 INFO L82 PathProgramCache]: Analyzing trace with hash -257646883, now seen corresponding path program 72 times [2021-06-05 16:50:05,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:05,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623714894] [2021-06-05 16:50:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:05,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:05,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623714894] [2021-06-05 16:50:05,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623714894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:05,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703987091] [2021-06-05 16:50:05,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:06,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:50:06,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:06,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:06,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:06,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703987091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:06,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:06,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:50:06,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887494014] [2021-06-05 16:50:06,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:50:06,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:06,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:50:06,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:50:06,090 INFO L87 Difference]: Start difference. First operand 3175 states and 11059 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:06,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:06,865 INFO L93 Difference]: Finished difference Result 6061 states and 19490 transitions. [2021-06-05 16:50:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:50:06,865 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:06,875 INFO L225 Difference]: With dead ends: 6061 [2021-06-05 16:50:06,875 INFO L226 Difference]: Without dead ends: 6057 [2021-06-05 16:50:06,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 405.6ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:50:06,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6057 states. [2021-06-05 16:50:06,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6057 to 2935. [2021-06-05 16:50:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.507498295841854) internal successors, (10291), 2934 states have internal predecessors, (10291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 10291 transitions. [2021-06-05 16:50:06,934 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 10291 transitions. Word has length 28 [2021-06-05 16:50:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:06,934 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 10291 transitions. [2021-06-05 16:50:06,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 10291 transitions. [2021-06-05 16:50:06,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:06,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:06,938 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:07,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3518 [2021-06-05 16:50:07,138 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:07,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1520596959, now seen corresponding path program 73 times [2021-06-05 16:50:07,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:07,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362027602] [2021-06-05 16:50:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:07,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:07,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362027602] [2021-06-05 16:50:07,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362027602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:07,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865014928] [2021-06-05 16:50:07,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:07,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:07,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865014928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:07,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:07,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:50:07,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173831533] [2021-06-05 16:50:07,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:50:07,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:07,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:50:07,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:50:07,300 INFO L87 Difference]: Start difference. First operand 2935 states and 10291 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:08,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:08,388 INFO L93 Difference]: Finished difference Result 9324 states and 30354 transitions. [2021-06-05 16:50:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:50:08,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:08,403 INFO L225 Difference]: With dead ends: 9324 [2021-06-05 16:50:08,403 INFO L226 Difference]: Without dead ends: 9324 [2021-06-05 16:50:08,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 637.5ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:50:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2021-06-05 16:50:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 3117. [2021-06-05 16:50:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 3.5805519897304237) internal successors, (11157), 3116 states have internal predecessors, (11157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:08,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 11157 transitions. [2021-06-05 16:50:08,491 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 11157 transitions. Word has length 28 [2021-06-05 16:50:08,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:08,491 INFO L482 AbstractCegarLoop]: Abstraction has 3117 states and 11157 transitions. [2021-06-05 16:50:08,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 11157 transitions. [2021-06-05 16:50:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:08,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:08,495 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:08,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3519,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:08,696 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:08,696 INFO L82 PathProgramCache]: Analyzing trace with hash 8307685, now seen corresponding path program 74 times [2021-06-05 16:50:08,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:08,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826055018] [2021-06-05 16:50:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:08,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:08,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826055018] [2021-06-05 16:50:08,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826055018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:08,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254061162] [2021-06-05 16:50:08,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:08,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:08,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:08,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:08,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:08,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254061162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:08,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:08,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:50:08,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886495314] [2021-06-05 16:50:08,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:50:08,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:08,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:50:08,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:50:08,854 INFO L87 Difference]: Start difference. First operand 3117 states and 11157 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:09,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:09,892 INFO L93 Difference]: Finished difference Result 9147 states and 29872 transitions. [2021-06-05 16:50:09,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:50:09,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:09,907 INFO L225 Difference]: With dead ends: 9147 [2021-06-05 16:50:09,907 INFO L226 Difference]: Without dead ends: 9147 [2021-06-05 16:50:09,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:50:09,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9147 states. [2021-06-05 16:50:09,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9147 to 3083. [2021-06-05 16:50:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3082 states have (on average 3.562621674237508) internal successors, (10980), 3082 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 10980 transitions. [2021-06-05 16:50:10,001 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 10980 transitions. Word has length 28 [2021-06-05 16:50:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:10,001 INFO L482 AbstractCegarLoop]: Abstraction has 3083 states and 10980 transitions. [2021-06-05 16:50:10,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 10980 transitions. [2021-06-05 16:50:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:10,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:10,005 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:10,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:10,205 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:10,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2125990737, now seen corresponding path program 75 times [2021-06-05 16:50:10,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:10,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328451956] [2021-06-05 16:50:10,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:10,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:10,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328451956] [2021-06-05 16:50:10,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328451956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:10,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968040252] [2021-06-05 16:50:10,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:10,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:50:10,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:10,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:10,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:10,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968040252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:10,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:10,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:50:10,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065230865] [2021-06-05 16:50:10,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:50:10,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:10,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:50:10,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:50:10,358 INFO L87 Difference]: Start difference. First operand 3083 states and 10980 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:11,329 INFO L93 Difference]: Finished difference Result 8583 states and 27105 transitions. [2021-06-05 16:50:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:50:11,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:11,342 INFO L225 Difference]: With dead ends: 8583 [2021-06-05 16:50:11,342 INFO L226 Difference]: Without dead ends: 8583 [2021-06-05 16:50:11,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:50:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8583 states. [2021-06-05 16:50:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8583 to 3103. [2021-06-05 16:50:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 3.5660863958736297) internal successors, (11062), 3102 states have internal predecessors, (11062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 11062 transitions. [2021-06-05 16:50:11,427 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 11062 transitions. Word has length 28 [2021-06-05 16:50:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:11,427 INFO L482 AbstractCegarLoop]: Abstraction has 3103 states and 11062 transitions. [2021-06-05 16:50:11,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 11062 transitions. [2021-06-05 16:50:11,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:11,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:11,431 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:11,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:11,631 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:11,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:11,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1053673763, now seen corresponding path program 76 times [2021-06-05 16:50:11,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:11,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564137801] [2021-06-05 16:50:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:11,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:11,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564137801] [2021-06-05 16:50:11,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564137801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:11,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075364471] [2021-06-05 16:50:11,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:11,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:11,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:11,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:11,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:11,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075364471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:11,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:11,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:50:11,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172085049] [2021-06-05 16:50:11,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:50:11,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:11,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:50:11,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:50:11,774 INFO L87 Difference]: Start difference. First operand 3103 states and 11062 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:12,665 INFO L93 Difference]: Finished difference Result 8084 states and 25895 transitions. [2021-06-05 16:50:12,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:50:12,665 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:12,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:12,678 INFO L225 Difference]: With dead ends: 8084 [2021-06-05 16:50:12,679 INFO L226 Difference]: Without dead ends: 8076 [2021-06-05 16:50:12,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 499.0ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:50:12,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-05 16:50:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 3085. [2021-06-05 16:50:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.5619325551232164) internal successors, (10985), 3084 states have internal predecessors, (10985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 10985 transitions. [2021-06-05 16:50:12,776 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 10985 transitions. Word has length 28 [2021-06-05 16:50:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:12,776 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 10985 transitions. [2021-06-05 16:50:12,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 10985 transitions. [2021-06-05 16:50:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:12,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:12,780 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:12,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:12,981 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:12,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:12,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1235475809, now seen corresponding path program 77 times [2021-06-05 16:50:12,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:12,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336240558] [2021-06-05 16:50:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:13,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:13,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336240558] [2021-06-05 16:50:13,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336240558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:13,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180934770] [2021-06-05 16:50:13,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:13,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:50:13,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:13,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180934770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:13,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:13,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:50:13,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027960830] [2021-06-05 16:50:13,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:50:13,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:13,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:50:13,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:50:13,138 INFO L87 Difference]: Start difference. First operand 3085 states and 10985 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:14,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:14,145 INFO L93 Difference]: Finished difference Result 8010 states and 25668 transitions. [2021-06-05 16:50:14,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 16:50:14,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:14,159 INFO L225 Difference]: With dead ends: 8010 [2021-06-05 16:50:14,159 INFO L226 Difference]: Without dead ends: 8010 [2021-06-05 16:50:14,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 545.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:50:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2021-06-05 16:50:14,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 3101. [2021-06-05 16:50:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.5641935483870966) internal successors, (11049), 3100 states have internal predecessors, (11049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 11049 transitions. [2021-06-05 16:50:14,240 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 11049 transitions. Word has length 28 [2021-06-05 16:50:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:14,241 INFO L482 AbstractCegarLoop]: Abstraction has 3101 states and 11049 transitions. [2021-06-05 16:50:14,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:14,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 11049 transitions. [2021-06-05 16:50:14,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:14,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:14,266 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:14,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3523 [2021-06-05 16:50:14,466 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash 180098415, now seen corresponding path program 78 times [2021-06-05 16:50:14,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:14,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103967335] [2021-06-05 16:50:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:14,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:14,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103967335] [2021-06-05 16:50:14,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103967335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:14,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272005374] [2021-06-05 16:50:14,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:14,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:50:14,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:14,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:14,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:14,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272005374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:14,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:14,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:50:14,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574123566] [2021-06-05 16:50:14,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:50:14,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:14,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:50:14,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:50:14,626 INFO L87 Difference]: Start difference. First operand 3101 states and 11049 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:15,617 INFO L93 Difference]: Finished difference Result 7678 states and 24884 transitions. [2021-06-05 16:50:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:50:15,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:15,628 INFO L225 Difference]: With dead ends: 7678 [2021-06-05 16:50:15,628 INFO L226 Difference]: Without dead ends: 7670 [2021-06-05 16:50:15,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 527.1ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:50:15,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7670 states. [2021-06-05 16:50:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7670 to 2858. [2021-06-05 16:50:15,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2857 states have (on average 3.4816240812040604) internal successors, (9947), 2857 states have internal predecessors, (9947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 9947 transitions. [2021-06-05 16:50:15,696 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 9947 transitions. Word has length 28 [2021-06-05 16:50:15,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:15,696 INFO L482 AbstractCegarLoop]: Abstraction has 2858 states and 9947 transitions. [2021-06-05 16:50:15,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:15,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 9947 transitions. [2021-06-05 16:50:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:15,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:15,699 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:15,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3524,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:15,900 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:15,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:15,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1618231897, now seen corresponding path program 79 times [2021-06-05 16:50:15,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:15,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518255076] [2021-06-05 16:50:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:15,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:15,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518255076] [2021-06-05 16:50:15,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518255076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:15,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206310757] [2021-06-05 16:50:15,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:15,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:15,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:16,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206310757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:16,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:16,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:50:16,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399897522] [2021-06-05 16:50:16,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:50:16,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:16,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:50:16,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:50:16,062 INFO L87 Difference]: Start difference. First operand 2858 states and 9947 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:17,022 INFO L93 Difference]: Finished difference Result 5875 states and 18762 transitions. [2021-06-05 16:50:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:50:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:17,031 INFO L225 Difference]: With dead ends: 5875 [2021-06-05 16:50:17,031 INFO L226 Difference]: Without dead ends: 5875 [2021-06-05 16:50:17,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 584.7ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:50:17,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2021-06-05 16:50:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 2870. [2021-06-05 16:50:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2869 states have (on average 3.480306727082607) internal successors, (9985), 2869 states have internal predecessors, (9985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 9985 transitions. [2021-06-05 16:50:17,085 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 9985 transitions. Word has length 28 [2021-06-05 16:50:17,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:17,085 INFO L482 AbstractCegarLoop]: Abstraction has 2870 states and 9985 transitions. [2021-06-05 16:50:17,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 9985 transitions. [2021-06-05 16:50:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:17,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:17,088 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:17,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3525,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:17,288 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:17,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1792117207, now seen corresponding path program 80 times [2021-06-05 16:50:17,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:17,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747522194] [2021-06-05 16:50:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:17,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:17,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747522194] [2021-06-05 16:50:17,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747522194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:17,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036996857] [2021-06-05 16:50:17,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:17,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:17,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:17,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:17,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:17,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036996857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:17,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:17,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:50:17,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660047923] [2021-06-05 16:50:17,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:17,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:17,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:17,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:17,461 INFO L87 Difference]: Start difference. First operand 2870 states and 9985 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:18,595 INFO L93 Difference]: Finished difference Result 6654 states and 20757 transitions. [2021-06-05 16:50:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:50:18,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:18,605 INFO L225 Difference]: With dead ends: 6654 [2021-06-05 16:50:18,605 INFO L226 Difference]: Without dead ends: 6654 [2021-06-05 16:50:18,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 699.9ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:50:18,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2021-06-05 16:50:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 2936. [2021-06-05 16:50:18,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 3.475979557069847) internal successors, (10202), 2935 states have internal predecessors, (10202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 10202 transitions. [2021-06-05 16:50:18,666 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 10202 transitions. Word has length 28 [2021-06-05 16:50:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:18,666 INFO L482 AbstractCegarLoop]: Abstraction has 2936 states and 10202 transitions. [2021-06-05 16:50:18,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 10202 transitions. [2021-06-05 16:50:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:18,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:18,670 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:18,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3526,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:18,870 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:18,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:18,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1447472695, now seen corresponding path program 81 times [2021-06-05 16:50:18,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:18,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861232713] [2021-06-05 16:50:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:18,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:18,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861232713] [2021-06-05 16:50:18,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861232713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:18,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004371392] [2021-06-05 16:50:18,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:18,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:50:18,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:18,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:18,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:19,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004371392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:19,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:19,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:50:19,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165138198] [2021-06-05 16:50:19,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:19,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:19,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:19,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:19,042 INFO L87 Difference]: Start difference. First operand 2936 states and 10202 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:20,116 INFO L93 Difference]: Finished difference Result 6217 states and 19611 transitions. [2021-06-05 16:50:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:50:20,117 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:20,126 INFO L225 Difference]: With dead ends: 6217 [2021-06-05 16:50:20,126 INFO L226 Difference]: Without dead ends: 6213 [2021-06-05 16:50:20,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 637.2ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:50:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2021-06-05 16:50:20,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 2862. [2021-06-05 16:50:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.471513456833275) internal successors, (9932), 2861 states have internal predecessors, (9932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 9932 transitions. [2021-06-05 16:50:20,213 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 9932 transitions. Word has length 28 [2021-06-05 16:50:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:20,213 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 9932 transitions. [2021-06-05 16:50:20,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 9932 transitions. [2021-06-05 16:50:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:20,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:20,216 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:20,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3527 [2021-06-05 16:50:20,417 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:20,417 INFO L82 PathProgramCache]: Analyzing trace with hash 193360559, now seen corresponding path program 68 times [2021-06-05 16:50:20,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:20,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133929488] [2021-06-05 16:50:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:20,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:20,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133929488] [2021-06-05 16:50:20,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133929488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:20,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502389528] [2021-06-05 16:50:20,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:20,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:20,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:20,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:20,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:20,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502389528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:20,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:20,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:50:20,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324215071] [2021-06-05 16:50:20,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:50:20,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:20,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:50:20,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:50:20,567 INFO L87 Difference]: Start difference. First operand 2862 states and 9932 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:21,142 INFO L93 Difference]: Finished difference Result 5353 states and 17165 transitions. [2021-06-05 16:50:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:50:21,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:21,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:21,150 INFO L225 Difference]: With dead ends: 5353 [2021-06-05 16:50:21,150 INFO L226 Difference]: Without dead ends: 5353 [2021-06-05 16:50:21,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:50:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-06-05 16:50:21,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 2862. [2021-06-05 16:50:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.473610625655365) internal successors, (9938), 2861 states have internal predecessors, (9938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 9938 transitions. [2021-06-05 16:50:21,197 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 9938 transitions. Word has length 28 [2021-06-05 16:50:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:21,197 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 9938 transitions. [2021-06-05 16:50:21,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 9938 transitions. [2021-06-05 16:50:21,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:21,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:21,200 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:21,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3528 [2021-06-05 16:50:21,401 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:21,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:21,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1418439203, now seen corresponding path program 69 times [2021-06-05 16:50:21,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:21,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955525294] [2021-06-05 16:50:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:21,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:21,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955525294] [2021-06-05 16:50:21,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955525294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:21,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028681449] [2021-06-05 16:50:21,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:21,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:50:21,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:21,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:21,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:21,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028681449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:21,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:21,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:50:21,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388537416] [2021-06-05 16:50:21,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:50:21,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:21,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:50:21,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:50:21,547 INFO L87 Difference]: Start difference. First operand 2862 states and 9938 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:22,324 INFO L93 Difference]: Finished difference Result 5672 states and 18078 transitions. [2021-06-05 16:50:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:50:22,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:22,332 INFO L225 Difference]: With dead ends: 5672 [2021-06-05 16:50:22,332 INFO L226 Difference]: Without dead ends: 5672 [2021-06-05 16:50:22,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:50:22,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5672 states. [2021-06-05 16:50:22,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5672 to 2853. [2021-06-05 16:50:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 3.473702664796634) internal successors, (9907), 2852 states have internal predecessors, (9907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:22,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 9907 transitions. [2021-06-05 16:50:22,401 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 9907 transitions. Word has length 28 [2021-06-05 16:50:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:22,401 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 9907 transitions. [2021-06-05 16:50:22,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 9907 transitions. [2021-06-05 16:50:22,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:22,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:22,405 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:22,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3529 [2021-06-05 16:50:22,605 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:22,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:22,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1649978851, now seen corresponding path program 70 times [2021-06-05 16:50:22,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:22,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092632140] [2021-06-05 16:50:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:22,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:22,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092632140] [2021-06-05 16:50:22,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092632140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:22,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496889617] [2021-06-05 16:50:22,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:22,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:22,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:22,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:22,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496889617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:22,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:22,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:50:22,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040407545] [2021-06-05 16:50:22,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:50:22,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:22,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:50:22,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:50:22,748 INFO L87 Difference]: Start difference. First operand 2853 states and 9907 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:23,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:23,611 INFO L93 Difference]: Finished difference Result 6160 states and 19384 transitions. [2021-06-05 16:50:23,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:50:23,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:23,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:23,620 INFO L225 Difference]: With dead ends: 6160 [2021-06-05 16:50:23,621 INFO L226 Difference]: Without dead ends: 6160 [2021-06-05 16:50:23,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 514.0ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:50:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-06-05 16:50:23,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 2913. [2021-06-05 16:50:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.4701236263736264) internal successors, (10105), 2912 states have internal predecessors, (10105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10105 transitions. [2021-06-05 16:50:23,686 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10105 transitions. Word has length 28 [2021-06-05 16:50:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:23,686 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10105 transitions. [2021-06-05 16:50:23,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10105 transitions. [2021-06-05 16:50:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:23,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:23,690 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:23,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3530,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:23,890 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:23,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:23,891 INFO L82 PathProgramCache]: Analyzing trace with hash 707808605, now seen corresponding path program 71 times [2021-06-05 16:50:23,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:23,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553400726] [2021-06-05 16:50:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:23,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:23,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553400726] [2021-06-05 16:50:23,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553400726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:23,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820677677] [2021-06-05 16:50:23,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:23,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:50:23,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:23,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:23,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:24,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820677677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:24,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:24,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:50:24,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956363965] [2021-06-05 16:50:24,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:24,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:24,056 INFO L87 Difference]: Start difference. First operand 2913 states and 10105 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:24,619 INFO L93 Difference]: Finished difference Result 6832 states and 22884 transitions. [2021-06-05 16:50:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:50:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:24,631 INFO L225 Difference]: With dead ends: 6832 [2021-06-05 16:50:24,631 INFO L226 Difference]: Without dead ends: 6832 [2021-06-05 16:50:24,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:50:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2021-06-05 16:50:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 4173. [2021-06-05 16:50:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 3.5884467881112174) internal successors, (14971), 4172 states have internal predecessors, (14971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 14971 transitions. [2021-06-05 16:50:24,712 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 14971 transitions. Word has length 28 [2021-06-05 16:50:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:24,712 INFO L482 AbstractCegarLoop]: Abstraction has 4173 states and 14971 transitions. [2021-06-05 16:50:24,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:24,712 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 14971 transitions. [2021-06-05 16:50:24,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:24,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:24,717 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:24,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:24,918 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:24,918 INFO L82 PathProgramCache]: Analyzing trace with hash -703859107, now seen corresponding path program 72 times [2021-06-05 16:50:24,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:24,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995574595] [2021-06-05 16:50:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:24,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:24,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995574595] [2021-06-05 16:50:24,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995574595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:24,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176282609] [2021-06-05 16:50:24,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:24,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:50:24,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:24,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:24,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:25,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176282609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:25,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:25,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:50:25,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009458730] [2021-06-05 16:50:25,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:50:25,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:25,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:50:25,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:50:25,058 INFO L87 Difference]: Start difference. First operand 4173 states and 14971 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:25,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:25,904 INFO L93 Difference]: Finished difference Result 7512 states and 25338 transitions. [2021-06-05 16:50:25,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:50:25,904 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:25,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:25,916 INFO L225 Difference]: With dead ends: 7512 [2021-06-05 16:50:25,916 INFO L226 Difference]: Without dead ends: 7508 [2021-06-05 16:50:25,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 465.1ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:50:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-06-05 16:50:25,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 4065. [2021-06-05 16:50:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 3.597194881889764) internal successors, (14619), 4064 states have internal predecessors, (14619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 14619 transitions. [2021-06-05 16:50:25,993 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 14619 transitions. Word has length 28 [2021-06-05 16:50:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:25,993 INFO L482 AbstractCegarLoop]: Abstraction has 4065 states and 14619 transitions. [2021-06-05 16:50:25,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 14619 transitions. [2021-06-05 16:50:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:25,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:25,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:26,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3532,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:26,199 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:26,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:26,199 INFO L82 PathProgramCache]: Analyzing trace with hash 325457475, now seen corresponding path program 82 times [2021-06-05 16:50:26,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:26,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285254709] [2021-06-05 16:50:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:26,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:26,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285254709] [2021-06-05 16:50:26,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285254709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:26,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642974990] [2021-06-05 16:50:26,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:26,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:26,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:26,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:50:26,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:26,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642974990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:26,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:26,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:50:26,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562457396] [2021-06-05 16:50:26,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:50:26,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:26,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:50:26,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:50:26,370 INFO L87 Difference]: Start difference. First operand 4065 states and 14619 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:27,242 INFO L93 Difference]: Finished difference Result 8298 states and 27746 transitions. [2021-06-05 16:50:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:50:27,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:27,253 INFO L225 Difference]: With dead ends: 8298 [2021-06-05 16:50:27,254 INFO L226 Difference]: Without dead ends: 8289 [2021-06-05 16:50:27,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 516.6ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:50:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-06-05 16:50:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 4502. [2021-06-05 16:50:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 3.688735836480782) internal successors, (16603), 4501 states have internal predecessors, (16603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:27,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 16603 transitions. [2021-06-05 16:50:27,337 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 16603 transitions. Word has length 28 [2021-06-05 16:50:27,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:27,337 INFO L482 AbstractCegarLoop]: Abstraction has 4502 states and 16603 transitions. [2021-06-05 16:50:27,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:27,337 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 16603 transitions. [2021-06-05 16:50:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:27,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:27,342 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:27,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3533,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:27,543 