/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/sum-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:57:19,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:57:19,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:57:19,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:57:19,705 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 16:57:19,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:57:19,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:57:19,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:57:19,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:57:19,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:57:19,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:57:19,735 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:57:19,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:57:19,736 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:57:19,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:57:19,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:57:19,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:57:19,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:57:19,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:57:19,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:57:19,736 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:57:19,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:57:19,737 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:57:19,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:57:19,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:57:19,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:57:19,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:57:19,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:57:19,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:57:19,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:57:19,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:57:19,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:57:19,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:57:19,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:57:19,738 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:57:19,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:57:19,738 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:57:19,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:57:20,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:57:20,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:57:20,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:57:20,087 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:57:20,088 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:57:20,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array.wvr.bpl [2021-06-05 16:57:20,089 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array.wvr.bpl' [2021-06-05 16:57:20,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:57:20,130 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:57:20,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:57:20,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:57:20,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:57:20,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:20" (1/1) ... [2021-06-05 16:57:20,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:20" (1/1) ... [2021-06-05 16:57:20,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:57:20,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:57:20,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:57:20,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:57:20,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:20" (1/1) ... [2021-06-05 16:57:20,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:20" (1/1) ... [2021-06-05 16:57:20,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:20" (1/1) ... [2021-06-05 16:57:20,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:20" (1/1) ... [2021-06-05 16:57:20,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:20" (1/1) ... [2021-06-05 16:57:20,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:20" (1/1) ... [2021-06-05 16:57:20,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:20" (1/1) ... [2021-06-05 16:57:20,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:57:20,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:57:20,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:57:20,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:57:20,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:20" (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 16:57:20,239 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:57:20,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:57:20,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:57:20,240 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:57:20,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:57:20,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:57:20,241 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:57:20,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:57:20,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:57:20,241 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:57:20,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:57:20,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:57:20,243 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 16:57:20,467 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:57:20,468 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:57:20,469 INFO L202 PluginConnector]: Adding new model sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:57:20 BoogieIcfgContainer [2021-06-05 16:57:20,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:57:20,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:57:20,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:57:20,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:57:20,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:20" (1/2) ... [2021-06-05 16:57:20,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cf3f13 and model type sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:57:20, skipping insertion in model container [2021-06-05 16:57:20,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:57:20" (2/2) ... [2021-06-05 16:57:20,475 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-array.wvr.bpl [2021-06-05 16:57:20,479 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:57:20,480 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:57:20,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:57:20,497 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:57:20,546 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:57:20,564 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:57:20,593 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:57:20,593 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:57:20,593 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:57:20,593 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:57:20,593 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:57:20,594 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:57:20,594 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:57:20,594 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:57:20,601 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 16:57:20,620 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 16:57:20,623 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 16:57:20,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:57:20,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:20,630 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 16:57:20,630 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:20,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:20,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-06-05 16:57:20,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:20,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738371181] [2021-06-05 16:57:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:20,808 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 16:57:20,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:20,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738371181] [2021-06-05 16:57:20,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738371181] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:57:20,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:57:20,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:57:20,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963668527] [2021-06-05 16:57:20,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:57:20,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:20,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:57:20,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:57:20,834 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 16:57:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:20,890 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-05 16:57:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:57:20,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 16:57:20,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:20,907 INFO L225 Difference]: With dead ends: 217 [2021-06-05 16:57:20,907 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 16:57:20,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:57:20,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 16:57:20,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-05 16:57:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-05 16:57:20,972 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-05 16:57:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:20,973 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-05 16:57:20,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 16:57:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-05 16:57:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:57:20,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:20,975 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 16:57:20,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:57:20,975 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:20,976 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-06-05 16:57:20,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:20,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868189367] [2021-06-05 16:57:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:21,056 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 16:57:21,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:21,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868189367] [2021-06-05 16:57:21,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868189367] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:57:21,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:57:21,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:57:21,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566882668] [2021-06-05 16:57:21,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:57:21,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:21,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:57:21,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:57:21,060 INFO L87 Difference]: Start difference. First operand 149 states and 419 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 16:57:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:21,102 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-05 16:57:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:57:21,103 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 16:57:21,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:21,107 INFO L225 Difference]: With dead ends: 158 [2021-06-05 16:57:21,108 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 16:57:21,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:57:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 16:57:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-05 16:57:21,120 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 16:57:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 16:57:21,121 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-05 16:57:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:21,122 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 16:57:21,122 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 16:57:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 16:57:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:57:21,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:21,123 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 16:57:21,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:57:21,124 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-06-05 16:57:21,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:21,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967213239] [2021-06-05 16:57:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:21,187 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 16:57:21,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:21,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967213239] [2021-06-05 16:57:21,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967213239] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:57:21,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:57:21,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:57:21,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456409711] [2021-06-05 16:57:21,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:57:21,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:21,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:57:21,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:57:21,196 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) 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 16:57:21,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:21,260 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-05 16:57:21,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:57:21,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) 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 16:57:21,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:21,263 INFO L225 Difference]: With dead ends: 183 [2021-06-05 16:57:21,263 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 16:57:21,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:57:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 16:57:21,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-05 16:57:21,271 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 16:57:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 16:57:21,277 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 16:57:21,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:21,277 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 16:57:21,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) 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 16:57:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 16:57:21,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:57:21,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:21,281 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 16:57:21,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 16:57:21,281 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:21,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:21,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-06-05 16:57:21,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:21,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973857946] [2021-06-05 16:57:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:21,578 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 16:57:21,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:21,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973857946] [2021-06-05 16:57:21,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973857946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:21,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254699367] [2021-06-05 16:57:21,579 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 16:57:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:21,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:57:21,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:21,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:21,849 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 11 treesize of output 7 [2021-06-05 16:57:21,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:21,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:21,857 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 16:57:21,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2021-06-05 16:57:21,879 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 16:57:21,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254699367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:21,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:21,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:57:21,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103049629] [2021-06-05 16:57:21,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:57:21,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:21,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:57:21,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:57:21,882 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) 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 16:57:22,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:22,070 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 16:57:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:57:22,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) 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 22 [2021-06-05 16:57:22,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:22,073 INFO L225 Difference]: With dead ends: 330 [2021-06-05 16:57:22,073 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 16:57:22,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 16:57:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 16:57:22,102 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 16:57:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 16:57:22,103 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 16:57:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:22,104 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 16:57:22,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) 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 16:57:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 16:57:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:57:22,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:22,105 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 16:57:22,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:22,334 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:22,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:22,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-06-05 16:57:22,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:22,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598338006] [2021-06-05 16:57:22,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:22,514 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 16:57:22,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:22,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598338006] [2021-06-05 16:57:22,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598338006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:22,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118890690] [2021-06-05 16:57:22,515 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 16:57:22,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:22,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:22,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:57:22,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:22,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:22,696 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 11 treesize of output 15 [2021-06-05 16:57:22,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:57:22,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:22,726 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 16:57:22,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 16:57:22,794 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 16:57:22,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118890690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:22,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:22,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 16:57:22,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350711641] [2021-06-05 16:57:22,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:22,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:22,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:22,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:22,797 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) 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 16:57:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:23,159 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 16:57:23,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:57:23,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) 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 22 [2021-06-05 16:57:23,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:23,163 INFO L225 Difference]: With dead ends: 374 [2021-06-05 16:57:23,163 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 16:57:23,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 357.4ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:57:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 16:57:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 16:57:23,173 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 16:57:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 16:57:23,174 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 16:57:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:23,175 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 16:57:23,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) 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 16:57:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 16:57:23,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:57:23,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:23,177 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 16:57:23,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:23,382 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:23,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-06-05 16:57:23,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:23,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254312573] [2021-06-05 16:57:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:23,530 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 16:57:23,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:23,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254312573] [2021-06-05 16:57:23,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254312573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:23,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453675376] [2021-06-05 16:57:23,530 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 16:57:23,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:57:23,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:23,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:57:23,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:23,661 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 16:57:23,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:23,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:23,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:23,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 16:57:23,692 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 16:57:23,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453675376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:23,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:23,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:57:23,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447584940] [2021-06-05 16:57:23,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:57:23,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:23,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:57:23,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:57:23,694 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) 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 16:57:23,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:23,868 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-06-05 16:57:23,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:57:23,868 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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 22 [2021-06-05 16:57:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:23,870 INFO L225 Difference]: With dead ends: 363 [2021-06-05 16:57:23,870 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 16:57:23,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:57:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 16:57:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-06-05 16:57:23,877 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 16:57:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 16:57:23,878 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 16:57:23,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:23,878 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 16:57:23,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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 16:57:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 16:57:23,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:57:23,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:23,880 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 16:57:24,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:24,098 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:24,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:24,099 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-06-05 16:57:24,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:24,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912519857] [2021-06-05 16:57:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:24,248 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 16:57:24,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:24,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912519857] [2021-06-05 16:57:24,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912519857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:24,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532182149] [2021-06-05 16:57:24,249 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 16:57:24,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:24,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:24,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:57:24,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:24,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:24,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 16:57:24,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:57:24,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:24,414 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 16:57:24,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:19 [2021-06-05 16:57:24,469 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 16:57:24,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532182149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:24,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:24,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:57:24,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877420301] [2021-06-05 16:57:24,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:57:24,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:24,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:57:24,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:57:24,471 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 16:57:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:24,726 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 16:57:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:57:24,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 22 [2021-06-05 16:57:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:24,730 INFO L225 Difference]: With dead ends: 425 [2021-06-05 16:57:24,730 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 16:57:24,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 16:57:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 16:57:24,737 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 16:57:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 16:57:24,738 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 16:57:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:24,740 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 16:57:24,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 16:57:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 16:57:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:24,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:24,742 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 16:57:24,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:24,965 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:24,965 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-06-05 16:57:24,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:24,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13446740] [2021-06-05 16:57:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:25,024 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 16:57:25,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:25,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13446740] [2021-06-05 16:57:25,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13446740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:25,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150100013] [2021-06-05 16:57:25,026 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 16:57:25,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:25,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:25,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:25,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:25,176 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 16:57:25,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150100013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:25,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:25,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:57:25,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226592954] [2021-06-05 16:57:25,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:57:25,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:25,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:57:25,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:57:25,179 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 16:57:25,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:25,590 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 16:57:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:57:25,592 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 16:57:25,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:25,596 INFO L225 Difference]: With dead ends: 619 [2021-06-05 16:57:25,597 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 16:57:25,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:57:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 16:57:25,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 16:57:25,613 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 16:57:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 16:57:25,614 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 16:57:25,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:25,615 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 16:57:25,615 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 16:57:25,615 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 16:57:25,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:25,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:25,616 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 16:57:25,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 16:57:25,838 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:25,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-06-05 16:57:25,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:25,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674370983] [2021-06-05 16:57:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:25,899 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 16:57:25,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:25,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674370983] [2021-06-05 16:57:25,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674370983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:25,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519191407] [2021-06-05 16:57:25,900 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 16:57:25,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:25,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:25,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:26,023 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 16:57:26,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519191407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:26,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:26,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:26,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978840799] [2021-06-05 16:57:26,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:26,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:26,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:26,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:26,024 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 16:57:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:26,836 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 16:57:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:57:26,837 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 16:57:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:26,842 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 16:57:26,842 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 16:57:26,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:57:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 16:57:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 16:57:26,856 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 16:57:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 16:57:26,857 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 16:57:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:26,857 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 16:57:26,857 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 16:57:26,858 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 16:57:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:26,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:26,859 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 16:57:27,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:27,081 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:27,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-06-05 16:57:27,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:27,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988116153] [2021-06-05 16:57:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:27,131 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 16:57:27,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:27,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988116153] [2021-06-05 16:57:27,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988116153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:27,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035581971] [2021-06-05 16:57:27,131 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 16:57:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:27,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:27,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:27,275 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 16:57:27,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035581971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:27,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:27,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:27,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267932362] [2021-06-05 16:57:27,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:27,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:27,277 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 16:57:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:28,003 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 16:57:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:57:28,003 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 16:57:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:28,007 INFO L225 Difference]: With dead ends: 951 [2021-06-05 16:57:28,007 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 16:57:28,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 464.8ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:57:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 16:57:28,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 16:57:28,019 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 16:57:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 16:57:28,020 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 16:57:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:28,020 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 16:57:28,020 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 16:57:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 16:57:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:28,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:28,021 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 16:57:28,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 16:57:28,241 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:28,241 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-06-05 16:57:28,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:28,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586859711] [2021-06-05 16:57:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:28,276 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 16:57:28,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:28,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586859711] [2021-06-05 16:57:28,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586859711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:28,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372710299] [2021-06-05 16:57:28,277 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 16:57:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:28,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:57:28,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:28,363 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 16:57:28,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372710299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:28,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:28,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:57:28,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275202396] [2021-06-05 16:57:28,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:57:28,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:28,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:57:28,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:57:28,365 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 16:57:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:28,498 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 16:57:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:57:28,499 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 16:57:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:28,502 INFO L225 Difference]: With dead ends: 669 [2021-06-05 16:57:28,503 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 16:57:28,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 16:57:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 16:57:28,514 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 16:57:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 16:57:28,515 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 16:57:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:28,516 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 16:57:28,516 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 16:57:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 16:57:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:28,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:28,517 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 16:57:28,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 16:57:28,733 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:28,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:28,734 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-06-05 16:57:28,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:28,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987576939] [2021-06-05 16:57:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:28,808 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 16:57:28,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:28,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987576939] [2021-06-05 16:57:28,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987576939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:28,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419596031] [2021-06-05 16:57:28,809 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 16:57:28,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:28,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:28,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:28,934 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 16:57:28,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419596031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:28,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:28,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:57:28,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749999069] [2021-06-05 16:57:28,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:28,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:28,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:28,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:28,935 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 16:57:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:29,103 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 16:57:29,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:57:29,104 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 16:57:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:29,107 INFO L225 Difference]: With dead ends: 710 [2021-06-05 16:57:29,107 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 16:57:29,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:57:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 16:57:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 16:57:29,121 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 16:57:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 16:57:29,123 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 16:57:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:29,123 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 16:57:29,123 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 16:57:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 16:57:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:29,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:29,124 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 16:57:29,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 16:57:29,341 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:29,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-06-05 16:57:29,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:29,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072355758] [2021-06-05 16:57:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:29,407 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 16:57:29,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:29,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072355758] [2021-06-05 16:57:29,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072355758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:29,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790941915] [2021-06-05 16:57:29,408 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 16:57:29,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:29,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:29,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:57:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:29,507 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 16:57:29,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790941915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:29,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:29,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:57:29,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502435147] [2021-06-05 16:57:29,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:57:29,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:29,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:57:29,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:57:29,509 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 16:57:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:29,613 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 16:57:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:57:29,614 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 16:57:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:29,617 INFO L225 Difference]: With dead ends: 830 [2021-06-05 16:57:29,617 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 16:57:29,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 16:57:29,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 16:57:29,632 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 16:57:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 16:57:29,634 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 16:57:29,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:29,634 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 16:57:29,634 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 16:57:29,634 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 16:57:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:29,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:29,635 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 16:57:29,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 16:57:29,853 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:29,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:29,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-06-05 16:57:29,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:29,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133667701] [2021-06-05 16:57:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:29,905 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 16:57:29,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:29,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133667701] [2021-06-05 16:57:29,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133667701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:29,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044930505] [2021-06-05 16:57:29,906 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 16:57:29,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:57:29,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:29,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:29,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:30,022 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 16:57:30,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044930505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:30,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:30,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:57:30,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542847247] [2021-06-05 16:57:30,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:57:30,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:30,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:57:30,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:57:30,024 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 16:57:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:30,328 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 16:57:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:57:30,329 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 16:57:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:30,334 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 16:57:30,334 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 16:57:30,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:57:30,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 16:57:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 16:57:30,375 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 16:57:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 16:57:30,376 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 16:57:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:30,377 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 16:57:30,377 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 16:57:30,377 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 16:57:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:30,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:30,378 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 16:57:30,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 16:57:30,593 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:30,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-06-05 16:57:30,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:30,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082036843] [2021-06-05 16:57:30,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:30,642 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 16:57:30,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:30,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082036843] [2021-06-05 16:57:30,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082036843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:30,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671759695] [2021-06-05 16:57:30,642 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 16:57:30,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:30,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:30,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:30,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:30,777 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 16:57:30,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671759695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:30,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:30,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:57:30,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591163575] [2021-06-05 16:57:30,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:57:30,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:30,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:57:30,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:57:30,778 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 16:57:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:31,194 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 16:57:31,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:57:31,194 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 16:57:31,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:31,200 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 16:57:31,200 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 16:57:31,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:57:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 16:57:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 16:57:31,221 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 16:57:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 16:57:31,223 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 16:57:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:31,223 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 16:57:31,223 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 16:57:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 16:57:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:31,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:31,225 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 16:57:31,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:31,441 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:31,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:31,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-06-05 16:57:31,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:31,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008945163] [2021-06-05 16:57:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:31,492 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 16:57:31,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:31,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008945163] [2021-06-05 16:57:31,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008945163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:31,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226020398] [2021-06-05 16:57:31,493 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 16:57:31,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:31,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:31,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:31,613 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 16:57:31,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226020398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:31,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:31,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:57:31,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079908117] [2021-06-05 16:57:31,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:31,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:31,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:31,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:31,614 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 16:57:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:31,883 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 16:57:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:57:31,884 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 16:57:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:31,889 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 16:57:31,889 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 16:57:31,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:57:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 16:57:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 16:57:31,908 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 16:57:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 16:57:31,910 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 16:57:31,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:31,910 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 16:57:31,910 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 16:57:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 16:57:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:31,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:31,912 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 16:57:32,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-06-05 16:57:32,133 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-06-05 16:57:32,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:32,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061194752] [2021-06-05 16:57:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:32,174 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 16:57:32,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:32,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061194752] [2021-06-05 16:57:32,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061194752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:32,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519275026] [2021-06-05 16:57:32,174 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 16:57:32,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:32,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:32,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:32,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:32,314 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 16:57:32,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519275026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:32,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:32,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:57:32,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160480668] [2021-06-05 16:57:32,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:32,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:32,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:32,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:32,315 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 16:57:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:32,576 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 16:57:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:57:32,585 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 16:57:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:32,591 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 16:57:32,591 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 16:57:32,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:57:32,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 16:57:32,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 16:57:32,611 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 16:57:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 16:57:32,613 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 16:57:32,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:32,613 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 16:57:32,613 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 16:57:32,614 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 16:57:32,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:32,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:32,615 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 16:57:32,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:32,829 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:32,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-06-05 16:57:32,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:32,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750993079] [2021-06-05 16:57:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:32,875 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 16:57:32,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:32,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750993079] [2021-06-05 16:57:32,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750993079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:32,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629891574] [2021-06-05 16:57:32,875 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 16:57:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:32,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:32,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:32,972 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 16:57:32,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629891574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:32,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:32,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:57:32,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303579723] [2021-06-05 16:57:32,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:57:32,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:32,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:57:32,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:57:32,974 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 16:57:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:33,385 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 16:57:33,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:57:33,385 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 16:57:33,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:33,392 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 16:57:33,392 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 16:57:33,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:57:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 16:57:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 16:57:33,421 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 16:57:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 16:57:33,423 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 16:57:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:33,424 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 16:57:33,424 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 16:57:33,424 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 16:57:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:33,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:33,426 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 16:57:33,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 16:57:33,648 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:33,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-06-05 16:57:33,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:33,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856182166] [2021-06-05 16:57:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:33,693 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 16:57:33,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856182166] [2021-06-05 16:57:33,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856182166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589300465] [2021-06-05 16:57:33,694 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 16:57:33,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:33,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:33,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:33,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:33,819 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 16:57:33,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589300465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:33,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:33,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:33,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252225636] [2021-06-05 16:57:33,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:33,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:33,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:33,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:33,820 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 16:57:34,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:34,534 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 16:57:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:57:34,535 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 16:57:34,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:34,546 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 16:57:34,546 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 16:57:34,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 454.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:57:34,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 16:57:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 16:57:34,583 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 16:57:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 16:57:34,585 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 16:57:34,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:34,585 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 16:57:34,585 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 16:57:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 16:57:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:34,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:34,588 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 16:57:34,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:34,801 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:34,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-06-05 16:57:34,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:34,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839094434] [2021-06-05 16:57:34,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:34,839 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 16:57:34,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:34,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839094434] [2021-06-05 16:57:34,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839094434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:34,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416277387] [2021-06-05 16:57:34,839 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 16:57:34,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:57:34,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:34,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:34,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:34,959 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 16:57:34,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416277387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:34,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:34,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:34,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426488402] [2021-06-05 16:57:34,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:34,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:34,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:34,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:34,960 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 16:57:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:35,706 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 16:57:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:57:35,706 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 16:57:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:35,713 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 16:57:35,713 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 16:57:35,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:57:35,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 16:57:35,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 16:57:35,746 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 16:57:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 16:57:35,748 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 16:57:35,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:35,748 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 16:57:35,749 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 16:57:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 16:57:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:35,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:35,751 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 16:57:35,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 16:57:35,973 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-06-05 16:57:35,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:35,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784742027] [2021-06-05 16:57:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:36,023 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 16:57:36,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:36,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784742027] [2021-06-05 16:57:36,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784742027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:36,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774100639] [2021-06-05 16:57:36,024 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 16:57:36,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:36,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:36,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:36,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:36,126 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 16:57:36,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774100639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:36,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:36,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:57:36,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831968367] [2021-06-05 16:57:36,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:57:36,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:36,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:57:36,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:57:36,127 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 16:57:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:36,714 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 16:57:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:57:36,715 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 16:57:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:36,721 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 16:57:36,721 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 16:57:36,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:57:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 16:57:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 16:57:36,752 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 16:57:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 16:57:36,754 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 16:57:36,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:36,754 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 16:57:36,755 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 16:57:36,755 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 16:57:36,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:36,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:36,757 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 16:57:36,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 16:57:36,973 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:36,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-06-05 16:57:36,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:36,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873520606] [2021-06-05 16:57:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:37,058 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 16:57:37,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873520606] [2021-06-05 16:57:37,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873520606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920224634] [2021-06-05 16:57:37,058 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 16:57:37,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:57:37,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:37,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:37,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:37,182 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 16:57:37,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920224634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:37,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:37,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:57:37,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771608112] [2021-06-05 16:57:37,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:57:37,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:37,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:57:37,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:57:37,183 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 16:57:37,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:37,786 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 16:57:37,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:57:37,787 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 16:57:37,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:37,791 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 16:57:37,791 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 16:57:37,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:57:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 16:57:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 16:57:37,821 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 16:57:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 16:57:37,823 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 16:57:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:37,824 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 16:57:37,824 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 16:57:37,824 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 16:57:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:37,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:37,826 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 16:57:38,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 16:57:38,051 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:38,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-06-05 16:57:38,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:38,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753233943] [2021-06-05 16:57:38,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:38,102 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 16:57:38,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:38,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753233943] [2021-06-05 16:57:38,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753233943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:38,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910545909] [2021-06-05 16:57:38,102 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 16:57:38,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:57:38,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:38,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:38,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:38,222 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 16:57:38,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910545909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:38,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:38,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:38,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759754378] [2021-06-05 16:57:38,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:38,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:38,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:38,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:38,224 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:38,866 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 16:57:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:57:38,867 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:38,873 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 16:57:38,873 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 16:57:38,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:57:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 16:57:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 16:57:38,919 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 16:57:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 16:57:38,922 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 16:57:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:38,923 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 16:57:38,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 16:57:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:38,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:38,925 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 16:57:39,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 16:57:39,145 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:39,145 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-06-05 16:57:39,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:39,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334638095] [2021-06-05 16:57:39,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:39,191 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 16:57:39,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:39,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334638095] [2021-06-05 16:57:39,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334638095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:39,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118233060] [2021-06-05 16:57:39,191 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 16:57:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:39,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:39,317 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 16:57:39,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118233060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:39,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:39,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:39,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368028415] [2021-06-05 16:57:39,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:39,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:39,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:39,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:39,319 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:40,021 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 16:57:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:57:40,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:40,028 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 16:57:40,028 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 16:57:40,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:57:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 16:57:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 16:57:40,057 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 16:57:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 16:57:40,060 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 16:57:40,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:40,060 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 16:57:40,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:40,060 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 16:57:40,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:40,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:40,062 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 16:57:40,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 16:57:40,285 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:40,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:40,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-06-05 16:57:40,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:40,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649801166] [2021-06-05 16:57:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:40,313 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 16:57:40,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:40,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649801166] [2021-06-05 16:57:40,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649801166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:40,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667293155] [2021-06-05 16:57:40,314 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 16:57:40,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:57:40,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:40,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:57:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:40,389 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 16:57:40,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667293155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:40,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:40,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:57:40,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999160339] [2021-06-05 16:57:40,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:57:40,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:40,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:57:40,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:57:40,390 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 16:57:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:40,469 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 16:57:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:57:40,470 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 16:57:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:40,472 INFO L225 Difference]: With dead ends: 929 [2021-06-05 16:57:40,472 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 16:57:40,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:57:40,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 16:57:40,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 16:57:40,485 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 16:57:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 16:57:40,487 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 16:57:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:40,487 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 16:57:40,487 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 16:57:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 16:57:40,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:40,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:40,489 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 16:57:40,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:40,711 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:40,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-06-05 16:57:40,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:40,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180968546] [2021-06-05 16:57:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:40,747 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 16:57:40,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:40,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180968546] [2021-06-05 16:57:40,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180968546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:40,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804638835] [2021-06-05 16:57:40,748 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 16:57:40,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:40,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:40,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:40,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:40,842 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 16:57:40,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804638835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:40,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:40,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:57:40,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028478419] [2021-06-05 16:57:40,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:57:40,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:40,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:57:40,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:57:40,843 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 16:57:41,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:41,195 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 16:57:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:57:41,195 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 16:57:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:41,203 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 16:57:41,203 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 16:57:41,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:57:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 16:57:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 16:57:41,230 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 16:57:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 16:57:41,233 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 16:57:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:41,233 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 16:57:41,233 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 16:57:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 16:57:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:41,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:41,235 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 16:57:41,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:41,458 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:41,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-06-05 16:57:41,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:41,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537922044] [2021-06-05 16:57:41,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:41,485 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 16:57:41,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:41,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537922044] [2021-06-05 16:57:41,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537922044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:41,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512845551] [2021-06-05 16:57:41,486 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 16:57:41,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:57:41,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:41,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:41,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:41,562 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 16:57:41,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512845551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:41,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:41,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:57:41,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351932323] [2021-06-05 16:57:41,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:57:41,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:41,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:57:41,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:57:41,564 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 16:57:41,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:41,813 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 16:57:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:57:41,814 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 16:57:41,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:41,816 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 16:57:41,816 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 16:57:41,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:57:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 16:57:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 16:57:41,834 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 16:57:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 16:57:41,836 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 16:57:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:41,837 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 16:57:41,837 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 16:57:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 16:57:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:41,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:41,839 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 16:57:42,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:42,061 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-06-05 16:57:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:42,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393069155] [2021-06-05 16:57:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:42,091 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 16:57:42,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:42,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393069155] [2021-06-05 16:57:42,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393069155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:42,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070991623] [2021-06-05 16:57:42,091 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) [2021-06-05 16:57:42,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:42,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:42,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:42,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:42,175 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 16:57:42,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070991623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:42,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:42,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:57:42,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627490944] [2021-06-05 16:57:42,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:57:42,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:42,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:57:42,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:57:42,176 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 16:57:42,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:42,381 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 16:57:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:57:42,381 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 16:57:42,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:42,384 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 16:57:42,385 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 16:57:42,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:57:42,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 16:57:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 16:57:42,402 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 16:57:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 16:57:42,404 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 16:57:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:42,404 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 16:57:42,404 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 16:57:42,405 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 16:57:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:42,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:42,406 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 16:57:42,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 16:57:42,620 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:42,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:42,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-06-05 16:57:42,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:42,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110476109] [2021-06-05 16:57:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:42,657 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 16:57:42,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:42,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110476109] [2021-06-05 16:57:42,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110476109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:42,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717790117] [2021-06-05 16:57:42,658 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 16:57:42,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:42,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:42,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:42,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:42,761 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 16:57:42,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717790117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:42,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:42,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:57:42,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759403038] [2021-06-05 16:57:42,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:57:42,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:42,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:57:42,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:57:42,763 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 16:57:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:43,031 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 16:57:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:57:43,031 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 16:57:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:43,041 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 16:57:43,041 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 16:57:43,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:57:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 16:57:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 16:57:43,059 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 16:57:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 16:57:43,061 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 16:57:43,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:43,061 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 16:57:43,061 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 16:57:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 16:57:43,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:43,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:43,063 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 16:57:43,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:43,285 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:43,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-06-05 16:57:43,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:43,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975372895] [2021-06-05 16:57:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:43,323 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 16:57:43,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:43,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975372895] [2021-06-05 16:57:43,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975372895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:43,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183239174] [2021-06-05 16:57:43,324 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 16:57:43,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:43,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:43,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:43,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:43,433 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 16:57:43,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183239174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:43,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:43,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:43,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107835845] [2021-06-05 16:57:43,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:43,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:43,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:43,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:43,434 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 16:57:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:43,911 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 16:57:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:57:43,911 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 16:57:43,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:43,915 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 16:57:43,915 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 16:57:43,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:57:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 16:57:43,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 16:57:43,937 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 16:57:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 16:57:43,940 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 16:57:43,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:43,940 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 16:57:43,940 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 16:57:43,940 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 16:57:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:43,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:43,944 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 16:57:44,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 16:57:44,167 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:44,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:44,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-06-05 16:57:44,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:44,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287661813] [2021-06-05 16:57:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:44,201 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 16:57:44,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287661813] [2021-06-05 16:57:44,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287661813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111347176] [2021-06-05 16:57:44,202 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 16:57:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:44,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:44,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:44,316 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 16:57:44,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111347176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:44,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:44,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:44,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14734496] [2021-06-05 16:57:44,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:44,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:44,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:44,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:44,318 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 16:57:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:44,779 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 16:57:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:57:44,779 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 16:57:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:44,782 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 16:57:44,782 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 16:57:44,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 325.