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:27,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:27,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1928168421, now seen corresponding path program 83 times [2021-06-05 16:50:27,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:27,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164341969] [2021-06-05 16:50:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:27,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:27,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164341969] [2021-06-05 16:50:27,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164341969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:27,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665427424] [2021-06-05 16:50:27,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:27,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:50:27,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:27,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:50:27,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:27,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665427424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:27,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:27,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:50:27,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520748570] [2021-06-05 16:50:27,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:50:27,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:27,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:50:27,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:50:27,698 INFO L87 Difference]: Start difference. First operand 4502 states and 16603 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:28,565 INFO L93 Difference]: Finished difference Result 8567 states and 28576 transitions. [2021-06-05 16:50:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:50:28,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:28,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:28,579 INFO L225 Difference]: With dead ends: 8567 [2021-06-05 16:50:28,579 INFO L226 Difference]: Without dead ends: 8567 [2021-06-05 16:50:28,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:50:28,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2021-06-05 16:50:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 4520. [2021-06-05 16:50:28,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 3.677362248285019) internal successors, (16618), 4519 states have internal predecessors, (16618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 16618 transitions. [2021-06-05 16:50:28,676 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 16618 transitions. Word has length 28 [2021-06-05 16:50:28,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:28,676 INFO L482 AbstractCegarLoop]: Abstraction has 4520 states and 16618 transitions. [2021-06-05 16:50:28,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:28,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 16618 transitions. [2021-06-05 16:50:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:28,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:28,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:28,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3534,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:28,884 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1163392585, now seen corresponding path program 84 times [2021-06-05 16:50:28,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:28,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028129428] [2021-06-05 16:50:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:28,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:28,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028129428] [2021-06-05 16:50:28,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028129428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:28,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554305453] [2021-06-05 16:50:28,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:28,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:50:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:28,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:50:28,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:29,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554305453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:29,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:29,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:50:29,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543346558] [2021-06-05 16:50:29,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:50:29,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:29,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:50:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:50:29,006 INFO L87 Difference]: Start difference. First operand 4520 states and 16618 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:29,439 INFO L93 Difference]: Finished difference Result 8001 states and 28114 transitions. [2021-06-05 16:50:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:50:29,439 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:29,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:29,452 INFO L225 Difference]: With dead ends: 8001 [2021-06-05 16:50:29,452 INFO L226 Difference]: Without dead ends: 7918 [2021-06-05 16:50:29,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 237.5ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:50:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7918 states. [2021-06-05 16:50:29,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7918 to 5964. [2021-06-05 16:50:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5964 states, 5963 states have (on average 3.7450947509642796) internal successors, (22332), 5963 states have internal predecessors, (22332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:29,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 22332 transitions. [2021-06-05 16:50:29,555 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 22332 transitions. Word has length 28 [2021-06-05 16:50:29,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:29,555 INFO L482 AbstractCegarLoop]: Abstraction has 5964 states and 22332 transitions. [2021-06-05 16:50:29,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 22332 transitions. [2021-06-05 16:50:29,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:29,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:29,563 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:29,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3535,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:29,764 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1923559731, now seen corresponding path program 85 times [2021-06-05 16:50:29,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:29,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907549478] [2021-06-05 16:50:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:29,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:29,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907549478] [2021-06-05 16:50:29,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907549478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:29,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829293395] [2021-06-05 16:50:29,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:29,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:50:29,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:29,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829293395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:29,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:29,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:50:29,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587563505] [2021-06-05 16:50:29,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:50:29,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:29,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:50:29,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:50:29,871 INFO L87 Difference]: Start difference. First operand 5964 states and 22332 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:30,075 INFO L93 Difference]: Finished difference Result 8265 states and 28982 transitions. [2021-06-05 16:50:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:50:30,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:30,088 INFO L225 Difference]: With dead ends: 8265 [2021-06-05 16:50:30,088 INFO L226 Difference]: Without dead ends: 8265 [2021-06-05 16:50:30,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:50:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2021-06-05 16:50:30,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 6071. [2021-06-05 16:50:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6071 states, 6070 states have (on average 3.7255354200988466) internal successors, (22614), 6070 states have internal predecessors, (22614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6071 states to 6071 states and 22614 transitions. [2021-06-05 16:50:30,190 INFO L78 Accepts]: Start accepts. Automaton has 6071 states and 22614 transitions. Word has length 28 [2021-06-05 16:50:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:30,190 INFO L482 AbstractCegarLoop]: Abstraction has 6071 states and 22614 transitions. [2021-06-05 16:50:30,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 6071 states and 22614 transitions. [2021-06-05 16:50:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:30,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:30,198 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:30,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3536,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:30,399 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:30,399 INFO L82 PathProgramCache]: Analyzing trace with hash -993359987, now seen corresponding path program 86 times [2021-06-05 16:50:30,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:30,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614744054] [2021-06-05 16:50:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:30,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:30,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614744054] [2021-06-05 16:50:30,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614744054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:30,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938593021] [2021-06-05 16:50:30,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:30,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:30,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:30,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:30,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:30,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938593021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:30,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:30,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:50:30,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988665029] [2021-06-05 16:50:30,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:50:30,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:30,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:50:30,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:50:30,533 INFO L87 Difference]: Start difference. First operand 6071 states and 22614 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:31,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:31,258 INFO L93 Difference]: Finished difference Result 12605 states and 43798 transitions. [2021-06-05 16:50:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:50:31,259 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:31,282 INFO L225 Difference]: With dead ends: 12605 [2021-06-05 16:50:31,282 INFO L226 Difference]: Without dead ends: 12605 [2021-06-05 16:50:31,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 434.0ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:50:31,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12605 states. [2021-06-05 16:50:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12605 to 6726. [2021-06-05 16:50:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6726 states, 6725 states have (on average 3.7414126394052043) internal successors, (25161), 6725 states have internal predecessors, (25161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:31,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6726 states to 6726 states and 25161 transitions. [2021-06-05 16:50:31,486 INFO L78 Accepts]: Start accepts. Automaton has 6726 states and 25161 transitions. Word has length 28 [2021-06-05 16:50:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:31,486 INFO L482 AbstractCegarLoop]: Abstraction has 6726 states and 25161 transitions. [2021-06-05 16:50:31,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 6726 states and 25161 transitions. [2021-06-05 16:50:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:31,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:31,495 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:31,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3537 [2021-06-05 16:50:31,696 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:31,696 INFO L82 PathProgramCache]: Analyzing trace with hash 909319465, now seen corresponding path program 87 times [2021-06-05 16:50:31,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:31,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090918887] [2021-06-05 16:50:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:31,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:31,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090918887] [2021-06-05 16:50:31,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090918887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:31,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908164] [2021-06-05 16:50:31,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:31,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:50:31,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:31,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:31,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:31,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:31,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:31,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 16:50:31,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619926228] [2021-06-05 16:50:31,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:50:31,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:31,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:50:31,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:50:31,837 INFO L87 Difference]: Start difference. First operand 6726 states and 25161 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:32,555 INFO L93 Difference]: Finished difference Result 12718 states and 44233 transitions. [2021-06-05 16:50:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:50:32,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:32,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:32,577 INFO L225 Difference]: With dead ends: 12718 [2021-06-05 16:50:32,577 INFO L226 Difference]: Without dead ends: 12718 [2021-06-05 16:50:32,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 413.0ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:50:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2021-06-05 16:50:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 6962. [2021-06-05 16:50:32,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6961 states have (on average 3.7214480678063495) internal successors, (25905), 6961 states have internal predecessors, (25905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 25905 transitions. [2021-06-05 16:50:32,728 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 25905 transitions. Word has length 28 [2021-06-05 16:50:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:32,728 INFO L482 AbstractCegarLoop]: Abstraction has 6962 states and 25905 transitions. [2021-06-05 16:50:32,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 25905 transitions. [2021-06-05 16:50:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:32,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:32,738 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:32,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3538,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:32,939 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash -173703191, now seen corresponding path program 88 times [2021-06-05 16:50:32,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:32,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064004859] [2021-06-05 16:50:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:32,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:32,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064004859] [2021-06-05 16:50:32,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064004859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:32,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411519878] [2021-06-05 16:50:32,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:32,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:32,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:32,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:50:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:33,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411519878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:33,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:33,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:50:33,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24944449] [2021-06-05 16:50:33,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:50:33,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:33,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:50:33,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:50:33,056 INFO L87 Difference]: Start difference. First operand 6962 states and 25905 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:33,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:33,412 INFO L93 Difference]: Finished difference Result 9470 states and 33921 transitions. [2021-06-05 16:50:33,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:50:33,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:33,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:33,431 INFO L225 Difference]: With dead ends: 9470 [2021-06-05 16:50:33,431 INFO L226 Difference]: Without dead ends: 9440 [2021-06-05 16:50:33,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:50:33,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9440 states. [2021-06-05 16:50:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9440 to 7814. [2021-06-05 16:50:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7814 states, 7813 states have (on average 3.749904006143607) internal successors, (29298), 7813 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:33,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 29298 transitions. [2021-06-05 16:50:33,604 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 29298 transitions. Word has length 28 [2021-06-05 16:50:33,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:33,604 INFO L482 AbstractCegarLoop]: Abstraction has 7814 states and 29298 transitions. [2021-06-05 16:50:33,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:33,604 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 29298 transitions. [2021-06-05 16:50:33,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:33,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:33,615 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:33,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3539 [2021-06-05 16:50:33,815 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:33,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1297374927, now seen corresponding path program 89 times [2021-06-05 16:50:33,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:33,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937777134] [2021-06-05 16:50:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:33,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:33,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937777134] [2021-06-05 16:50:33,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937777134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:33,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595006863] [2021-06-05 16:50:33,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:33,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:50:33,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:33,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:50:33,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:33,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595006863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:33,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:33,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:50:33,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283399883] [2021-06-05 16:50:33,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:50:33,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:33,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:50:33,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:50:33,936 INFO L87 Difference]: Start difference. First operand 7814 states and 29298 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:34,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:34,290 INFO L93 Difference]: Finished difference Result 10065 states and 35894 transitions. [2021-06-05 16:50:34,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:50:34,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:34,308 INFO L225 Difference]: With dead ends: 10065 [2021-06-05 16:50:34,309 INFO L226 Difference]: Without dead ends: 10065 [2021-06-05 16:50:34,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:50:34,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10065 states. [2021-06-05 16:50:34,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10065 to 7854. [2021-06-05 16:50:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7854 states, 7853 states have (on average 3.7459569591239017) internal successors, (29417), 7853 states have internal predecessors, (29417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 29417 transitions. [2021-06-05 16:50:34,458 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 29417 transitions. Word has length 28 [2021-06-05 16:50:34,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:34,458 INFO L482 AbstractCegarLoop]: Abstraction has 7854 states and 29417 transitions. [2021-06-05 16:50:34,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 29417 transitions. [2021-06-05 16:50:34,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:34,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:34,470 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:34,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3540 [2021-06-05 16:50:34,670 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1855439209, now seen corresponding path program 90 times [2021-06-05 16:50:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:34,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472970924] [2021-06-05 16:50:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:34,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472970924] [2021-06-05 16:50:34,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472970924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956067685] [2021-06-05 16:50:34,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:34,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:50:34,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:34,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:34,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956067685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:34,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:34,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 16:50:34,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173742635] [2021-06-05 16:50:34,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:50:34,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:34,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:50:34,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:50:34,793 INFO L87 Difference]: Start difference. First operand 7854 states and 29417 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:35,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:35,460 INFO L93 Difference]: Finished difference Result 13425 states and 47598 transitions. [2021-06-05 16:50:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:50:35,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:35,486 INFO L225 Difference]: With dead ends: 13425 [2021-06-05 16:50:35,486 INFO L226 Difference]: Without dead ends: 13421 [2021-06-05 16:50:35,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:50:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2021-06-05 16:50:35,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 7752. [2021-06-05 16:50:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7752 states, 7751 states have (on average 3.7497097148755) internal successors, (29064), 7751 states have internal predecessors, (29064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7752 states to 7752 states and 29064 transitions. [2021-06-05 16:50:35,665 INFO L78 Accepts]: Start accepts. Automaton has 7752 states and 29064 transitions. Word has length 28 [2021-06-05 16:50:35,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:35,665 INFO L482 AbstractCegarLoop]: Abstraction has 7752 states and 29064 transitions. [2021-06-05 16:50:35,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 7752 states and 29064 transitions. [2021-06-05 16:50:35,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:35,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:35,677 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:35,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3541,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:35,877 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:35,877 INFO L82 PathProgramCache]: Analyzing trace with hash 812772317, now seen corresponding path program 91 times [2021-06-05 16:50:35,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:35,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903466256] [2021-06-05 16:50:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:35,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:35,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903466256] [2021-06-05 16:50:35,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903466256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:35,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624899512] [2021-06-05 16:50:35,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:35,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:50:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:36,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624899512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:36,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:36,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:50:36,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407345775] [2021-06-05 16:50:36,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:50:36,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:36,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:50:36,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:50:36,000 INFO L87 Difference]: Start difference. First operand 7752 states and 29064 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:36,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:36,452 INFO L93 Difference]: Finished difference Result 10276 states and 36673 transitions. [2021-06-05 16:50:36,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:50:36,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:36,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:36,470 INFO L225 Difference]: With dead ends: 10276 [2021-06-05 16:50:36,470 INFO L226 Difference]: Without dead ends: 10276 [2021-06-05 16:50:36,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 241.4ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:50:36,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10276 states. [2021-06-05 16:50:36,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10276 to 7683. [2021-06-05 16:50:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.743686539963551) internal successors, (28759), 7682 states have internal predecessors, (28759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28759 transitions. [2021-06-05 16:50:36,616 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28759 transitions. Word has length 28 [2021-06-05 16:50:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:36,616 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 28759 transitions. [2021-06-05 16:50:36,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28759 transitions. [2021-06-05 16:50:36,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:36,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:36,628 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:36,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3542 [2021-06-05 16:50:36,828 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:36,828 INFO L82 PathProgramCache]: Analyzing trace with hash 933737069, now seen corresponding path program 92 times [2021-06-05 16:50:36,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:36,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941752058] [2021-06-05 16:50:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:36,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:36,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941752058] [2021-06-05 16:50:36,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941752058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:36,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914721523] [2021-06-05 16:50:36,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:36,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:36,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:36,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:36,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:36,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914721523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:36,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:36,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:50:36,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912344206] [2021-06-05 16:50:36,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:50:36,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:36,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:50:36,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:50:36,956 INFO L87 Difference]: Start difference. First operand 7683 states and 28759 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:37,667 INFO L93 Difference]: Finished difference Result 13291 states and 47039 transitions. [2021-06-05 16:50:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:50:37,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:37,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:37,690 INFO L225 Difference]: With dead ends: 13291 [2021-06-05 16:50:37,691 INFO L226 Difference]: Without dead ends: 13279 [2021-06-05 16:50:37,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:50:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13279 states. [2021-06-05 16:50:37,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13279 to 7683. [2021-06-05 16:50:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.7431658422285863) internal successors, (28755), 7682 states have internal predecessors, (28755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28755 transitions. [2021-06-05 16:50:37,852 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28755 transitions. Word has length 28 [2021-06-05 16:50:37,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:37,852 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 28755 transitions. [2021-06-05 16:50:37,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28755 transitions. [2021-06-05 16:50:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:37,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:37,863 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:38,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:38,064 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:38,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:38,064 INFO L82 PathProgramCache]: Analyzing trace with hash -306445935, now seen corresponding path program 93 times [2021-06-05 16:50:38,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:38,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477890058] [2021-06-05 16:50:38,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:38,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:38,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:38,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477890058] [2021-06-05 16:50:38,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477890058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:38,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241982261] [2021-06-05 16:50:38,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:38,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:50:38,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:38,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:38,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:38,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241982261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:38,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:38,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:50:38,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968545968] [2021-06-05 16:50:38,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:50:38,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:38,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:50:38,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:50:38,207 INFO L87 Difference]: Start difference. First operand 7683 states and 28755 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:39,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:39,442 INFO L93 Difference]: Finished difference Result 20069 states and 69965 transitions. [2021-06-05 16:50:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 16:50:39,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:39,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:39,488 INFO L225 Difference]: With dead ends: 20069 [2021-06-05 16:50:39,488 INFO L226 Difference]: Without dead ends: 20069 [2021-06-05 16:50:39,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 732.0ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:50:39,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20069 states. [2021-06-05 16:50:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20069 to 10444. [2021-06-05 16:50:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10444 states, 10443 states have (on average 3.790577420281528) internal successors, (39585), 10443 states have internal predecessors, (39585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10444 states to 10444 states and 39585 transitions. [2021-06-05 16:50:39,843 INFO L78 Accepts]: Start accepts. Automaton has 10444 states and 39585 transitions. Word has length 28 [2021-06-05 16:50:39,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:39,843 INFO L482 AbstractCegarLoop]: Abstraction has 10444 states and 39585 transitions. [2021-06-05 16:50:39,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:39,843 INFO L276 IsEmpty]: Start isEmpty. Operand 10444 states and 39585 transitions. [2021-06-05 16:50:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:39,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:39,858 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:40,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3544,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:40,059 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash 765871039, now seen corresponding path program 94 times [2021-06-05 16:50:40,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:40,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908479026] [2021-06-05 16:50:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:40,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:40,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908479026] [2021-06-05 16:50:40,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908479026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:40,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554198236] [2021-06-05 16:50:40,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:40,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:40,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:40,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:40,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554198236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:40,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:40,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:50:40,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171320092] [2021-06-05 16:50:40,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:50:40,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:40,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:50:40,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:50:40,193 INFO L87 Difference]: Start difference. First operand 10444 states and 39585 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:41,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:41,273 INFO L93 Difference]: Finished difference Result 19312 states and 67991 transitions. [2021-06-05 16:50:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:50:41,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:41,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:41,313 INFO L225 Difference]: With dead ends: 19312 [2021-06-05 16:50:41,313 INFO L226 Difference]: Without dead ends: 19300 [2021-06-05 16:50:41,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:50:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19300 states. [2021-06-05 16:50:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19300 to 10242. [2021-06-05 16:50:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10242 states, 10241 states have (on average 3.799043062200957) internal successors, (38906), 10241 states have internal predecessors, (38906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10242 states to 10242 states and 38906 transitions. [2021-06-05 16:50:41,639 INFO L78 Accepts]: Start accepts. Automaton has 10242 states and 38906 transitions. Word has length 28 [2021-06-05 16:50:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:41,639 INFO L482 AbstractCegarLoop]: Abstraction has 10242 states and 38906 transitions. [2021-06-05 16:50:41,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 10242 states and 38906 transitions. [2021-06-05 16:50:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:41,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:41,654 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:41,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3545,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:41,855 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:41,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2026707565, now seen corresponding path program 95 times [2021-06-05 16:50:41,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:41,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218075571] [2021-06-05 16:50:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:41,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:41,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218075571] [2021-06-05 16:50:41,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218075571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:41,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362000911] [2021-06-05 16:50:41,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:41,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:50:41,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:41,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:41,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362000911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:41,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:41,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:50:41,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917374767] [2021-06-05 16:50:41,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:50:41,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:41,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:50:41,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:50:41,995 INFO L87 Difference]: Start difference. First operand 10242 states and 38906 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:43,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:43,022 INFO L93 Difference]: Finished difference Result 19128 states and 67337 transitions. [2021-06-05 16:50:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:50:43,022 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:43,057 INFO L225 Difference]: With dead ends: 19128 [2021-06-05 16:50:43,057 INFO L226 Difference]: Without dead ends: 19092 [2021-06-05 16:50:43,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 580.2ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:50:43,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19092 states. [2021-06-05 16:50:43,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19092 to 10290. [2021-06-05 16:50:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10290 states, 10289 states have (on average 3.7970648265137528) internal successors, (39068), 10289 states have internal predecessors, (39068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:43,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10290 states to 10290 states and 39068 transitions. [2021-06-05 16:50:43,399 INFO L78 Accepts]: Start accepts. Automaton has 10290 states and 39068 transitions. Word has length 28 [2021-06-05 16:50:43,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:43,399 INFO L482 AbstractCegarLoop]: Abstraction has 10290 states and 39068 transitions. [2021-06-05 16:50:43,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 10290 states and 39068 transitions. [2021-06-05 16:50:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:43,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:43,416 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:43,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3546,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:43,616 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1595973395, now seen corresponding path program 96 times [2021-06-05 16:50:43,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:43,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417465584] [2021-06-05 16:50:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:43,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:43,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417465584] [2021-06-05 16:50:43,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417465584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:43,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367893961] [2021-06-05 16:50:43,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:43,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:50:43,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:43,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:43,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:43,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367893961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:43,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:43,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:50:43,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838558025] [2021-06-05 16:50:43,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:43,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:43,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:43,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:43,810 INFO L87 Difference]: Start difference. First operand 10290 states and 39068 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:45,286 INFO L93 Difference]: Finished difference Result 19050 states and 67176 transitions. [2021-06-05 16:50:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 16:50:45,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:45,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:45,324 INFO L225 Difference]: With dead ends: 19050 [2021-06-05 16:50:45,325 INFO L226 Difference]: Without dead ends: 19050 [2021-06-05 16:50:45,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 929.0ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:50:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19050 states. [2021-06-05 16:50:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19050 to 10488. [2021-06-05 16:50:45,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10488 states, 10487 states have (on average 3.787832554591399) internal successors, (39723), 10487 states have internal predecessors, (39723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10488 states to 10488 states and 39723 transitions. [2021-06-05 16:50:45,683 INFO L78 Accepts]: Start accepts. Automaton has 10488 states and 39723 transitions. Word has length 28 [2021-06-05 16:50:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:45,683 INFO L482 AbstractCegarLoop]: Abstraction has 10488 states and 39723 transitions. [2021-06-05 16:50:45,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 10488 states and 39723 transitions. [2021-06-05 16:50:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:45,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:45,701 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:45,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3547 [2021-06-05 16:50:45,901 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:45,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1643616507, now seen corresponding path program 97 times [2021-06-05 16:50:45,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:45,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66677947] [2021-06-05 16:50:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:45,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:45,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66677947] [2021-06-05 16:50:45,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66677947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:45,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460400645] [2021-06-05 16:50:45,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:45,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:45,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:46,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460400645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:46,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:46,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:50:46,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521120830] [2021-06-05 16:50:46,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:46,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:46,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:46,067 INFO L87 Difference]: Start difference. First operand 10488 states and 39723 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:47,340 INFO L93 Difference]: Finished difference Result 18660 states and 66098 transitions. [2021-06-05 16:50:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:50:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:47,382 INFO L225 Difference]: With dead ends: 18660 [2021-06-05 16:50:47,382 INFO L226 Difference]: Without dead ends: 18648 [2021-06-05 16:50:47,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 784.7ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:50:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2021-06-05 16:50:47,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 10366. [2021-06-05 16:50:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 3.7916063675832126) internal successors, (39300), 10365 states have internal predecessors, (39300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 39300 transitions. [2021-06-05 16:50:47,760 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 39300 transitions. Word has length 28 [2021-06-05 16:50:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:47,760 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 39300 transitions. [2021-06-05 16:50:47,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 39300 transitions. [2021-06-05 16:50:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:47,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:47,781 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:47,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3548,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:47,985 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:47,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1168215851, now seen corresponding path program 98 times [2021-06-05 16:50:47,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:47,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352067656] [2021-06-05 16:50:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:48,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:48,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352067656] [2021-06-05 16:50:48,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352067656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:48,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97051721] [2021-06-05 16:50:48,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:48,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:48,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:48,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:48,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:48,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97051721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:48,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:48,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:50:48,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34831291] [2021-06-05 16:50:48,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:50:48,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:48,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:50:48,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:50:48,152 INFO L87 Difference]: Start difference. First operand 10366 states and 39300 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:49,416 INFO L93 Difference]: Finished difference Result 17898 states and 64003 transitions. [2021-06-05 16:50:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:50:49,416 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:49,452 INFO L225 Difference]: With dead ends: 17898 [2021-06-05 16:50:49,452 INFO L226 Difference]: Without dead ends: 17862 [2021-06-05 16:50:49,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 676.3ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:50:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17862 states. [2021-06-05 16:50:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17862 to 10386. [2021-06-05 16:50:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10386 states, 10385 states have (on average 3.7906596051998074) internal successors, (39366), 10385 states have internal predecessors, (39366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10386 