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:57:44,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 16:57:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 16:57:44,800 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 16:57:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:57:44,802 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:57:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:44,803 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:57:44,803 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 16:57:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:57:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:44,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:44,805 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 16:57:45,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:45,027 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:45,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:45,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-06-05 16:57:45,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:45,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947552378] [2021-06-05 16:57:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:45,060 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 16:57:45,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:45,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947552378] [2021-06-05 16:57:45,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947552378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:45,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117917274] [2021-06-05 16:57:45,061 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 16:57:45,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:45,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:45,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:45,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:45,163 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 16:57:45,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117917274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:45,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:45,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:57:45,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523989579] [2021-06-05 16:57:45,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:57:45,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:45,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:57:45,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:57:45,164 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 16:57:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:45,566 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 16:57:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:57:45,567 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 16:57:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:45,570 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 16:57:45,570 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 16:57:45,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:57:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 16:57:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 16:57:45,586 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 16:57:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:57:45,588 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:57:45,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:45,589 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:57:45,589 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 16:57:45,589 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:57:45,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:45,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:45,591 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 16:57:45,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 16:57:45,812 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:45,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-06-05 16:57:45,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:45,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761004956] [2021-06-05 16:57:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:45,849 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 16:57:45,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:45,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761004956] [2021-06-05 16:57:45,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761004956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:45,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693557589] [2021-06-05 16:57:45,849 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 16:57:45,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:57:45,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:45,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:45,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:45,941 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 16:57:45,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693557589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:45,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:45,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:57:45,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439687953] [2021-06-05 16:57:45,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:57:45,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:45,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:57:45,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:57:45,942 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 16:57:46,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:46,278 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 16:57:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:57:46,278 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 16:57:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:46,281 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 16:57:46,281 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 16:57:46,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:57:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 16:57:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 16:57:46,316 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 16:57:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:57:46,318 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:57:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:46,318 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:57:46,319 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 16:57:46,319 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:57:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:46,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:46,320 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] [2021-06-05 16:57:46,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:46,543 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:46,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:46,543 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-06-05 16:57:46,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:46,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543482120] [2021-06-05 16:57:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:46,578 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 16:57:46,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:46,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543482120] [2021-06-05 16:57:46,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543482120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:46,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628592928] [2021-06-05 16:57:46,579 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 16:57:46,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:46,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:46,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:46,706 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 16:57:46,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628592928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:46,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:46,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:46,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404602622] [2021-06-05 16:57:46,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:46,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:46,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:46,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:46,707 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:47,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:47,060 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 16:57:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:57:47,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:47,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:47,063 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 16:57:47,063 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 16:57:47,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:47,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 16:57:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 16:57:47,078 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 16:57:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:57:47,080 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:57:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:47,081 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:57:47,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:57:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:47,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:47,082 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 16:57:47,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 16:57:47,283 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:47,283 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-06-05 16:57:47,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:47,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313458954] [2021-06-05 16:57:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:47,319 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 16:57:47,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:47,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313458954] [2021-06-05 16:57:47,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313458954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:47,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990274223] [2021-06-05 16:57:47,320 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 16:57:47,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:47,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:47,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:47,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:47,416 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 16:57:47,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990274223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:47,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:47,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:47,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887855287] [2021-06-05 16:57:47,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:47,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:47,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:47,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:47,417 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:47,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:47,762 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 16:57:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:57:47,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:47,765 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 16:57:47,765 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 16:57:47,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:57:47,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 16:57:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 16:57:47,784 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 16:57:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:57:47,787 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:57:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:47,787 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:57:47,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:47,787 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:57:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:47,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:47,789 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 16:57:48,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 16:57:48,006 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:48,007 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-06-05 16:57:48,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:48,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885423966] [2021-06-05 16:57:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:48,042 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 16:57:48,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:48,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885423966] [2021-06-05 16:57:48,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885423966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:48,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582091235] [2021-06-05 16:57:48,043 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 16:57:48,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:48,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:48,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:48,149 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 16:57:48,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582091235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:48,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:48,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:57:48,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172640340] [2021-06-05 16:57:48,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:57:48,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:48,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:57:48,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:57:48,151 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 16:57:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:48,535 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 16:57:48,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:57:48,535 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 16:57:48,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:48,537 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 16:57:48,538 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 16:57:48,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:57:48,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 16:57:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 16:57:48,557 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 16:57:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 16:57:48,559 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 16:57:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:48,559 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 16:57:48,559 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 16:57:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 16:57:48,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:48,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:48,562 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 16:57:48,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 16:57:48,769 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:48,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:48,769 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-06-05 16:57:48,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:48,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123638201] [2021-06-05 16:57:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:48,809 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 16:57:48,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:48,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123638201] [2021-06-05 16:57:48,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123638201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:48,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194251310] [2021-06-05 16:57:48,810 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 16:57:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:48,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:48,892 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 16:57:48,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194251310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:48,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:48,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:57:48,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930249246] [2021-06-05 16:57:48,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:57:48,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:48,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:57:48,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:57:48,893 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 16:57:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:49,148 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 16:57:49,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:49,148 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 16:57:49,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:49,151 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 16:57:49,151 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 16:57:49,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:57:49,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 16:57:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 16:57:49,170 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 16:57:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 16:57:49,172 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 16:57:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:49,172 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 16:57:49,172 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 16:57:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 16:57:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:49,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:49,174 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 16:57:49,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 16:57:49,389 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-06-05 16:57:49,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:49,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376541675] [2021-06-05 16:57:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:49,418 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 16:57:49,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:49,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376541675] [2021-06-05 16:57:49,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376541675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:49,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289586216] [2021-06-05 16:57:49,419 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 16:57:49,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:57:49,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:49,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:49,506 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 16:57:49,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289586216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:49,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:49,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:57:49,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378551815] [2021-06-05 16:57:49,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:57:49,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:57:49,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:57:49,507 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 16:57:49,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:49,717 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 16:57:49,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:57:49,717 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 16:57:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:49,719 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 16:57:49,719 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 16:57:49,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:57:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 16:57:49,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 16:57:49,732 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 16:57:49,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 16:57:49,734 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 16:57:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:49,734 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 16:57:49,734 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 16:57:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 16:57:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:49,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:49,736 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 16:57:49,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:49,937 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:49,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:49,937 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-06-05 16:57:49,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:49,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169667879] [2021-06-05 16:57:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:49,971 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 16:57:49,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:49,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169667879] [2021-06-05 16:57:49,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169667879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:49,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886318187] [2021-06-05 16:57:49,971 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 16:57:49,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:57:49,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:49,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:49,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:50,068 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 16:57:50,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886318187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:50,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:50,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:50,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270514826] [2021-06-05 16:57:50,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:50,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:50,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:50,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:50,072 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:50,409 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 16:57:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:57:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:50,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:50,412 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 16:57:50,412 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 16:57:50,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:57:50,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 16:57:50,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 16:57:50,426 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 16:57:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 16:57:50,429 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 16:57:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:50,429 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 16:57:50,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 16:57:50,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:50,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:50,432 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 16:57:50,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 16:57:50,645 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-06-05 16:57:50,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:50,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22749033] [2021-06-05 16:57:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:50,681 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 16:57:50,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:50,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22749033] [2021-06-05 16:57:50,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22749033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:50,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871193293] [2021-06-05 16:57:50,682 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 16:57:50,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:50,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:50,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:50,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:50,802 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 16:57:50,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871193293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:50,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:50,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:57:50,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860571965] [2021-06-05 16:57:50,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:57:50,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:50,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:57:50,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:57:50,803 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:51,089 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 16:57:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:57:51,089 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:51,092 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 16:57:51,092 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 16:57:51,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:57:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 16:57:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 16:57:51,105 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 16:57:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 16:57:51,106 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 16:57:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:51,107 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 16:57:51,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 16:57:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 16:57:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:57:51,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:51,108 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 16:57:51,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 16:57:51,309 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:51,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:51,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-06-05 16:57:51,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:51,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752752200] [2021-06-05 16:57:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:51,345 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 16:57:51,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:51,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752752200] [2021-06-05 16:57:51,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752752200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:51,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543663110] [2021-06-05 16:57:51,345 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 16:57:51,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:51,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:51,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:57:51,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:51,423 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 16:57:51,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543663110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:51,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:51,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:57:51,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552875196] [2021-06-05 16:57:51,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:57:51,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:51,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:57:51,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:57:51,424 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 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 16:57:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:51,576 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 16:57:51,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:57:51,576 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 16:57:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:51,578 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 16:57:51,578 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 16:57:51,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:57:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 16:57:51,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 16:57:51,590 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 16:57:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 16:57:51,593 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 16:57:51,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:51,593 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 16:57:51,593 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 16:57:51,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 16:57:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:51,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:51,595 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 16:57:51,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:51,809 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-06-05 16:57:51,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:51,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080265852] [2021-06-05 16:57:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:52,053 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 16:57:52,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:52,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080265852] [2021-06-05 16:57:52,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080265852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:52,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962592070] [2021-06-05 16:57:52,053 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 16:57:52,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:57:52,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:52,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:57:52,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:52,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:52,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:52,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-06-05 16:57:52,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:52,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:52,279 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 16:57:52,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:57:52,306 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 16:57:52,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962592070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:52,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:52,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:57:52,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013556558] [2021-06-05 16:57:52,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:57:52,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:52,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:57:52,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:57:52,307 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 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 16:57:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:52,799 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 16:57:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:57:52,799 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 26 [2021-06-05 16:57:52,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:52,801 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 16:57:52,801 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 16:57:52,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 526.3ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:57:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 16:57:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 16:57:52,812 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 16:57:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 16:57:52,814 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 16:57:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:52,815 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 16:57:52,815 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 16:57:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 16:57:52,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:52,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:52,816 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 16:57:53,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 16:57:53,017 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:53,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:53,018 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-06-05 16:57:53,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:53,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909287892] [2021-06-05 16:57:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:53,232 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 16:57:53,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:53,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909287892] [2021-06-05 16:57:53,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909287892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:53,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686321085] [2021-06-05 16:57:53,232 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 16:57:53,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:57:53,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:53,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:57:53,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:53,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:53,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:53,485 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 19 treesize of output 11 [2021-06-05 16:57:53,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:53,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:53,491 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 16:57:53,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:57:53,510 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 16:57:53,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686321085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:53,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:53,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:57:53,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602948750] [2021-06-05 16:57:53,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:57:53,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:53,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:57:53,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:57:53,511 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 16:57:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:54,388 INFO L93 Difference]: Finished difference Result 1498 states and 4907 transitions. [2021-06-05 16:57:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:57:54,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 16:57:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:54,390 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 16:57:54,390 INFO L226 Difference]: Without dead ends: 1483 [2021-06-05 16:57:54,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 857.9ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:57:54,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-06-05 16:57:54,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1150. [2021-06-05 16:57:54,402 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 16:57:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 16:57:54,404 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 16:57:54,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:54,405 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 16:57:54,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 16:57:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 16:57:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:54,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:54,407 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 16:57:54,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:57:54,607 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:54,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-06-05 16:57:54,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:54,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706749167] [2021-06-05 16:57:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:54,934 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 16:57:54,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706749167] [2021-06-05 16:57:54,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706749167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:54,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2343783] [2021-06-05 16:57:54,935 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 16:57:54,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:54,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:54,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:57:54,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:55,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:55,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:55,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:55,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:55,128 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 21 treesize of output 11 [2021-06-05 16:57:55,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:55,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:55,134 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 16:57:55,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:57:55,152 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 16:57:55,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2343783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:55,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:55,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:57:55,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181393160] [2021-06-05 16:57:55,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:55,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:55,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:55,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:55,153 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 16:57:56,652 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-06-05 16:57:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:57,031 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-06-05 16:57:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:57:57,031 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 16:57:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:57,033 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 16:57:57,033 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 16:57:57,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1878.3ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:57:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 16:57:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-06-05 16:57:57,046 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 16:57:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 16:57:57,048 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 16:57:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:57,048 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 16:57:57,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 16:57:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 16:57:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:57,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:57,050 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 16:57:57,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 16:57:57,250 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:57,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-06-05 16:57:57,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:57,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057920481] [2021-06-05 16:57:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:57,477 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 16:57:57,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:57,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057920481] [2021-06-05 16:57:57,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057920481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:57,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008772289] [2021-06-05 16:57:57,478 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 16:57:57,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:57:57,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:57:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:57:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:57,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:57,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:57,637 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 19 treesize of output 19 [2021-06-05 16:57:57,639 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:57:57,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:57,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:57:57,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 16:57:57,689 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 16:57:57,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008772289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:57,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:57,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:57:57,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178496186] [2021-06-05 16:57:57,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:57,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:57,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:57,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:57,690 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 16:57:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:57:59,143 INFO L93 Difference]: Finished difference Result 1879 states and 5975 transitions. [2021-06-05 16:57:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:57:59,143 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 16:57:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:57:59,145 INFO L225 Difference]: With dead ends: 1879 [2021-06-05 16:57:59,145 INFO L226 Difference]: Without dead ends: 1864 [2021-06-05 16:57:59,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1185.8ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:57:59,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-06-05 16:57:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1198. [2021-06-05 16:57:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:57:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-06-05 16:57:59,161 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-06-05 16:57:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:57:59,162 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-06-05 16:57:59,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 16:57:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-06-05 16:57:59,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:57:59,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:57:59,163 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 16:57:59,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 16:57:59,364 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:57:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:57:59,364 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-06-05 16:57:59,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:57:59,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988384457] [2021-06-05 16:57:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:57:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:59,652 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 16:57:59,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:57:59,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988384457] [2021-06-05 16:57:59,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988384457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:59,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000467967] [2021-06-05 16:57:59,652 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 16:57:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:57:59,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:57:59,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:57:59,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:59,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:57:59,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:59,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:57:59,887 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 21 treesize of output 11 [2021-06-05 16:57:59,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:57:59,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:57:59,893 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 16:57:59,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:57:59,912 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 16:57:59,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000467967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:57:59,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:57:59,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:57:59,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522756691] [2021-06-05 16:57:59,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:57:59,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:57:59,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:57:59,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:57:59,913 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 16:58:00,279 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-06-05 16:58:00,557 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-05 16:58:01,651 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 16:58:01,928 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-06-05 16:58:02,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:02,355 INFO L93 Difference]: Finished difference Result 1869 states and 5964 transitions. [2021-06-05 16:58:02,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:58:02,357 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 16:58:02,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:02,359 INFO L225 Difference]: With dead ends: 1869 [2021-06-05 16:58:02,359 INFO L226 Difference]: Without dead ends: 1854 [2021-06-05 16:58:02,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 2287.0ms TimeCoverageRelationStatistics Valid=468, Invalid=2184, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:58:02,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-06-05 16:58:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1206. [2021-06-05 16:58:02,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-06-05 16:58:02,377 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-06-05 16:58:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:02,377 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-06-05 16:58:02,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 16:58:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-06-05 16:58:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:02,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:02,379 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 16:58:02,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:02,579 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:02,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-06-05 16:58:02,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:02,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144889807] [2021-06-05 16:58:02,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:02,817 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 16:58:02,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:02,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144889807] [2021-06-05 16:58:02,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144889807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:02,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22283434] [2021-06-05 16:58:02,817 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 16:58:02,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:02,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:02,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:02,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:03,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:03,159 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 19 treesize of output 59 [2021-06-05 16:58:03,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:03,560 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 16:58:03,561 INFO L628 ElimStorePlain]: treesize reduction 131, result has 54.2 percent of original size [2021-06-05 16:58:03,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:03,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:692 [2021-06-05 16:58:04,150 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-06-05 16:58:04,354 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-06-05 16:58:04,402 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 16:58:04,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22283434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:04,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:04,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 16:58:04,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421933259] [2021-06-05 16:58:04,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:58:04,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:04,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:58:04,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:58:04,403 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 16:58:05,959 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 49 [2021-06-05 16:58:06,573 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 16:58:06,848 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-06-05 16:58:07,020 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-06-05 16:58:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:07,061 INFO L93 Difference]: Finished difference Result 2129 states and 6755 transitions. [2021-06-05 16:58:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:58:07,061 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 16:58:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:07,064 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 16:58:07,064 INFO L226 Difference]: Without dead ends: 2114 [2021-06-05 16:58:07,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2827.5ms TimeCoverageRelationStatistics Valid=373, Invalid=2177, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:58:07,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-06-05 16:58:07,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1219. [2021-06-05 16:58:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-06-05 16:58:07,081 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-06-05 16:58:07,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:07,081 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-06-05 16:58:07,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 16:58:07,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-06-05 16:58:07,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:07,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:07,083 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 16:58:07,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 16:58:07,283 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:07,284 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-06-05 16:58:07,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:07,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615638721] [2021-06-05 16:58:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:07,482 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 16:58:07,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:07,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615638721] [2021-06-05 16:58:07,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615638721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:07,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906211067] [2021-06-05 16:58:07,482 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 16:58:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:07,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:58:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:07,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:07,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:07,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-06-05 16:58:07,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:07,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:07,708 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 16:58:07,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:58:07,723 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 