states to 10386 states and 39366 transitions. [2021-06-05 16:50:49,705 INFO L78 Accepts]: Start accepts. Automaton has 10386 states and 39366 transitions. Word has length 28 [2021-06-05 16:50:49,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:49,706 INFO L482 AbstractCegarLoop]: Abstraction has 10386 states and 39366 transitions. [2021-06-05 16:50:49,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:49,706 INFO L276 IsEmpty]: Start isEmpty. Operand 10386 states and 39366 transitions. [2021-06-05 16:50:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:49,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:49,720 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:49,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3549 [2021-06-05 16:50:49,921 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:49,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1708660749, now seen corresponding path program 99 times [2021-06-05 16:50:49,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:49,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896747979] [2021-06-05 16:50:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:49,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:49,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896747979] [2021-06-05 16:50:49,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896747979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:49,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559917346] [2021-06-05 16:50:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:49,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:50:49,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:49,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:49,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:50,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559917346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:50,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:50,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:50:50,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57676441] [2021-06-05 16:50:50,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:50,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:50,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:50,093 INFO L87 Difference]: Start difference. First operand 10386 states and 39366 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:51,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:51,443 INFO L93 Difference]: Finished difference Result 26075 states and 92737 transitions. [2021-06-05 16:50:51,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 16:50:51,443 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:51,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:51,497 INFO L225 Difference]: With dead ends: 26075 [2021-06-05 16:50:51,497 INFO L226 Difference]: Without dead ends: 26075 [2021-06-05 16:50:51,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 812.0ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 16:50:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26075 states. [2021-06-05 16:50:51,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26075 to 10692. [2021-06-05 16:50:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10692 states, 10691 states have (on average 3.8184454213824712) internal successors, (40823), 10691 states have internal predecessors, (40823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10692 states to 10692 states and 40823 transitions. [2021-06-05 16:50:51,831 INFO L78 Accepts]: Start accepts. Automaton has 10692 states and 40823 transitions. Word has length 28 [2021-06-05 16:50:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:51,832 INFO L482 AbstractCegarLoop]: Abstraction has 10692 states and 40823 transitions. [2021-06-05 16:50:51,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 10692 states and 40823 transitions. [2021-06-05 16:50:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:51,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:51,847 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:52,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3550,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:52,048 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:52,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:52,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1057401903, now seen corresponding path program 100 times [2021-06-05 16:50:52,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:52,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191064800] [2021-06-05 16:50:52,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:52,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:52,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191064800] [2021-06-05 16:50:52,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191064800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:52,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193337888] [2021-06-05 16:50:52,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:52,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:50:52,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:52,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:52,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:52,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193337888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:52,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:52,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:50:52,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260511814] [2021-06-05 16:50:52,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:52,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:52,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:52,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:52,300 INFO L87 Difference]: Start difference. First operand 10692 states and 40823 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:53,592 INFO L93 Difference]: Finished difference Result 25519 states and 91410 transitions. [2021-06-05 16:50:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 16:50:53,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:53,651 INFO L225 Difference]: With dead ends: 25519 [2021-06-05 16:50:53,651 INFO L226 Difference]: Without dead ends: 25519 [2021-06-05 16:50:53,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 783.1ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:50:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25519 states. [2021-06-05 16:50:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25519 to 10592. [2021-06-05 16:50:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.8053063922198094) internal successors, (40302), 10591 states have internal predecessors, (40302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40302 transitions. [2021-06-05 16:50:53,994 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40302 transitions. Word has length 28 [2021-06-05 16:50:53,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:53,994 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40302 transitions. [2021-06-05 16:50:53,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40302 transitions. [2021-06-05 16:50:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:54,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:54,009 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:54,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-06-05 16:50:54,210 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:54,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:54,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1158271565, now seen corresponding path program 101 times [2021-06-05 16:50:54,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:54,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593636988] [2021-06-05 16:50:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:54,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:54,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593636988] [2021-06-05 16:50:54,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593636988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:54,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686881497] [2021-06-05 16:50:54,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:54,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:50:54,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:54,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:54,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:54,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686881497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:54,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:54,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:50:54,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352671792] [2021-06-05 16:50:54,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:50:54,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:54,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:50:54,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:50:54,369 INFO L87 Difference]: Start difference. First operand 10592 states and 40302 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:55,294 INFO L93 Difference]: Finished difference Result 20262 states and 72808 transitions. [2021-06-05 16:50:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:50:55,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:55,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:55,333 INFO L225 Difference]: With dead ends: 20262 [2021-06-05 16:50:55,333 INFO L226 Difference]: Without dead ends: 20262 [2021-06-05 16:50:55,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 522.2ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:50:55,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20262 states. [2021-06-05 16:50:55,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20262 to 10601. [2021-06-05 16:50:55,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10601 states, 10600 states have (on average 3.8042452830188678) internal successors, (40325), 10600 states have internal predecessors, (40325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10601 states to 10601 states and 40325 transitions. [2021-06-05 16:50:55,610 INFO L78 Accepts]: Start accepts. Automaton has 10601 states and 40325 transitions. Word has length 28 [2021-06-05 16:50:55,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:55,610 INFO L482 AbstractCegarLoop]: Abstraction has 10601 states and 40325 transitions. [2021-06-05 16:50:55,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 10601 states and 40325 transitions. [2021-06-05 16:50:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:55,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:55,627 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:55,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:55,827 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:55,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:55,828 INFO L82 PathProgramCache]: Analyzing trace with hash 545777745, now seen corresponding path program 102 times [2021-06-05 16:50:55,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:55,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607519914] [2021-06-05 16:50:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:55,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:55,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607519914] [2021-06-05 16:50:55,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607519914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:55,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747428099] [2021-06-05 16:50:55,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:55,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:50:55,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:55,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:55,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:55,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747428099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:55,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:55,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:50:55,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410591642] [2021-06-05 16:50:55,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:50:55,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:55,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:50:55,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:50:55,992 INFO L87 Difference]: Start difference. First operand 10601 states and 40325 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:56,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:56,804 INFO L93 Difference]: Finished difference Result 18811 states and 68168 transitions. [2021-06-05 16:50:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:50:56,805 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:56,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:56,841 INFO L225 Difference]: With dead ends: 18811 [2021-06-05 16:50:56,841 INFO L226 Difference]: Without dead ends: 18811 [2021-06-05 16:50:56,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:50:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18811 states. [2021-06-05 16:50:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18811 to 10613. [2021-06-05 16:50:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 3.80352431209951) internal successors, (40363), 10612 states have internal predecessors, (40363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:57,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 40363 transitions. [2021-06-05 16:50:57,099 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 40363 transitions. Word has length 28 [2021-06-05 16:50:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:57,099 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 40363 transitions. [2021-06-05 16:50:57,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 40363 transitions. [2021-06-05 16:50:57,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:57,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:57,114 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:57,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3553,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:57,314 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:57,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1430395937, now seen corresponding path program 103 times [2021-06-05 16:50:57,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:57,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426737995] [2021-06-05 16:50:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:57,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:57,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426737995] [2021-06-05 16:50:57,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426737995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:57,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883848930] [2021-06-05 16:50:57,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:57,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:57,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:57,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883848930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:57,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:57,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:50:57,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124914202] [2021-06-05 16:50:57,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:57,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:57,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:57,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:57,587 INFO L87 Difference]: Start difference. First operand 10613 states and 40363 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:58,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:50:58,829 INFO L93 Difference]: Finished difference Result 19418 states and 69911 transitions. [2021-06-05 16:50:58,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 16:50:58,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:50:58,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:50:58,870 INFO L225 Difference]: With dead ends: 19418 [2021-06-05 16:50:58,871 INFO L226 Difference]: Without dead ends: 19418 [2021-06-05 16:50:58,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 863.2ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 16:50:58,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19418 states. [2021-06-05 16:50:59,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19418 to 10725. [2021-06-05 16:50:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10725 states, 10724 states have (on average 3.7958784035807533) internal successors, (40707), 10724 states have internal predecessors, (40707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10725 states to 10725 states and 40707 transitions. [2021-06-05 16:50:59,189 INFO L78 Accepts]: Start accepts. Automaton has 10725 states and 40707 transitions. Word has length 28 [2021-06-05 16:50:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:50:59,189 INFO L482 AbstractCegarLoop]: Abstraction has 10725 states and 40707 transitions. [2021-06-05 16:50:59,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:50:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 10725 states and 40707 transitions. [2021-06-05 16:50:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:50:59,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:50:59,204 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:50:59,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3554,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:59,405 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:50:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:50:59,405 INFO L82 PathProgramCache]: Analyzing trace with hash 375018543, now seen corresponding path program 104 times [2021-06-05 16:50:59,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:50:59,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318847879] [2021-06-05 16:50:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:50:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:50:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:50:59,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:50:59,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318847879] [2021-06-05 16:50:59,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318847879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:59,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025417130] [2021-06-05 16:50:59,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:50:59,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:50:59,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:50:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:50:59,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:50:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:50:59,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025417130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:50:59,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:50:59,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:50:59,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334573991] [2021-06-05 16:50:59,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:50:59,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:50:59,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:50:59,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:50:59,568 INFO L87 Difference]: Start difference. First operand 10725 states and 40707 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:00,580 INFO L93 Difference]: Finished difference Result 18990 states and 68747 transitions. [2021-06-05 16:51:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:51:00,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:00,620 INFO L225 Difference]: With dead ends: 18990 [2021-06-05 16:51:00,620 INFO L226 Difference]: Without dead ends: 18986 [2021-06-05 16:51:00,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 608.1ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:51:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18986 states. [2021-06-05 16:51:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18986 to 10651. [2021-06-05 16:51:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10651 states, 10650 states have (on average 3.7998122065727697) internal successors, (40468), 10650 states have internal predecessors, (40468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10651 states to 10651 states and 40468 transitions. [2021-06-05 16:51:00,943 INFO L78 Accepts]: Start accepts. Automaton has 10651 states and 40468 transitions. Word has length 28 [2021-06-05 16:51:00,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:00,943 INFO L482 AbstractCegarLoop]: Abstraction has 10651 states and 40468 transitions. [2021-06-05 16:51:00,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:00,943 INFO L276 IsEmpty]: Start isEmpty. Operand 10651 states and 40468 transitions. [2021-06-05 16:51:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:00,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:00,958 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:01,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:01,158 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:01,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:01,159 INFO L82 PathProgramCache]: Analyzing trace with hash -156751667, now seen corresponding path program 105 times [2021-06-05 16:51:01,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:01,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649111012] [2021-06-05 16:51:01,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:01,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:01,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649111012] [2021-06-05 16:51:01,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649111012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:01,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114785098] [2021-06-05 16:51:01,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:01,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:51:01,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:01,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:01,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114785098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:01,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:01,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:51:01,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870251643] [2021-06-05 16:51:01,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:01,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:01,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:01,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:01,334 INFO L87 Difference]: Start difference. First operand 10651 states and 40468 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:02,436 INFO L93 Difference]: Finished difference Result 18417 states and 66232 transitions. [2021-06-05 16:51:02,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:51:02,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:02,477 INFO L225 Difference]: With dead ends: 18417 [2021-06-05 16:51:02,478 INFO L226 Difference]: Without dead ends: 18417 [2021-06-05 16:51:02,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 684.5ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:51:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18417 states. [2021-06-05 16:51:02,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18417 to 10878. [2021-06-05 16:51:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10878 states, 10877 states have (on average 3.803070699641445) internal successors, (41366), 10877 states have internal predecessors, (41366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:02,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10878 states to 10878 states and 41366 transitions. [2021-06-05 16:51:02,771 INFO L78 Accepts]: Start accepts. Automaton has 10878 states and 41366 transitions. Word has length 28 [2021-06-05 16:51:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:02,771 INFO L482 AbstractCegarLoop]: Abstraction has 10878 states and 41366 transitions. [2021-06-05 16:51:02,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:02,771 INFO L276 IsEmpty]: Start isEmpty. Operand 10878 states and 41366 transitions. [2021-06-05 16:51:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:02,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:02,787 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:02,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3556 [2021-06-05 16:51:02,987 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:02,987 INFO L82 PathProgramCache]: Analyzing trace with hash -534318835, now seen corresponding path program 106 times [2021-06-05 16:51:02,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:02,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833836776] [2021-06-05 16:51:02,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:03,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:03,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833836776] [2021-06-05 16:51:03,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833836776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:03,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349022662] [2021-06-05 16:51:03,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:03,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:03,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:03,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:03,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:03,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349022662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:03,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:03,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:51:03,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572609006] [2021-06-05 16:51:03,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:03,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:03,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:03,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:03,147 INFO L87 Difference]: Start difference. First operand 10878 states and 41366 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:04,158 INFO L93 Difference]: Finished difference Result 18127 states and 65426 transitions. [2021-06-05 16:51:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:51:04,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:04,198 INFO L225 Difference]: With dead ends: 18127 [2021-06-05 16:51:04,199 INFO L226 Difference]: Without dead ends: 18115 [2021-06-05 16:51:04,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 591.9ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:51:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18115 states. [2021-06-05 16:51:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18115 to 10980. [2021-06-05 16:51:04,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 3.79715821113034) internal successors, (41689), 10979 states have internal predecessors, (41689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:04,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 41689 transitions. [2021-06-05 16:51:04,520 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 41689 transitions. Word has length 28 [2021-06-05 16:51:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:04,520 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 41689 transitions. [2021-06-05 16:51:04,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 41689 transitions. [2021-06-05 16:51:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:04,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:04,537 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:04,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:04,737 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:04,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1732149001, now seen corresponding path program 73 times [2021-06-05 16:51:04,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:04,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911795228] [2021-06-05 16:51:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:04,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:04,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911795228] [2021-06-05 16:51:04,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911795228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:04,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053100802] [2021-06-05 16:51:04,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:04,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:04,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053100802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:04,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:04,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:51:04,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7072298] [2021-06-05 16:51:04,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:04,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:04,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:04,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:04,871 INFO L87 Difference]: Start difference. First operand 10980 states and 41689 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:05,342 INFO L93 Difference]: Finished difference Result 15635 states and 57800 transitions. [2021-06-05 16:51:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:51:05,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:05,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:05,374 INFO L225 Difference]: With dead ends: 15635 [2021-06-05 16:51:05,375 INFO L226 Difference]: Without dead ends: 15635 [2021-06-05 16:51:05,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:51:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15635 states. [2021-06-05 16:51:05,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15635 to 11052. [2021-06-05 16:51:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 11051 states have (on average 3.7925074653877475) internal successors, (41911), 11051 states have internal predecessors, (41911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 41911 transitions. [2021-06-05 16:51:05,622 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 41911 transitions. Word has length 28 [2021-06-05 16:51:05,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:05,622 INFO L482 AbstractCegarLoop]: Abstraction has 11052 states and 41911 transitions. [2021-06-05 16:51:05,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 41911 transitions. [2021-06-05 16:51:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:05,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:05,638 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:05,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3558,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:05,839 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:05,839 INFO L82 PathProgramCache]: Analyzing trace with hash -38357591, now seen corresponding path program 74 times [2021-06-05 16:51:05,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:05,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880205614] [2021-06-05 16:51:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:05,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:05,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880205614] [2021-06-05 16:51:05,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880205614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:05,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049786030] [2021-06-05 16:51:05,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:05,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:05,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:05,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:05,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049786030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:05,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:05,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:51:05,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867299478] [2021-06-05 16:51:05,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:51:05,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:05,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:51:05,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:51:05,966 INFO L87 Difference]: Start difference. First operand 11052 states and 41911 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:06,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:06,513 INFO L93 Difference]: Finished difference Result 16589 states and 60571 transitions. [2021-06-05 16:51:06,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:51:06,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:06,547 INFO L225 Difference]: With dead ends: 16589 [2021-06-05 16:51:06,547 INFO L226 Difference]: Without dead ends: 16589 [2021-06-05 16:51:06,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:51:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16589 states. [2021-06-05 16:51:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16589 to 11366. [2021-06-05 16:51:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11366 states, 11365 states have (on average 3.7756269247690275) internal successors, (42910), 11365 states have internal predecessors, (42910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11366 states to 11366 states and 42910 transitions. [2021-06-05 16:51:06,807 INFO L78 Accepts]: Start accepts. Automaton has 11366 states and 42910 transitions. Word has length 28 [2021-06-05 16:51:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:06,807 INFO L482 AbstractCegarLoop]: Abstraction has 11366 states and 42910 transitions. [2021-06-05 16:51:06,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 11366 states and 42910 transitions. [2021-06-05 16:51:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:06,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:06,823 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:07,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3559,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:07,023 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:07,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:07,024 INFO L82 PathProgramCache]: Analyzing trace with hash 907762153, now seen corresponding path program 75 times [2021-06-05 16:51:07,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:07,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962038911] [2021-06-05 16:51:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:07,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:07,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962038911] [2021-06-05 16:51:07,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962038911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:07,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460614444] [2021-06-05 16:51:07,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:07,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:51:07,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:07,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:07,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460614444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:07,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:07,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:51:07,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811692] [2021-06-05 16:51:07,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:51:07,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:07,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:51:07,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:51:07,145 INFO L87 Difference]: Start difference. First operand 11366 states and 42910 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:07,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:07,581 INFO L93 Difference]: Finished difference Result 16097 states and 59284 transitions. [2021-06-05 16:51:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:51:07,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:07,611 INFO L225 Difference]: With dead ends: 16097 [2021-06-05 16:51:07,611 INFO L226 Difference]: Without dead ends: 16089 [2021-06-05 16:51:07,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:51:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16089 states. [2021-06-05 16:51:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16089 to 11306. [2021-06-05 16:51:07,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11306 states, 11305 states have (on average 3.77797434763379) internal successors, (42710), 11305 states have internal predecessors, (42710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11306 states to 11306 states and 42710 transitions. [2021-06-05 16:51:07,897 INFO L78 Accepts]: Start accepts. Automaton has 11306 states and 42710 transitions. Word has length 28 [2021-06-05 16:51:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:07,897 INFO L482 AbstractCegarLoop]: Abstraction has 11306 states and 42710 transitions. [2021-06-05 16:51:07,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 11306 states and 42710 transitions. [2021-06-05 16:51:07,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:07,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:07,914 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:08,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3560,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:08,115 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:08,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:08,115 INFO L82 PathProgramCache]: Analyzing trace with hash -13939987, now seen corresponding path program 76 times [2021-06-05 16:51:08,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:08,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248276285] [2021-06-05 16:51:08,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:08,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:08,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248276285] [2021-06-05 16:51:08,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248276285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:08,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243896905] [2021-06-05 16:51:08,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:08,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:08,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:08,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:08,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:08,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243896905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:08,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:08,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:51:08,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574411485] [2021-06-05 16:51:08,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:08,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:08,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:08,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:08,240 INFO L87 Difference]: Start difference. First operand 11306 states and 42710 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:08,718 INFO L93 Difference]: Finished difference Result 15997 states and 59000 transitions. [2021-06-05 16:51:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:51:08,718 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:08,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:08,754 INFO L225 Difference]: With dead ends: 15997 [2021-06-05 16:51:08,755 INFO L226 Difference]: Without dead ends: 15985 [2021-06-05 16:51:08,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:51:08,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15985 states. [2021-06-05 16:51:08,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15985 to 11272. [2021-06-05 16:51:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 11271 states have (on average 3.780055008428711) internal successors, (42605), 11271 states have internal predecessors, (42605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 42605 transitions. [2021-06-05 16:51:09,009 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 42605 transitions. Word has length 28 [2021-06-05 16:51:09,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:09,009 INFO L482 AbstractCegarLoop]: Abstraction has 11272 states and 42605 transitions. [2021-06-05 16:51:09,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 42605 transitions. [2021-06-05 16:51:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:09,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:09,026 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:09,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3561 [2021-06-05 16:51:09,227 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:09,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash -141251547, now seen corresponding path program 77 times [2021-06-05 16:51:09,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:09,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964395797] [2021-06-05 16:51:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:09,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:09,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964395797] [2021-06-05 16:51:09,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964395797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:09,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239315921] [2021-06-05 16:51:09,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:09,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:51:09,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:09,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:09,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:09,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239315921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:09,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:09,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:51:09,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244135660] [2021-06-05 16:51:09,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:51:09,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:09,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:51:09,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:51:09,387 INFO L87 Difference]: Start difference. First operand 11272 states and 42605 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:10,363 INFO L93 Difference]: Finished difference Result 21775 states and 77547 transitions. [2021-06-05 16:51:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:51:10,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:10,404 INFO L225 Difference]: With dead ends: 21775 [2021-06-05 16:51:10,404 INFO L226 Difference]: Without dead ends: 21775 [2021-06-05 16:51:10,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 535.0ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:51:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21775 states. [2021-06-05 16:51:10,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21775 to 11246. [2021-06-05 16:51:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11246 states, 11245 states have (on average 3.779101823032459) internal successors, (42496), 11245 states have internal predecessors, (42496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 42496 transitions. [2021-06-05 16:51:10,704 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 42496 transitions. Word has length 28 [2021-06-05 16:51:10,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:10,704 INFO L482 AbstractCegarLoop]: Abstraction has 11246 states and 42496 transitions. [2021-06-05 16:51:10,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:10,704 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 42496 transitions. [2021-06-05 16:51:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:10,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:10,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:10,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3562 [2021-06-05 16:51:10,922 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:10,922 INFO L82 PathProgramCache]: Analyzing trace with hash 385520361, now seen corresponding path program 107 times [2021-06-05 16:51:10,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:10,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839430503] [2021-06-05 16:51:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:10,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:10,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839430503] [2021-06-05 16:51:10,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839430503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:10,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119745334] [2021-06-05 16:51:10,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:10,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:51:10,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:10,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:51:10,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:11,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119745334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:11,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:11,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:51:11,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93424191] [2021-06-05 16:51:11,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:11,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:11,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:11,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:11,065 INFO L87 Difference]: Start difference. First operand 11246 states and 42496 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:11,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:11,822 INFO L93 Difference]: Finished difference Result 17570 states and 63375 transitions. [2021-06-05 16:51:11,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:51:11,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:11,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:11,856 INFO L225 Difference]: With dead ends: 17570 [2021-06-05 16:51:11,856 INFO L226 Difference]: Without dead ends: 17557 [2021-06-05 16:51:11,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:51:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17557 states. [2021-06-05 16:51:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17557 to 12557. [2021-06-05 16:51:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12557 states, 12556 states have (on average 3.8467664861420836) internal successors, (48300), 12556 states have internal predecessors, (48300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:12,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12557 states to 12557 states and 48300 transitions. [2021-06-05 16:51:12,188 INFO L78 Accepts]: Start accepts. Automaton has 12557 states and 48300 transitions. Word has length 28 [2021-06-05 16:51:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:12,188 INFO L482 AbstractCegarLoop]: Abstraction has 12557 states and 48300 transitions. [2021-06-05 16:51:12,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:12,188 INFO L276 IsEmpty]: Start isEmpty. Operand 12557 states and 48300 transitions. [2021-06-05 16:51:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:12,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:12,209 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:12,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3563,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:12,410 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:12,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:12,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1057933143, now seen corresponding path program 108 times [2021-06-05 16:51:12,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:12,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712387101] [2021-06-05 16:51:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:12,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:12,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712387101] [2021-06-05 16:51:12,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712387101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:12,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365266447] [2021-06-05 16:51:12,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:12,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:51:12,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:12,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:51:12,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:12,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365266447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:12,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:12,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:51:12,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376180037] [2021-06-05 16:51:12,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:12,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:12,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:12,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:12,570 INFO L87 Difference]: Start difference. First operand 12557 states and 48300 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:13,371 INFO L93 Difference]: Finished difference Result 17668 states and 63624 transitions. [2021-06-05 16:51:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:51:13,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:13,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:13,406 INFO L225 Difference]: With dead ends: 17668 [2021-06-05 16:51:13,406 INFO L226 Difference]: Without dead ends: 17662 [2021-06-05 16:51:13,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:51:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17662 states. [2021-06-05 16:51:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17662 to 12530. [2021-06-05 16:51:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12529 states have (on average 3.845957378880996) internal successors, (48186), 12529 states have internal predecessors, (48186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 48186 transitions. [2021-06-05 16:51:13,705 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 48186 transitions. Word has length 28 [2021-06-05 16:51:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:13,705 INFO L482 AbstractCegarLoop]: Abstraction has 12530 states and 48186 transitions. [2021-06-05 16:51:13,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 48186 transitions. [2021-06-05 16:51:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:13,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:13,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:13,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:13,923 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:13,923 INFO L82 PathProgramCache]: Analyzing trace with hash -757405679, now seen corresponding path program 109 times [2021-06-05 16:51:13,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:13,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901860261] [2021-06-05 16:51:13,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:13,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:13,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901860261] [2021-06-05 16:51:13,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901860261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:13,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160547898] [2021-06-05 16:51:13,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:51:13,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:14,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160547898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:14,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:14,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:51:14,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500215005] [2021-06-05 16:51:14,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:14,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:14,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:14,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:14,054 INFO L87 Difference]: Start difference. First operand 12530 states and 48186 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:14,686 INFO L93 Difference]: Finished difference Result 19731 states and 71148 transitions. [2021-06-05 16:51:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:51:14,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:14,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:14,723 INFO L225 Difference]: With dead ends: 19731 [2021-06-05 16:51:14,723 INFO L226 Difference]: Without dead ends: 19718 [2021-06-05 16:51:14,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 333.0ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:51:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19718 states. [2021-06-05 16:51:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19718 to 12590. [2021-06-05 16:51:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12590 states, 12589 states have (on average 3.850663277464453) internal successors, (48476), 12589 states have internal predecessors, (48476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12590 states to 12590 states and 48476 transitions. [2021-06-05 16:51:15,051 INFO L78 Accepts]: Start accepts. Automaton has 12590 states and 48476 transitions. Word has length 28 [2021-06-05 16:51:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:15,051 INFO L482 AbstractCegarLoop]: Abstraction has 12590 states and 48476 transitions. [2021-06-05 16:51:15,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 12590 states and 48476 transitions. [2021-06-05 16:51:15,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:15,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:15,073 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:15,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3565,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:15,273 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:15,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1440150009, now seen corresponding path program 110 times [2021-06-05 16:51:15,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:15,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241155910] [2021-06-05 16:51:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:15,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:15,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241155910] [2021-06-05 16:51:15,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241155910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:15,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620335529] [2021-06-05 16:51:15,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:15,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:15,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:15,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:51:15,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:15,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620335529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:15,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:15,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:51:15,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510208398] [2021-06-05 16:51:15,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:15,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:15,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:15,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:15,412 INFO L87 Difference]: Start difference. First operand 12590 states and 48476 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:16,154 INFO L93 Difference]: Finished difference Result 20868 states and 74696 transitions. [2021-06-05 16:51:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:51:16,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:16,194 INFO L225 Difference]: With dead ends: 20868 [2021-06-05 16:51:16,194 INFO L226 Difference]: Without dead ends: 20868 [2021-06-05 16:51:16,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:51:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20868 states. [2021-06-05 16:51:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20868 to 12606. [2021-06-05 16:51:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12606 states, 12605 states have (on average 3.8476001586671957) internal successors, (48499), 12605 states have internal predecessors, (48499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12606 states to 12606 states and 48499 transitions. [2021-06-05 16:51:16,518 INFO L78 Accepts]: Start accepts. Automaton has 12606 states and 48499 transitions. Word has length 28 [2021-06-05 16:51:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:16,518 INFO L482 AbstractCegarLoop]: Abstraction has 12606 states and 48499 transitions. [2021-06-05 16:51:16,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 12606 states and 48499 transitions. [2021-06-05 16:51:16,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:16,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:16,538 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:16,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3566,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:16,739 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:16,739 INFO L82 PathProgramCache]: Analyzing trace with hash -373053407, now seen corresponding path program 78 times [2021-06-05 16:51:16,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:16,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303718275] [2021-06-05 16:51:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:16,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:16,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303718275] [2021-06-05 16:51:16,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303718275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:16,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82970978] [2021-06-05 16:51:16,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:16,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:51:16,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:16,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:16,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:16,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82970978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:16,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:16,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:51:16,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20128999] [2021-06-05 16:51:16,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:16,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:16,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:16,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:16,904 INFO L87 Difference]: Start difference. First operand 12606 states and 48499 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:17,868 INFO L93 Difference]: Finished difference Result 21980 states and 80698 transitions. [2021-06-05 16:51:17,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:51:17,869 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:17,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:17,912 INFO L225 Difference]: With dead ends: 21980 [2021-06-05 16:51:17,912 INFO L226 Difference]: Without dead ends: 21976 [2021-06-05 16:51:17,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 553.7ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:51:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2021-06-05 16:51:18,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 12860. [2021-06-05 16:51:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12860 states, 12859 states have (on average 3.837001322031262) internal successors, (49340), 12859 states have internal predecessors, (49340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12860 states to 12860 states and 49340 transitions. [2021-06-05 16:51:18,250 INFO L78 Accepts]: Start accepts. Automaton has 12860 states and 49340 transitions. Word has length 28 [2021-06-05 16:51:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:18,250 INFO L482 AbstractCegarLoop]: Abstraction has 12860 states and 49340 transitions. [2021-06-05 16:51:18,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 12860 states and 49340 transitions. [2021-06-05 16:51:18,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:18,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:18,272 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:18,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3567,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:18,472 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:18,472 INFO L82 PathProgramCache]: Analyzing trace with hash -498610355, now seen corresponding path program 111 times [2021-06-05 16:51:18,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:18,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877584899] [2021-06-05 16:51:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:18,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:18,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877584899] [2021-06-05 16:51:18,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877584899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:18,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379701105] [2021-06-05 16:51:18,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:18,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:51:18,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:18,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:51:18,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:18,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379701105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:18,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:18,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:51:18,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857309145] [2021-06-05 16:51:18,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:18,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:18,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:18,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:18,609 INFO L87 Difference]: Start difference. First operand 12860 states and 49340 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:19,259 INFO L93 Difference]: Finished difference Result 18670 states and 68341 transitions. [2021-06-05 16:51:19,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:51:19,259 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:19,296 INFO L225 Difference]: With dead ends: 18670 [2021-06-05 16:51:19,296 INFO L226 Difference]: Without dead ends: 18647 [2021-06-05 16:51:19,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 349.0ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:51:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18647 states. [2021-06-05 16:51:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18647 to 13152. [2021-06-05 16:51:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13152 states, 13151 states have (on average 3.854307657212379) internal successors, (50688), 13151 states have internal predecessors, (50688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13152 states to 13152 states and 50688 transitions. [2021-06-05 16:51:19,708 INFO L78 Accepts]: Start accepts. Automaton has 13152 states and 50688 transitions. Word has length 28 [2021-06-05 16:51:19,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:19,709 INFO L482 AbstractCegarLoop]: Abstraction has 13152 states and 50688 transitions. [2021-06-05 16:51:19,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:19,709 INFO L276 IsEmpty]: Start isEmpty. Operand 13152 states and 50688 transitions. [2021-06-05 16:51:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:19,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:19,729 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:19,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3568 [2021-06-05 16:51:19,933 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1181354685, now seen corresponding path program 112 times [2021-06-05 16:51:19,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:19,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175621999] [2021-06-05 16:51:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:19,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:19,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175621999] [2021-06-05 16:51:19,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175621999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:19,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294982643] [2021-06-05 16:51:19,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:19,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:19,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:19,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:51:19,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:20,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294982643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:20,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:20,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:51:20,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755784580] [2021-06-05 16:51:20,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:20,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:20,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:20,067 INFO L87 Difference]: Start difference. First operand 13152 states and 50688 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:20,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:20,796 INFO L93 Difference]: Finished difference Result 18648 states and 67382 transitions. [2021-06-05 16:51:20,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:51:20,797 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:20,828 INFO L225 Difference]: With dead ends: 18648 [2021-06-05 16:51:20,829 INFO L226 Difference]: Without dead ends: 18648 [2021-06-05 16:51:20,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:51:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2021-06-05 16:51:21,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 13107. [2021-06-05 16:51:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13107 states, 13106 states have (on average 3.8461010224324736) internal successors, (50407), 13106 states have internal predecessors, (50407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13107 states to 13107 states and 50407 transitions. [2021-06-05 16:51:21,111 INFO L78 Accepts]: Start accepts. Automaton has 13107 states and 50407 transitions. Word has length 28 [2021-06-05 16:51:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:21,111 INFO L482 AbstractCegarLoop]: Abstraction has 13107 states and 50407 transitions. [2021-06-05 16:51:21,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 13107 states and 50407 transitions. [2021-06-05 16:51:21,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:21,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:21,134 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:21,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3569,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:21,337 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1501473149, now seen corresponding path program 113 times [2021-06-05 16:51:21,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:21,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149336223] [2021-06-05 16:51:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:21,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:21,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149336223] [2021-06-05 16:51:21,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149336223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:21,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406456958] [2021-06-05 16:51:21,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:21,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:51:21,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:21,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:51:21,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:21,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406456958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:21,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:21,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:51:21,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260833740] [2021-06-05 16:51:21,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:21,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:21,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:21,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:21,482 INFO L87 Difference]: Start difference. First operand 13107 states and 50407 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:22,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:22,158 INFO L93 Difference]: Finished difference Result 19972 states and 72578 transitions. [2021-06-05 16:51:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:51:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:22,196 INFO L225 Difference]: With dead ends: 19972 [2021-06-05 16:51:22,196 INFO L226 Difference]: Without dead ends: 19972 [2021-06-05 16:51:22,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:51:22,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19972 states. [2021-06-05 16:51:22,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19972 to 13820. [2021-06-05 16:51:22,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13820 states, 13819 states have (on average 3.832259931977712) internal successors, (52958), 13819 states have internal predecessors, (52958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13820 states to 13820 states and 52958 transitions. [2021-06-05 16:51:22,492 INFO L78 Accepts]: Start accepts. Automaton has 13820 states and 52958 transitions. Word has length 28 [2021-06-05 16:51:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:22,492 INFO L482 AbstractCegarLoop]: Abstraction has 13820 states and 52958 transitions. [2021-06-05 16:51:22,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 13820 states and 52958 transitions. [2021-06-05 16:51:22,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:22,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:22,513 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:22,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3570,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:22,713 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:22,714 INFO L82 PathProgramCache]: Analyzing trace with hash -612070185, now seen corresponding path program 114 times [2021-06-05 16:51:22,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:22,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208680711] [2021-06-05 16:51:22,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:22,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:22,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208680711] [2021-06-05 16:51:22,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208680711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:22,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509215810] [2021-06-05 16:51:22,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:22,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:51:22,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:22,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:51:22,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:22,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509215810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:22,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:22,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:51:22,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045291991] [2021-06-05 16:51:22,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:22,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:22,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:22,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:22,861 INFO L87 Difference]: Start difference. First operand 13820 states and 52958 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:23,727 INFO L93 Difference]: Finished difference Result 22381 states and 80178 transitions. [2021-06-05 16:51:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:51:23,727 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:23,775 INFO L225 Difference]: With dead ends: 22381 [2021-06-05 16:51:23,775 INFO L226 Difference]: Without dead ends: 22381 [2021-06-05 16:51:23,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 491.0ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:51:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22381 states. [2021-06-05 16:51:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22381 to 14048. [2021-06-05 16:51:24,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14048 states, 14047 states have (on average 3.843881255784153) internal successors, (53995), 14047 states have internal predecessors, (53995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14048 states to 14048 states and 53995 transitions. [2021-06-05 16:51:24,159 INFO L78 Accepts]: Start accepts. Automaton has 14048 states and 53995 transitions. Word has length 28 [2021-06-05 16:51:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:24,159 INFO L482 AbstractCegarLoop]: Abstraction has 14048 states and 53995 transitions. [2021-06-05 16:51:24,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 14048 states and 53995 transitions. [2021-06-05 16:51:24,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:24,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:24,180 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:24,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3571 [2021-06-05 16:51:24,381 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:24,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1934603223, now seen corresponding path program 79 times [2021-06-05 16:51:24,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:24,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556677205] [2021-06-05 16:51:24,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:24,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:24,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556677205] [2021-06-05 16:51:24,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556677205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:24,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192926547] [2021-06-05 16:51:24,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:24,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:24,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:24,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192926547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:24,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:24,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:51:24,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002208913] [2021-06-05 16:51:24,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:24,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:24,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:24,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:24,552 INFO L87 Difference]: Start difference. First operand 14048 states and 53995 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:26,125 INFO L93 Difference]: Finished difference Result 39001 states and 140171 transitions. [2021-06-05 16:51:26,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:51:26,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:26,225 INFO L225 Difference]: With dead ends: 39001 [2021-06-05 16:51:26,225 INFO L226 Difference]: Without dead ends: 39001 [2021-06-05 16:51:26,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 927.0ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:51:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39001 states. [2021-06-05 16:51:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39001 to 15286. [2021-06-05 16:51:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15286 states, 15285 states have (on average 3.890677134445535) internal successors, (59469), 15285 states have internal predecessors, (59469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15286 states to 15286 states and 59469 transitions. [2021-06-05 16:51:26,789 INFO L78 Accepts]: Start accepts. Automaton has 15286 states and 59469 transitions. Word has length 28 [2021-06-05 16:51:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:26,789 INFO L482 AbstractCegarLoop]: Abstraction has 15286 states and 59469 transitions. [2021-06-05 16:51:26,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 15286 states and 59469 transitions. [2021-06-05 16:51:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:26,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:26,811 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:27,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3572 [2021-06-05 16:51:27,011 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:27,012 INFO L82 PathProgramCache]: Analyzing trace with hash -405698579, now seen corresponding path program 80 times [2021-06-05 16:51:27,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:27,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324925183] [2021-06-05 16:51:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:27,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:27,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324925183] [2021-06-05 16:51:27,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324925183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:27,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839838982] [2021-06-05 16:51:27,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:27,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:27,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:27,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:27,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839838982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:27,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:27,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:51:27,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915739525] [2021-06-05 16:51:27,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:27,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:27,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:27,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:27,175 INFO L87 Difference]: Start difference. First operand 15286 states and 59469 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:28,754 INFO L93 Difference]: Finished difference Result 38023 states and 137597 transitions. [2021-06-05 16:51:28,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:51:28,754 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:28,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:28,847 INFO L225 Difference]: With dead ends: 38023 [2021-06-05 16:51:28,848 INFO L226 Difference]: Without dead ends: 38023 [2021-06-05 16:51:28,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 929.6ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:51:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38023 states. [2021-06-05 16:51:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38023 to 15260. [2021-06-05 16:51:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15260 states, 15259 states have (on average 3.8870830329641524) internal successors, (59313), 15259 states have internal predecessors, (59313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15260 states to 15260 states and 59313 transitions. [2021-06-05 16:51:29,365 INFO L78 Accepts]: Start accepts. Automaton has 15260 states and 59313 transitions. Word has length 28 [2021-06-05 16:51:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:29,366 INFO L482 AbstractCegarLoop]: Abstraction has 15260 states and 59313 transitions. [2021-06-05 16:51:29,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 15260 states and 59313 transitions. [2021-06-05 16:51:29,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:29,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:29,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:29,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3573 [2021-06-05 16:51:29,589 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:29,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:29,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1649877491, now seen corresponding path program 115 times [2021-06-05 16:51:29,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:29,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788826987] [2021-06-05 16:51:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:29,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:29,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788826987] [2021-06-05 16:51:29,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788826987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:29,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701827383] [2021-06-05 16:51:29,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:29,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:51:29,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:29,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701827383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:29,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:29,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:51:29,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372312843] [2021-06-05 16:51:29,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:51:29,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:29,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:51:29,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:51:29,706 INFO L87 Difference]: Start difference. First operand 15260 states and 59313 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:29,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:29,998 INFO L93 Difference]: Finished difference Result 23613 states and 90414 transitions. [2021-06-05 16:51:29,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:51:29,998 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:30,048 INFO L225 Difference]: With dead ends: 23613 [2021-06-05 16:51:30,049 INFO L226 Difference]: Without dead ends: 23563 [2021-06-05 16:51:30,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:51:30,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23563 states. [2021-06-05 16:51:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23563 to 20372. [2021-06-05 16:51:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20372 states, 20371 states have (on average 3.902803004270777) internal successors, (79504), 20371 states have internal predecessors, (79504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:30,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20372 states to 20372 states and 79504 transitions. [2021-06-05 16:51:30,436 INFO L78 Accepts]: Start accepts. Automaton has 20372 states and 79504 transitions. Word has length 28 [2021-06-05 16:51:30,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:30,436 INFO L482 AbstractCegarLoop]: Abstraction has 20372 states and 79504 transitions. [2021-06-05 16:51:30,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:30,436 INFO L276 IsEmpty]: Start isEmpty. Operand 20372 states and 79504 transitions. [2021-06-05 16:51:30,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:30,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:30,465 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:30,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3574,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:30,665 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:30,666 INFO L82 PathProgramCache]: Analyzing trace with hash 260189251, now seen corresponding path program 116 times [2021-06-05 16:51:30,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:30,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243762446] [2021-06-05 16:51:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:30,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:30,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243762446] [2021-06-05 16:51:30,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243762446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:30,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586742171] [2021-06-05 16:51:30,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:30,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:30,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:30,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:51:30,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:30,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586742171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:30,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:30,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:51:30,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774729917] [2021-06-05 16:51:30,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:51:30,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:30,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:51:30,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:51:30,780 INFO L87 Difference]: Start difference. First operand 20372 states and 79504 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:31,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:31,023 INFO L93 Difference]: Finished difference Result 23123 states and 87862 transitions. [2021-06-05 16:51:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:51:31,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:31,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:31,074 INFO L225 Difference]: With dead ends: 23123 [2021-06-05 16:51:31,075 INFO L226 Difference]: Without dead ends: 23123 [2021-06-05 16:51:31,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:51:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23123 states. [2021-06-05 16:51:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23123 to 19875. [2021-06-05 16:51:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19875 states, 19874 states have (on average 3.891114018315387) internal successors, (77332), 19874 states have internal predecessors, (77332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19875 states to 19875 states and 77332 transitions. [2021-06-05 16:51:31,583 INFO L78 Accepts]: Start accepts. Automaton has 19875 states and 77332 transitions. Word has length 28 [2021-06-05 16:51:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:31,583 INFO L482 AbstractCegarLoop]: Abstraction has 19875 states and 77332 transitions. [2021-06-05 16:51:31,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 19875 states and 77332 transitions. [2021-06-05 16:51:31,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:31,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:31,613 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:31,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3575 [2021-06-05 16:51:31,813 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:31,813 INFO L82 PathProgramCache]: Analyzing trace with hash -691492187, now seen corresponding path program 117 times [2021-06-05 16:51:31,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:31,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401207821] [2021-06-05 16:51:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:31,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:31,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401207821] [2021-06-05 16:51:31,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401207821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:31,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257685214] [2021-06-05 16:51:31,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:31,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:51:31,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:31,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:31,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:31,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257685214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:31,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:31,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:51:31,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445168395] [2021-06-05 16:51:31,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:51:31,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:31,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:51:31,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:51:31,980 INFO L87 Difference]: Start difference. First operand 19875 states and 77332 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:32,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:32,924 INFO L93 Difference]: Finished difference Result 31643 states and 117215 transitions. [2021-06-05 16:51:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:51:32,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:32,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:33,005 INFO L225 Difference]: With dead ends: 31643 [2021-06-05 16:51:33,005 INFO L226 Difference]: Without dead ends: 31643 [2021-06-05 16:51:33,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 506.9ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:51:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31643 states. [2021-06-05 16:51:33,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31643 to 19937. [2021-06-05 16:51:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19937 states, 19936 states have (on average 3.889446227929374) internal successors, (77540), 19936 states have internal predecessors, (77540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19937 states to 19937 states and 77540 transitions. [2021-06-05 16:51:33,545 INFO L78 Accepts]: Start accepts. Automaton has 19937 states and 77540 transitions. Word has length 28 [2021-06-05 16:51:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:33,545 INFO L482 AbstractCegarLoop]: Abstraction has 19937 states and 77540 transitions. [2021-06-05 16:51:33,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 19937 states and 77540 transitions. [2021-06-05 16:51:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:33,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:33,575 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:33,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3576,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:33,776 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:33,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:33,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1667811031, now seen corresponding path program 118 times [2021-06-05 16:51:33,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:33,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92118219] [2021-06-05 16:51:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:33,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:33,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92118219] [2021-06-05 16:51:33,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92118219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:33,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578589756] [2021-06-05 16:51:33,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:33,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:33,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:33,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:33,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:33,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578589756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:33,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:33,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:51:33,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583048788] [2021-06-05 16:51:33,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:33,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:33,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:33,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:33,938 INFO L87 Difference]: Start difference. First operand 19937 states and 77540 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:35,467 INFO L93 Difference]: Finished difference Result 40452 states and 148213 transitions. [2021-06-05 16:51:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:51:35,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:35,564 INFO L225 Difference]: With dead ends: 40452 [2021-06-05 16:51:35,564 INFO L226 Difference]: Without dead ends: 40452 [2021-06-05 16:51:35,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 915.5ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 16:51:35,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40452 states. [2021-06-05 16:51:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40452 to 19942. [2021-06-05 16:51:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19942 states, 19941 states have (on average 3.891530013539943) internal successors, (77601), 19941 states have internal predecessors, (77601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19942 states to 19942 states and 77601 transitions. [2021-06-05 16:51:36,219 INFO L78 Accepts]: Start accepts. Automaton has 19942 states and 77601 transitions. Word has length 28 [2021-06-05 16:51:36,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:36,219 INFO L482 AbstractCegarLoop]: Abstraction has 19942 states and 77601 transitions. [2021-06-05 16:51:36,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:36,219 INFO L276 IsEmpty]: Start isEmpty. Operand 19942 states and 77601 transitions. [2021-06-05 16:51:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:36,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:36,249 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:36,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:36,449 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:36,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:36,450 INFO L82 PathProgramCache]: Analyzing trace with hash -138906387, now seen corresponding path program 119 times [2021-06-05 16:51:36,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:36,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917515143] [2021-06-05 16:51:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:36,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:36,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917515143] [2021-06-05 16:51:36,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917515143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:36,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582308754] [2021-06-05 16:51:36,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:36,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:51:36,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:36,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:36,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:36,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582308754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:36,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:36,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:51:36,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683028850] [2021-06-05 16:51:36,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:51:36,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:36,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:51:36,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:51:36,623 INFO L87 Difference]: Start difference. First operand 19942 states and 77601 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:38,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:38,130 INFO L93 Difference]: Finished difference Result 40013 states and 147353 transitions. [2021-06-05 16:51:38,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:51:38,130 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:38,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:38,221 INFO L225 Difference]: With dead ends: 40013 [2021-06-05 16:51:38,221 INFO L226 Difference]: Without dead ends: 40013 [2021-06-05 16:51:38,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 898.1ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 16:51:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40013 states. [2021-06-05 16:51:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40013 to 19730. [2021-06-05 16:51:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19730 states, 19729 states have (on average 3.8836230929089157) internal successors, (76620), 19729 states have internal predecessors, (76620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19730 states to 19730 states and 76620 transitions. [2021-06-05 16:51:38,828 INFO L78 Accepts]: Start accepts. Automaton has 19730 states and 76620 transitions. Word has length 28 [2021-06-05 16:51:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:38,828 INFO L482 AbstractCegarLoop]: Abstraction has 19730 states and 76620 transitions. [2021-06-05 16:51:38,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:38,828 INFO L276 IsEmpty]: Start isEmpty. Operand 19730 states and 76620 transitions. [2021-06-05 16:51:38,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:38,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:38,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:39,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3578 [2021-06-05 16:51:39,059 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:39,059 INFO L82 PathProgramCache]: Analyzing trace with hash -164720279, now seen corresponding path program 120 times [2021-06-05 16:51:39,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:39,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029449256] [2021-06-05 16:51:39,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:39,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:39,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029449256] [2021-06-05 16:51:39,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029449256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:39,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755644179] [2021-06-05 16:51:39,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:39,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:51:39,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:39,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:51:39,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:51:39,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755644179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:39,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:39,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:51:39,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079412189] [2021-06-05 16:51:39,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:51:39,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:39,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:51:39,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:51:39,309 INFO L87 Difference]: Start difference. First operand 19730 states and 76620 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:39,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:39,622 INFO L93 Difference]: Finished difference Result 29201 states and 109016 transitions. [2021-06-05 16:51:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:51:39,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:39,699 INFO L225 Difference]: With dead ends: 29201 [2021-06-05 16:51:39,699 INFO L226 Difference]: Without dead ends: 29184 [2021-06-05 16:51:39,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:51:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29184 states. [2021-06-05 16:51:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29184 to 19998. [2021-06-05 16:51:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19998 states, 19997 states have (on average 3.889183377506626) internal successors, (77772), 19997 states have internal predecessors, (77772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19998 states to 19998 states and 77772 transitions. [2021-06-05 16:51:40,242 INFO L78 Accepts]: Start accepts. Automaton has 19998 states and 77772 transitions. Word has length 28 [2021-06-05 16:51:40,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:40,242 INFO L482 AbstractCegarLoop]: Abstraction has 19998 states and 77772 transitions. [2021-06-05 16:51:40,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:40,242 INFO L276 IsEmpty]: Start isEmpty. Operand 19998 states and 77772 transitions. [2021-06-05 16:51:40,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:40,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:40,271 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:40,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3579,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:40,472 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:40,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1307646319, now seen corresponding path program 121 times [2021-06-05 16:51:40,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:40,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395983933] [2021-06-05 16:51:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:40,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:40,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395983933] [2021-06-05 16:51:40,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395983933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:40,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808932206] [2021-06-05 16:51:40,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:40,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:51:40,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:51:40,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808932206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:40,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:40,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:51:40,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819179752] [2021-06-05 16:51:40,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:51:40,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:40,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:51:40,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:51:40,590 INFO L87 Difference]: Start difference. First operand 19998 states and 77772 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:40,868 INFO L93 Difference]: Finished difference Result 30984 states and 114572 transitions. [2021-06-05 16:51:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:51:40,869 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:40,936 INFO L225 Difference]: With dead ends: 30984 [2021-06-05 16:51:40,936 INFO L226 Difference]: Without dead ends: 30984 [2021-06-05 16:51:40,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:51:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30984 