16:58:07,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906211067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:07,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:07,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:07,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166078781] [2021-06-05 16:58:07,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:07,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:07,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:07,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:07,725 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 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 16:58:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:08,283 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-06-05 16:58:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:58:08,283 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 26 [2021-06-05 16:58:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:08,285 INFO L225 Difference]: With dead ends: 1622 [2021-06-05 16:58:08,285 INFO L226 Difference]: Without dead ends: 1607 [2021-06-05 16:58:08,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 565.8ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:58:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-06-05 16:58:08,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-06-05 16:58:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:08,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-06-05 16:58:08,301 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-06-05 16:58:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:08,301 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-06-05 16:58:08,301 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 16:58:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-06-05 16:58:08,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:08,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:08,303 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 16:58:08,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:08,516 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:08,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:08,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-06-05 16:58:08,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:08,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814111388] [2021-06-05 16:58:08,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:08,715 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 16:58:08,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:08,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814111388] [2021-06-05 16:58:08,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814111388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:08,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259732800] [2021-06-05 16:58:08,716 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 16:58:08,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:08,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:08,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:58:08,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:08,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:08,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:08,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-06-05 16:58:08,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:08,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:08,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:08,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:117 [2021-06-05 16:58:09,176 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 16:58:09,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259732800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:09,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:09,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:58:09,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825270093] [2021-06-05 16:58:09,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:09,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:09,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:09,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:09,177 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:58:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:11,215 INFO L93 Difference]: Finished difference Result 1952 states and 6191 transitions. [2021-06-05 16:58:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:58:11,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:58:11,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:11,218 INFO L225 Difference]: With dead ends: 1952 [2021-06-05 16:58:11,218 INFO L226 Difference]: Without dead ends: 1937 [2021-06-05 16:58:11,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1865.7ms TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:58:11,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-05 16:58:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1241. [2021-06-05 16:58:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.356451612903226) internal successors, (4162), 1240 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4162 transitions. [2021-06-05 16:58:11,236 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4162 transitions. Word has length 26 [2021-06-05 16:58:11,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:11,236 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4162 transitions. [2021-06-05 16:58:11,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:58:11,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4162 transitions. [2021-06-05 16:58:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:11,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:11,238 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 16:58:11,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 16:58:11,438 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:11,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-06-05 16:58:11,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:11,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016720765] [2021-06-05 16:58:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:11,643 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 16:58:11,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:11,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016720765] [2021-06-05 16:58:11,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016720765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:11,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835681165] [2021-06-05 16:58:11,643 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 16:58:11,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:11,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:11,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:58:11,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:11,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:11,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:11,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-06-05 16:58:11,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:11,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:11,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:11,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:3 [2021-06-05 16:58:11,899 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 16:58:11,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835681165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:11,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:11,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:11,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594676257] [2021-06-05 16:58:11,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:11,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:11,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:11,900 INFO L87 Difference]: Start difference. First operand 1241 states and 4162 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 16:58:12,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:12,815 INFO L93 Difference]: Finished difference Result 1876 states and 6095 transitions. [2021-06-05 16:58:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:58:12,816 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 26 [2021-06-05 16:58:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:12,818 INFO L225 Difference]: With dead ends: 1876 [2021-06-05 16:58:12,818 INFO L226 Difference]: Without dead ends: 1861 [2021-06-05 16:58:12,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 727.3ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:12,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-06-05 16:58:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1250. [2021-06-05 16:58:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.3610888710968774) internal successors, (4198), 1249 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:12,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4198 transitions. [2021-06-05 16:58:12,835 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4198 transitions. Word has length 26 [2021-06-05 16:58:12,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:12,835 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 4198 transitions. [2021-06-05 16:58:12,835 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 16:58:12,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4198 transitions. [2021-06-05 16:58:12,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:12,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:12,837 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 16:58:13,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:13,037 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:13,037 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-06-05 16:58:13,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:13,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132467599] [2021-06-05 16:58:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:13,255 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 16:58:13,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:13,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132467599] [2021-06-05 16:58:13,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132467599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:13,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604628166] [2021-06-05 16:58:13,256 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 16:58:13,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:13,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:13,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:13,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:13,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:13,474 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 19 treesize of output 11 [2021-06-05 16:58:13,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:13,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:13,480 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 16:58:13,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:58:13,502 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 16:58:13,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604628166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:13,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:13,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:58:13,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050670214] [2021-06-05 16:58:13,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:13,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:13,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:13,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:13,504 INFO L87 Difference]: Start difference. First operand 1250 states and 4198 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) 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 16:58:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:14,919 INFO L93 Difference]: Finished difference Result 2069 states and 6711 transitions. [2021-06-05 16:58:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:58:14,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) 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 16:58:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:14,922 INFO L225 Difference]: With dead ends: 2069 [2021-06-05 16:58:14,922 INFO L226 Difference]: Without dead ends: 2054 [2021-06-05 16:58:14,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1296.5ms TimeCoverageRelationStatistics Valid=370, Invalid=1522, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:58:14,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-06-05 16:58:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1246. [2021-06-05 16:58:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-06-05 16:58:14,940 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-06-05 16:58:14,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:14,941 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-06-05 16:58:14,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) 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 16:58:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-06-05 16:58:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:14,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:14,942 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, 1, 1] [2021-06-05 16:58:15,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 16:58:15,143 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:15,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:15,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 11 times [2021-06-05 16:58:15,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:15,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018232518] [2021-06-05 16:58:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:15,324 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 16:58:15,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:15,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018232518] [2021-06-05 16:58:15,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018232518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:15,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357442254] [2021-06-05 16:58:15,324 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 16:58:15,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:58:15,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:15,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:15,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:15,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:15,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:15,560 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 19 treesize of output 11 [2021-06-05 16:58:15,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:15,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:15,566 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 16:58:15,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:58:15,586 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 16:58:15,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357442254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:15,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:15,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:58:15,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223323662] [2021-06-05 16:58:15,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:15,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:15,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:15,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:15,588 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 16:58:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:16,993 INFO L93 Difference]: Finished difference Result 1790 states and 5829 transitions. [2021-06-05 16:58:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:58:16,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 16:58:16,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:16,996 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 16:58:16,996 INFO L226 Difference]: Without dead ends: 1775 [2021-06-05 16:58:16,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1085.8ms TimeCoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:58:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-06-05 16:58:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1249. [2021-06-05 16:58:17,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 3.3621794871794872) internal successors, (4196), 1248 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4196 transitions. [2021-06-05 16:58:17,013 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4196 transitions. Word has length 26 [2021-06-05 16:58:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:17,013 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 4196 transitions. [2021-06-05 16:58:17,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 16:58:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4196 transitions. [2021-06-05 16:58:17,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:17,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:17,015 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 16:58:17,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 16:58:17,215 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:17,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1617260987, now seen corresponding path program 12 times [2021-06-05 16:58:17,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:17,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841036439] [2021-06-05 16:58:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:17,439 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 16:58:17,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:17,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841036439] [2021-06-05 16:58:17,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841036439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:17,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205021497] [2021-06-05 16:58:17,439 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 16:58:17,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:58:17,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:17,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:58:17,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:17,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:17,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:17,591 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 19 treesize of output 19 [2021-06-05 16:58:17,592 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:58:17,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:17,601 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 16:58:17,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 16:58:17,642 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 16:58:17,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205021497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:17,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:17,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:17,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669970273] [2021-06-05 16:58:17,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:17,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:17,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:17,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:17,643 INFO L87 Difference]: Start difference. First operand 1249 states and 4196 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:58:18,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:18,855 INFO L93 Difference]: Finished difference Result 2008 states and 6519 transitions. [2021-06-05 16:58:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:58:18,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 16:58:18,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:18,858 INFO L225 Difference]: With dead ends: 2008 [2021-06-05 16:58:18,858 INFO L226 Difference]: Without dead ends: 1993 [2021-06-05 16:58:18,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1011.7ms TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:58:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-06-05 16:58:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1246. [2021-06-05 16:58:18,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-06-05 16:58:18,876 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-06-05 16:58:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:18,876 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-06-05 16:58:18,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:58:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-06-05 16:58:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:18,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:18,879 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 16:58:19,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:19,095 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:19,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:19,095 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-06-05 16:58:19,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:19,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205039470] [2021-06-05 16:58:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:19,319 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 16:58:19,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:19,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205039470] [2021-06-05 16:58:19,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205039470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:19,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584497354] [2021-06-05 16:58:19,320 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 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 16:58:19,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:19,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:19,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:58:19,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:19,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:19,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:19,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:19,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:19,497 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 21 treesize of output 11 [2021-06-05 16:58:19,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:19,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:19,504 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 16:58:19,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:58:19,528 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 16:58:19,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584497354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:19,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:19,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:58:19,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621723300] [2021-06-05 16:58:19,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:19,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:19,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:19,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:19,529 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:58:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:21,488 INFO L93 Difference]: Finished difference Result 2877 states and 8904 transitions. [2021-06-05 16:58:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:58:21,488 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 16:58:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:21,492 INFO L225 Difference]: With dead ends: 2877 [2021-06-05 16:58:21,492 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 16:58:21,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1527.3ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:58:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 16:58:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1292. [2021-06-05 16:58:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-06-05 16:58:21,512 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-06-05 16:58:21,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:21,512 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-06-05 16:58:21,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:58:21,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-06-05 16:58:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:21,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:21,514 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 16:58:21,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 16:58:21,714 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:21,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:21,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-06-05 16:58:21,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:21,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359940784] [2021-06-05 16:58:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:21,925 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 16:58:21,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:21,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359940784] [2021-06-05 16:58:21,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359940784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:21,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235260321] [2021-06-05 16:58:21,926 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 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 16:58:21,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:21,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:21,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:58:21,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:22,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:22,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:22,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:22,080 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 21 treesize of output 11 [2021-06-05 16:58:22,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:22,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:22,087 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 16:58:22,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:58:22,110 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 16:58:22,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235260321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:22,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:22,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:58:22,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762291503] [2021-06-05 16:58:22,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:22,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:22,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:22,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:22,112 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:58:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:23,699 INFO L93 Difference]: Finished difference Result 2732 states and 8592 transitions. [2021-06-05 16:58:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:58:23,699 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 16:58:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:23,703 INFO L225 Difference]: With dead ends: 2732 [2021-06-05 16:58:23,703 INFO L226 Difference]: Without dead ends: 2687 [2021-06-05 16:58:23,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1343.6ms TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:58:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-06-05 16:58:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1288. [2021-06-05 16:58:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3846153846153846) internal successors, (4356), 1287 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4356 transitions. [2021-06-05 16:58:23,723 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4356 transitions. Word has length 26 [2021-06-05 16:58:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:23,723 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4356 transitions. [2021-06-05 16:58:23,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:58:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4356 transitions. [2021-06-05 16:58:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:23,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:23,725 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 16:58:23,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 16:58:23,926 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:23,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:23,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-06-05 16:58:23,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:23,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477375223] [2021-06-05 16:58:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:24,138 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 16:58:24,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:24,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477375223] [2021-06-05 16:58:24,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477375223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:24,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058257664] [2021-06-05 16:58:24,138 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 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 16:58:24,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:58:24,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:24,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:24,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:24,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:24,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:24,292 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 21 treesize of output 39 [2021-06-05 16:58:24,299 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:58:24,314 INFO L628 ElimStorePlain]: treesize reduction 19, result has 48.6 percent of original size [2021-06-05 16:58:24,326 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 16:58:24,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 16:58:24,378 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 16:58:24,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058257664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:24,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:24,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:58:24,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197292068] [2021-06-05 16:58:24,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:24,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:24,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:24,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:24,379 INFO L87 Difference]: Start difference. First operand 1288 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:58:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:26,346 INFO L93 Difference]: Finished difference Result 3013 states and 9417 transitions. [2021-06-05 16:58:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:58:26,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 16:58:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:26,350 INFO L225 Difference]: With dead ends: 3013 [2021-06-05 16:58:26,350 INFO L226 Difference]: Without dead ends: 2968 [2021-06-05 16:58:26,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1660.0ms TimeCoverageRelationStatistics Valid=567, Invalid=2295, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:58:26,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-06-05 16:58:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 1292. [2021-06-05 16:58:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3903950426026337) internal successors, (4377), 1291 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4377 transitions. [2021-06-05 16:58:26,371 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4377 transitions. Word has length 26 [2021-06-05 16:58:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:26,372 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4377 transitions. [2021-06-05 16:58:26,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:58:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4377 transitions. [2021-06-05 16:58:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:26,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:26,373 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 16:58:26,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 16:58:26,574 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:26,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-06-05 16:58:26,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:26,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377797241] [2021-06-05 16:58:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:26,799 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 16:58:26,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:26,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377797241] [2021-06-05 16:58:26,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377797241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:26,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486434087] [2021-06-05 16:58:26,800 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 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 16:58:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:26,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:58:26,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:27,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:27,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:27,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-06-05 16:58:27,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:27,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:27,025 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 16:58:27,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:58:27,041 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 16:58:27,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486434087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:27,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:27,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:27,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062730519] [2021-06-05 16:58:27,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:27,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:27,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:27,043 INFO L87 Difference]: Start difference. First operand 1292 states and 4377 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 16:58:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:27,454 INFO L93 Difference]: Finished difference Result 1654 states and 5477 transitions. [2021-06-05 16:58:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:58:27,454 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 26 [2021-06-05 16:58:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:27,456 INFO L225 Difference]: With dead ends: 1654 [2021-06-05 16:58:27,456 INFO L226 Difference]: Without dead ends: 1639 [2021-06-05 16:58:27,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 543.3ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:58:27,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-06-05 16:58:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1309. [2021-06-05 16:58:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.385321100917431) internal successors, (4428), 1308 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4428 transitions. [2021-06-05 16:58:27,481 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4428 transitions. Word has length 26 [2021-06-05 16:58:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:27,481 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4428 transitions. [2021-06-05 16:58:27,481 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 16:58:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4428 transitions. [2021-06-05 16:58:27,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:27,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:27,484 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 16:58:27,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:27,690 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:27,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:27,690 INFO L82 PathProgramCache]: Analyzing trace with hash -426889313, now seen corresponding path program 14 times [2021-06-05 16:58:27,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:27,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311567690] [2021-06-05 16:58:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:27,906 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 16:58:27,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:27,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311567690] [2021-06-05 16:58:27,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311567690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:27,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517795194] [2021-06-05 16:58:27,906 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 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 16:58:27,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:27,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:27,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:58:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:28,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:28,130 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 16:58:28,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:28,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:28,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:28,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:100 [2021-06-05 16:58:28,327 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 16:58:28,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517795194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:28,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:28,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:58:28,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820181951] [2021-06-05 16:58:28,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:28,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:28,328 INFO L87 Difference]: Start difference. First operand 1309 states and 4428 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 16:58:29,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:29,990 INFO L93 Difference]: Finished difference Result 2013 states and 6430 transitions. [2021-06-05 16:58:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:58:29,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 26 [2021-06-05 16:58:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:29,993 INFO L225 Difference]: With dead ends: 2013 [2021-06-05 16:58:29,993 INFO L226 Difference]: Without dead ends: 1983 [2021-06-05 16:58:29,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1434.3ms TimeCoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:58:29,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-06-05 16:58:30,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1297. [2021-06-05 16:58:30,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-05 16:58:30,019 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-05 16:58:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:30,019 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-05 16:58:30,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 16:58:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-05 16:58:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:30,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:30,021 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 16:58:30,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:30,225 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1363716195, now seen corresponding path program 15 times [2021-06-05 16:58:30,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:30,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395172065] [2021-06-05 16:58:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:30,439 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 16:58:30,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:30,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395172065] [2021-06-05 16:58:30,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395172065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:30,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989255419] [2021-06-05 16:58:30,440 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 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 16:58:30,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:30,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:30,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:58:30,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:30,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:30,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-06-05 16:58:30,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:30,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:30,674 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 16:58:30,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-06-05 16:58:30,742 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 16:58:30,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989255419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:30,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:30,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:58:30,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444660047] [2021-06-05 16:58:30,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:30,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:30,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:30,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:30,743 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:58:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:32,115 INFO L93 Difference]: Finished difference Result 2000 states and 6503 transitions. [2021-06-05 16:58:32,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:58:32,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 16:58:32,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:32,117 INFO L225 Difference]: With dead ends: 2000 [2021-06-05 16:58:32,117 INFO L226 Difference]: Without dead ends: 1985 [2021-06-05 16:58:32,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1132.9ms TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:58:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-06-05 16:58:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1289. [2021-06-05 16:58:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 3.3944099378881987) internal successors, (4372), 1288 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 4372 transitions. [2021-06-05 16:58:32,144 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 4372 transitions. Word has length 26 [2021-06-05 16:58:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:32,144 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 4372 transitions. [2021-06-05 16:58:32,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:58:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 4372 transitions. [2021-06-05 16:58:32,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:32,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:32,147 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 16:58:32,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:32,361 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:32,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:32,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 16 times [2021-06-05 16:58:32,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:32,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430900678] [2021-06-05 16:58:32,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:32,561 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 16:58:32,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:32,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430900678] [2021-06-05 16:58:32,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430900678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:32,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320073518] [2021-06-05 16:58:32,561 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 16:58:32,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:32,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:32,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:32,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:32,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:32,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:32,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-06-05 16:58:32,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:32,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:32,733 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 16:58:32,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:58:32,753 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 16:58:32,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320073518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:32,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:32,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:58:32,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694438275] [2021-06-05 16:58:32,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:32,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:32,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:32,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:32,754 INFO L87 Difference]: Start difference. First operand 1289 states and 4372 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) 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 16:58:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:33,793 INFO L93 Difference]: Finished difference Result 2049 states and 6731 transitions. [2021-06-05 16:58:33,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:58:33,798 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) 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 16:58:33,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:33,801 INFO L225 Difference]: With dead ends: 2049 [2021-06-05 16:58:33,801 INFO L226 Difference]: Without dead ends: 2034 [2021-06-05 16:58:33,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 944.5ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:58:33,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-06-05 16:58:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1298. [2021-06-05 16:58:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.3939861218195837) internal successors, (4402), 1297 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4402 transitions. [2021-06-05 16:58:33,819 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4402 transitions. Word has length 26 [2021-06-05 16:58:33,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:33,819 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 4402 transitions. [2021-06-05 16:58:33,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) 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 16:58:33,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4402 transitions. [2021-06-05 16:58:33,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:33,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:33,821 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 16:58:34,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:34,033 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:34,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:34,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 17 times [2021-06-05 16:58:34,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:34,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926101202] [2021-06-05 16:58:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:34,235 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 16:58:34,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:34,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926101202] [2021-06-05 16:58:34,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926101202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:34,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568700432] [2021-06-05 16:58:34,236 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 16:58:34,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:58:34,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:34,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:34,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:34,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:34,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:34,496 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 19 treesize of output 11 [2021-06-05 16:58:34,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:34,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:34,502 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 16:58:34,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:58:34,524 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 16:58:34,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568700432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:34,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:34,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:58:34,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560478623] [2021-06-05 16:58:34,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:34,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:34,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:34,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:34,526 INFO L87 Difference]: Start difference. First operand 1298 states and 4402 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 16:58:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:35,518 INFO L93 Difference]: Finished difference Result 1774 states and 5862 transitions. [2021-06-05 16:58:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:58:35,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 16:58:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:35,520 INFO L225 Difference]: With dead ends: 1774 [2021-06-05 16:58:35,521 INFO L226 Difference]: Without dead ends: 1759 [2021-06-05 16:58:35,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 910.7ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:58:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-06-05 16:58:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1301. [2021-06-05 16:58:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.3953846153846152) internal successors, (4414), 1300 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4414 transitions. [2021-06-05 16:58:35,537 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4414 transitions. Word has length 26 [2021-06-05 16:58:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:35,537 INFO L482 AbstractCegarLoop]: Abstraction has 1301 states and 4414 transitions. [2021-06-05 16:58:35,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 16:58:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4414 