states. [2021-06-05 16:51:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30984 to 19667. [2021-06-05 16:51:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19667 states, 19666 states have (on average 3.8739957286687683) internal successors, (76186), 19666 states have internal predecessors, (76186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19667 states to 19667 states and 76186 transitions. [2021-06-05 16:51:41,373 INFO L78 Accepts]: Start accepts. Automaton has 19667 states and 76186 transitions. Word has length 28 [2021-06-05 16:51:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:41,373 INFO L482 AbstractCegarLoop]: Abstraction has 19667 states and 76186 transitions. [2021-06-05 16:51:41,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 19667 states and 76186 transitions. [2021-06-05 16:51:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:41,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:41,402 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:41,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3580 [2021-06-05 16:51:41,603 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:41,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1640639411, now seen corresponding path program 122 times [2021-06-05 16:51:41,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:41,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313239071] [2021-06-05 16:51:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:41,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:41,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313239071] [2021-06-05 16:51:41,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313239071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:41,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797967681] [2021-06-05 16:51:41,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:41,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:41,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:41,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:41,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:41,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797967681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:41,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:41,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:51:41,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496574666] [2021-06-05 16:51:41,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:41,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:41,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:41,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:41,742 INFO L87 Difference]: Start difference. First operand 19667 states and 76186 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:42,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:42,520 INFO L93 Difference]: Finished difference Result 29160 states and 108410 transitions. [2021-06-05 16:51:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:51:42,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:42,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:42,586 INFO L225 Difference]: With dead ends: 29160 [2021-06-05 16:51:42,586 INFO L226 Difference]: Without dead ends: 29160 [2021-06-05 16:51:42,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:51:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29160 states. [2021-06-05 16:51:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29160 to 19711. [2021-06-05 16:51:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19711 states, 19710 states have (on average 3.8728564180618976) internal successors, (76334), 19710 states have internal predecessors, (76334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:43,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19711 states to 19711 states and 76334 transitions. [2021-06-05 16:51:43,223 INFO L78 Accepts]: Start accepts. Automaton has 19711 states and 76334 transitions. Word has length 28 [2021-06-05 16:51:43,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:43,223 INFO L482 AbstractCegarLoop]: Abstraction has 19711 states and 76334 transitions. [2021-06-05 16:51:43,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 19711 states and 76334 transitions. [2021-06-05 16:51:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:43,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:43,251 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:43,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3581,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:43,463 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:43,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1869413791, now seen corresponding path program 123 times [2021-06-05 16:51:43,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:43,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129558446] [2021-06-05 16:51:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:43,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:43,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129558446] [2021-06-05 16:51:43,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129558446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:43,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080262889] [2021-06-05 16:51:43,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:43,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:51:43,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:43,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:43,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:43,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080262889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:43,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:43,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:51:43,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852480141] [2021-06-05 16:51:43,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:43,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:43,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:43,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:43,608 INFO L87 Difference]: Start difference. First operand 19711 states and 76334 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:44,612 INFO L93 Difference]: Finished difference Result 30658 states and 112697 transitions. [2021-06-05 16:51:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:51:44,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:44,679 INFO L225 Difference]: With dead ends: 30658 [2021-06-05 16:51:44,679 INFO L226 Difference]: Without dead ends: 30658 [2021-06-05 16:51:44,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 563.7ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:51:44,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30658 states. [2021-06-05 16:51:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30658 to 20243. [2021-06-05 16:51:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20243 states, 20242 states have (on average 3.8518921055231696) internal successors, (77970), 20242 states have internal predecessors, (77970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20243 states to 20243 states and 77970 transitions. [2021-06-05 16:51:45,175 INFO L78 Accepts]: Start accepts. Automaton has 20243 states and 77970 transitions. Word has length 28 [2021-06-05 16:51:45,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:45,175 INFO L482 AbstractCegarLoop]: Abstraction has 20243 states and 77970 transitions. [2021-06-05 16:51:45,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 20243 states and 77970 transitions. [2021-06-05 16:51:45,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:45,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:45,207 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:45,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-06-05 16:51:45,408 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash -923294047, now seen corresponding path program 124 times [2021-06-05 16:51:45,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:45,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100201838] [2021-06-05 16:51:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:45,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:45,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100201838] [2021-06-05 16:51:45,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100201838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:45,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708385453] [2021-06-05 16:51:45,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:45,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:45,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:45,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:45,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708385453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:45,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:45,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:51:45,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077084346] [2021-06-05 16:51:45,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:51:45,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:45,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:51:45,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:51:45,559 INFO L87 Difference]: Start difference. First operand 20243 states and 77970 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:46,656 INFO L93 Difference]: Finished difference Result 29767 states and 110352 transitions. [2021-06-05 16:51:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:51:46,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:46,724 INFO L225 Difference]: With dead ends: 29767 [2021-06-05 16:51:46,724 INFO L226 Difference]: Without dead ends: 29763 [2021-06-05 16:51:46,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:51:46,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29763 states. [2021-06-05 16:51:47,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29763 to 20135. [2021-06-05 16:51:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20135 states, 20134 states have (on average 3.854773020760902) internal successors, (77612), 20134 states have internal predecessors, (77612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20135 states to 20135 states and 77612 transitions. [2021-06-05 16:51:47,222 INFO L78 Accepts]: Start accepts. Automaton has 20135 states and 77612 transitions. Word has length 28 [2021-06-05 16:51:47,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:47,222 INFO L482 AbstractCegarLoop]: Abstraction has 20135 states and 77612 transitions. [2021-06-05 16:51:47,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:47,222 INFO L276 IsEmpty]: Start isEmpty. Operand 20135 states and 77612 transitions. [2021-06-05 16:51:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:47,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:47,251 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:47,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3583,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:47,451 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:47,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:47,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1048850995, now seen corresponding path program 125 times [2021-06-05 16:51:47,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:47,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837343265] [2021-06-05 16:51:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:47,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:47,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837343265] [2021-06-05 16:51:47,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837343265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:47,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291794430] [2021-06-05 16:51:47,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:47,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:51:47,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:47,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:51:47,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:51:47,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291794430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:47,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:47,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:51:47,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238525128] [2021-06-05 16:51:47,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:51:47,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:47,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:51:47,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:51:47,571 INFO L87 Difference]: Start difference. First operand 20135 states and 77612 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:47,792 INFO L93 Difference]: Finished difference Result 25115 states and 93450 transitions. [2021-06-05 16:51:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:51:47,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:47,856 INFO L225 Difference]: With dead ends: 25115 [2021-06-05 16:51:47,857 INFO L226 Difference]: Without dead ends: 25115 [2021-06-05 16:51:47,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:51:47,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25115 states. [2021-06-05 16:51:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25115 to 20445. [2021-06-05 16:51:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20445 states, 20444 states have (on average 3.845871649383682) internal successors, (78625), 20444 states have internal predecessors, (78625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20445 states to 20445 states and 78625 transitions. [2021-06-05 16:51:48,264 INFO L78 Accepts]: Start accepts. Automaton has 20445 states and 78625 transitions. Word has length 28 [2021-06-05 16:51:48,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:48,264 INFO L482 AbstractCegarLoop]: Abstraction has 20445 states and 78625 transitions. [2021-06-05 16:51:48,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:48,264 INFO L276 IsEmpty]: Start isEmpty. Operand 20445 states and 78625 transitions. [2021-06-05 16:51:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:48,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:48,294 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:48,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3584 [2021-06-05 16:51:48,495 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:48,495 INFO L82 PathProgramCache]: Analyzing trace with hash -118651251, now seen corresponding path program 126 times [2021-06-05 16:51:48,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:48,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401885859] [2021-06-05 16:51:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:48,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:48,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401885859] [2021-06-05 16:51:48,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401885859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:48,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77534446] [2021-06-05 16:51:48,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:48,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:51:48,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:48,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:48,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:51:48,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77534446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:48,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:48,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:51:48,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289629370] [2021-06-05 16:51:48,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:48,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:48,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:48,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:48,627 INFO L87 Difference]: Start difference. First operand 20445 states and 78625 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:49,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:49,475 INFO L93 Difference]: Finished difference Result 30869 states and 113082 transitions. [2021-06-05 16:51:49,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:51:49,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:49,556 INFO L225 Difference]: With dead ends: 30869 [2021-06-05 16:51:49,556 INFO L226 Difference]: Without dead ends: 30869 [2021-06-05 16:51:49,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 457.9ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:51:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30869 states. [2021-06-05 16:51:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30869 to 22051. [2021-06-05 16:51:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22051 states, 22050 states have (on average 3.8592743764172335) internal successors, (85097), 22050 states have internal predecessors, (85097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:50,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22051 states to 22051 states and 85097 transitions. [2021-06-05 16:51:50,079 INFO L78 Accepts]: Start accepts. Automaton has 22051 states and 85097 transitions. Word has length 28 [2021-06-05 16:51:50,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:50,079 INFO L482 AbstractCegarLoop]: Abstraction has 22051 states and 85097 transitions. [2021-06-05 16:51:50,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:50,079 INFO L276 IsEmpty]: Start isEmpty. Operand 22051 states and 85097 transitions. [2021-06-05 16:51:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:50,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:50,108 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:50,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:50,309 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1808445805, now seen corresponding path program 127 times [2021-06-05 16:51:50,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:50,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590015497] [2021-06-05 16:51:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:50,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:50,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590015497] [2021-06-05 16:51:50,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590015497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:50,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165208509] [2021-06-05 16:51:50,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:50,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:50,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:51:50,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165208509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:50,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:50,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:51:50,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672566439] [2021-06-05 16:51:50,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:50,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:50,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:50,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:50,576 INFO L87 Difference]: Start difference. First operand 22051 states and 85097 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:51,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:51,288 INFO L93 Difference]: Finished difference Result 29083 states and 108458 transitions. [2021-06-05 16:51:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:51:51,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:51,355 INFO L225 Difference]: With dead ends: 29083 [2021-06-05 16:51:51,355 INFO L226 Difference]: Without dead ends: 29071 [2021-06-05 16:51:51,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 509.5ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:51:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29071 states. [2021-06-05 16:51:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29071 to 22169. [2021-06-05 16:51:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22169 states, 22168 states have (on average 3.854655359076146) internal successors, (85450), 22168 states have internal predecessors, (85450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22169 states to 22169 states and 85450 transitions. [2021-06-05 16:51:51,878 INFO L78 Accepts]: Start accepts. Automaton has 22169 states and 85450 transitions. Word has length 28 [2021-06-05 16:51:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:51,878 INFO L482 AbstractCegarLoop]: Abstraction has 22169 states and 85450 transitions. [2021-06-05 16:51:51,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 22169 states and 85450 transitions. [2021-06-05 16:51:51,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:51,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:51,911 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:52,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:52,112 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:52,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1705760401, now seen corresponding path program 128 times [2021-06-05 16:51:52,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:52,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162744082] [2021-06-05 16:51:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:52,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:52,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162744082] [2021-06-05 16:51:52,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162744082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:52,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558213911] [2021-06-05 16:51:52,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:52,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:51:52,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:52,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:51:52,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:51:52,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558213911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:52,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:52,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:51:52,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898999589] [2021-06-05 16:51:52,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:51:52,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:52,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:51:52,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:51:52,235 INFO L87 Difference]: Start difference. First operand 22169 states and 85450 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:52,483 INFO L93 Difference]: Finished difference Result 25428 states and 96407 transitions. [2021-06-05 16:51:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:51:52,483 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:52,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:52,545 INFO L225 Difference]: With dead ends: 25428 [2021-06-05 16:51:52,546 INFO L226 Difference]: Without dead ends: 25428 [2021-06-05 16:51:52,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:51:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25428 states. [2021-06-05 16:51:53,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25428 to 22972. [2021-06-05 16:51:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22972 states, 22971 states have (on average 3.84959296504288) internal successors, (88429), 22971 states have internal predecessors, (88429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22972 states to 22972 states and 88429 transitions. [2021-06-05 16:51:53,099 INFO L78 Accepts]: Start accepts. Automaton has 22972 states and 88429 transitions. Word has length 28 [2021-06-05 16:51:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:53,099 INFO L482 AbstractCegarLoop]: Abstraction has 22972 states and 88429 transitions. [2021-06-05 16:51:53,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 22972 states and 88429 transitions. [2021-06-05 16:51:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:53,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:53,133 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:53,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3587,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:53,334 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:53,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:53,334 INFO L82 PathProgramCache]: Analyzing trace with hash -2145545327, now seen corresponding path program 129 times [2021-06-05 16:51:53,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:53,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522161191] [2021-06-05 16:51:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:53,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:53,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522161191] [2021-06-05 16:51:53,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522161191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:53,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25335672] [2021-06-05 16:51:53,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:53,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:51:53,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:53,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:53,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25335672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:53,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:53,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:51:53,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119988625] [2021-06-05 16:51:53,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:51:53,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:53,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:51:53,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:51:53,510 INFO L87 Difference]: Start difference. First operand 22972 states and 88429 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:54,283 INFO L93 Difference]: Finished difference Result 30839 states and 113843 transitions. [2021-06-05 16:51:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:51:54,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:54,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:54,358 INFO L225 Difference]: With dead ends: 30839 [2021-06-05 16:51:54,358 INFO L226 Difference]: Without dead ends: 30839 [2021-06-05 16:51:54,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 462.4ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:51:54,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30839 states. [2021-06-05 16:51:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30839 to 24204. [2021-06-05 16:51:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24204 states, 24203 states have (on average 3.8153534685782753) internal successors, (92343), 24203 states have internal predecessors, (92343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24204 states to 24204 states and 92343 transitions. [2021-06-05 16:51:54,948 INFO L78 Accepts]: Start accepts. Automaton has 24204 states and 92343 transitions. Word has length 28 [2021-06-05 16:51:54,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:54,948 INFO L482 AbstractCegarLoop]: Abstraction has 24204 states and 92343 transitions. [2021-06-05 16:51:54,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 24204 states and 92343 transitions. [2021-06-05 16:51:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:54,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:54,988 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:55,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:55,189 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:55,189 INFO L82 PathProgramCache]: Analyzing trace with hash -414511489, now seen corresponding path program 130 times [2021-06-05 16:51:55,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:55,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909630030] [2021-06-05 16:51:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:55,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:55,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909630030] [2021-06-05 16:51:55,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909630030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:55,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021262683] [2021-06-05 16:51:55,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:55,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:51:55,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:55,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:55,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:55,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021262683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:55,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:55,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:51:55,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649674976] [2021-06-05 16:51:55,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:51:55,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:51:55,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:51:55,308 INFO L87 Difference]: Start difference. First operand 24204 states and 92343 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:56,001 INFO L93 Difference]: Finished difference Result 29939 states and 111457 transitions. [2021-06-05 16:51:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:51:56,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:56,077 INFO L225 Difference]: With dead ends: 29939 [2021-06-05 16:51:56,077 INFO L226 Difference]: Without dead ends: 29931 [2021-06-05 16:51:56,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 299.0ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:51:56,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29931 states. [2021-06-05 16:51:56,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29931 to 24026. [2021-06-05 16:51:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 24025 states have (on average 3.821685744016649) internal successors, (91816), 24025 states have internal predecessors, (91816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 91816 transitions. [2021-06-05 16:51:56,728 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 91816 transitions. Word has length 28 [2021-06-05 16:51:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:56,729 INFO L482 AbstractCegarLoop]: Abstraction has 24026 states and 91816 transitions. [2021-06-05 16:51:56,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 91816 transitions. [2021-06-05 16:51:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:56,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:56,778 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:56,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3589,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:56,978 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:56,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:56,979 INFO L82 PathProgramCache]: Analyzing trace with hash 44544553, now seen corresponding path program 131 times [2021-06-05 16:51:56,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:56,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61603487] [2021-06-05 16:51:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:57,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:57,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61603487] [2021-06-05 16:51:57,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61603487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:57,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153394713] [2021-06-05 16:51:57,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:57,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:51:57,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:57,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:51:57,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:57,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153394713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:57,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:57,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:51:57,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172647867] [2021-06-05 16:51:57,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:51:57,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:57,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:51:57,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:51:57,115 INFO L87 Difference]: Start difference. First operand 24026 states and 91816 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:57,870 INFO L93 Difference]: Finished difference Result 31774 states and 117062 transitions. [2021-06-05 16:51:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:51:57,870 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:57,941 INFO L225 Difference]: With dead ends: 31774 [2021-06-05 16:51:57,941 INFO L226 Difference]: Without dead ends: 31774 [2021-06-05 16:51:57,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:51:57,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31774 states. [2021-06-05 16:51:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31774 to 25062. [2021-06-05 16:51:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25062 states, 25061 states have (on average 3.796416743146722) internal successors, (95142), 25061 states have internal predecessors, (95142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25062 states to 25062 states and 95142 transitions. [2021-06-05 16:51:58,544 INFO L78 Accepts]: Start accepts. Automaton has 25062 states and 95142 transitions. Word has length 28 [2021-06-05 16:51:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:51:58,544 INFO L482 AbstractCegarLoop]: Abstraction has 25062 states and 95142 transitions. [2021-06-05 16:51:58,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 25062 states and 95142 transitions. [2021-06-05 16:51:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:51:58,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:51:58,578 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:51:58,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-06-05 16:51:58,779 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:51:58,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:51:58,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1038478103, now seen corresponding path program 132 times [2021-06-05 16:51:58,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:51:58,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499367239] [2021-06-05 16:51:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:51:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:51:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:58,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:51:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499367239] [2021-06-05 16:51:58,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499367239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613820095] [2021-06-05 16:51:58,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:51:58,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:51:58,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:51:58,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:51:58,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:51:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:51:58,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613820095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:51:58,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:51:58,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:51:58,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948872769] [2021-06-05 16:51:58,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:51:58,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:51:58,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:51:58,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:51:58,909 INFO L87 Difference]: Start difference. First operand 25062 states and 95142 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:51:59,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:51:59,338 INFO L93 Difference]: Finished difference Result 30731 states and 115778 transitions. [2021-06-05 16:51:59,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:51:59,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:51:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:51:59,415 INFO L225 Difference]: With dead ends: 30731 [2021-06-05 16:51:59,415 INFO L226 Difference]: Without dead ends: 30718 [2021-06-05 16:51:59,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:51:59,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30718 states. [2021-06-05 16:51:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30718 to 29185. [2021-06-05 16:51:59,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29185 states, 29184 states have (on average 3.8150356359649122) internal successors, (111338), 29184 states have internal predecessors, (111338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29185 states to 29185 states and 111338 transitions. [2021-06-05 16:52:00,019 INFO L78 Accepts]: Start accepts. Automaton has 29185 states and 111338 transitions. Word has length 28 [2021-06-05 16:52:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:00,019 INFO L482 AbstractCegarLoop]: Abstraction has 29185 states and 111338 transitions. [2021-06-05 16:52:00,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29185 states and 111338 transitions. [2021-06-05 16:52:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:00,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:00,067 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:00,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3591,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:00,268 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash 432600015, now seen corresponding path program 133 times [2021-06-05 16:52:00,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:00,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778776037] [2021-06-05 16:52:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:00,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:00,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778776037] [2021-06-05 16:52:00,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778776037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:00,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82407647] [2021-06-05 16:52:00,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:00,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:52:00,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:00,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82407647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:00,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:00,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:52:00,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904848231] [2021-06-05 16:52:00,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:52:00,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:00,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:52:00,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:52:00,381 INFO L87 Difference]: Start difference. First operand 29185 states and 111338 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:00,825 INFO L93 Difference]: Finished difference Result 32194 states and 120690 transitions. [2021-06-05 16:52:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:52:00,826 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:00,895 INFO L225 Difference]: With dead ends: 32194 [2021-06-05 16:52:00,896 INFO L226 Difference]: Without dead ends: 32194 [2021-06-05 16:52:00,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 139.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:52:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32194 states. [2021-06-05 16:52:01,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32194 to 28930. [2021-06-05 16:52:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28930 states, 28929 states have (on average 3.8113657575443325) internal successors, (110259), 28929 states have internal predecessors, (110259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28930 states to 28930 states and 110259 transitions. [2021-06-05 16:52:01,491 INFO L78 Accepts]: Start accepts. Automaton has 28930 states and 110259 transitions. Word has length 28 [2021-06-05 16:52:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:01,491 INFO L482 AbstractCegarLoop]: Abstraction has 28930 states and 110259 transitions. [2021-06-05 16:52:01,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 28930 states and 110259 transitions. [2021-06-05 16:52:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:01,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:01,543 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:01,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3592 [2021-06-05 16:52:01,743 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:01,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:01,744 INFO L82 PathProgramCache]: Analyzing trace with hash 990664297, now seen corresponding path program 134 times [2021-06-05 16:52:01,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:01,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326627657] [2021-06-05 16:52:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:01,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:01,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326627657] [2021-06-05 16:52:01,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326627657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:01,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228177079] [2021-06-05 16:52:01,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:01,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:01,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:01,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:01,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:01,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228177079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:01,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:01,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:52:01,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943459068] [2021-06-05 16:52:01,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:52:01,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:01,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:52:01,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:52:01,860 INFO L87 Difference]: Start difference. First operand 28930 states and 110259 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:02,470 INFO L93 Difference]: Finished difference Result 35356 states and 131587 transitions. [2021-06-05 16:52:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:52:02,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:02,556 INFO L225 Difference]: With dead ends: 35356 [2021-06-05 16:52:02,556 INFO L226 Difference]: Without dead ends: 35348 [2021-06-05 16:52:02,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:52:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35348 states. [2021-06-05 16:52:03,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35348 to 28896. [2021-06-05 16:52:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28896 states, 28895 states have (on average 3.8118013497144836) internal successors, (110142), 28895 states have internal predecessors, (110142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28896 states to 28896 states and 110142 transitions. [2021-06-05 16:52:03,197 INFO L78 Accepts]: Start accepts. Automaton has 28896 states and 110142 transitions. Word has length 28 [2021-06-05 16:52:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:03,197 INFO L482 AbstractCegarLoop]: Abstraction has 28896 states and 110142 transitions. [2021-06-05 16:52:03,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 28896 states and 110142 transitions. [2021-06-05 16:52:03,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:03,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:03,251 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:03,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3593,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:03,453 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:03,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:03,453 INFO L82 PathProgramCache]: Analyzing trace with hash -896097405, now seen corresponding path program 135 times [2021-06-05 16:52:03,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:03,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691258694] [2021-06-05 16:52:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:03,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:03,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691258694] [2021-06-05 16:52:03,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691258694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:03,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026485768] [2021-06-05 16:52:03,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:03,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:52:03,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:03,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:52:03,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:03,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026485768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:03,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:03,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:52:03,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062497621] [2021-06-05 16:52:03,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:52:03,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:03,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:52:03,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:52:03,573 INFO L87 Difference]: Start difference. First operand 28896 states and 110142 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:03,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:03,975 INFO L93 Difference]: Finished difference Result 31746 states and 119616 transitions. [2021-06-05 16:52:03,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:52:03,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:04,047 INFO L225 Difference]: With dead ends: 31746 [2021-06-05 16:52:04,047 INFO L226 Difference]: Without dead ends: 31746 [2021-06-05 16:52:04,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:52:04,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31746 states. [2021-06-05 16:52:04,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31746 to 29428. [2021-06-05 16:52:04,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29428 states, 29427 states have (on average 3.81031025928569) internal successors, (112126), 29427 states have internal predecessors, (112126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29428 states to 29428 states and 112126 transitions. [2021-06-05 16:52:04,882 INFO L78 Accepts]: Start accepts. Automaton has 29428 states and 112126 transitions. Word has length 28 [2021-06-05 16:52:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:04,882 INFO L482 AbstractCegarLoop]: Abstraction has 29428 states and 112126 transitions. [2021-06-05 16:52:04,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 29428 states and 112126 transitions. [2021-06-05 16:52:04,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:04,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:04,930 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:05,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3594 [2021-06-05 16:52:05,130 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:05,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:05,131 INFO L82 PathProgramCache]: Analyzing trace with hash 68962157, now seen corresponding path program 136 times [2021-06-05 16:52:05,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:05,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829778546] [2021-06-05 16:52:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:05,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:05,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829778546] [2021-06-05 16:52:05,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829778546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:05,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269113291] [2021-06-05 16:52:05,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:05,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:05,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:05,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:05,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:05,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269113291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:05,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:05,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:52:05,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202724519] [2021-06-05 16:52:05,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:52:05,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:05,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:52:05,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:52:05,248 INFO L87 Difference]: Start difference. First operand 29428 states and 112126 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:05,848 INFO L93 Difference]: Finished difference Result 36274 states and 134973 transitions. [2021-06-05 16:52:05,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:52:05,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:05,930 INFO L225 Difference]: With dead ends: 36274 [2021-06-05 16:52:05,930 INFO L226 Difference]: Without dead ends: 36250 [2021-06-05 16:52:05,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:52:05,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36250 states. [2021-06-05 16:52:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36250 to 29600. [2021-06-05 16:52:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29600 states, 29599 states have (on average 3.8062096692455825) internal successors, (112660), 29599 states have internal predecessors, (112660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29600 states to 29600 states and 112660 transitions. [2021-06-05 16:52:06,806 INFO L78 Accepts]: Start accepts. Automaton has 29600 states and 112660 transitions. Word has length 28 [2021-06-05 16:52:06,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:06,806 INFO L482 AbstractCegarLoop]: Abstraction has 29600 states and 112660 transitions. [2021-06-05 16:52:06,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:06,806 INFO L276 IsEmpty]: Start isEmpty. Operand 29600 states and 112660 transitions. [2021-06-05 16:52:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:06,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:06,862 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:07,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-05 16:52:07,062 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1253949625, now seen corresponding path program 137 times [2021-06-05 16:52:07,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:07,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029805529] [2021-06-05 16:52:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:07,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:07,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029805529] [2021-06-05 