transitions. [2021-06-05 16:58:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:35,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:35,539 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 16:58:35,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 16:58:35,740 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:35,740 INFO L82 PathProgramCache]: Analyzing trace with hash 2108946275, now seen corresponding path program 18 times [2021-06-05 16:58:35,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:35,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125523083] [2021-06-05 16:58:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:35,936 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 16:58:35,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:35,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125523083] [2021-06-05 16:58:35,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125523083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:35,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784848715] [2021-06-05 16:58:35,937 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 16:58:35,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:58:35,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:35,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:58:35,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:36,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:36,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:36,117 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 19 treesize of output 19 [2021-06-05 16:58:36,119 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:58:36,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:36,130 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 16:58:36,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 16:58:36,174 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 16:58:36,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784848715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:36,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:36,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:36,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038851097] [2021-06-05 16:58:36,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:36,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:36,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:36,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:36,175 INFO L87 Difference]: Start difference. First operand 1301 states and 4414 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 16:58:37,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:37,104 INFO L93 Difference]: Finished difference Result 2057 states and 6754 transitions. [2021-06-05 16:58:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:58:37,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 26 [2021-06-05 16:58:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:37,107 INFO L225 Difference]: With dead ends: 2057 [2021-06-05 16:58:37,107 INFO L226 Difference]: Without dead ends: 2042 [2021-06-05 16:58:37,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 852.9ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:58:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-06-05 16:58:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1295. [2021-06-05 16:58:37,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.39258114374034) internal successors, (4390), 1294 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:37,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4390 transitions. [2021-06-05 16:58:37,127 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4390 transitions. Word has length 26 [2021-06-05 16:58:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:37,127 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4390 transitions. [2021-06-05 16:58:37,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 16:58:37,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4390 transitions. [2021-06-05 16:58:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:37,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:37,129 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 16:58:37,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:37,329 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:37,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:37,330 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 19 times [2021-06-05 16:58:37,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:37,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733701706] [2021-06-05 16:58:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:37,573 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 16:58:37,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:37,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733701706] [2021-06-05 16:58:37,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733701706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:37,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286321892] [2021-06-05 16:58:37,573 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 16:58:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:37,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:58:37,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:37,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:37,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:37,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-06-05 16:58:37,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:37,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:37,774 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 16:58:37,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:58:37,790 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 16:58:37,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286321892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:37,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:37,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:37,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129224113] [2021-06-05 16:58:37,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:37,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:37,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:37,791 INFO L87 Difference]: Start difference. First operand 1295 states and 4390 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 16:58:38,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:38,263 INFO L93 Difference]: Finished difference Result 1746 states and 5752 transitions. [2021-06-05 16:58:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:58:38,264 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 26 [2021-06-05 16:58:38,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:38,266 INFO L225 Difference]: With dead ends: 1746 [2021-06-05 16:58:38,266 INFO L226 Difference]: Without dead ends: 1725 [2021-06-05 16:58:38,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 535.2ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:58:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-06-05 16:58:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1336. [2021-06-05 16:58:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.3872659176029964) internal successors, (4522), 1335 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4522 transitions. [2021-06-05 16:58:38,288 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4522 transitions. Word has length 26 [2021-06-05 16:58:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:38,288 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4522 transitions. [2021-06-05 16:58:38,288 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 16:58:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4522 transitions. [2021-06-05 16:58:38,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:38,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:38,291 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 16:58:38,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:38,513 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:38,514 INFO L82 PathProgramCache]: Analyzing trace with hash 658414247, now seen corresponding path program 20 times [2021-06-05 16:58:38,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:38,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372507311] [2021-06-05 16:58:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:38,740 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 16:58:38,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:38,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372507311] [2021-06-05 16:58:38,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372507311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:38,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803488727] [2021-06-05 16:58:38,741 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 16:58:38,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:38,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:38,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:58:38,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:38,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:38,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 16:58:38,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:38,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:38,978 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 16:58:38,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-06-05 16:58:39,089 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 16:58:39,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803488727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:39,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:39,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:58:39,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247688698] [2021-06-05 16:58:39,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:39,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:39,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:39,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:39,091 INFO L87 Difference]: Start difference. First operand 1336 states and 4522 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:58:40,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:40,045 INFO L93 Difference]: Finished difference Result 2131 states and 6881 transitions. [2021-06-05 16:58:40,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:58:40,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 16:58:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:40,048 INFO L225 Difference]: With dead ends: 2131 [2021-06-05 16:58:40,049 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 16:58:40,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 922.0ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:58:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 16:58:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1348. [2021-06-05 16:58:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.3919821826280625) internal successors, (4569), 1347 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4569 transitions. [2021-06-05 16:58:40,070 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4569 transitions. Word has length 26 [2021-06-05 16:58:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:40,070 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4569 transitions. [2021-06-05 16:58:40,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:58:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4569 transitions. [2021-06-05 16:58:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:40,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:40,072 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 16:58:40,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:40,273 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:40,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:40,273 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 21 times [2021-06-05 16:58:40,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:40,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029650358] [2021-06-05 16:58:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:40,472 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 16:58:40,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:40,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029650358] [2021-06-05 16:58:40,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029650358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:40,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189868048] [2021-06-05 16:58:40,472 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 16:58:40,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:58:40,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:40,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:40,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:40,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:40,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-06-05 16:58:40,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:40,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:40,703 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 16:58:40,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-06-05 16:58:40,807 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 16:58:40,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189868048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:40,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:40,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:58:40,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245146880] [2021-06-05 16:58:40,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:40,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:40,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:40,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:40,808 INFO L87 Difference]: Start difference. First operand 1348 states and 4569 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:58:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:41,611 INFO L93 Difference]: Finished difference Result 1900 states and 6269 transitions. [2021-06-05 16:58:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:58:41,611 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 16:58:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:41,614 INFO L225 Difference]: With dead ends: 1900 [2021-06-05 16:58:41,614 INFO L226 Difference]: Without dead ends: 1875 [2021-06-05 16:58:41,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 772.4ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:58:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-06-05 16:58:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1361. [2021-06-05 16:58:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.398529411764706) internal successors, (4622), 1360 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:41,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4622 transitions. [2021-06-05 16:58:41,631 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4622 transitions. Word has length 26 [2021-06-05 16:58:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:41,632 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4622 transitions. [2021-06-05 16:58:41,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:58:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4622 transitions. [2021-06-05 16:58:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:41,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:41,634 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 16:58:41,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:41,834 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:41,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:41,834 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 22 times [2021-06-05 16:58:41,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:41,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531342711] [2021-06-05 16:58:41,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:42,023 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 16:58:42,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:42,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531342711] [2021-06-05 16:58:42,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531342711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:42,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118680224] [2021-06-05 16:58:42,024 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 16:58:42,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:42,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:58:42,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:42,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:42,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:42,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 16:58:42,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:42,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:42,242 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 16:58:42,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:58:42,261 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 16:58:42,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118680224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:42,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:42,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:42,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573553678] [2021-06-05 16:58:42,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:42,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:42,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:42,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:42,263 INFO L87 Difference]: Start difference. First operand 1361 states and 4622 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:58:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:42,705 INFO L93 Difference]: Finished difference Result 1726 states and 5748 transitions. [2021-06-05 16:58:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:58:42,705 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 16:58:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:42,708 INFO L225 Difference]: With dead ends: 1726 [2021-06-05 16:58:42,708 INFO L226 Difference]: Without dead ends: 1711 [2021-06-05 16:58:42,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 494.7ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:58:42,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-06-05 16:58:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1372. [2021-06-05 16:58:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.3982494529540483) internal successors, (4659), 1371 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4659 transitions. [2021-06-05 16:58:42,724 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4659 transitions. Word has length 26 [2021-06-05 16:58:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:42,724 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4659 transitions. [2021-06-05 16:58:42,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:58:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4659 transitions. [2021-06-05 16:58:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:42,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:42,726 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 16:58:42,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 16:58:42,927 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:42,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1194379997, now seen corresponding path program 23 times [2021-06-05 16:58:42,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:42,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962673988] [2021-06-05 16:58:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:43,111 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 16:58:43,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:43,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962673988] [2021-06-05 16:58:43,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962673988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:43,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667605452] [2021-06-05 16:58:43,112 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 16:58:43,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:58:43,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:43,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:58:43,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:43,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:43,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:43,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 16:58:43,289 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:58:43,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:43,301 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 16:58:43,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 16:58:43,350 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 16:58:43,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667605452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:43,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:43,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:58:43,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215558503] [2021-06-05 16:58:43,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:43,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:43,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:43,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:43,351 INFO L87 Difference]: Start difference. First operand 1372 states and 4659 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 16:58:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:44,221 INFO L93 Difference]: Finished difference Result 2060 states and 6782 transitions. [2021-06-05 16:58:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:58:44,221 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 16:58:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:44,224 INFO L225 Difference]: With dead ends: 2060 [2021-06-05 16:58:44,224 INFO L226 Difference]: Without dead ends: 2041 [2021-06-05 16:58:44,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 762.0ms TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:58:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-06-05 16:58:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1373. [2021-06-05 16:58:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1372 states have (on average 3.401603498542274) internal successors, (4667), 1372 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 4667 transitions. [2021-06-05 16:58:44,242 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 4667 transitions. Word has length 26 [2021-06-05 16:58:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:44,243 INFO L482 AbstractCegarLoop]: Abstraction has 1373 states and 4667 transitions. [2021-06-05 16:58:44,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 16:58:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 4667 transitions. [2021-06-05 16:58:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:44,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:44,245 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 16:58:44,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:44,446 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 24 times [2021-06-05 16:58:44,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:44,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401016891] [2021-06-05 16:58:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:44,647 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 16:58:44,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:44,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401016891] [2021-06-05 16:58:44,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401016891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:44,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368660712] [2021-06-05 16:58:44,648 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 16:58:44,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:58:44,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:44,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:44,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:44,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:44,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:44,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 16:58:44,831 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:58:44,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:44,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:58:44,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 16:58:44,892 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 16:58:44,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368660712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:44,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:44,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:58:44,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327188829] [2021-06-05 16:58:44,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:58:44,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:44,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:58:44,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:58:44,893 INFO L87 Difference]: Start difference. First operand 1373 states and 4667 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 16:58:45,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:45,698 INFO L93 Difference]: Finished difference Result 1917 states and 6334 transitions. [2021-06-05 16:58:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:58:45,699 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 16:58:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:45,701 INFO L225 Difference]: With dead ends: 1917 [2021-06-05 16:58:45,701 INFO L226 Difference]: Without dead ends: 1892 [2021-06-05 16:58:45,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 759.8ms TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:58:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-06-05 16:58:45,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1379. [2021-06-05 16:58:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 3.399854862119013) internal successors, (4685), 1378 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 4685 transitions. [2021-06-05 16:58:45,718 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 4685 transitions. Word has length 26 [2021-06-05 16:58:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:45,718 INFO L482 AbstractCegarLoop]: Abstraction has 1379 states and 4685 transitions. [2021-06-05 16:58:45,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 16:58:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 4685 transitions. [2021-06-05 16:58:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:45,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:45,720 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 16:58:45,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:45,921 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:45,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:45,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-06-05 16:58:45,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:45,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070176642] [2021-06-05 16:58:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:46,156 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 16:58:46,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:46,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070176642] [2021-06-05 16:58:46,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070176642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:46,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000989316] [2021-06-05 16:58:46,157 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 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 16:58:46,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:58:46,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:46,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:58:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:46,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:46,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:46,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:46,318 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 21 treesize of output 11 [2021-06-05 16:58:46,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:46,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:46,327 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 16:58:46,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:58:46,340 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 16:58:46,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000989316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:46,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:46,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:58:46,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457698157] [2021-06-05 16:58:46,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:46,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:46,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:46,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:46,340 INFO L87 Difference]: Start difference. First operand 1379 states and 4685 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) 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 16:58:47,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:47,137 INFO L93 Difference]: Finished difference Result 1799 states and 5934 transitions. [2021-06-05 16:58:47,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:58:47,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 26 [2021-06-05 16:58:47,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:47,140 INFO L225 Difference]: With dead ends: 1799 [2021-06-05 16:58:47,140 INFO L226 Difference]: Without dead ends: 1773 [2021-06-05 16:58:47,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 758.5ms TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:58:47,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-06-05 16:58:47,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1391. [2021-06-05 16:58:47,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.3949640287769784) internal successors, (4719), 1390 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4719 transitions. [2021-06-05 16:58:47,156 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4719 transitions. Word has length 26 [2021-06-05 16:58:47,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:47,156 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4719 transitions. [2021-06-05 16:58:47,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 16:58:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4719 transitions. [2021-06-05 16:58:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:47,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:47,158 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 16:58:47,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:47,358 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:47,359 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-06-05 16:58:47,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:47,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731038209] [2021-06-05 16:58:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:47,577 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 16:58:47,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:47,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731038209] [2021-06-05 16:58:47,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731038209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:47,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737950413] [2021-06-05 16:58:47,577 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 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 16:58:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:47,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:58:47,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:47,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:47,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:47,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:47,726 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-05 16:58:47,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:47,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:47,732 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 16:58:47,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:58:47,751 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 16:58:47,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737950413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:47,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:47,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:58:47,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113782292] [2021-06-05 16:58:47,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:47,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:47,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:47,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:47,752 INFO L87 Difference]: Start difference. First operand 1391 states and 4719 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) 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 16:58:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:48,807 INFO L93 Difference]: Finished difference Result 1991 states and 6577 transitions. [2021-06-05 16:58:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:58:48,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 26 [2021-06-05 16:58:48,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:48,810 INFO L225 Difference]: With dead ends: 1991 [2021-06-05 16:58:48,810 INFO L226 Difference]: Without dead ends: 1976 [2021-06-05 16:58:48,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 934.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:58:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-06-05 16:58:48,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1391. [2021-06-05 16:58:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.3949640287769784) internal successors, (4719), 1390 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4719 transitions. [2021-06-05 16:58:48,827 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4719 transitions. Word has length 26 [2021-06-05 16:58:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:48,827 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4719 transitions. [2021-06-05 16:58:48,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 16:58:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4719 transitions. [2021-06-05 16:58:48,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:48,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:48,829 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 16:58:49,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:49,029 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:49,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:49,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 25 times [2021-06-05 16:58:49,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:49,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628548488] [2021-06-05 16:58:49,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:49,287 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 16:58:49,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:49,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628548488] [2021-06-05 16:58:49,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628548488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:49,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891225633] [2021-06-05 16:58:49,288 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 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 16:58:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:49,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:58:49,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:49,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:49,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:58:49,489 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 16:58:49,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:58:49,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:49,495 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 16:58:49,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:58:49,516 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 16:58:49,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891225633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:49,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:49,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:49,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772741061] [2021-06-05 16:58:49,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:49,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:49,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:49,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:49,518 INFO L87 Difference]: Start difference. First operand 1391 states and 4719 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:58:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:50,168 INFO L93 Difference]: Finished difference Result 1897 states and 6187 transitions. [2021-06-05 16:58:50,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:58:50,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 16:58:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:50,170 INFO L225 Difference]: With dead ends: 1897 [2021-06-05 16:58:50,170 INFO L226 Difference]: Without dead ends: 1882 [2021-06-05 16:58:50,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 673.5ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:58:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-06-05 16:58:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1402. [2021-06-05 16:58:50,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.3954318344039973) internal successors, (4757), 1401 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4757 transitions. [2021-06-05 16:58:50,187 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4757 transitions. Word has length 26 [2021-06-05 16:58:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:50,187 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4757 transitions. [2021-06-05 16:58:50,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:58:50,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4757 transitions. [2021-06-05 16:58:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:50,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:50,189 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 16:58:50,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 16:58:50,389 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:50,389 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-06-05 16:58:50,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:50,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335855963] [2021-06-05 16:58:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:50,666 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 16:58:50,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:50,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335855963] [2021-06-05 16:58:50,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335855963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:50,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904009722] [2021-06-05 16:58:50,667 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 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 16:58:50,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:50,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:50,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:58:50,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:50,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:50,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:50,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:50,867 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 21 treesize of output 37 [2021-06-05 16:58:50,872 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:58:50,886 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 16:58:50,888 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 16:58:50,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:19 [2021-06-05 16:58:50,947 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 16:58:50,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904009722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:50,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:50,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:58:50,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507186157] [2021-06-05 16:58:50,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:58:50,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:50,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:58:50,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:58:50,949 INFO L87 Difference]: Start difference. First operand 1402 states and 4757 transitions. Second operand has 20 states, 20 states have (on average 2.4) 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 16:58:52,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:52,693 INFO L93 Difference]: Finished difference Result 2292 states and 7266 transitions. [2021-06-05 16:58:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:58:52,694 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) 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 16:58:52,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:52,696 INFO L225 Difference]: With dead ends: 2292 [2021-06-05 16:58:52,696 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 16:58:52,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1566.8ms TimeCoverageRelationStatistics Valid=492, Invalid=2370, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:58:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 16:58:52,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1409. [2021-06-05 16:58:52,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.3963068181818183) internal successors, (4782), 1408 states have internal predecessors, (4782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4782 transitions. [2021-06-05 16:58:52,714 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4782 transitions. Word has length 26 [2021-06-05 16:58:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:52,714 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4782 transitions. [2021-06-05 16:58:52,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) 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 16:58:52,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4782 transitions. [2021-06-05 16:58:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:52,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:52,716 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 16:58:52,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 16:58:52,916 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:52,917 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-06-05 16:58:52,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:52,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325576367] [2021-06-05 16:58:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:53,140 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 16:58:53,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:53,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325576367] [2021-06-05 16:58:53,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325576367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:53,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220780192] [2021-06-05 16:58:53,141 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 16:58:53,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:53,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:53,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:58:53,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:53,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:53,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:53,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:53,331 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 21 treesize of output 37 [2021-06-05 16:58:53,337 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:58:53,369 INFO L628 ElimStorePlain]: treesize reduction 15, result has 60.5 percent of original size [2021-06-05 16:58:53,371 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 16:58:53,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:35 [2021-06-05 16:58:53,423 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 16:58:53,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220780192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:53,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:53,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 16:58:53,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027781867] [2021-06-05 16:58:53,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:58:53,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:53,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:58:53,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:58:53,424 INFO L87 Difference]: Start difference. First operand 1409 states and 4782 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 16:58:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:54,833 INFO L93 Difference]: Finished difference Result 2493 states and 8039 transitions. [2021-06-05 16:58:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:58:54,833 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 16:58:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:54,837 INFO L225 Difference]: With dead ends: 2493 [2021-06-05 16:58:54,837 INFO L226 Difference]: Without dead ends: 2478 [2021-06-05 16:58:54,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1220.5ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:58:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-06-05 16:58:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1419. [2021-06-05 16:58:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3970380818053596) internal successors, (4817), 1418 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4817 transitions. [2021-06-05 16:58:54,866 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4817 transitions. Word has length 26 [2021-06-05 16:58:54,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:54,866 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4817 transitions. [2021-06-05 16:58:54,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 16:58:54,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4817 transitions. [2021-06-05 16:58:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:54,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:54,868 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 16:58:55,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:55,068 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:55,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:55,069 INFO L82 PathProgramCache]: Analyzing trace with hash 558815383, now seen corresponding path program 26 times [2021-06-05 16:58:55,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:55,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571938286] [2021-06-05 16:58:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:55,247 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 16:58:55,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:55,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571938286] [2021-06-05 16:58:55,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571938286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:55,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795255933] [2021-06-05 16:58:55,248 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 16:58:55,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:58:55,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:55,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:58:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:55,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:55,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:55,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 35 [2021-06-05 16:58:55,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:55,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:55,477 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 16:58:55,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:105 [2021-06-05 16:58:55,578 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 16:58:55,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795255933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:55,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:55,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:58:55,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121622946] [2021-06-05 16:58:55,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:58:55,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:55,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:58:55,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:58:55,579 INFO L87 Difference]: Start difference. First operand 1419 states and 4817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:58:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:57,568 INFO L93 Difference]: Finished difference Result 2315 states and 7376 transitions. [2021-06-05 16:58:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:58:57,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:58:57,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:57,572 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 16:58:57,572 INFO L226 Difference]: Without dead ends: 2281 [2021-06-05 16:58:57,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1645.2ms TimeCoverageRelationStatistics Valid=399, Invalid=1953, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:58:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-06-05 16:58:57,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1435. [2021-06-05 16:58:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.406555090655509) internal successors, (4885), 1434 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:57,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4885 transitions. [2021-06-05 16:58:57,591 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4885 transitions. Word has length 26 [2021-06-05 16:58:57,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:57,591 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4885 transitions. [2021-06-05 16:58:57,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:58:57,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4885 transitions. [2021-06-05 16:58:57,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:57,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:57,593 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 16:58:57,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:57,797 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash -491765317, now seen corresponding