16:52:07,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029805529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:07,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712949599] [2021-06-05 16:52:07,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:07,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:52:07,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:07,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:52:07,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:07,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712949599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:07,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:07,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 16:52:07,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488280391] [2021-06-05 16:52:07,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:52:07,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:07,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:52:07,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:52:07,352 INFO L87 Difference]: Start difference. First operand 29600 states and 112660 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:07,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:07,906 INFO L93 Difference]: Finished difference Result 32160 states and 121084 transitions. [2021-06-05 16:52:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:52:07,908 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:07,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:07,981 INFO L225 Difference]: With dead ends: 32160 [2021-06-05 16:52:07,982 INFO L226 Difference]: Without dead ends: 32160 [2021-06-05 16:52:07,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:52:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32160 states. [2021-06-05 16:52:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32160 to 29526. [2021-06-05 16:52:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29526 states, 29525 states have (on average 3.807078746824725) internal successors, (112404), 29525 states have internal predecessors, (112404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29526 states to 29526 states and 112404 transitions. [2021-06-05 16:52:08,805 INFO L78 Accepts]: Start accepts. Automaton has 29526 states and 112404 transitions. Word has length 28 [2021-06-05 16:52:08,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:08,805 INFO L482 AbstractCegarLoop]: Abstraction has 29526 states and 112404 transitions. [2021-06-05 16:52:08,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 29526 states and 112404 transitions. [2021-06-05 16:52:08,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:08,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:08,862 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:09,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3596,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:09,083 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:09,084 INFO L82 PathProgramCache]: Analyzing trace with hash -719397267, now seen corresponding path program 138 times [2021-06-05 16:52:09,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:09,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293393791] [2021-06-05 16:52:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:09,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:09,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293393791] [2021-06-05 16:52:09,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293393791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:09,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236490558] [2021-06-05 16:52:09,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:09,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:52:09,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:09,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:09,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:09,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236490558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:09,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:09,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:52:09,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852872946] [2021-06-05 16:52:09,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:52:09,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:09,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:52:09,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:52:09,254 INFO L87 Difference]: Start difference. First operand 29526 states and 112404 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:09,498 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 16:52:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:10,627 INFO L93 Difference]: Finished difference Result 36197 states and 134714 transitions. [2021-06-05 16:52:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:52:10,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:10,761 INFO L225 Difference]: With dead ends: 36197 [2021-06-05 16:52:10,762 INFO L226 Difference]: Without dead ends: 36157 [2021-06-05 16:52:10,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 691.0ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:52:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36157 states. [2021-06-05 16:52:11,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36157 to 29682. [2021-06-05 16:52:11,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29682 states, 29681 states have (on average 3.8031737475152454) internal successors, (112882), 29681 states have internal predecessors, (112882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29682 states to 29682 states and 112882 transitions. [2021-06-05 16:52:11,548 INFO L78 Accepts]: Start accepts. Automaton has 29682 states and 112882 transitions. Word has length 28 [2021-06-05 16:52:11,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:11,548 INFO L482 AbstractCegarLoop]: Abstraction has 29682 states and 112882 transitions. [2021-06-05 16:52:11,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 29682 states and 112882 transitions. [2021-06-05 16:52:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:11,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:11,597 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:11,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3597 [2021-06-05 16:52:11,798 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:11,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:11,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1643440553, now seen corresponding path program 139 times [2021-06-05 16:52:11,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:11,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179687249] [2021-06-05 16:52:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:11,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:11,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179687249] [2021-06-05 16:52:11,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179687249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:11,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145380645] [2021-06-05 16:52:11,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:12,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145380645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:12,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:12,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:52:12,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840091385] [2021-06-05 16:52:12,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:12,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:12,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:12,010 INFO L87 Difference]: Start difference. First operand 29682 states and 112882 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:14,317 INFO L93 Difference]: Finished difference Result 67954 states and 250170 transitions. [2021-06-05 16:52:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:52:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:14,795 INFO L225 Difference]: With dead ends: 67954 [2021-06-05 16:52:14,796 INFO L226 Difference]: Without dead ends: 67954 [2021-06-05 16:52:14,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1198.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:52:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67954 states. [2021-06-05 16:52:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67954 to 37388. [2021-06-05 16:52:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37388 states, 37387 states have (on average 3.884772781983042) internal successors, (145240), 37387 states have internal predecessors, (145240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37388 states to 37388 states and 145240 transitions. [2021-06-05 16:52:16,735 INFO L78 Accepts]: Start accepts. Automaton has 37388 states and 145240 transitions. Word has length 28 [2021-06-05 16:52:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:16,736 INFO L482 AbstractCegarLoop]: Abstraction has 37388 states and 145240 transitions. [2021-06-05 16:52:16,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 37388 states and 145240 transitions. [2021-06-05 16:52:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:16,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:16,821 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:17,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:17,042 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:17,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:17,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1122622099, now seen corresponding path program 140 times [2021-06-05 16:52:17,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:17,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205733643] [2021-06-05 16:52:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:17,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:17,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205733643] [2021-06-05 16:52:17,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205733643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:17,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508581223] [2021-06-05 16:52:17,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:17,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:17,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:17,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:17,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:17,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508581223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:17,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:17,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:52:17,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986500202] [2021-06-05 16:52:17,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:17,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:17,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:17,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:17,253 INFO L87 Difference]: Start difference. First operand 37388 states and 145240 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:18,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:18,960 INFO L93 Difference]: Finished difference Result 67327 states and 248511 transitions. [2021-06-05 16:52:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:52:18,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:19,155 INFO L225 Difference]: With dead ends: 67327 [2021-06-05 16:52:19,155 INFO L226 Difference]: Without dead ends: 67327 [2021-06-05 16:52:19,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 728.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:52:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67327 states. [2021-06-05 16:52:20,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67327 to 37385. [2021-06-05 16:52:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37385 states, 37384 states have (on average 3.8847100363791998) internal successors, (145226), 37384 states have internal predecessors, (145226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 145226 transitions. [2021-06-05 16:52:20,610 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 145226 transitions. Word has length 28 [2021-06-05 16:52:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:20,610 INFO L482 AbstractCegarLoop]: Abstraction has 37385 states and 145226 transitions. [2021-06-05 16:52:20,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 145226 transitions. [2021-06-05 16:52:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:20,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:20,675 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:20,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3599,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:20,876 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:20,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1038046775, now seen corresponding path program 141 times [2021-06-05 16:52:20,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:20,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923565630] [2021-06-05 16:52:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:20,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:20,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923565630] [2021-06-05 16:52:20,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923565630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:20,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341381798] [2021-06-05 16:52:20,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:20,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:52:20,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:20,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:20,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:21,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341381798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:21,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:21,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:52:21,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551864866] [2021-06-05 16:52:21,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:21,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:21,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:21,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:21,046 INFO L87 Difference]: Start difference. First operand 37385 states and 145226 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:22,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:22,504 INFO L93 Difference]: Finished difference Result 62746 states and 233002 transitions. [2021-06-05 16:52:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:52:22,505 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:22,667 INFO L225 Difference]: With dead ends: 62746 [2021-06-05 16:52:22,667 INFO L226 Difference]: Without dead ends: 62746 [2021-06-05 16:52:22,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 649.6ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:52:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62746 states. [2021-06-05 16:52:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62746 to 37407. [2021-06-05 16:52:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37407 states, 37406 states have (on average 3.8850184462385715) internal successors, (145323), 37406 states have internal predecessors, (145323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37407 states to 37407 states and 145323 transitions. [2021-06-05 16:52:24,120 INFO L78 Accepts]: Start accepts. Automaton has 37407 states and 145323 transitions. Word has length 28 [2021-06-05 16:52:24,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:24,120 INFO L482 AbstractCegarLoop]: Abstraction has 37407 states and 145323 transitions. [2021-06-05 16:52:24,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 37407 states and 145323 transitions. [2021-06-05 16:52:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:24,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:24,173 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:24,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:24,373 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:24,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2110363749, now seen corresponding path program 142 times [2021-06-05 16:52:24,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:24,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330871170] [2021-06-05 16:52:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:24,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:24,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330871170] [2021-06-05 16:52:24,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330871170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:24,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189439802] [2021-06-05 16:52:24,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:24,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:24,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:24,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:24,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:24,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189439802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:24,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:24,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:52:24,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465572986] [2021-06-05 16:52:24,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:24,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:24,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:24,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:24,518 INFO L87 Difference]: Start difference. First operand 37407 states and 145323 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:25,825 INFO L93 Difference]: Finished difference Result 61875 states and 230752 transitions. [2021-06-05 16:52:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:52:25,825 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:25,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:26,018 INFO L225 Difference]: With dead ends: 61875 [2021-06-05 16:52:26,019 INFO L226 Difference]: Without dead ends: 61867 [2021-06-05 16:52:26,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 510.1ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:52:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61867 states. [2021-06-05 16:52:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61867 to 37407. [2021-06-05 16:52:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37407 states, 37406 states have (on average 3.8848580441640377) internal successors, (145317), 37406 states have internal predecessors, (145317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37407 states to 37407 states and 145317 transitions. [2021-06-05 16:52:27,360 INFO L78 Accepts]: Start accepts. Automaton has 37407 states and 145317 transitions. Word has length 28 [2021-06-05 16:52:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:27,360 INFO L482 AbstractCegarLoop]: Abstraction has 37407 states and 145317 transitions. [2021-06-05 16:52:27,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 37407 states and 145317 transitions. [2021-06-05 16:52:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:27,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:27,425 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:27,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3601,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:27,626 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:27,626 INFO L82 PathProgramCache]: Analyzing trace with hash 104546025, now seen corresponding path program 143 times [2021-06-05 16:52:27,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:27,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999195287] [2021-06-05 16:52:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:27,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:27,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999195287] [2021-06-05 16:52:27,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999195287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:27,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653914254] [2021-06-05 16:52:27,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:27,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:52:27,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:27,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:27,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653914254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:27,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:27,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:52:27,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212404645] [2021-06-05 16:52:27,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:27,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:27,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:27,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:27,787 INFO L87 Difference]: Start difference. First operand 37407 states and 145317 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:29,213 INFO L93 Difference]: Finished difference Result 61558 states and 229893 transitions. [2021-06-05 16:52:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:52:29,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:29,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:29,378 INFO L225 Difference]: With dead ends: 61558 [2021-06-05 16:52:29,378 INFO L226 Difference]: Without dead ends: 61558 [2021-06-05 16:52:29,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 609.5ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:52:29,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61558 states. [2021-06-05 16:52:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61558 to 37415. [2021-06-05 16:52:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37415 states, 37414 states have (on average 3.8849361201689208) internal successors, (145351), 37414 states have internal predecessors, (145351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:30,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37415 states to 37415 states and 145351 transitions. [2021-06-05 16:52:30,794 INFO L78 Accepts]: Start accepts. Automaton has 37415 states and 145351 transitions. Word has length 28 [2021-06-05 16:52:30,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:30,794 INFO L482 AbstractCegarLoop]: Abstraction has 37415 states and 145351 transitions. [2021-06-05 16:52:30,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:30,794 INFO L276 IsEmpty]: Start isEmpty. Operand 37415 states and 145351 transitions. [2021-06-05 16:52:30,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:30,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:30,859 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:31,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3602 [2021-06-05 16:52:31,059 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:31,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:31,060 INFO L82 PathProgramCache]: Analyzing trace with hash -950831369, now seen corresponding path program 144 times [2021-06-05 16:52:31,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:31,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933736794] [2021-06-05 16:52:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:31,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:31,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933736794] [2021-06-05 16:52:31,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933736794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:31,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605357554] [2021-06-05 16:52:31,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:31,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:52:31,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:31,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:31,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:31,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605357554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:31,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:31,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:52:31,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054060739] [2021-06-05 16:52:31,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:31,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:31,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:31,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:31,227 INFO L87 Difference]: Start difference. First operand 37415 states and 145351 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:32,726 INFO L93 Difference]: Finished difference Result 61347 states and 229367 transitions. [2021-06-05 16:52:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:52:32,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:32,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:32,894 INFO L225 Difference]: With dead ends: 61347 [2021-06-05 16:52:32,894 INFO L226 Difference]: Without dead ends: 61339 [2021-06-05 16:52:32,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 552.8ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:52:32,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61339 states. [2021-06-05 16:52:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61339 to 37415. [2021-06-05 16:52:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37415 states, 37414 states have (on average 3.884882664243331) internal successors, (145349), 37414 states have internal predecessors, (145349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37415 states to 37415 states and 145349 transitions. [2021-06-05 16:52:34,132 INFO L78 Accepts]: Start accepts. Automaton has 37415 states and 145349 transitions. Word has length 28 [2021-06-05 16:52:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:34,132 INFO L482 AbstractCegarLoop]: Abstraction has 37415 states and 145349 transitions. [2021-06-05 16:52:34,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 37415 states and 145349 transitions. [2021-06-05 16:52:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:34,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:34,193 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:34,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3603,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:34,394 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash 401579921, now seen corresponding path program 145 times [2021-06-05 16:52:34,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:34,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237043384] [2021-06-05 16:52:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:34,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:34,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237043384] [2021-06-05 16:52:34,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237043384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:34,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054709154] [2021-06-05 16:52:34,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:34,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:34,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:34,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054709154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:34,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:34,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:52:34,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448597041] [2021-06-05 16:52:34,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:52:34,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:34,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:52:34,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:52:34,561 INFO L87 Difference]: Start difference. First operand 37415 states and 145349 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:35,570 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 16:52:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:35,990 INFO L93 Difference]: Finished difference Result 60787 states and 225952 transitions. [2021-06-05 16:52:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:52:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:35,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:36,161 INFO L225 Difference]: With dead ends: 60787 [2021-06-05 16:52:36,162 INFO L226 Difference]: Without dead ends: 60787 [2021-06-05 16:52:36,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 888.5ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:52:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60787 states. [2021-06-05 16:52:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60787 to 40214. [2021-06-05 16:52:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40214 states, 40213 states have (on average 3.8890159898540273) internal successors, (156389), 40213 states have internal predecessors, (156389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40214 states to 40214 states and 156389 transitions. [2021-06-05 16:52:37,761 INFO L78 Accepts]: Start accepts. Automaton has 40214 states and 156389 transitions. Word has length 28 [2021-06-05 16:52:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:37,761 INFO L482 AbstractCegarLoop]: Abstraction has 40214 states and 156389 transitions. [2021-06-05 16:52:37,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 40214 states and 156389 transitions. [2021-06-05 16:52:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:37,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:37,846 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:38,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3604 [2021-06-05 16:52:38,046 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:38,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1473896895, now seen corresponding path program 146 times [2021-06-05 16:52:38,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:38,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321060533] [2021-06-05 16:52:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:38,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:38,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321060533] [2021-06-05 16:52:38,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321060533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:38,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21163195] [2021-06-05 16:52:38,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:38,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:38,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:38,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:38,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21163195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:38,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:38,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:52:38,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813851729] [2021-06-05 16:52:38,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:52:38,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:38,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:52:38,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:52:38,449 INFO L87 Difference]: Start difference. First operand 40214 states and 156389 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:39,478 INFO L93 Difference]: Finished difference Result 60310 states and 224694 transitions. [2021-06-05 16:52:39,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:52:39,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:39,644 INFO L225 Difference]: With dead ends: 60310 [2021-06-05 16:52:39,645 INFO L226 Difference]: Without dead ends: 60302 [2021-06-05 16:52:39,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 763.3ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:52:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60302 states. [2021-06-05 16:52:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60302 to 39928. [2021-06-05 16:52:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39928 states, 39927 states have (on average 3.8946577503944697) internal successors, (155502), 39927 states have internal predecessors, (155502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39928 states to 39928 states and 155502 transitions. [2021-06-05 16:52:41,141 INFO L78 Accepts]: Start accepts. Automaton has 39928 states and 155502 transitions. Word has length 28 [2021-06-05 16:52:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:41,141 INFO L482 AbstractCegarLoop]: Abstraction has 39928 states and 155502 transitions. [2021-06-05 16:52:41,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 39928 states and 155502 transitions. [2021-06-05 16:52:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:41,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:41,206 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:41,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3605,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:41,406 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:41,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1560233875, now seen corresponding path program 147 times [2021-06-05 16:52:41,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:41,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323027070] [2021-06-05 16:52:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:41,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:41,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323027070] [2021-06-05 16:52:41,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323027070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:41,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378448019] [2021-06-05 16:52:41,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:41,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:52:41,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:41,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:41,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:41,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378448019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:41,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:41,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:52:41,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737053964] [2021-06-05 16:52:41,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:52:41,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:41,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:52:41,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:52:41,546 INFO L87 Difference]: Start difference. First operand 39928 states and 155502 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:42,405 INFO L93 Difference]: Finished difference Result 58857 states and 220695 transitions. [2021-06-05 16:52:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:52:42,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:42,558 INFO L225 Difference]: With dead ends: 58857 [2021-06-05 16:52:42,559 INFO L226 Difference]: Without dead ends: 58833 [2021-06-05 16:52:42,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:52:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58833 states. [2021-06-05 16:52:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58833 to 39834. [2021-06-05 16:52:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39834 states, 39833 states have (on average 3.894635101548967) internal successors, (155135), 39833 states have internal predecessors, (155135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:44,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39834 states to 39834 states and 155135 transitions. [2021-06-05 16:52:44,238 INFO L78 Accepts]: Start accepts. Automaton has 39834 states and 155135 transitions. Word has length 28 [2021-06-05 16:52:44,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:44,238 INFO L482 AbstractCegarLoop]: Abstraction has 39834 states and 155135 transitions. [2021-06-05 16:52:44,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:44,238 INFO L276 IsEmpty]: Start isEmpty. Operand 39834 states and 155135 transitions. [2021-06-05 16:52:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:44,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:44,300 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:44,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3606,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:44,500 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:44,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:44,501 INFO L82 PathProgramCache]: Analyzing trace with hash -887947539, now seen corresponding path program 148 times [2021-06-05 16:52:44,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:44,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064706420] [2021-06-05 16:52:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:44,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:44,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064706420] [2021-06-05 16:52:44,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064706420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:44,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270436012] [2021-06-05 16:52:44,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:44,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:52:44,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:44,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:44,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:44,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270436012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:44,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:44,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:52:44,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010019903] [2021-06-05 16:52:44,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:44,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:44,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:44,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:44,668 INFO L87 Difference]: Start difference. First operand 39834 states and 155135 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:45,837 INFO L93 Difference]: Finished difference Result 60084 states and 224060 transitions. [2021-06-05 16:52:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:52:45,837 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:46,263 INFO L225 Difference]: With dead ends: 60084 [2021-06-05 16:52:46,263 INFO L226 Difference]: Without dead ends: 60084 [2021-06-05 16:52:46,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 622.4ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:52:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60084 states. [2021-06-05 16:52:47,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60084 to 39930. [2021-06-05 16:52:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39930 states, 39929 states have (on average 3.8931353151844523) internal successors, (155449), 39929 states have internal predecessors, (155449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:47,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39930 states to 39930 states and 155449 transitions. [2021-06-05 16:52:47,492 INFO L78 Accepts]: Start accepts. Automaton has 39930 states and 155449 transitions. Word has length 28 [2021-06-05 16:52:47,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:47,493 INFO L482 AbstractCegarLoop]: Abstraction has 39930 states and 155449 transitions. [2021-06-05 16:52:47,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:47,493 INFO L276 IsEmpty]: Start isEmpty. Operand 39930 states and 155449 transitions. [2021-06-05 16:52:47,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:47,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:47,561 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:47,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3607 [2021-06-05 16:52:47,761 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:47,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1943324933, now seen corresponding path program 149 times [2021-06-05 16:52:47,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:47,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278642163] [2021-06-05 16:52:47,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:47,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:47,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278642163] [2021-06-05 16:52:47,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278642163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:47,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542168856] [2021-06-05 16:52:47,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:47,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:52:47,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:47,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:47,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:47,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542168856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:47,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:47,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:52:47,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109847863] [2021-06-05 16:52:47,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:52:47,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:47,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:52:47,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:52:47,922 INFO L87 Difference]: Start difference. First operand 39930 states and 155449 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:48,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:48,935 INFO L93 Difference]: Finished difference Result 59771 states and 223172 transitions. [2021-06-05 16:52:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:52:48,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:48,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:49,426 INFO L225 Difference]: With dead ends: 59771 [2021-06-05 16:52:49,426 INFO L226 Difference]: Without dead ends: 59763 [2021-06-05 16:52:49,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 512.8ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:52:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59763 states. [2021-06-05 16:52:50,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59763 to 39858. [2021-06-05 16:52:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39858 states, 39857 states have (on average 3.894598188523973) internal successors, (155227), 39857 states have internal predecessors, (155227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39858 states to 39858 states and 155227 transitions. [2021-06-05 16:52:50,909 INFO L78 Accepts]: Start accepts. Automaton has 39858 states and 155227 transitions. Word has length 28 [2021-06-05 16:52:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:50,909 INFO L482 AbstractCegarLoop]: Abstraction has 39858 states and 155227 transitions. [2021-06-05 16:52:50,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 39858 states and 155227 transitions. [2021-06-05 16:52:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:50,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:50,979 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:51,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-06-05 16:52:51,185 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:51,185 INFO L82 PathProgramCache]: Analyzing trace with hash -460189995, now seen corresponding path program 150 times [2021-06-05 16:52:51,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:51,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963688189] [2021-06-05 16:52:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:52:51,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:51,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963688189] [2021-06-05 16:52:51,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963688189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:51,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576307342] [2021-06-05 16:52:51,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:51,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:52:51,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:51,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:51,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:51,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576307342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:51,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:51,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:52:51,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435480116] [2021-06-05 16:52:51,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:52:51,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:51,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:52:51,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:52:51,334 INFO L87 Difference]: Start difference. First operand 39858 states and 155227 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:52,191 INFO L93 Difference]: Finished difference Result 58502 states and 219661 transitions. [2021-06-05 16:52:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:52:52,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:52,347 INFO L225 Difference]: With dead ends: 58502 [2021-06-05 16:52:52,347 INFO L226 Difference]: Without dead ends: 58478 [2021-06-05 16:52:52,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 373.4ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:52:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58478 states. [2021-06-05 16:52:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58478 to 39834. [2021-06-05 16:52:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39834 states, 39833 states have (on average 3.8947355207993373) internal successors, (155139), 39833 states have internal predecessors, (155139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39834 states to 39834 states and 155139 transitions. [2021-06-05 16:52:54,038 INFO L78 Accepts]: Start accepts. Automaton has 39834 states and 155139 transitions. Word has length 28 [2021-06-05 16:52:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:54,038 INFO L482 AbstractCegarLoop]: Abstraction has 39834 states and 155139 transitions. [2021-06-05 16:52:54,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 39834 states and 155139 transitions. [2021-06-05 16:52:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:54,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:54,103 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:54,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-06-05 16:52:54,303 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:54,304 INFO L82 PathProgramCache]: Analyzing trace with hash 117906837, now seen corresponding path program 151 times [2021-06-05 16:52:54,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:54,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506405903] [2021-06-05 16:52:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:54,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:54,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506405903] [2021-06-05 16:52:54,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506405903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:54,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707549480] [2021-06-05 16:52:54,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:54,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:54,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:54,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707549480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:54,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:54,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:52:54,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878490620] [2021-06-05 16:52:54,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:52:54,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:54,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:52:54,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:52:54,444 INFO L87 Difference]: Start difference. First operand 39834 states and 155139 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:56,255 INFO L93 Difference]: Finished difference Result 61684 states and 228711 transitions. [2021-06-05 16:52:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 16:52:56,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:52:56,431 INFO L225 Difference]: With dead ends: 61684 [2021-06-05 16:52:56,432 INFO L226 Difference]: Without dead ends: 61684 [2021-06-05 16:52:56,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 881.0ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 16:52:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61684 states. [2021-06-05 16:52:57,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61684 to 44178. [2021-06-05 16:52:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44178 states, 44177 states have (on average 3.844376032777237) internal successors, (169833), 44177 states have internal predecessors, (169833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:57,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44178 states to 44178 states and 169833 transitions. [2021-06-05 16:52:57,889 INFO L78 Accepts]: Start accepts. Automaton has 44178 states and 169833 transitions. Word has length 28 [2021-06-05 16:52:57,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:52:57,889 INFO L482 AbstractCegarLoop]: Abstraction has 44178 states and 169833 transitions. [2021-06-05 16:52:57,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 44178 states and 169833 transitions. [2021-06-05 16:52:57,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:52:57,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:52:57,959 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:52:58,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:58,160 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:52:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:52:58,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1190223811, now seen corresponding path program 152 times [2021-06-05 16:52:58,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:52:58,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126700481] [2021-06-05 16:52:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:52:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:52:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:58,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:52:58,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126700481] [2021-06-05 16:52:58,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126700481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:58,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171639004] [2021-06-05 16:52:58,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:52:58,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:52:58,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:52:58,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:52:58,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:52:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:52:58,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171639004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:52:58,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:52:58,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:52:58,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619228631] [2021-06-05 