path program 27 times [2021-06-05 16:58:57,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:57,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238570082] [2021-06-05 16:58:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:57,983 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 16:58:57,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:57,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238570082] [2021-06-05 16:58:57,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238570082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:57,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888031500] [2021-06-05 16:58:57,984 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 16:58:58,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:58:58,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:58,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:58:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:58:58,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:58:58,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:58,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-06-05 16:58:58,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:58:58,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:58:58,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:58:58,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:65 [2021-06-05 16:58:58,280 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 16:58:58,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888031500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:58,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:58:58,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:58:58,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184468039] [2021-06-05 16:58:58,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:58:58,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:58:58,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:58:58,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:58:58,281 INFO L87 Difference]: Start difference. First operand 1435 states and 4885 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:58:59,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:58:59,479 INFO L93 Difference]: Finished difference Result 2365 states and 7650 transitions. [2021-06-05 16:58:59,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:58:59,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 16:58:59,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:58:59,482 INFO L225 Difference]: With dead ends: 2365 [2021-06-05 16:58:59,482 INFO L226 Difference]: Without dead ends: 2346 [2021-06-05 16:58:59,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 925.9ms TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:58:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-05 16:58:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1429. [2021-06-05 16:58:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.40406162464986) internal successors, (4861), 1428 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:58:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4861 transitions. [2021-06-05 16:58:59,503 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4861 transitions. Word has length 26 [2021-06-05 16:58:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:58:59,503 INFO L482 AbstractCegarLoop]: Abstraction has 1429 states and 4861 transitions. [2021-06-05 16:58:59,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:58:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4861 transitions. [2021-06-05 16:58:59,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:58:59,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:58:59,505 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 16:58:59,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:58:59,705 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:58:59,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:58:59,706 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-06-05 16:58:59,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:58:59,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093983478] [2021-06-05 16:58:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:58:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:58:59,876 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 16:58:59,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:58:59,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093983478] [2021-06-05 16:58:59,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093983478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:58:59,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028902467] [2021-06-05 16:58:59,876 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 16:58:59,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:58:59,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:58:59,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:58:59,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:00,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:00,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:00,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:00,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:00,017 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 21 treesize of output 11 [2021-06-05 16:59:00,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:00,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:00,022 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 16:59:00,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:59:00,046 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 16:59:00,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028902467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:00,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:00,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:59:00,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508910450] [2021-06-05 16:59:00,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:00,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:00,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:00,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:00,048 INFO L87 Difference]: Start difference. First operand 1429 states and 4861 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:59:01,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:01,498 INFO L93 Difference]: Finished difference Result 3028 states and 9674 transitions. [2021-06-05 16:59:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:59:01,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 16:59:01,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:01,502 INFO L225 Difference]: With dead ends: 3028 [2021-06-05 16:59:01,503 INFO L226 Difference]: Without dead ends: 2992 [2021-06-05 16:59:01,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1158.4ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:59:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-06-05 16:59:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 1562. [2021-06-05 16:59:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.42152466367713) internal successors, (5341), 1561 states have internal predecessors, (5341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:01,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5341 transitions. [2021-06-05 16:59:01,529 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5341 transitions. Word has length 26 [2021-06-05 16:59:01,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:01,529 INFO L482 AbstractCegarLoop]: Abstraction has 1562 states and 5341 transitions. [2021-06-05 16:59:01,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:59:01,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5341 transitions. [2021-06-05 16:59:01,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:01,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:01,531 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 16:59:01,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:01,731 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:01,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:01,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-06-05 16:59:01,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:01,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508774725] [2021-06-05 16:59:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:01,905 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 16:59:01,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:01,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508774725] [2021-06-05 16:59:01,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508774725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:01,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555133456] [2021-06-05 16:59:01,906 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 16:59:01,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:01,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:01,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:02,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:02,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:02,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:02,034 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 21 treesize of output 39 [2021-06-05 16:59:02,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:02,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:02,067 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 16:59:02,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 16:59:02,108 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 16:59:02,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555133456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:02,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:02,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:59:02,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409534903] [2021-06-05 16:59:02,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:02,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:02,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:02,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:02,109 INFO L87 Difference]: Start difference. First operand 1562 states and 5341 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:59:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:03,839 INFO L93 Difference]: Finished difference Result 3412 states and 10776 transitions. [2021-06-05 16:59:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:59:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 16:59:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:03,844 INFO L225 Difference]: With dead ends: 3412 [2021-06-05 16:59:03,844 INFO L226 Difference]: Without dead ends: 3355 [2021-06-05 16:59:03,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1444.0ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:59:03,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2021-06-05 16:59:03,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 1585. [2021-06-05 16:59:03,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.4242424242424243) internal successors, (5424), 1584 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5424 transitions. [2021-06-05 16:59:03,871 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5424 transitions. Word has length 26 [2021-06-05 16:59:03,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:03,871 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5424 transitions. [2021-06-05 16:59:03,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:59:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5424 transitions. [2021-06-05 16:59:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:03,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:03,873 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 16:59:04,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 16:59:04,074 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:04,074 INFO L82 PathProgramCache]: Analyzing trace with hash 701456227, now seen corresponding path program 28 times [2021-06-05 16:59:04,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:04,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558016149] [2021-06-05 16:59:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:04,279 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 16:59:04,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:04,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558016149] [2021-06-05 16:59:04,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558016149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:04,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455406365] [2021-06-05 16:59:04,279 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 16:59:04,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:04,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:04,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:04,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:04,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:04,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:04,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-06-05 16:59:04,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:04,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:04,463 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 16:59:04,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:59:04,485 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 16:59:04,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455406365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:04,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:04,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:59:04,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034626344] [2021-06-05 16:59:04,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:04,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:04,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:04,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:04,486 INFO L87 Difference]: Start difference. First operand 1585 states and 5424 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:59:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:05,112 INFO L93 Difference]: Finished difference Result 2011 states and 6730 transitions. [2021-06-05 16:59:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:59:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 16:59:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:05,115 INFO L225 Difference]: With dead ends: 2011 [2021-06-05 16:59:05,115 INFO L226 Difference]: Without dead ends: 1996 [2021-06-05 16:59:05,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 634.7ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:59:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-06-05 16:59:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1593. [2021-06-05 16:59:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.423994974874372) internal successors, (5451), 1592 states have internal predecessors, (5451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:05,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5451 transitions. [2021-06-05 16:59:05,133 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5451 transitions. Word has length 26 [2021-06-05 16:59:05,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:05,133 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5451 transitions. [2021-06-05 16:59:05,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:59:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5451 transitions. [2021-06-05 16:59:05,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:05,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:05,135 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 16:59:05,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 16:59:05,335 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:05,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:05,336 INFO L82 PathProgramCache]: Analyzing trace with hash -916076553, now seen corresponding path program 29 times [2021-06-05 16:59:05,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:05,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362769908] [2021-06-05 16:59:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:05,490 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 16:59:05,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:05,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362769908] [2021-06-05 16:59:05,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362769908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:05,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43360370] [2021-06-05 16:59:05,490 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 16:59:05,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:05,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:05,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:59:05,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:05,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:05,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:05,691 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 19 treesize of output 19 [2021-06-05 16:59:05,692 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:59:05,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:05,701 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 16:59:05,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 16:59:05,739 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 16:59:05,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43360370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:05,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:05,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:59:05,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856146928] [2021-06-05 16:59:05,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:05,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:05,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:05,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:05,740 INFO L87 Difference]: Start difference. First operand 1593 states and 5451 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 16:59:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:06,603 INFO L93 Difference]: Finished difference Result 2467 states and 8081 transitions. [2021-06-05 16:59:06,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:59:06,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 16:59:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:06,606 INFO L225 Difference]: With dead ends: 2467 [2021-06-05 16:59:06,607 INFO L226 Difference]: Without dead ends: 2448 [2021-06-05 16:59:06,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 751.9ms TimeCoverageRelationStatistics Valid=323, Invalid=1317, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:59:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-06-05 16:59:06,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 1588. [2021-06-05 16:59:06,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.421550094517958) internal successors, (5430), 1587 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5430 transitions. [2021-06-05 16:59:06,629 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5430 transitions. Word has length 26 [2021-06-05 16:59:06,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:06,629 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 5430 transitions. [2021-06-05 16:59:06,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 16:59:06,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5430 transitions. [2021-06-05 16:59:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:06,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:06,631 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 16:59:06,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 16:59:06,832 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:06,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:06,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 30 times [2021-06-05 16:59:06,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:06,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380860529] [2021-06-05 16:59:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:06,993 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 16:59:06,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:06,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380860529] [2021-06-05 16:59:06,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380860529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:06,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413381603] [2021-06-05 16:59:06,993 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 16:59:07,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:07,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:07,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:07,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:07,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:07,181 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 19 treesize of output 27 [2021-06-05 16:59:07,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:07,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:07,217 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 16:59:07,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:89 [2021-06-05 16:59:07,347 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 16:59:07,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413381603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:07,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:07,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:59:07,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64042737] [2021-06-05 16:59:07,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:07,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:07,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:07,348 INFO L87 Difference]: Start difference. First operand 1588 states and 5430 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:59:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:09,045 INFO L93 Difference]: Finished difference Result 2521 states and 8150 transitions. [2021-06-05 16:59:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:59:09,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:59:09,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:09,048 INFO L225 Difference]: With dead ends: 2521 [2021-06-05 16:59:09,048 INFO L226 Difference]: Without dead ends: 2452 [2021-06-05 16:59:09,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1435.0ms TimeCoverageRelationStatistics Valid=384, Invalid=1872, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:59:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-05 16:59:09,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1576. [2021-06-05 16:59:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.420952380952381) internal successors, (5388), 1575 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5388 transitions. [2021-06-05 16:59:09,068 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5388 transitions. Word has length 26 [2021-06-05 16:59:09,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:09,068 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5388 transitions. [2021-06-05 16:59:09,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:59:09,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5388 transitions. [2021-06-05 16:59:09,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:09,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:09,070 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 16:59:09,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 16:59:09,271 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:09,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash -275202939, now seen corresponding path program 48 times [2021-06-05 16:59:09,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:09,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668661606] [2021-06-05 16:59:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:09,547 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 16:59:09,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:09,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668661606] [2021-06-05 16:59:09,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668661606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:09,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995585109] [2021-06-05 16:59:09,547 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 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 16:59:09,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:59:09,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:09,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:59:09,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:09,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:09,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:09,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:09,696 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 21 treesize of output 11 [2021-06-05 16:59:09,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:09,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:09,702 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 16:59:09,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:59:09,716 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 16:59:09,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995585109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:09,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:09,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:59:09,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628872851] [2021-06-05 16:59:09,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:09,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:09,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:09,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:09,717 INFO L87 Difference]: Start difference. First operand 1576 states and 5388 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) 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 16:59:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:10,672 INFO L93 Difference]: Finished difference Result 2032 states and 6722 transitions. [2021-06-05 16:59:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:59:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 26 [2021-06-05 16:59:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:10,685 INFO L225 Difference]: With dead ends: 2032 [2021-06-05 16:59:10,685 INFO L226 Difference]: Without dead ends: 2010 [2021-06-05 16:59:10,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 913.5ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:59:10,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2021-06-05 16:59:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1568. [2021-06-05 16:59:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.4205488194001274) internal successors, (5360), 1567 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5360 transitions. [2021-06-05 16:59:10,703 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5360 transitions. Word has length 26 [2021-06-05 16:59:10,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:10,703 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 5360 transitions. [2021-06-05 16:59:10,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 16:59:10,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5360 transitions. [2021-06-05 16:59:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:10,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:10,705 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] [2021-06-05 16:59:10,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 16:59:10,905 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-06-05 16:59:10,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:10,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815712673] [2021-06-05 16:59:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:11,211 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 16:59:11,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:11,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815712673] [2021-06-05 16:59:11,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815712673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:11,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125865492] [2021-06-05 16:59:11,212 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 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 16:59:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:11,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:59:11,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:11,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:11,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:11,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:11,390 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 21 treesize of output 11 [2021-06-05 16:59:11,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:11,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:11,397 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 16:59:11,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:59:11,422 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 16:59:11,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125865492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:11,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:11,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:59:11,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679787898] [2021-06-05 16:59:11,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:11,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:11,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:11,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:11,423 INFO L87 Difference]: Start difference. First operand 1568 states and 5360 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) 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 16:59:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:12,709 INFO L93 Difference]: Finished difference Result 2234 states and 7397 transitions. [2021-06-05 16:59:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:59:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 26 [2021-06-05 16:59:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:12,713 INFO L225 Difference]: With dead ends: 2234 [2021-06-05 16:59:12,713 INFO L226 Difference]: Without dead ends: 2219 [2021-06-05 16:59:12,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1196.0ms TimeCoverageRelationStatistics Valid=421, Invalid=1649, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:59:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-06-05 16:59:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1568. [2021-06-05 16:59:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.4205488194001274) internal successors, (5360), 1567 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:12,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5360 transitions. [2021-06-05 16:59:12,733 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5360 transitions. Word has length 26 [2021-06-05 16:59:12,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:12,733 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 5360 transitions. [2021-06-05 16:59:12,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 16:59:12,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5360 transitions. [2021-06-05 16:59:12,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:12,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:12,735 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 16:59:12,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 16:59:12,937 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:12,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:12,938 INFO L82 PathProgramCache]: Analyzing trace with hash -527613613, now seen corresponding path program 50 times [2021-06-05 16:59:12,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:12,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034358678] [2021-06-05 16:59:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:13,137 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 16:59:13,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:13,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034358678] [2021-06-05 16:59:13,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034358678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:13,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440693050] [2021-06-05 16:59:13,138 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 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 16:59:13,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:13,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:13,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:59:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:13,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:13,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:13,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:13,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:13,294 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 25 treesize of output 43 [2021-06-05 16:59:13,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:13,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:13,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:13,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 16:59:13,341 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 16:59:13,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440693050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:13,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:13,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-06-05 16:59:13,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792708635] [2021-06-05 16:59:13,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:13,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:13,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:13,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:13,342 INFO L87 Difference]: Start difference. First operand 1568 states and 5360 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 16:59:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:16,931 INFO L93 Difference]: Finished difference Result 2979 states and 9505 transitions. [2021-06-05 16:59:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 16:59:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 16:59:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:16,935 INFO L225 Difference]: With dead ends: 2979 [2021-06-05 16:59:16,935 INFO L226 Difference]: Without dead ends: 2932 [2021-06-05 16:59:16,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 3014.3ms TimeCoverageRelationStatistics Valid=1084, Invalid=6056, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:59:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-06-05 16:59:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 1584. [2021-06-05 16:59:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.4112444725205306) internal successors, (5400), 1583 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5400 transitions. [2021-06-05 16:59:16,958 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5400 transitions. Word has length 26 [2021-06-05 16:59:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:16,959 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5400 transitions. [2021-06-05 16:59:16,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 16:59:16,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5400 transitions. [2021-06-05 16:59:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:16,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:16,961 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 16:59:17,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 16:59:17,161 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:17,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-06-05 16:59:17,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:17,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497801833] [2021-06-05 16:59:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:17,365 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 16:59:17,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:17,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497801833] [2021-06-05 16:59:17,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497801833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:17,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265225157] [2021-06-05 16:59:17,365 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 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 16:59:17,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:59:17,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:17,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:59:17,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:17,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:17,583 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 19 treesize of output 51 [2021-06-05 16:59:17,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:17,742 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-05 16:59:17,742 INFO L628 ElimStorePlain]: treesize reduction 66, result has 54.8 percent of original size [2021-06-05 16:59:17,750 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 16:59:17,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:214 [2021-06-05 16:59:18,051 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 16:59:18,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265225157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:18,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:18,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 16:59:18,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106341224] [2021-06-05 16:59:18,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:59:18,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:18,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:59:18,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:59:18,052 INFO L87 Difference]: Start difference. First operand 1584 states and 5400 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 16:59:19,476 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-05 16:59:19,820 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-06-05 16:59:20,019 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 16:59:20,336 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-06-05 16:59:20,571 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-05 16:59:20,720 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2021-06-05 16:59:20,982 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-06-05 16:59:21,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:21,047 INFO L93 Difference]: Finished difference Result 2665 states and 8672 transitions. [2021-06-05 16:59:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:59:21,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 16:59:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:21,051 INFO L225 Difference]: With dead ends: 2665 [2021-06-05 16:59:21,051 INFO L226 Difference]: Without dead ends: 2635 [2021-06-05 16:59:21,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2801.6ms TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:59:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-06-05 16:59:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1595. [2021-06-05 16:59:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.417189460476788) internal successors, (5447), 1594 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5447 transitions. [2021-06-05 16:59:21,083 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5447 transitions. Word has length 26 [2021-06-05 16:59:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:21,083 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 5447 transitions. [2021-06-05 16:59:21,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 16:59:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5447 transitions. [2021-06-05 16:59:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:21,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:21,085 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 16:59:21,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:21,285 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-06-05 16:59:21,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:21,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140904341] [2021-06-05 16:59:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:21,553 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 16:59:21,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:21,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140904341] [2021-06-05 16:59:21,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140904341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:21,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866583384] [2021-06-05 16:59:21,554 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 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 16:59:21,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:21,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:21,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:59:21,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:21,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:21,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:21,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:21,707 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 21 treesize of output 11 [2021-06-05 16:59:21,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:21,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:21,712 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 16:59:21,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:59:21,729 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 16:59:21,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866583384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:21,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:21,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:59:21,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310593537] [2021-06-05 16:59:21,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:21,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:21,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:21,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:21,729 INFO L87 Difference]: Start difference. First operand 1595 states and 5447 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 16:59:23,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:23,104 INFO L93 Difference]: Finished difference Result 2141 states and 7071 transitions. [2021-06-05 16:59:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:59:23,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 26 [2021-06-05 16:59:23,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:23,107 INFO L225 Difference]: With dead ends: 2141 [2021-06-05 16:59:23,107 INFO L226 Difference]: Without dead ends: 2126 [2021-06-05 16:59:23,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1203.8ms TimeCoverageRelationStatistics Valid=350, Invalid=1456, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:59:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-05 16:59:23,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1599. [2021-06-05 16:59:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4173967459324155) internal successors, (5461), 1598 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5461 transitions. [2021-06-05 16:59:23,125 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5461 transitions. Word has length 26 [2021-06-05 16:59:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:23,126 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5461 transitions. [2021-06-05 16:59:23,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 16:59:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5461 transitions. [2021-06-05 16:59:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:23,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:23,128 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 16:59:23,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 16:59:23,328 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:23,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:23,329 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-06-05 16:59:23,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:23,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529508267] [2021-06-05 16:59:23,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:23,548 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 16:59:23,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:23,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529508267] [2021-06-05 16:59:23,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529508267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:23,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263227705] [2021-06-05 16:59:23,549 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 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 16:59:23,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:59:23,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:23,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:59:23,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:23,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:23,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:23,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:23,754 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 21 treesize of output 39 [2021-06-05 16:59:23,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:23,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:23,774 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 16:59:23,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 16:59:23,820 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 16:59:23,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263227705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:23,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:23,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 16:59:23,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863261105] [2021-06-05 16:59:23,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:59:23,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:23,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:59:23,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:59:23,821 INFO L87 Difference]: Start difference. First operand 1599 states and 5461 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 16:59:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:24,925 INFO L93 Difference]: Finished difference Result 2310 states and 7701 transitions. [2021-06-05 16:59:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:59:24,925 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 16:59:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:24,928 INFO L225 Difference]: With dead ends: 2310 [2021-06-05 16:59:24,928 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 16:59:24,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 938.2ms TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:59:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 16:59:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1599. [2021-06-05 16:59:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4173967459324155) internal successors, (5461), 1598 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5461 transitions. [2021-06-05 16:59:24,948 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5461 transitions. Word has length 26 [2021-06-05 16:59:24,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:24,948 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5461 transitions. [2021-06-05 16:59:24,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 16:59:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5461 transitions. [2021-06-05 16:59:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:24,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:24,950 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 16:59:25,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 16:59:25,150 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:25,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:25,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1001444339, now seen corresponding path program 54 times [2021-06-05 16:59:25,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:25,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368888368] [2021-06-05 16:59:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:25,378 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 16:59:25,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368888368] [2021-06-05 16:59:25,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368888368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146796700] [2021-06-05 16:59:25,378 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 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 16:59:25,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:59:25,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:25,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:25,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:25,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:25,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:25,518 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 21 treesize of output 37 [2021-06-05 16:59:25,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:25,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:25,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:25,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-06-05 16:59:25,567 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 16:59:25,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146796700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:25,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:25,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:59:25,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560451583] [2021-06-05 16:59:25,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:25,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:25,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:25,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:25,568 INFO L87 Difference]: Start difference. First operand 1599 states and 5461 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 16:59:27,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:27,820 INFO L93 Difference]: Finished difference Result 2882 states and 9198 transitions. [2021-06-05 16:59:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:59:27,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 16:59:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:27,825 INFO L225 Difference]: With dead ends: 2882 [2021-06-05 16:59:27,825 INFO L226 Difference]: Without dead ends: 2848 [2021-06-05 16:59:27,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1992.0ms TimeCoverageRelationStatistics