16:52:58,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:52:58,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:52:58,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:52:58,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:52:58,317 INFO L87 Difference]: Start difference. First operand 44178 states and 169833 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:52:59,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:52:59,919 INFO L93 Difference]: Finished difference Result 60908 states and 226590 transitions. [2021-06-05 16:52:59,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:52:59,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:52:59,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:00,092 INFO L225 Difference]: With dead ends: 60908 [2021-06-05 16:53:00,092 INFO L226 Difference]: Without dead ends: 60900 [2021-06-05 16:53:00,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 701.5ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:53:00,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60900 states. [2021-06-05 16:53:01,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60900 to 43034. [2021-06-05 16:53:01,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43034 states, 43033 states have (on average 3.86408105407478) internal successors, (166283), 43033 states have internal predecessors, (166283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43034 states to 43034 states and 166283 transitions. [2021-06-05 16:53:01,489 INFO L78 Accepts]: Start accepts. Automaton has 43034 states and 166283 transitions. Word has length 28 [2021-06-05 16:53:01,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:01,489 INFO L482 AbstractCegarLoop]: Abstraction has 43034 states and 166283 transitions. [2021-06-05 16:53:01,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 43034 states and 166283 transitions. [2021-06-05 16:53:01,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:01,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:01,554 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:01,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3611 [2021-06-05 16:53:01,755 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:01,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1843906959, now seen corresponding path program 153 times [2021-06-05 16:53:01,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:01,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605281530] [2021-06-05 16:53:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:01,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:01,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605281530] [2021-06-05 16:53:01,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605281530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:01,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576242213] [2021-06-05 16:53:01,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:01,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:53:01,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:01,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:01,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576242213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:01,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:01,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:53:01,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133101553] [2021-06-05 16:53:01,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:01,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:01,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:01,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:01,890 INFO L87 Difference]: Start difference. First operand 43034 states and 166283 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:03,344 INFO L93 Difference]: Finished difference Result 59247 states and 221971 transitions. [2021-06-05 16:53:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:53:03,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:03,553 INFO L225 Difference]: With dead ends: 59247 [2021-06-05 16:53:03,553 INFO L226 Difference]: Without dead ends: 59223 [2021-06-05 16:53:03,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 611.9ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:53:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59223 states. [2021-06-05 16:53:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59223 to 43046. [2021-06-05 16:53:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43046 states, 43045 states have (on average 3.8619351841096528) internal successors, (166237), 43045 states have internal predecessors, (166237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43046 states to 43046 states and 166237 transitions. [2021-06-05 16:53:05,057 INFO L78 Accepts]: Start accepts. Automaton has 43046 states and 166237 transitions. Word has length 28 [2021-06-05 16:53:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:05,057 INFO L482 AbstractCegarLoop]: Abstraction has 43046 states and 166237 transitions. [2021-06-05 16:53:05,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 43046 states and 166237 transitions. [2021-06-05 16:53:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:05,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:05,123 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:05,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3612,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:05,323 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:05,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:05,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1653229165, now seen corresponding path program 154 times [2021-06-05 16:53:05,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:05,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979122899] [2021-06-05 16:53:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:05,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:05,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979122899] [2021-06-05 16:53:05,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979122899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:05,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771361325] [2021-06-05 16:53:05,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:05,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:05,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:05,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:05,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:05,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771361325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:05,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:05,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:53:05,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077464004] [2021-06-05 16:53:05,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:53:05,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:05,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:53:05,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:53:05,462 INFO L87 Difference]: Start difference. First operand 43046 states and 166237 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:06,820 INFO L93 Difference]: Finished difference Result 60535 states and 225583 transitions. [2021-06-05 16:53:06,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:53:06,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:06,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:06,982 INFO L225 Difference]: With dead ends: 60535 [2021-06-05 16:53:06,982 INFO L226 Difference]: Without dead ends: 60495 [2021-06-05 16:53:06,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 554.2ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:53:07,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60495 states. [2021-06-05 16:53:08,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60495 to 43178. [2021-06-05 16:53:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43178 states, 43177 states have (on average 3.861245570558399) internal successors, (166717), 43177 states have internal predecessors, (166717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:08,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43178 states to 43178 states and 166717 transitions. [2021-06-05 16:53:08,393 INFO L78 Accepts]: Start accepts. Automaton has 43178 states and 166717 transitions. Word has length 28 [2021-06-05 16:53:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:08,394 INFO L482 AbstractCegarLoop]: Abstraction has 43178 states and 166717 transitions. [2021-06-05 16:53:08,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 43178 states and 166717 transitions. [2021-06-05 16:53:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:08,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:08,466 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:08,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3613 [2021-06-05 16:53:08,667 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:08,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:08,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1707857389, now seen corresponding path program 155 times [2021-06-05 16:53:08,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:08,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331371094] [2021-06-05 16:53:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:08,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:08,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331371094] [2021-06-05 16:53:08,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331371094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:08,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654553401] [2021-06-05 16:53:08,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:08,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:53:08,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:08,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:08,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:08,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654553401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:08,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:08,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:53:08,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787023718] [2021-06-05 16:53:08,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:53:08,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:08,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:53:08,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:53:08,843 INFO L87 Difference]: Start difference. First operand 43178 states and 166717 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:10,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:10,655 INFO L93 Difference]: Finished difference Result 59754 states and 223244 transitions. [2021-06-05 16:53:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 16:53:10,656 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:10,837 INFO L225 Difference]: With dead ends: 59754 [2021-06-05 16:53:10,837 INFO L226 Difference]: Without dead ends: 59754 [2021-06-05 16:53:10,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 899.0ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 16:53:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59754 states. [2021-06-05 16:53:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59754 to 44087. [2021-06-05 16:53:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44087 states, 44086 states have (on average 3.851517488545116) internal successors, (169798), 44086 states have internal predecessors, (169798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44087 states to 44087 states and 169798 transitions. [2021-06-05 16:53:12,208 INFO L78 Accepts]: Start accepts. Automaton has 44087 states and 169798 transitions. Word has length 28 [2021-06-05 16:53:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:12,208 INFO L482 AbstractCegarLoop]: Abstraction has 44087 states and 169798 transitions. [2021-06-05 16:53:12,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 44087 states and 169798 transitions. [2021-06-05 16:53:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:12,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:12,278 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:12,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3614,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:12,481 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash 652479995, now seen corresponding path program 156 times [2021-06-05 16:53:12,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:12,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167786776] [2021-06-05 16:53:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:12,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:12,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167786776] [2021-06-05 16:53:12,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167786776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:12,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98109504] [2021-06-05 16:53:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:12,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:53:12,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:12,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:12,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:12,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98109504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:12,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:12,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:53:12,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167581395] [2021-06-05 16:53:12,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:53:12,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:12,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:53:12,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:53:12,648 INFO L87 Difference]: Start difference. First operand 44087 states and 169798 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:14,243 INFO L93 Difference]: Finished difference Result 59256 states and 221849 transitions. [2021-06-05 16:53:14,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:53:14,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:14,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:14,398 INFO L225 Difference]: With dead ends: 59256 [2021-06-05 16:53:14,398 INFO L226 Difference]: Without dead ends: 59248 [2021-06-05 16:53:14,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 710.7ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:53:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59248 states. [2021-06-05 16:53:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59248 to 44011. [2021-06-05 16:53:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44011 states, 44010 states have (on average 3.8528061804135425) internal successors, (169562), 44010 states have internal predecessors, (169562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44011 states to 44011 states and 169562 transitions. [2021-06-05 16:53:15,718 INFO L78 Accepts]: Start accepts. Automaton has 44011 states and 169562 transitions. Word has length 28 [2021-06-05 16:53:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:15,718 INFO L482 AbstractCegarLoop]: Abstraction has 44011 states and 169562 transitions. [2021-06-05 16:53:15,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 44011 states and 169562 transitions. [2021-06-05 16:53:15,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:15,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:15,785 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:15,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3615 [2021-06-05 16:53:15,985 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:15,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:15,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2135614933, now seen corresponding path program 157 times [2021-06-05 16:53:15,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:15,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009804237] [2021-06-05 16:53:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:16,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:16,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009804237] [2021-06-05 16:53:16,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009804237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:16,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157845202] [2021-06-05 16:53:16,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:16,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:16,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:16,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157845202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:16,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:16,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:53:16,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846024804] [2021-06-05 16:53:16,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:16,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:16,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:16,142 INFO L87 Difference]: Start difference. First operand 44011 states and 169562 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:17,610 INFO L93 Difference]: Finished difference Result 58733 states and 220603 transitions. [2021-06-05 16:53:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:53:17,610 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:17,756 INFO L225 Difference]: With dead ends: 58733 [2021-06-05 16:53:17,757 INFO L226 Difference]: Without dead ends: 58709 [2021-06-05 16:53:17,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 623.9ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:53:17,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58709 states. [2021-06-05 16:53:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58709 to 43997. [2021-06-05 16:53:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43997 states, 43996 states have (on average 3.8527820710973724) internal successors, (169507), 43996 states have internal predecessors, (169507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43997 states to 43997 states and 169507 transitions. [2021-06-05 16:53:19,152 INFO L78 Accepts]: Start accepts. Automaton has 43997 states and 169507 transitions. Word has length 28 [2021-06-05 16:53:19,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:19,152 INFO L482 AbstractCegarLoop]: Abstraction has 43997 states and 169507 transitions. [2021-06-05 16:53:19,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:19,152 INFO L276 IsEmpty]: Start isEmpty. Operand 43997 states and 169507 transitions. [2021-06-05 16:53:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:19,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:19,227 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:19,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3616,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:19,427 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:19,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:19,428 INFO L82 PathProgramCache]: Analyzing trace with hash -613280551, now seen corresponding path program 158 times [2021-06-05 16:53:19,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:19,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662115065] [2021-06-05 16:53:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:19,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:19,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662115065] [2021-06-05 16:53:19,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662115065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:19,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439468002] [2021-06-05 16:53:19,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:19,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:19,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:19,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439468002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:19,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:19,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:53:19,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368263401] [2021-06-05 16:53:19,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:53:19,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:19,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:53:19,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:53:19,574 INFO L87 Difference]: Start difference. First operand 43997 states and 169507 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:20,897 INFO L93 Difference]: Finished difference Result 58515 states and 219910 transitions. [2021-06-05 16:53:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:53:20,898 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:21,066 INFO L225 Difference]: With dead ends: 58515 [2021-06-05 16:53:21,066 INFO L226 Difference]: Without dead ends: 58475 [2021-06-05 16:53:21,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 818.5ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:53:21,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58475 states. [2021-06-05 16:53:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58475 to 44346. [2021-06-05 16:53:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44346 states, 44345 states have (on average 3.854684857368362) internal successors, (170936), 44345 states have internal predecessors, (170936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44346 states to 44346 states and 170936 transitions. [2021-06-05 16:53:22,438 INFO L78 Accepts]: Start accepts. Automaton has 44346 states and 170936 transitions. Word has length 28 [2021-06-05 16:53:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:22,438 INFO L482 AbstractCegarLoop]: Abstraction has 44346 states and 170936 transitions. [2021-06-05 16:53:22,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 44346 states and 170936 transitions. [2021-06-05 16:53:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:22,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:22,504 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:22,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3617 [2021-06-05 16:53:22,705 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:22,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:22,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1767766801, now seen corresponding path program 159 times [2021-06-05 16:53:22,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:22,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751148022] [2021-06-05 16:53:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:22,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:22,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751148022] [2021-06-05 16:53:22,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751148022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:22,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328232709] [2021-06-05 16:53:22,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:22,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:53:22,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:22,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:22,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:22,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328232709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:22,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:22,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:53:22,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223162800] [2021-06-05 16:53:22,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:22,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:22,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:22,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:22,892 INFO L87 Difference]: Start difference. First operand 44346 states and 170936 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:24,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:24,495 INFO L93 Difference]: Finished difference Result 71060 states and 264453 transitions. [2021-06-05 16:53:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:53:24,496 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:24,687 INFO L225 Difference]: With dead ends: 71060 [2021-06-05 16:53:24,687 INFO L226 Difference]: Without dead ends: 71060 [2021-06-05 16:53:24,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 649.0ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:53:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71060 states. [2021-06-05 16:53:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71060 to 45512. [2021-06-05 16:53:26,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45512 states, 45511 states have (on average 3.869196457999165) internal successors, (176091), 45511 states have internal predecessors, (176091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45512 states to 45512 states and 176091 transitions. [2021-06-05 16:53:26,174 INFO L78 Accepts]: Start accepts. Automaton has 45512 states and 176091 transitions. Word has length 28 [2021-06-05 16:53:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:26,174 INFO L482 AbstractCegarLoop]: Abstraction has 45512 states and 176091 transitions. [2021-06-05 16:53:26,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 45512 states and 176091 transitions. [2021-06-05 16:53:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:26,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:26,243 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:26,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3618 [2021-06-05 16:53:26,443 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1155272981, now seen corresponding path program 160 times [2021-06-05 16:53:26,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:26,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069436589] [2021-06-05 16:53:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:26,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069436589] [2021-06-05 16:53:26,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069436589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897202682] [2021-06-05 16:53:26,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:26,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:26,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:26,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:26,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:26,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897202682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:26,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:26,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:53:26,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765108472] [2021-06-05 16:53:26,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:26,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:26,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:26,621 INFO L87 Difference]: Start difference. First operand 45512 states and 176091 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:28,132 INFO L93 Difference]: Finished difference Result 65145 states and 245703 transitions. [2021-06-05 16:53:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:53:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:28,312 INFO L225 Difference]: With dead ends: 65145 [2021-06-05 16:53:28,312 INFO L226 Difference]: Without dead ends: 65145 [2021-06-05 16:53:28,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 882.2ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:53:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65145 states. [2021-06-05 16:53:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65145 to 45542. [2021-06-05 16:53:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45542 states, 45541 states have (on average 3.868997167387629) internal successors, (176198), 45541 states have internal predecessors, (176198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45542 states to 45542 states and 176198 transitions. [2021-06-05 16:53:29,792 INFO L78 Accepts]: Start accepts. Automaton has 45542 states and 176198 transitions. Word has length 28 [2021-06-05 16:53:29,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:29,792 INFO L482 AbstractCegarLoop]: Abstraction has 45542 states and 176198 transitions. [2021-06-05 16:53:29,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 45542 states and 176198 transitions. [2021-06-05 16:53:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:29,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:29,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:30,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3619 [2021-06-05 16:53:30,061 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:30,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:30,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2039891173, now seen corresponding path program 161 times [2021-06-05 16:53:30,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:30,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914819954] [2021-06-05 16:53:30,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:30,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:30,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914819954] [2021-06-05 16:53:30,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914819954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:30,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359310294] [2021-06-05 16:53:30,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:30,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:53:30,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:30,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:30,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:30,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359310294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:30,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:30,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:53:30,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443280370] [2021-06-05 16:53:30,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:53:30,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:30,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:53:30,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:53:30,261 INFO L87 Difference]: Start difference. First operand 45542 states and 176198 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:32,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:32,301 INFO L93 Difference]: Finished difference Result 66003 states and 248139 transitions. [2021-06-05 16:53:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:53:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:32,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:32,478 INFO L225 Difference]: With dead ends: 66003 [2021-06-05 16:53:32,478 INFO L226 Difference]: Without dead ends: 66003 [2021-06-05 16:53:32,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1012.8ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 16:53:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66003 states. [2021-06-05 16:53:33,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66003 to 45806. [2021-06-05 16:53:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45806 states, 45805 states have (on average 3.8654295382600155) internal successors, (177056), 45805 states have internal predecessors, (177056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45806 states to 45806 states and 177056 transitions. [2021-06-05 16:53:34,266 INFO L78 Accepts]: Start accepts. Automaton has 45806 states and 177056 transitions. Word has length 28 [2021-06-05 16:53:34,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:34,266 INFO L482 AbstractCegarLoop]: Abstraction has 45806 states and 177056 transitions. [2021-06-05 16:53:34,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:34,266 INFO L276 IsEmpty]: Start isEmpty. Operand 45806 states and 177056 transitions. [2021-06-05 16:53:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:34,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:34,350 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:34,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:34,550 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:34,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:34,551 INFO L82 PathProgramCache]: Analyzing trace with hash 984513779, now seen corresponding path program 162 times [2021-06-05 16:53:34,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:34,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558178516] [2021-06-05 16:53:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:34,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:34,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558178516] [2021-06-05 16:53:34,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558178516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:34,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179163390] [2021-06-05 16:53:34,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:34,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:53:34,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:34,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:34,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:34,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179163390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:34,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:34,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:53:34,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554354656] [2021-06-05 16:53:34,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:53:34,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:34,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:53:34,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:53:34,723 INFO L87 Difference]: Start difference. First operand 45806 states and 177056 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:36,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:36,154 INFO L93 Difference]: Finished difference Result 65215 states and 245904 transitions. [2021-06-05 16:53:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:53:36,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:36,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:36,336 INFO L225 Difference]: With dead ends: 65215 [2021-06-05 16:53:36,336 INFO L226 Difference]: Without dead ends: 65211 [2021-06-05 16:53:36,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 756.1ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 16:53:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65211 states. [2021-06-05 16:53:37,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65211 to 45442. [2021-06-05 16:53:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45442 states, 45441 states have (on average 3.869193019519817) internal successors, (175820), 45441 states have internal predecessors, (175820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45442 states to 45442 states and 175820 transitions. [2021-06-05 16:53:38,156 INFO L78 Accepts]: Start accepts. Automaton has 45442 states and 175820 transitions. Word has length 28 [2021-06-05 16:53:38,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:38,156 INFO L482 AbstractCegarLoop]: Abstraction has 45442 states and 175820 transitions. [2021-06-05 16:53:38,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:38,157 INFO L276 IsEmpty]: Start isEmpty. Operand 45442 states and 175820 transitions. [2021-06-05 16:53:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:38,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:38,240 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:38,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3621 [2021-06-05 16:53:38,440 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:38,441 INFO L82 PathProgramCache]: Analyzing trace with hash 452743569, now seen corresponding path program 163 times [2021-06-05 16:53:38,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:38,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644816564] [2021-06-05 16:53:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:38,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:38,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644816564] [2021-06-05 16:53:38,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644816564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:38,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486989532] [2021-06-05 16:53:38,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:38,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:38,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:38,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:38,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486989532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:38,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:38,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:53:38,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853863901] [2021-06-05 16:53:38,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:38,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:38,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:38,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:38,604 INFO L87 Difference]: Start difference. First operand 45442 states and 175820 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:39,549 INFO L93 Difference]: Finished difference Result 59545 states and 226305 transitions. [2021-06-05 16:53:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:53:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:39,712 INFO L225 Difference]: With dead ends: 59545 [2021-06-05 16:53:39,712 INFO L226 Difference]: Without dead ends: 59545 [2021-06-05 16:53:39,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 499.0ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:53:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2021-06-05 16:53:40,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 45458. [2021-06-05 16:53:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45458 states, 45457 states have (on average 3.8710869613040897) internal successors, (175968), 45457 states have internal predecessors, (175968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45458 states to 45458 states and 175968 transitions. [2021-06-05 16:53:41,085 INFO L78 Accepts]: Start accepts. Automaton has 45458 states and 175968 transitions. Word has length 28 [2021-06-05 16:53:41,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:41,085 INFO L482 AbstractCegarLoop]: Abstraction has 45458 states and 175968 transitions. [2021-06-05 16:53:41,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:41,085 INFO L276 IsEmpty]: Start isEmpty. Operand 45458 states and 175968 transitions. [2021-06-05 16:53:41,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:41,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:41,499 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:41,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3622,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:41,700 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:41,700 INFO L82 PathProgramCache]: Analyzing trace with hash 75176401, now seen corresponding path program 164 times [2021-06-05 16:53:41,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:41,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349395935] [2021-06-05 16:53:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:41,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:41,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349395935] [2021-06-05 16:53:41,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349395935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:41,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563349627] [2021-06-05 16:53:41,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:41,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:53:41,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:41,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:41,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563349627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:41,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:41,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:53:41,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613671795] [2021-06-05 16:53:41,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:41,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:41,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:41,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:41,860 INFO L87 Difference]: Start difference. First operand 45458 states and 175968 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:42,661 INFO L93 Difference]: Finished difference Result 58859 states and 224430 transitions. [2021-06-05 16:53:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:53:42,661 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:42,821 INFO L225 Difference]: With dead ends: 58859 [2021-06-05 16:53:42,822 INFO L226 Difference]: Without dead ends: 58847 [2021-06-05 16:53:42,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:53:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58847 states. [2021-06-05 16:53:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58847 to 45392. [2021-06-05 16:53:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45392 states, 45391 states have (on average 3.8722433962679825) internal successors, (175765), 45391 states have internal predecessors, (175765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45392 states to 45392 states and 175765 transitions. [2021-06-05 16:53:44,179 INFO L78 Accepts]: Start accepts. Automaton has 45392 states and 175765 transitions. Word has length 28 [2021-06-05 16:53:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:44,179 INFO L482 AbstractCegarLoop]: Abstraction has 45392 states and 175765 transitions. [2021-06-05 16:53:44,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 45392 states and 175765 transitions. [2021-06-05 16:53:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:44,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:44,251 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:44,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3623 [2021-06-05 16:53:44,451 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:44,451 INFO L82 PathProgramCache]: Analyzing trace with hash -681682287, now seen corresponding path program 165 times [2021-06-05 16:53:44,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:44,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721126478] [2021-06-05 16:53:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:44,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:44,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721126478] [2021-06-05 16:53:44,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721126478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:44,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719924447] [2021-06-05 16:53:44,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:44,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:53:44,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:44,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:44,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:44,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719924447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:44,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:44,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:53:44,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751676597] [2021-06-05 16:53:44,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:53:44,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:44,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:53:44,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:53:44,650 INFO L87 Difference]: Start difference. First operand 45392 states and 175765 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:45,172 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-06-05 16:53:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:45,592 INFO L93 Difference]: Finished difference Result 49879 states and 190563 transitions. [2021-06-05 16:53:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:53:45,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:45,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:45,735 INFO L225 Difference]: With dead ends: 49879 [2021-06-05 16:53:45,735 INFO L226 Difference]: Without dead ends: 49879 [2021-06-05 16:53:45,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 562.