Valid=698, Invalid=2494, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:59:27,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-06-05 16:59:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 1599. [2021-06-05 16:59:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4198998748435545) internal successors, (5465), 1598 states have internal predecessors, (5465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:27,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5465 transitions. [2021-06-05 16:59:27,873 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5465 transitions. Word has length 26 [2021-06-05 16:59:27,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:27,873 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5465 transitions. [2021-06-05 16:59:27,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 16:59:27,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5465 transitions. [2021-06-05 16:59:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:27,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:27,875 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 16:59:28,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 16:59:28,076 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:28,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:28,076 INFO L82 PathProgramCache]: Analyzing trace with hash -344448797, now seen corresponding path program 31 times [2021-06-05 16:59:28,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:28,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92663607] [2021-06-05 16:59:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:28,257 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 16:59:28,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:28,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92663607] [2021-06-05 16:59:28,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92663607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:28,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292778676] [2021-06-05 16:59:28,258 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 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 16:59:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:28,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:28,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:28,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:28,415 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 16:59:28,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:28,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:28,420 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 16:59:28,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:59:28,442 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 16:59:28,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292778676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:28,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:28,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:28,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407910051] [2021-06-05 16:59:28,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:28,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:28,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:28,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:28,443 INFO L87 Difference]: Start difference. First operand 1599 states and 5465 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) 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 16:59:29,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:29,509 INFO L93 Difference]: Finished difference Result 2462 states and 8155 transitions. [2021-06-05 16:59:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:59:29,510 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) 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 16:59:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:29,513 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 16:59:29,513 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 16:59:29,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 902.7ms TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:59:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 16:59:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1590. [2021-06-05 16:59:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.416614222781624) internal successors, (5429), 1589 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5429 transitions. [2021-06-05 16:59:29,534 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5429 transitions. Word has length 26 [2021-06-05 16:59:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:29,534 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 5429 transitions. [2021-06-05 16:59:29,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) 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 16:59:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5429 transitions. [2021-06-05 16:59:29,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:29,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:29,537 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 16:59:29,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:29,741 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:29,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:29,741 INFO L82 PathProgramCache]: Analyzing trace with hash -107626611, now seen corresponding path program 32 times [2021-06-05 16:59:29,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:29,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381696660] [2021-06-05 16:59:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:29,901 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 16:59:29,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:29,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381696660] [2021-06-05 16:59:29,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381696660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:29,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62124090] [2021-06-05 16:59:29,902 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 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 16:59:29,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:29,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:29,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:59:29,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:30,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:30,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:30,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:30,045 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 29 treesize of output 25 [2021-06-05 16:59:30,046 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:59:30,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:30,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:30,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-06-05 16:59:30,084 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 16:59:30,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62124090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:30,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:30,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:30,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623389170] [2021-06-05 16:59:30,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:30,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:30,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:30,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:30,085 INFO L87 Difference]: Start difference. First operand 1590 states and 5429 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:59:31,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:31,112 INFO L93 Difference]: Finished difference Result 2279 states and 7572 transitions. [2021-06-05 16:59:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:59:31,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 16:59:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:31,119 INFO L225 Difference]: With dead ends: 2279 [2021-06-05 16:59:31,119 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 16:59:31,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:59:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 16:59:31,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1583. [2021-06-05 16:59:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4140328697850824) internal successors, (5401), 1582 states have internal predecessors, (5401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5401 transitions. [2021-06-05 16:59:31,139 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5401 transitions. Word has length 26 [2021-06-05 16:59:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:31,139 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5401 transitions. [2021-06-05 16:59:31,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:59:31,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5401 transitions. [2021-06-05 16:59:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:31,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:31,141 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 16:59:31,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:31,342 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:31,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:31,342 INFO L82 PathProgramCache]: Analyzing trace with hash -714132561, now seen corresponding path program 33 times [2021-06-05 16:59:31,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:31,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180689143] [2021-06-05 16:59:31,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:31,516 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 16:59:31,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:31,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180689143] [2021-06-05 16:59:31,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180689143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:31,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031389682] [2021-06-05 16:59:31,517 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 16:59:31,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:31,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:31,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:59:31,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:31,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:31,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:31,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-06-05 16:59:31,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:31,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:31,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:31,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:3 [2021-06-05 16:59:31,735 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 16:59:31,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031389682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:31,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:31,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:59:31,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829465117] [2021-06-05 16:59:31,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:31,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:31,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:31,736 INFO L87 Difference]: Start difference. First operand 1583 states and 5401 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 16:59:32,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:32,121 INFO L93 Difference]: Finished difference Result 2090 states and 6923 transitions. [2021-06-05 16:59:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:59:32,121 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 16:59:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:32,124 INFO L225 Difference]: With dead ends: 2090 [2021-06-05 16:59:32,124 INFO L226 Difference]: Without dead ends: 2069 [2021-06-05 16:59:32,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 446.9ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:59:32,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-05 16:59:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1559. [2021-06-05 16:59:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 3.4127086007702183) internal successors, (5317), 1558 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 5317 transitions. [2021-06-05 16:59:32,142 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 5317 transitions. Word has length 26 [2021-06-05 16:59:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:32,142 INFO L482 AbstractCegarLoop]: Abstraction has 1559 states and 5317 transitions. [2021-06-05 16:59:32,142 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 16:59:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 5317 transitions. [2021-06-05 16:59:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:32,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:32,144 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 16:59:32,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:32,344 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash -550251037, now seen corresponding path program 34 times [2021-06-05 16:59:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:32,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341707512] [2021-06-05 16:59:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:32,503 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 16:59:32,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:32,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341707512] [2021-06-05 16:59:32,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341707512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:32,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085189216] [2021-06-05 16:59:32,504 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 16:59:32,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:32,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:32,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:32,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:32,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:32,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:32,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-06-05 16:59:32,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:32,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:32,675 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 16:59:32,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:59:32,692 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 16:59:32,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085189216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:32,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:32,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:59:32,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962434707] [2021-06-05 16:59:32,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:32,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:32,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:32,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:32,693 INFO L87 Difference]: Start difference. First operand 1559 states and 5317 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 16:59:33,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:33,171 INFO L93 Difference]: Finished difference Result 2051 states and 6824 transitions. [2021-06-05 16:59:33,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:59:33,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 26 [2021-06-05 16:59:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:33,174 INFO L225 Difference]: With dead ends: 2051 [2021-06-05 16:59:33,174 INFO L226 Difference]: Without dead ends: 2036 [2021-06-05 16:59:33,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 472.1ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:59:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-06-05 16:59:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1558. [2021-06-05 16:59:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 3.41233140655106) internal successors, (5313), 1557 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 5313 transitions. [2021-06-05 16:59:33,191 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 5313 transitions. Word has length 26 [2021-06-05 16:59:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:33,191 INFO L482 AbstractCegarLoop]: Abstraction has 1558 states and 5313 transitions. [2021-06-05 16:59:33,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 16:59:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 5313 transitions. [2021-06-05 16:59:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:33,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:33,193 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 16:59:33,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:33,394 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:33,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:33,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2127183479, now seen corresponding path program 35 times [2021-06-05 16:59:33,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:33,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209547081] [2021-06-05 16:59:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:33,552 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 16:59:33,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:33,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209547081] [2021-06-05 16:59:33,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209547081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:33,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534729921] [2021-06-05 16:59:33,552 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 16:59:33,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:33,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:33,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:59:33,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:33,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:33,718 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 19 treesize of output 19 [2021-06-05 16:59:33,719 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:59:33,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:33,727 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 16:59:33,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 16:59:33,764 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 16:59:33,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534729921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:33,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:33,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:59:33,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473517282] [2021-06-05 16:59:33,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:33,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:33,765 INFO L87 Difference]: Start difference. First operand 1558 states and 5313 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 16:59:34,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:34,410 INFO L93 Difference]: Finished difference Result 2353 states and 7772 transitions. [2021-06-05 16:59:34,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:59:34,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 16:59:34,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:34,413 INFO L225 Difference]: With dead ends: 2353 [2021-06-05 16:59:34,413 INFO L226 Difference]: Without dead ends: 2334 [2021-06-05 16:59:34,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 612.1ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:59:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-06-05 16:59:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1541. [2021-06-05 16:59:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.4103896103896103) internal successors, (5252), 1540 states have internal predecessors, (5252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:34,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5252 transitions. [2021-06-05 16:59:34,433 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5252 transitions. Word has length 26 [2021-06-05 16:59:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:34,434 INFO L482 AbstractCegarLoop]: Abstraction has 1541 states and 5252 transitions. [2021-06-05 16:59:34,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 16:59:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5252 transitions. [2021-06-05 16:59:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:34,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:34,435 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 16:59:34,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:34,636 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:34,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:34,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 36 times [2021-06-05 16:59:34,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:34,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967080321] [2021-06-05 16:59:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:34,765 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 16:59:34,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:34,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967080321] [2021-06-05 16:59:34,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967080321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:34,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687473056] [2021-06-05 16:59:34,765 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 16:59:34,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:34,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:34,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:34,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:34,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:34,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-06-05 16:59:34,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:34,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:34,960 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 16:59:34,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-06-05 16:59:35,014 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 16:59:35,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687473056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:35,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:35,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:59:35,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461482847] [2021-06-05 16:59:35,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:35,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:35,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:35,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:35,015 INFO L87 Difference]: Start difference. First operand 1541 states and 5252 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:59:35,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:35,447 INFO L93 Difference]: Finished difference Result 2055 states and 6840 transitions. [2021-06-05 16:59:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:59:35,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 16:59:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:35,450 INFO L225 Difference]: With dead ends: 2055 [2021-06-05 16:59:35,450 INFO L226 Difference]: Without dead ends: 2040 [2021-06-05 16:59:35,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 458.7ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:59:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-06-05 16:59:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1586. [2021-06-05 16:59:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.404416403785489) internal successors, (5396), 1585 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5396 transitions. [2021-06-05 16:59:35,472 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5396 transitions. Word has length 26 [2021-06-05 16:59:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:35,472 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 5396 transitions. [2021-06-05 16:59:35,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:59:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5396 transitions. [2021-06-05 16:59:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:35,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:35,475 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 16:59:35,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 16:59:35,689 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:35,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:35,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1240114777, now seen corresponding path program 37 times [2021-06-05 16:59:35,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:35,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746640343] [2021-06-05 16:59:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:35,841 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 16:59:35,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746640343] [2021-06-05 16:59:35,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746640343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:35,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187501763] [2021-06-05 16:59:35,842 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 16:59:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:35,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:35,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:36,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:36,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:36,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-06-05 16:59:36,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:36,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:36,044 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 16:59:36,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:59:36,063 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 16:59:36,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187501763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:36,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:36,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:36,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978779537] [2021-06-05 16:59:36,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:36,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:36,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:36,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:36,064 INFO L87 Difference]: Start difference. First operand 1586 states and 5396 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) 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 16:59:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:36,691 INFO L93 Difference]: Finished difference Result 2330 states and 7681 transitions. [2021-06-05 16:59:36,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:59:36,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) 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 16:59:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:36,694 INFO L225 Difference]: With dead ends: 2330 [2021-06-05 16:59:36,694 INFO L226 Difference]: Without dead ends: 2315 [2021-06-05 16:59:36,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 604.7ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:59:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-06-05 16:59:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1587. [2021-06-05 16:59:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.4060529634300125) internal successors, (5402), 1586 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5402 transitions. [2021-06-05 16:59:36,715 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5402 transitions. Word has length 26 [2021-06-05 16:59:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:36,715 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5402 transitions. [2021-06-05 16:59:36,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) 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 16:59:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5402 transitions. [2021-06-05 16:59:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:36,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:36,717 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 16:59:36,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-06-05 16:59:36,918 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:36,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:36,918 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 38 times [2021-06-05 16:59:36,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:36,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369220976] [2021-06-05 16:59:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:37,116 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 16:59:37,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:37,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369220976] [2021-06-05 16:59:37,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369220976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:37,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188862250] [2021-06-05 16:59:37,117 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 16:59:37,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:37,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:37,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:59:37,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:37,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:37,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:37,241 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:59:37,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:37,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:37,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:59:37,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:68 [2021-06-05 16:59:37,337 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 16:59:37,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188862250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:37,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:37,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 16:59:37,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193994557] [2021-06-05 16:59:37,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:59:37,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:37,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:59:37,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:59:37,338 INFO L87 Difference]: Start difference. First operand 1587 states and 5402 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 16:59:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:37,741 INFO L93 Difference]: Finished difference Result 2103 states and 7017 transitions. [2021-06-05 16:59:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:59:37,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 26 [2021-06-05 16:59:37,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:37,744 INFO L225 Difference]: With dead ends: 2103 [2021-06-05 16:59:37,744 INFO L226 Difference]: Without dead ends: 2088 [2021-06-05 16:59:37,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 451.8ms TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:59:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-06-05 16:59:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 1590. [2021-06-05 16:59:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.409691629955947) internal successors, (5418), 1589 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:37,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5418 transitions. [2021-06-05 16:59:37,763 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5418 transitions. Word has length 26 [2021-06-05 16:59:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:37,763 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 5418 transitions. [2021-06-05 16:59:37,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 16:59:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5418 transitions. [2021-06-05 16:59:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:37,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:37,765 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 16:59:37,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 16:59:37,973 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:37,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:37,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 39 times [2021-06-05 16:59:37,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:37,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559464464] [2021-06-05 16:59:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:38,119 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 16:59:38,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:38,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559464464] [2021-06-05 16:59:38,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559464464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:38,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638123595] [2021-06-05 16:59:38,119 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 16:59:38,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:38,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:38,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:59:38,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:38,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:38,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 32 [2021-06-05 16:59:38,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:38,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:38,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:59:38,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:68 [2021-06-05 16:59:38,415 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 16:59:38,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638123595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:38,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:38,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 16:59:38,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073623132] [2021-06-05 16:59:38,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:59:38,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:38,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:59:38,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:59:38,416 INFO L87 Difference]: Start difference. First operand 1590 states and 5418 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 16:59:38,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:38,741 INFO L93 Difference]: Finished difference Result 2135 states and 7120 transitions. [2021-06-05 16:59:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:59:38,742 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 26 [2021-06-05 16:59:38,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:38,744 INFO L225 Difference]: With dead ends: 2135 [2021-06-05 16:59:38,744 INFO L226 Difference]: Without dead ends: 2120 [2021-06-05 16:59:38,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:59:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-06-05 16:59:38,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1608. [2021-06-05 16:59:38,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 3.4051026757934038) internal successors, (5472), 1607 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5472 transitions. [2021-06-05 16:59:38,764 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5472 transitions. Word has length 26 [2021-06-05 16:59:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:38,764 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5472 transitions. [2021-06-05 16:59:38,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 16:59:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5472 transitions. [2021-06-05 16:59:38,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:38,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:38,766 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 16:59:38,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:38,967 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:38,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 40 times [2021-06-05 16:59:38,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:38,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738987110] [2021-06-05 16:59:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:39,102 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 16:59:39,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:39,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738987110] [2021-06-05 16:59:39,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738987110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:39,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305328022] [2021-06-05 16:59:39,102 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 16:59:39,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:39,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:39,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:39,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:39,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:39,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:39,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-06-05 16:59:39,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:39,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:39,269 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 16:59:39,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 16:59:39,285 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 16:59:39,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305328022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:39,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:39,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:59:39,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441178125] [2021-06-05 16:59:39,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:39,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:39,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:39,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:39,286 INFO L87 Difference]: Start difference. First operand 1608 states and 5472 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 16:59:39,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:39,733 INFO L93 Difference]: Finished difference Result 2064 states and 6890 transitions. [2021-06-05 16:59:39,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:59:39,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 26 [2021-06-05 16:59:39,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:39,736 INFO L225 Difference]: With dead ends: 2064 [2021-06-05 16:59:39,736 INFO L226 Difference]: Without dead ends: 2049 [2021-06-05 16:59:39,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:59:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-06-05 16:59:39,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1629. [2021-06-05 16:59:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.401105651105651) internal successors, (5537), 1628 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5537 transitions. [2021-06-05 16:59:39,755 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5537 transitions. Word has length 26 [2021-06-05 16:59:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:39,755 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 5537 transitions. [2021-06-05 16:59:39,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 16:59:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5537 transitions. [2021-06-05 16:59:39,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:39,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:39,757 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 16:59:39,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:39,959 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 41 times [2021-06-05 16:59:39,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:39,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799889519] [2021-06-05 16:59:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:40,098 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 16:59:40,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:40,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799889519] [2021-06-05 16:59:40,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799889519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:40,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113302292] [2021-06-05 16:59:40,098 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 16:59:40,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:40,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:40,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:59:40,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:40,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:40,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:40,263 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 19 treesize of output 19 [2021-06-05 16:59:40,264 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:59:40,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:40,272 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 16:59:40,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 16:59:40,309 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 16:59:40,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113302292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:40,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:40,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:59:40,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709860951] [2021-06-05 16:59:40,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:40,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:40,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:40,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:40,310 INFO L87 Difference]: Start difference. First operand 1629 states and 5537 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 16:59:40,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:40,858 INFO L93 Difference]: Finished difference Result 2357 states and 7803 transitions. [2021-06-05 16:59:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:59:40,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 26 [2021-06-05 16:59:40,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:40,862 INFO L225 Difference]: With dead ends: 2357 [2021-06-05 16:59:40,862 INFO L226 Difference]: Without dead ends: 2342 [2021-06-05 16:59:40,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:59:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-06-05 16:59:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1626. [2021-06-05 16:59:40,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.4024615384615386) internal successors, (5529), 1625 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:40,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5529 transitions. [2021-06-05 16:59:40,883 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5529 transitions. Word has length 26 [2021-06-05 16:59:40,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:40,883 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5529 transitions. [2021-06-05 16:59:40,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 16:59:40,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5529 transitions. [2021-06-05 16:59:40,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:40,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:40,885 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 16:59:41,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:41,107 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:41,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:41,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 42 times [2021-06-05 16:59:41,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:41,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730567247] [2021-06-05 16:59:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:41,245 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 16:59:41,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:41,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730567247] [2021-06-05 16:59:41,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730567247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:41,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055829326] [2021-06-05 16:59:41,246 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 16:59:41,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:41,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:41,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:59:41,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:41,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:41,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:41,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-06-05 16:59:41,387 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:59:41,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:41,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:41,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 16:59:41,432 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 16:59:41,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055829326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:41,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:41,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:41,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850700185] [2021-06-05 16:59:41,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:41,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:41,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:41,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:41,433 INFO L87 Difference]: Start difference. First operand 1626 states and 5529 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 16:59:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:41,960 INFO L93 Difference]: Finished difference Result 2213 states and 7343 transitions. [2021-06-05 16:59:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:59:41,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 16:59:41,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:41,963 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 16:59:41,963 INFO L226 Difference]: Without dead ends: 2188 [2021-06-05 16:59:41,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:59:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-06-05 16:59:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1626. [2021-06-05 16:59:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.404923076923077) internal successors, (5533), 1625 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5533 transitions. [2021-06-05 16:59:41,987 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5533 transitions. Word has length 26 [2021-06-05 16:59:41,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:41,987 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5533 transitions. [2021-06-05 16:59:41,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 16:59:41,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5533 transitions. [2021-06-05 16:59:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:41,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:41,989 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 16:59:42,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:42,195 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 43 times [2021-06-05 16:59:42,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:42,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492233255] [2021-06-05 16:59:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:42,363 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 16:59:42,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:42,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492233255] [2021-06-05 16:59:42,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492233255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:42,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126670668] [2021-06-05 16:59:42,364 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 16:59:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:42,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:42,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:42,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:42,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:42,529 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 19 treesize of output 19 [2021-06-05 16:59:42,530 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:59:42,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:42,540 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 16:59:42,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 16:59:42,583 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 16:59:42,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126670668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:42,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:42,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:59:42,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532092209] [2021-06-05 16:59:42,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:42,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:42,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:42,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:42,586 INFO L87 Difference]: Start difference. First operand 1626 states and 5533 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 16:59:42,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:42,969 INFO L93 Difference]: Finished difference Result 2137 states and 7136 transitions. [2021-06-05 16:59:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:59:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 26 [2021-06-05 16:59:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:42,972 INFO L225 Difference]: With dead ends: 2137 [2021-06-05 16:59:42,972 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 16:59:42,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:59:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 16:59:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1626. [2021-06-05 16:59:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.404923076923077) internal successors, (5533), 1625 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5533 transitions. [2021-06-05 16:59:42,992 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5533 transitions. Word has length 26 [2021-06-05 16:59:42,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:42,992 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5533 transitions. [2021-06-05 16:59:42,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 16:59:42,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5533 transitions. [2021-06-05 16:59:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:42,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:42,995 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 16:59:43,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:43,217 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1743994595, now seen corresponding path program 55 times [2021-06-05 16:59:43,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:43,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701738883] [2021-06-05 16:59:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:43,393 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 16:59:43,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:43,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701738883] [2021-06-05 16:59:43,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701738883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:43,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854340369] [2021-06-05 16:59:43,393 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 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 16:59:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:43,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:59:43,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:43,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:43,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:43,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:43,535 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 21 treesize of output 11 [2021-06-05 16:59:43,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:43,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:43,542 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 16:59:43,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:59:43,565 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 16:59:43,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854340369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:43,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:43,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 16:59:43,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920766052] [2021-06-05 16:59:43,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:43,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:43,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:43,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:43,567 INFO L87 Difference]: Start difference. First operand 1626 states and 5533 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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 16:59:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:43,874 INFO L93 Difference]: Finished difference Result 2071 states and 6841 transitions. [2021-06-05 16:59:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:59:43,874 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 26 [2021-06-05 16:59:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:43,877 INFO L225 Difference]: With dead ends: 2071 [2021-06-05 16:59:43,877 INFO L226 Difference]: Without dead ends: 2045 [2021-06-05 16:59:43,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 381.4ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:59:43,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-06-05 16:59:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1620. [2021-06-05 16:59:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4033353922174183) internal successors, (5510), 1619 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5510 transitions. [2021-06-05 16:59:43,897 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5510 transitions. Word has length 26 [2021-06-05 16:59:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:43,897 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5510 transitions. [2021-06-05 16:59:43,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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 16:59:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5510 transitions. [2021-06-05 16:59:43,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:43,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:43,899 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 16:59:44,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:44,099 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:44,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:44,099 INFO L82 PathProgramCache]: Analyzing trace with hash 469684583, now seen corresponding path program 56 times [2021-06-05 16:59:44,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:44,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269564322] [2021-06-05 16:59:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:44,310 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 16:59:44,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:44,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269564322] [2021-06-05 16:59:44,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269564322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:44,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292509458] [2021-06-05 16:59:44,311 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 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 16:59:44,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:44,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:44,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:59:44,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:44,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:44,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:44,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:44,436 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 21 treesize of output 11 [2021-06-05 16:59:44,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:44,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:44,441 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 16:59:44,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:59:44,459 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 16:59:44,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292509458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:44,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:44,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 16:59:44,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402742819] [2021-06-05 16:59:44,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:44,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:44,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:44,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:44,460 INFO L87 Difference]: Start difference. First operand 1620 states and 5510 transitions. Second operand has 16 states, 16 states have (on average 2.5625) 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 16:59:45,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:45,002 INFO L93 Difference]: Finished difference Result 2277 states and 7481 transitions. [2021-06-05 16:59:45,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:59:45,003 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) 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 26 [2021-06-05 16:59:45,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:45,006 INFO L225 Difference]: With dead ends: 2277 [2021-06-05 16:59:45,006 INFO L226 Difference]: Without dead ends: 2262 [2021-06-05 16:59:45,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 608.9ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:59:45,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-05 16:59:45,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1610. [2021-06-05 16:59:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 3.403977625854568) internal successors, (5477), 1609 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5477 transitions. [2021-06-05 16:59:45,026 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5477 transitions. Word has length 26 [2021-06-05 16:59:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:45,026 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5477 transitions. [2021-06-05 16:59:45,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) 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 16:59:45,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5477 transitions. [2021-06-05 16:59:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:45,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:45,028 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 16:59:45,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 16:59:45,228 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:45,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 57 times [2021-06-05 16:59:45,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:45,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531965842] [2021-06-05 16:59:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:45,376 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 16:59:45,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:45,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531965842] [2021-06-05 16:59:45,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531965842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:45,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563136116] [2021-06-05 16:59:45,377 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 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 16:59:45,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:45,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:45,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:45,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:45,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:45,633 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 16:59:45,633 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 50 [2021-06-05 16:59:45,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:45,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:45,641 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 16:59:45,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:3 [2021-06-05 16:59:45,656 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 16:59:45,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563136116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:45,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:45,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:45,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603980578] [2021-06-05 16:59:45,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:59:45,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:45,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:59:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:59:45,657 INFO L87 Difference]: Start difference. First operand 1610 states and 5477 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 16:59:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:46,505 INFO L93 Difference]: Finished difference Result 2271 states and 7307 transitions. [2021-06-05 16:59:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:59:46,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 26 [2021-06-05 16:59:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:46,508 INFO L225 Difference]: With dead ends: 2271 [2021-06-05 16:59:46,508 INFO L226 Difference]: Without dead ends: 2241 [2021-06-05 16:59:46,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:59:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-06-05 16:59:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1631. [2021-06-05 16:59:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.399386503067485) internal successors, (5541), 1630 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5541 transitions. [2021-06-05 16:59:46,529 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5541 transitions. Word has length 26 [2021-06-05 16:59:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:46,529 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5541 transitions. [2021-06-05 16:59:46,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 16:59:46,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5541 transitions. [2021-06-05 16:59:46,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:46,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:46,531 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 16:59:46,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 16:59:46,731 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:46,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1778959663, now seen corresponding path program 58 times [2021-06-05 16:59:46,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:46,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911599435] [2021-06-05 16:59:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:46,891 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 16:59:46,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:46,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911599435] [2021-06-05 16:59:46,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911599435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:46,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907194397] [2021-06-05 16:59:46,891 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 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 16:59:46,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:46,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:46,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:59:46,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:47,003 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 19 treesize of output 11 [2021-06-05 16:59:47,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:47,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:47,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:47,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 16:59:47,019 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 16:59:47,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907194397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:47,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:47,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 16:59:47,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900930373] [2021-06-05 16:59:47,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:47,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:47,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:47,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:47,020 INFO L87 Difference]: Start difference. First operand 1631 states and 5541 transitions. Second operand has 16 states, 16 states have (on average 2.625) 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 16:59:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:47,414 INFO L93 Difference]: Finished difference Result 2135 states and 7023 transitions. [2021-06-05 16:59:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:59:47,414 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) 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 26 [2021-06-05 16:59:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:47,417 INFO L225 Difference]: With dead ends: 2135 [2021-06-05 16:59:47,417 INFO L226 Difference]: Without dead ends: 2113 [2021-06-05 16:59:47,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 410.0ms TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:59:47,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-05 16:59:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1631. [2021-06-05 16:59:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.399386503067485) internal successors, (5541), 1630 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5541 transitions. [2021-06-05 16:59:47,437 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5541 transitions. Word has length 26 [2021-06-05 16:59:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:47,437 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5541 transitions. [2021-06-05 16:59:47,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) 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 16:59:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5541 transitions. [2021-06-05 16:59:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:47,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:47,439 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 16:59:47,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 16:59:47,640 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:47,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:47,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 59 times [2021-06-05 16:59:47,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:47,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047051518] [2021-06-05 16:59:47,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:47,833 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 16:59:47,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:47,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047051518] [2021-06-05 16:59:47,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047051518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:47,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041404352] [2021-06-05 16:59:47,834 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 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 16:59:47,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:47,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:47,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:59:47,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:47,989 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 19 treesize of output 11 [2021-06-05 16:59:47,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:47,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:47,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:47,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 16:59:48,010 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 16:59:48,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041404352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:48,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:48,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:59:48,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434989595] [2021-06-05 16:59:48,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:48,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:48,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:48,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:48,011 INFO L87 Difference]: Start difference. First operand 1631 states and 5541 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 16:59:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:48,421 INFO L93 Difference]: Finished difference Result 2023 states and 6745 transitions. [2021-06-05 16:59:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:59:48,421 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 26 [2021-06-05 16:59:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:48,425 INFO L225 Difference]: With dead ends: 2023 [2021-06-05 16:59:48,425 INFO L226 Difference]: Without dead ends: 1992 [2021-06-05 16:59:48,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:59:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-05 16:59:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1637. [2021-06-05 16:59:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.3973105134474326) internal successors, (5558), 1636 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5558 transitions. [2021-06-05 16:59:48,452 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5558 transitions. Word has length 26 [2021-06-05 16:59:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:48,452 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 5558 transitions. [2021-06-05 16:59:48,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 16:59:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5558 transitions. [2021-06-05 16:59:48,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:48,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:48,454 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] [2021-06-05 16:59:48,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:48,655 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:48,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:48,655 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 60 times [2021-06-05 16:59:48,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:48,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213747857] [2021-06-05 16:59:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:48,783 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 16:59:48,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:48,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213747857] [2021-06-05 16:59:48,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213747857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:48,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545697620] [2021-06-05 16:59:48,783 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 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 16:59:48,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:59:48,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:48,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:59:48,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:48,890 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 19 treesize of output 11 [2021-06-05 16:59:48,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:48,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:48,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:48,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 16:59:48,910 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 16:59:48,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545697620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:48,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:48,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 16:59:48,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393204388] [2021-06-05 16:59:48,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:59:48,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:48,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:59:48,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:59:48,911 INFO L87 Difference]: Start difference. First operand 1637 states and 5558 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 16:59:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:49,262 INFO L93 Difference]: Finished difference Result 2057 states and 6834 transitions. [2021-06-05 16:59:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:59:49,262 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 26 [2021-06-05 16:59:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:49,265 INFO L225 Difference]: With dead ends: 2057 [2021-06-05 16:59:49,265 INFO L226 Difference]: Without dead ends: 2042 [2021-06-05 16:59:49,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:59:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-06-05 16:59:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1637. [2021-06-05 16:59:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.3973105134474326) internal successors, (5558), 1636 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5558 transitions. [2021-06-05 16:59:49,284 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5558 transitions. Word has length 26 [2021-06-05 16:59:49,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:49,284 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 5558 transitions. [2021-06-05 16:59:49,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 16:59:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5558 transitions. [2021-06-05 16:59:49,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:49,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:49,286 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 16:59:49,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 16:59:49,488 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:49,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:49,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 44 times [2021-06-05 16:59:49,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:49,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865262514] [2021-06-05 16:59:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:49,648 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 16:59:49,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:49,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865262514] [2021-06-05 16:59:49,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865262514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:49,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749555008] [2021-06-05 16:59:49,648 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 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 16:59:49,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:49,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:49,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:59:49,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:49,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:49,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:49,784 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 19 treesize of output 19 [2021-06-05 16:59:49,785 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:59:49,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:49,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:49,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 16:59:49,823 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 16:59:49,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749555008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:49,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:49,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:59:49,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036960633] [2021-06-05 16:59:49,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:49,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:49,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:49,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:49,824 INFO L87 Difference]: Start difference. First operand 1637 states and 5558 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 16:59:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:51,052 INFO L93 Difference]: Finished difference Result 2310 states and 7570 transitions. [2021-06-05 16:59:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:59:51,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 16:59:51,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:51,055 INFO L225 Difference]: With dead ends: 2310 [2021-06-05 16:59:51,055 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 16:59:51,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 899.0ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:59:51,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 16:59:51,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1638. [2021-06-05 16:59:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.392791692119731) internal successors, (5554), 1637 states have internal predecessors, (5554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5554 transitions. [2021-06-05 16:59:51,075 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5554 transitions. Word has length 26 [2021-06-05 16:59:51,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:51,076 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5554 transitions. [2021-06-05 16:59:51,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 16:59:51,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5554 transitions. [2021-06-05 16:59:51,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:51,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:51,078 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 16:59:51,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 16:59:51,278 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:51,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:51,278 INFO L82 PathProgramCache]: Analyzing trace with hash -659260211, now seen corresponding path program 61 times [2021-06-05 16:59:51,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:51,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774819134] [2021-06-05 16:59:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:51,378 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 16:59:51,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:51,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774819134] [2021-06-05 16:59:51,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774819134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:51,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387441389] [2021-06-05 16:59:51,378 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 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 16:59:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:51,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:51,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:51,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:51,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:51,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:51,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:59:51,535 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 21 treesize of output 11 [2021-06-05 16:59:51,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:59:51,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:51,540 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 16:59:51,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 16:59:51,553 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 16:59:51,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387441389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:51,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:51,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:59:51,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329946795] [2021-06-05 16:59:51,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:51,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:51,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:51,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:51,554 INFO L87 Difference]: Start difference. First operand 1638 states and 5554 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) 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 16:59:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:52,368 INFO L93 Difference]: Finished difference Result 2717 states and 8732 transitions. [2021-06-05 16:59:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:59:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 26 [2021-06-05 16:59:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:52,372 INFO L225 Difference]: With dead ends: 2717 [2021-06-05 16:59:52,372 INFO L226 Difference]: Without dead ends: 2695 [2021-06-05 16:59:52,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:59:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-06-05 16:59:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1680. [2021-06-05 16:59:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.4032162001191186) internal successors, (5714), 1679 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5714 transitions. [2021-06-05 16:59:52,411 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5714 transitions. Word has length 26 [2021-06-05 16:59:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:52,411 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5714 transitions. [2021-06-05 16:59:52,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) 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 16:59:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5714 transitions. [2021-06-05 16:59:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:52,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:52,413 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 16:59:52,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:52,614 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:52,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:52,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 62 times [2021-06-05 16:59:52,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:52,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523307059] [2021-06-05 16:59:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:52,746 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 16:59:52,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:52,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523307059] [2021-06-05 16:59:52,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523307059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:52,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124126229] [2021-06-05 16:59:52,746 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 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 16:59:52,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:59:52,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:52,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:59:52,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:52,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:52,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:52,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:52,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:52,884 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 25 treesize of output 43 [2021-06-05 16:59:52,890 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:59:52,902 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-06-05 16:59:52,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:59:52,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 16:59:52,943 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 16:59:52,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124126229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:52,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:52,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:59:52,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374840903] [2021-06-05 16:59:52,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:52,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:52,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:52,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:52,944 INFO L87 Difference]: Start difference. First operand 1680 states and 5714 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) 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 16:59:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:54,319 INFO L93 Difference]: Finished difference Result 3323 states and 10531 transitions. [2021-06-05 16:59:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:59:54,319 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 16:59:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:54,323 INFO L225 Difference]: With dead ends: 3323 [2021-06-05 16:59:54,323 INFO L226 Difference]: Without dead ends: 3279 [2021-06-05 16:59:54,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 994.1ms TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:59:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-06-05 16:59:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 1708. [2021-06-05 16:59:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.4106619800820153) internal successors, (5822), 1707 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5822 transitions. [2021-06-05 16:59:54,350 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5822 transitions. Word has length 26 [2021-06-05 16:59:54,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:54,350 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5822 transitions. [2021-06-05 16:59:54,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 16:59:54,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5822 transitions. [2021-06-05 16:59:54,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:54,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:54,352 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 16:59:54,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:54,552 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:54,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:54,553 INFO L82 PathProgramCache]: Analyzing trace with hash -32178733, now seen corresponding path program 45 times [2021-06-05 16:59:54,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:54,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760205584] [2021-06-05 16:59:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:54,710 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 16:59:54,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760205584] [2021-06-05 16:59:54,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760205584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548940577] [2021-06-05 16:59:54,710 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 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 16:59:54,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:59:54,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:59:54,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:54,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:54,968 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 16:59:54,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:55,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:55,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:59:55,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:150 [2021-06-05 16:59:55,175 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 16:59:55,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548940577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:55,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:55,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:59:55,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716846873] [2021-06-05 16:59:55,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:55,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:55,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:55,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:55,176 INFO L87 Difference]: Start difference. First operand 1708 states and 5822 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:59:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:56,892 INFO L93 Difference]: Finished difference Result 2381 states and 7796 transitions. [2021-06-05 16:59:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:59:56,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 16:59:56,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:56,895 INFO L225 Difference]: With dead ends: 2381 [2021-06-05 16:59:56,895 INFO L226 Difference]: Without dead ends: 2366 [2021-06-05 16:59:56,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1331.5ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:59:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-06-05 16:59:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 1721. [2021-06-05 16:59:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.4069767441860463) internal successors, (5860), 1720 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5860 transitions. [2021-06-05 16:59:56,916 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5860 transitions. Word has length 26 [2021-06-05 16:59:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:56,916 INFO L482 AbstractCegarLoop]: Abstraction has 1721 states and 5860 transitions. [2021-06-05 16:59:56,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:59:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5860 transitions. [2021-06-05 16:59:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:56,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:56,919 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 16:59:57,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 16:59:57,121 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:57,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1649711513, now seen corresponding path program 46 times [2021-06-05 16:59:57,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:57,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760544813] [2021-06-05 16:59:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:57,266 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 16:59:57,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:57,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760544813] [2021-06-05 16:59:57,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760544813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:57,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544194219] [2021-06-05 16:59:57,266 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 16:59:57,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:59:57,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:57,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:59:57,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:57,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:57,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:57,409 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 19 treesize of output 19 [2021-06-05 16:59:57,410 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:59:57,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:57,418 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 16:59:57,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 16:59:57,453 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 16:59:57,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544194219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:57,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:57,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:59:57,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094829590] [2021-06-05 16:59:57,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:59:57,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:57,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:59:57,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:59:57,454 INFO L87 Difference]: Start difference. First operand 1721 states and 5860 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:59:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:58,287 INFO L93 Difference]: Finished difference Result 2557 states and 8457 transitions. [2021-06-05 16:59:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:59:58,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 16:59:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:58,291 INFO L225 Difference]: With dead ends: 2557 [2021-06-05 16:59:58,291 INFO L226 Difference]: Without dead ends: 2542 [2021-06-05 16:59:58,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 584.2ms TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:59:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-06-05 16:59:58,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1724. [2021-06-05 16:59:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.4062681369704007) internal successors, (5869), 1723 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5869 transitions. [2021-06-05 16:59:58,313 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5869 transitions. Word has length 26 [2021-06-05 16:59:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:58,314 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 5869 transitions. [2021-06-05 16:59:58,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:59:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5869 transitions. [2021-06-05 16:59:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:58,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:58,316 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, 1, 1] [2021-06-05 16:59:58,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:59:58,516 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:58,516 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 47 times [2021-06-05 16:59:58,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:58,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126058061] [2021-06-05 16:59:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:58,643 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 16:59:58,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:58,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126058061] [2021-06-05 16:59:58,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126058061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:58,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686135219] [2021-06-05 16:59:58,643 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 16:59:58,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:59:58,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:59:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:59:58,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:59:58,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:59:58,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:58,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-06-05 16:59:58,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:59:58,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:59:58,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:59:58,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:71 [2021-06-05 16:59:58,917 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 16:59:58,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686135219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:58,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:59:58,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:59:58,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174361606] [2021-06-05 16:59:58,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:59:58,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:59:58,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:59:58,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:59:58,918 INFO L87 Difference]: Start difference. First operand 1724 states and 5869 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 16:59:59,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:59:59,631 INFO L93 Difference]: Finished difference Result 2476 states and 8179 transitions. [2021-06-05 16:59:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:59:59,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 26 [2021-06-05 16:59:59,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:59:59,634 INFO L225 Difference]: With dead ends: 2476 [2021-06-05 16:59:59,634 INFO L226 Difference]: Without dead ends: 2451 [2021-06-05 16:59:59,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 607.6ms TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:59:59,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-05 16:59:59,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1710. [2021-06-05 16:59:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.4119368051492103) internal successors, (5831), 1709 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:59:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5831 transitions. [2021-06-05 16:59:59,655 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5831 transitions. Word has length 26 [2021-06-05 16:59:59,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:59:59,655 INFO L482 AbstractCegarLoop]: Abstraction has 1710 states and 5831 transitions. [2021-06-05 16:59:59,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 16:59:59,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5831 transitions. [2021-06-05 16:59:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:59:59,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:59:59,657 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 16:59:59,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-06-05 16:59:59,858 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:59:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:59:59,858 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 63 times [2021-06-05 16:59:59,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:59:59,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136178762] [2021-06-05 16:59:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:59:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:59:59,976 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 16:59:59,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:59:59,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136178762] [2021-06-05 16:59:59,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136178762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:59:59,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987653570] [2021-06-05 16:59:59,976 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 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 17:00:00,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:00:00,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:00,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:00:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:00,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:00,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:00:00,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:00:00,125 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 21 treesize of output 11 [2021-06-05 17:00:00,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:00,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:00,130 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 17:00:00,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:00:00,144 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 17:00:00,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987653570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:00,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:00,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:00:00,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898490091] [2021-06-05 17:00:00,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:00,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:00,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:00,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:00,145 INFO L87 Difference]: Start difference. First operand 1710 states and 5831 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 17:00:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:00,957 INFO L93 Difference]: Finished difference Result 2583 states and 8404 transitions. [2021-06-05 17:00:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:00:00,958 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 26 [2021-06-05 17:00:00,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:00,961 INFO L225 Difference]: With dead ends: 2583 [2021-06-05 17:00:00,961 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 17:00:00,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 592.0ms TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:00:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 17:00:00,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1766. [2021-06-05 17:00:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 3.405665722379603) internal successors, (6011), 1765 states have internal predecessors, (6011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 6011 transitions. [2021-06-05 17:00:00,984 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 6011 transitions. Word has length 26 [2021-06-05 17:00:00,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:00,984 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 6011 transitions. [2021-06-05 17:