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:53:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49879 states. [2021-06-05 16:53:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49879 to 45600. [2021-06-05 16:53:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45600 states, 45599 states have (on average 3.8697559156999057) internal successors, (176457), 45599 states have internal predecessors, (176457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:46,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45600 states to 45600 states and 176457 transitions. [2021-06-05 16:53:46,956 INFO L78 Accepts]: Start accepts. Automaton has 45600 states and 176457 transitions. Word has length 28 [2021-06-05 16:53:46,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:46,956 INFO L482 AbstractCegarLoop]: Abstraction has 45600 states and 176457 transitions. [2021-06-05 16:53:46,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 45600 states and 176457 transitions. [2021-06-05 16:53:47,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:47,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:47,026 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:47,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3624,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:47,227 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:47,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:47,227 INFO L82 PathProgramCache]: Analyzing trace with hash -852441489, now seen corresponding path program 166 times [2021-06-05 16:53:47,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:47,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658186107] [2021-06-05 16:53:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:47,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:47,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658186107] [2021-06-05 16:53:47,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658186107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:47,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730300326] [2021-06-05 16:53:47,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:47,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:47,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:47,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:47,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730300326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:47,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:47,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:53:47,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866574519] [2021-06-05 16:53:47,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:53:47,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:53:47,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:53:47,413 INFO L87 Difference]: Start difference. First operand 45600 states and 176457 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:48,195 INFO L93 Difference]: Finished difference Result 49726 states and 190165 transitions. [2021-06-05 16:53:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:53:48,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:48,365 INFO L225 Difference]: With dead ends: 49726 [2021-06-05 16:53:48,366 INFO L226 Difference]: Without dead ends: 49722 [2021-06-05 16:53:48,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 353.7ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49722 states. [2021-06-05 16:53:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49722 to 45540. [2021-06-05 16:53:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45540 states, 45539 states have (on average 3.8706383539383826) internal successors, (176265), 45539 states have internal predecessors, (176265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45540 states to 45540 states and 176265 transitions. [2021-06-05 16:53:50,379 INFO L78 Accepts]: Start accepts. Automaton has 45540 states and 176265 transitions. Word has length 28 [2021-06-05 16:53:50,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:50,379 INFO L482 AbstractCegarLoop]: Abstraction has 45540 states and 176265 transitions. [2021-06-05 16:53:50,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:50,379 INFO L276 IsEmpty]: Start isEmpty. Operand 45540 states and 176265 transitions. [2021-06-05 16:53:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:50,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:50,818 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:51,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3625 [2021-06-05 16:53:51,041 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:51,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:51,041 INFO L82 PathProgramCache]: Analyzing trace with hash -492872947, now seen corresponding path program 81 times [2021-06-05 16:53:51,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:51,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125842177] [2021-06-05 16:53:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:51,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:51,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125842177] [2021-06-05 16:53:51,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125842177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:51,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134426889] [2021-06-05 16:53:51,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:51,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:53:51,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:51,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:51,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:51,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134426889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:51,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:51,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 16:53:51,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515929287] [2021-06-05 16:53:51,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:53:51,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:51,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:53:51,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:53:51,165 INFO L87 Difference]: Start difference. First operand 45540 states and 176265 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:51,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:51,750 INFO L93 Difference]: Finished difference Result 49767 states and 190248 transitions. [2021-06-05 16:53:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:53:51,750 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:51,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:51,882 INFO L225 Difference]: With dead ends: 49767 [2021-06-05 16:53:51,882 INFO L226 Difference]: Without dead ends: 49767 [2021-06-05 16:53:51,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:53:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49767 states. [2021-06-05 16:53:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49767 to 45644. [2021-06-05 16:53:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45644 states, 45643 states have (on average 3.8689174681769383) internal successors, (176589), 45643 states have internal predecessors, (176589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45644 states to 45644 states and 176589 transitions. [2021-06-05 16:53:53,307 INFO L78 Accepts]: Start accepts. Automaton has 45644 states and 176589 transitions. Word has length 28 [2021-06-05 16:53:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:53,307 INFO L482 AbstractCegarLoop]: Abstraction has 45644 states and 176589 transitions. [2021-06-05 16:53:53,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 45644 states and 176589 transitions. [2021-06-05 16:53:53,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:53,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:53,378 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:53,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3626,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:53,578 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1753160091, now seen corresponding path program 82 times [2021-06-05 16:53:53,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:53,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89832509] [2021-06-05 16:53:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:53,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:53,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89832509] [2021-06-05 16:53:53,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89832509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:53,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015418029] [2021-06-05 16:53:53,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:53,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:53:53,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:53,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:53,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:53,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015418029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:53,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:53,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 16:53:53,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113774888] [2021-06-05 16:53:53,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:53:53,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:53,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:53:53,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:53:53,744 INFO L87 Difference]: Start difference. First operand 45644 states and 176589 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:54,360 INFO L93 Difference]: Finished difference Result 56748 states and 216058 transitions. [2021-06-05 16:53:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:53:54,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:54,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:54,859 INFO L225 Difference]: With dead ends: 56748 [2021-06-05 16:53:54,860 INFO L226 Difference]: Without dead ends: 56658 [2021-06-05 16:53:54,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:53:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56658 states. [2021-06-05 16:53:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56658 to 45467. [2021-06-05 16:53:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45467 states, 45466 states have (on average 3.8675713720142526) internal successors, (175843), 45466 states have internal predecessors, (175843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45467 states to 45467 states and 175843 transitions. [2021-06-05 16:53:56,178 INFO L78 Accepts]: Start accepts. Automaton has 45467 states and 175843 transitions. Word has length 28 [2021-06-05 16:53:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:56,178 INFO L482 AbstractCegarLoop]: Abstraction has 45467 states and 175843 transitions. [2021-06-05 16:53:56,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:56,178 INFO L276 IsEmpty]: Start isEmpty. Operand 45467 states and 175843 transitions. [2021-06-05 16:53:56,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:56,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:56,249 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:56,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3627 [2021-06-05 16:53:56,453 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:56,453 INFO L82 PathProgramCache]: Analyzing trace with hash -115621907, now seen corresponding path program 83 times [2021-06-05 16:53:56,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:56,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171151772] [2021-06-05 16:53:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:56,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:56,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171151772] [2021-06-05 16:53:56,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171151772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:56,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866062395] [2021-06-05 16:53:56,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:56,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:53:56,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:56,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:53:56,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866062395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:56,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:56,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 16:53:56,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055572593] [2021-06-05 16:53:56,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:53:56,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:56,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:53:56,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:53:56,561 INFO L87 Difference]: Start difference. First operand 45467 states and 175843 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:57,038 INFO L93 Difference]: Finished difference Result 49946 states and 190806 transitions. [2021-06-05 16:53:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:53:57,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:57,186 INFO L225 Difference]: With dead ends: 49946 [2021-06-05 16:53:57,186 INFO L226 Difference]: Without dead ends: 49934 [2021-06-05 16:53:57,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:53:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49934 states. [2021-06-05 16:53:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49934 to 45605. [2021-06-05 16:53:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45605 states, 45604 states have (on average 3.865713533900535) internal successors, (176292), 45604 states have internal predecessors, (176292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45605 states to 45605 states and 176292 transitions. [2021-06-05 16:53:58,461 INFO L78 Accepts]: Start accepts. Automaton has 45605 states and 176292 transitions. Word has length 28 [2021-06-05 16:53:58,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:53:58,461 INFO L482 AbstractCegarLoop]: Abstraction has 45605 states and 176292 transitions. [2021-06-05 16:53:58,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 45605 states and 176292 transitions. [2021-06-05 16:53:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:53:58,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:53:58,529 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:53:58,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3628 [2021-06-05 16:53:58,729 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:53:58,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:53:58,729 INFO L82 PathProgramCache]: Analyzing trace with hash -903981331, now seen corresponding path program 84 times [2021-06-05 16:53:58,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:53:58,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860858110] [2021-06-05 16:53:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:53:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:53:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:58,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:53:58,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860858110] [2021-06-05 16:53:58,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860858110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:58,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021594160] [2021-06-05 16:53:58,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:53:58,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:53:58,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:53:58,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:53:58,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:53:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:53:58,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021594160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:53:58,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:53:58,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 16:53:58,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695032518] [2021-06-05 16:53:58,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:53:58,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:53:58,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:53:58,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:53:58,845 INFO L87 Difference]: Start difference. First operand 45605 states and 176292 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:53:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:53:59,711 INFO L93 Difference]: Finished difference Result 49910 states and 190722 transitions. [2021-06-05 16:53:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:53:59,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:53:59,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:53:59,852 INFO L225 Difference]: With dead ends: 49910 [2021-06-05 16:53:59,852 INFO L226 Difference]: Without dead ends: 49890 [2021-06-05 16:53:59,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:53:59,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49890 states. [2021-06-05 16:54:00,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49890 to 45605. [2021-06-05 16:54:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45605 states, 45604 states have (on average 3.86562582229629) internal successors, (176288), 45604 states have internal predecessors, (176288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45605 states to 45605 states and 176288 transitions. [2021-06-05 16:54:01,134 INFO L78 Accepts]: Start accepts. Automaton has 45605 states and 176288 transitions. Word has length 28 [2021-06-05 16:54:01,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:01,134 INFO L482 AbstractCegarLoop]: Abstraction has 45605 states and 176288 transitions. [2021-06-05 16:54:01,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 45605 states and 176288 transitions. [2021-06-05 16:54:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:01,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:01,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:01,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3629 [2021-06-05 16:54:01,404 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash 987543313, now seen corresponding path program 167 times [2021-06-05 16:54:01,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:01,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512865890] [2021-06-05 16:54:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:01,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:01,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512865890] [2021-06-05 16:54:01,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512865890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:01,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941607709] [2021-06-05 16:54:01,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:01,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:54:01,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:01,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:54:01,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:01,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941607709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:01,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:01,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:54:01,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433882854] [2021-06-05 16:54:01,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:54:01,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:54:01,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:54:01,531 INFO L87 Difference]: Start difference. First operand 45605 states and 176288 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:01,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:01,970 INFO L93 Difference]: Finished difference Result 50572 states and 193874 transitions. [2021-06-05 16:54:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:54:01,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:01,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:02,108 INFO L225 Difference]: With dead ends: 50572 [2021-06-05 16:54:02,108 INFO L226 Difference]: Without dead ends: 50559 [2021-06-05 16:54:02,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:54:02,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50559 states. [2021-06-05 16:54:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50559 to 48338. [2021-06-05 16:54:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48338 states, 48337 states have (on average 3.8743819434387734) internal successors, (187276), 48337 states have internal predecessors, (187276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48338 states to 48338 states and 187276 transitions. [2021-06-05 16:54:03,411 INFO L78 Accepts]: Start accepts. Automaton has 48338 states and 187276 transitions. Word has length 28 [2021-06-05 16:54:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:03,411 INFO L482 AbstractCegarLoop]: Abstraction has 48338 states and 187276 transitions. [2021-06-05 16:54:03,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 48338 states and 187276 transitions. [2021-06-05 16:54:03,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:03,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:03,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:03,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3630,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:03,691 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:03,692 INFO L82 PathProgramCache]: Analyzing trace with hash 304798983, now seen corresponding path program 168 times [2021-06-05 16:54:03,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:03,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580721939] [2021-06-05 16:54:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:03,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:03,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580721939] [2021-06-05 16:54:03,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580721939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:03,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943844997] [2021-06-05 16:54:03,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:03,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:54:03,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:03,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:54:03,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:03,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943844997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:03,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:03,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:54:03,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98167232] [2021-06-05 16:54:03,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:54:03,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:03,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:54:03,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:54:03,825 INFO L87 Difference]: Start difference. First operand 48338 states and 187276 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:04,653 INFO L93 Difference]: Finished difference Result 53920 states and 205320 transitions. [2021-06-05 16:54:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:54:04,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:04,798 INFO L225 Difference]: With dead ends: 53920 [2021-06-05 16:54:04,799 INFO L226 Difference]: Without dead ends: 53920 [2021-06-05 16:54:04,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:54:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53920 states. [2021-06-05 16:54:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53920 to 42878. [2021-06-05 16:54:05,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 3.8613708981505237) internal successors, (165564), 42877 states have internal predecessors, (165564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 165564 transitions. [2021-06-05 16:54:06,103 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 165564 transitions. Word has length 28 [2021-06-05 16:54:06,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:06,103 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 165564 transitions. [2021-06-05 16:54:06,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 165564 transitions. [2021-06-05 16:54:06,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:06,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:06,171 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:06,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3631,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:06,371 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:06,372 INFO L82 PathProgramCache]: Analyzing trace with hash -15319481, now seen corresponding path program 169 times [2021-06-05 16:54:06,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:06,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095920101] [2021-06-05 16:54:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:06,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:06,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095920101] [2021-06-05 16:54:06,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095920101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:06,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670136876] [2021-06-05 16:54:06,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:06,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:54:06,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:06,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670136876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:06,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:06,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:54:06,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77755242] [2021-06-05 16:54:06,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:54:06,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:06,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:54:06,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:54:06,500 INFO L87 Difference]: Start difference. First operand 42878 states and 165564 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:07,051 INFO L93 Difference]: Finished difference Result 47758 states and 181995 transitions. [2021-06-05 16:54:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:54:07,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:07,175 INFO L225 Difference]: With dead ends: 47758 [2021-06-05 16:54:07,175 INFO L226 Difference]: Without dead ends: 47758 [2021-06-05 16:54:07,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:54:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47758 states. [2021-06-05 16:54:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47758 to 43711. [2021-06-05 16:54:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43711 states, 43710 states have (on average 3.8600320292839165) internal successors, (168722), 43710 states have internal predecessors, (168722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43711 states to 43711 states and 168722 transitions. [2021-06-05 16:54:08,380 INFO L78 Accepts]: Start accepts. Automaton has 43711 states and 168722 transitions. Word has length 28 [2021-06-05 16:54:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:08,380 INFO L482 AbstractCegarLoop]: Abstraction has 43711 states and 168722 transitions. [2021-06-05 16:54:08,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 43711 states and 168722 transitions. [2021-06-05 16:54:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:08,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:08,454 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:08,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:08,655 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:08,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1024489657, now seen corresponding path program 170 times [2021-06-05 16:54:08,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:08,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322790520] [2021-06-05 16:54:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:08,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:08,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322790520] [2021-06-05 16:54:08,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322790520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:08,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109806797] [2021-06-05 16:54:08,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:08,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:54:08,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:08,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:54:08,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:08,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109806797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:08,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:08,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:54:08,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101125311] [2021-06-05 16:54:08,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:54:08,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:08,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:54:08,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:54:08,791 INFO L87 Difference]: Start difference. First operand 43711 states and 168722 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:09,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:09,233 INFO L93 Difference]: Finished difference Result 45468 states and 174583 transitions. [2021-06-05 16:54:09,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:54:09,234 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:09,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:09,788 INFO L225 Difference]: With dead ends: 45468 [2021-06-05 16:54:09,789 INFO L226 Difference]: Without dead ends: 45468 [2021-06-05 16:54:09,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:54:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45468 states. [2021-06-05 16:54:10,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45468 to 43719. [2021-06-05 16:54:10,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43719 states, 43718 states have (on average 3.85987465117343) internal successors, (168746), 43718 states have internal predecessors, (168746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43719 states to 43719 states and 168746 transitions. [2021-06-05 16:54:10,618 INFO L78 Accepts]: Start accepts. Automaton has 43719 states and 168746 transitions. Word has length 28 [2021-06-05 16:54:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:10,618 INFO L482 AbstractCegarLoop]: Abstraction has 43719 states and 168746 transitions. [2021-06-05 16:54:10,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 43719 states and 168746 transitions. [2021-06-05 16:54:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:54:10,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:10,684 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:11,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3633,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:11,006 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:11,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1121758121, now seen corresponding path program 171 times [2021-06-05 16:54:11,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:11,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084734121] [2021-06-05 16:54:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:11,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:11,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084734121] [2021-06-05 16:54:11,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084734121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:11,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791210515] [2021-06-05 16:54:11,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:11,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:54:11,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:11,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:54:11,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:11,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791210515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:11,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:11,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:54:11,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876243852] [2021-06-05 16:54:11,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:54:11,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:11,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:54:11,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:54:11,171 INFO L87 Difference]: Start difference. First operand 43719 states and 168746 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:11,632 INFO L93 Difference]: Finished difference Result 45188 states and 173661 transitions. [2021-06-05 16:54:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:54:11,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:54:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:11,744 INFO L225 Difference]: With dead ends: 45188 [2021-06-05 16:54:11,744 INFO L226 Difference]: Without dead ends: 45188 [2021-06-05 16:54:11,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:54:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45188 states. [2021-06-05 16:54:12,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45188 to 43613. [2021-06-05 16:54:12,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43613 states, 43612 states have (on average 3.859534073190865) internal successors, (168322), 43612 states have internal predecessors, (168322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43613 states to 43613 states and 168322 transitions. [2021-06-05 16:54:12,845 INFO L78 Accepts]: Start accepts. Automaton has 43613 states and 168322 transitions. Word has length 28 [2021-06-05 16:54:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:12,845 INFO L482 AbstractCegarLoop]: Abstraction has 43613 states and 168322 transitions. [2021-06-05 16:54:12,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 43613 states and 168322 transitions. [2021-06-05 16:54:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:12,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:12,915 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:13,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3634,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:13,116 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:13,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1358211129, now seen corresponding path program 172 times [2021-06-05 16:54:13,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:13,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703679065] [2021-06-05 16:54:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:13,436 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2021-06-05 16:54:13,587 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-06-05 16:54:13,728 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 16:54:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:14,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:14,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703679065] [2021-06-05 16:54:14,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703679065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:14,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580984849] [2021-06-05 16:54:14,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:14,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:54:14,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:14,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 16:54:14,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:14,430 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 16:54:14,836 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:54:15,393 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 103 [2021-06-05 16:54:15,635 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:54:15,867 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 16:54:16,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:16,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:16,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:16,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 16:54:16,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:16,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:16,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:16,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:16,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-05 16:54:16,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:16,855 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 147 [2021-06-05 16:54:16,856 INFO L628 ElimStorePlain]: treesize reduction 364, result has 54.9 percent of original size [2021-06-05 16:54:16,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:16,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:16,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:16,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:16,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2021-06-05 16:54:16,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:16,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:16,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:16,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:16,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 16:54:16,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:17,057 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-06-05 16:54:17,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:17,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:17,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:17,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:17,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:54:17,069 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:17,235 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 16:54:17,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:17,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:17,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:17,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:17,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:54:17,247 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:17,403 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 16:54:17,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:17,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:17,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:17,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:17,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:54:17,414 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:17,561 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:54:17,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:17,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:17,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:17,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:54:17,571 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:17,713 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 16:54:17,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:17,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:17,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:17,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:54:17,722 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:17,853 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:54:17,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:17,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:17,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:17,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:17,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 16:54:17,862 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:17,987 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 16:54:17,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:17,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:54:17,992 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:867, output treesize:87 [2021-06-05 16:54:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:18,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580984849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:18,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:18,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:54:18,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008142028] [2021-06-05 16:54:18,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:54:18,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:18,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:54:18,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:54:18,077 INFO L87 Difference]: Start difference. First operand 43613 states and 168322 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:18,296 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2021-06-05 16:54:18,554 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2021-06-05 16:54:19,110 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 117 [2021-06-05 16:54:19,436 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 86 [2021-06-05 16:54:19,963 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-06-05 16:54:20,725 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2021-06-05 16:54:21,689 WARN L205 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 127 [2021-06-05 16:54:22,939 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 163 DAG size of output: 146 [2021-06-05 16:54:23,181 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 16:54:23,407 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 16:54:23,896 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 108 [2021-06-05 16:54:24,426 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 131 [2021-06-05 16:54:24,883 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 128 [2021-06-05 16:54:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:25,396 INFO L93 Difference]: Finished difference Result 46436 states and 176472 transitions. [2021-06-05 16:54:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:54:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:25,512 INFO L225 Difference]: With dead ends: 46436 [2021-06-05 16:54:25,512 INFO L226 Difference]: Without dead ends: 46376 [2021-06-05 16:54:25,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 8401.9ms TimeCoverageRelationStatistics Valid=297, Invalid=1595, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:54:25,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46376 states. [2021-06-05 16:54:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46376 to 43670. [2021-06-05 16:54:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43670 states, 43669 states have (on average 3.858686940392498) internal successors, (168505), 43669 states have internal predecessors, (168505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:26,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43670 states to 43670 states and 168505 transitions. [2021-06-05 16:54:26,491 INFO L78 Accepts]: Start accepts. Automaton has 43670 states and 168505 transitions. Word has length 30 [2021-06-05 16:54:26,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:26,491 INFO L482 AbstractCegarLoop]: Abstraction has 43670 states and 168505 transitions. [2021-06-05 16:54:26,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 43670 states and 168505 transitions. [2021-06-05 16:54:26,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:26,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:26,563 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:26,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3635 [2021-06-05 16:54:26,765 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:26,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:26,766 INFO L82 PathProgramCache]: Analyzing trace with hash 908358151, now seen corresponding path program 173 times [2021-06-05 16:54:26,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:26,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832326314] [2021-06-05 16:54:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:27,102 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 95 [2021-06-05 16:54:27,314 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2021-06-05 16:54:27,529 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2021-06-05 16:54:27,714 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-06-05 16:54:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:27,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:54:27,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832326314] [2021-06-05 16:54:27,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832326314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:27,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373715289] [2021-06-05 16:54:27,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:28,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:54:28,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:54:28,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 16:54:28,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:54:28,434 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 16:54:28,689 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:54:29,058 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:54:29,318 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:54:29,457 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 16:54:30,306 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 124 [2021-06-05 16:54:30,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:30,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:30,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:30,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:30,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 32 [2021-06-05 16:54:30,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:30,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:30,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:30,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:30,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2021-06-05 16:54:30,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:30,933 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 154 [2021-06-05 16:54:30,934 INFO L628 ElimStorePlain]: treesize reduction 149, result has 75.5 percent of original size [2021-06-05 16:54:30,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:30,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:30,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:30,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:30,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2021-06-05 16:54:30,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:31,158 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 16:54:31,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:31,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:31,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:31,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:54:31,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:31,373 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 16:54:31,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:31,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:31,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:31,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:31,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:31,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 16:54:31,388 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:31,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:31,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:31,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:54:31,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:31,740 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 124 [2021-06-05 16:54:31,741 INFO L628 ElimStorePlain]: treesize reduction 22, result has 94.1 percent of original size [2021-06-05 16:54:31,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:31,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:31,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:31,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 16:54:31,750 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:31,906 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:54:31,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:31,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:31,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:31,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 16:54:31,919 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:31,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:31,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:31,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:31,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 16:54:31,929 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:32,171 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 96 [2021-06-05 16:54:32,171 INFO L628 ElimStorePlain]: treesize reduction 22, result has 91.7 percent of original size [2021-06-05 16:54:32,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:32,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:32,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:32,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 16:54:32,181 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:32,288 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:54:32,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:32,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:54:32,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:32,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:54:32,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-05 16:54:32,298 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:54:32,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:54:32,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:54:32,401 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:689, output treesize:93 [2021-06-05 16:54:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:54:32,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373715289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:54:32,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:54:32,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:54:32,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31634092] [2021-06-05 16:54:32,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:54:32,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:54:32,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:54:32,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:54:32,493 INFO L87 Difference]: Start difference. First operand 43670 states and 168505 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:32,709 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2021-06-05 16:54:32,955 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2021-06-05 16:54:33,336 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 16:54:34,289 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 138 [2021-06-05 16:54:34,938 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 120 [2021-06-05 16:54:36,157 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 160 DAG size of output: 142 [2021-06-05 16:54:36,523 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:54:37,042 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 107 [2021-06-05 16:54:37,556 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 16:54:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:54:37,917 INFO L93 Difference]: Finished difference Result 43954 states and 169226 transitions. [2021-06-05 16:54:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:54:37,918 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:54:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:54:38,015 INFO L225 Difference]: With dead ends: 43954 [2021-06-05 16:54:38,015 INFO L226 Difference]: Without dead ends: 43924 [2021-06-05 16:54:38,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 6733.8ms TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:54:38,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43924 states. [2021-06-05 16:54:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43924 to 43662. [2021-06-05 16:54:38,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43662 states, 43661 states have (on average 3.8589129887084583) internal successors, (168484), 43661 states have internal predecessors, (168484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43662 states to 43662 states and 168484 transitions. [2021-06-05 16:54:38,910 INFO L78 Accepts]: Start accepts. Automaton has 43662 states and 168484 transitions. Word has length 30 [2021-06-05 16:54:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:54:38,910 INFO L482 AbstractCegarLoop]: Abstraction has 43662 states and 168484 transitions. [2021-06-05 16:54:38,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:54:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 43662 states and 168484 transitions. [2021-06-05 16:54:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:54:38,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:54:38,978 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:54:39,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:54:39,181 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:54:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:54:39,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1795179837, now seen corresponding path program 174 times [2021-06-05 16:54:39,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:54:39,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411489746] [2021-06-05 16:54:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:54:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:54:39,720 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-06-05 16:54:39,878 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 Received shutdown request... [2021-06-05 16:54:40,012 WARN L222 SmtUtils]: Removed 18 from assertion stack [2021-06-05 16:54:40,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3717 [2021-06-05 16:54:40,012 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:54:40,013 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:54:40,015 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:54:40,016 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:54:40 BasicIcfg [2021-06-05 16:54:40,016 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:54:40,016 INFO L168 Benchmark]: Toolchain (without parser) took 763839.20 ms. Allocated memory was 329.3 MB in the beginning and 15.8 GB in the end (delta: 15.5 GB). Free memory was 309.0 MB in the beginning and 13.1 GB in the end (delta: -12.8 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.0 GB. [2021-06-05 16:54:40,016 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 329.3 MB. Free memory was 310.2 MB in the beginning and 310.2 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:54:40,016 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.04 ms. Allocated memory is still 329.3 MB. Free memory was 309.0 MB in the beginning and 307.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:54:40,016 INFO L168 Benchmark]: Boogie Preprocessor took 15.23 ms. Allocated memory is still 329.3 MB. Free memory was 307.5 MB in the beginning and 306.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 16:54:40,016 INFO L168 Benchmark]: RCFGBuilder took 337.04 ms. Allocated memory is still 329.3 MB. Free memory was 306.4 MB in the beginning and 292.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 16:54:40,016 INFO L168 Benchmark]: TraceAbstraction took 763454.02 ms. Allocated memory was 329.3 MB in the beginning and 15.8 GB in the end (delta: 15.5 GB). Free memory was 292.2 MB in the beginning and 13.1 GB in the end (delta: -12.8 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.0 GB. [2021-06-05 16:54:40,017 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 329.3 MB. Free memory was 310.2 MB in the beginning and 310.2 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.04 ms. Allocated memory is still 329.3 MB. Free memory was 309.0 MB in the beginning and 307.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.23 ms. Allocated memory is still 329.3 MB. Free memory was 307.5 MB in the beginning and 306.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 337.04 ms. Allocated memory is still 329.3 MB. Free memory was 306.4 MB in the beginning and 292.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 763454.02 ms. Allocated memory was 329.3 MB in the beginning and 15.8 GB in the end (delta: 15.5 GB). Free memory was 292.2 MB in the beginning and 13.1 GB in the end (delta: -12.8 GB). Peak memory consumption was 2.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 100 for 83ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 100 for 83ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 100 for 83ms.. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 100 for 83ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 763302.0ms, OverallIterations: 260, TraceHistogramMax: 3, EmptinessCheckTime: 5346.8ms, AutomataDifference: 387169.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11403 SDtfs, 71358 SDslu, 87490 SDs, 0 SdLazy, 141124 SolverSat, 12985 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 85834.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16517 GetRequests, 5479 SyntacticMatches, 247 SemanticMatches, 10791 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179733 ImplicationChecksByTransitivity, 346204.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48338occurred in iteration=253, InterpolantAutomatonStates: 9573, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 85163.5ms AutomataMinimizationTime, 259 MinimizatonAttempts, 1250509 StatesRemovedByMinimization, 258 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 987.4ms SsaConstructionTime, 3194.3ms SatisfiabilityAnalysisTime, 222517.1ms InterpolantComputationTime, 13778 NumberOfCodeBlocks, 13778 NumberOfCodeBlocksAsserted, 898 NumberOfCheckSat, 13262 ConstructedInterpolants, 158 QuantifiedInterpolants, 280741 SizeOfPredicates, 1252 NumberOfNonLiveVariables, 19144 ConjunctsInSsa, 4305 ConjunctsInUnsatCore, 516 InterpolantComputations, 2 PerfectInterpolantSequences, 1020/4369 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown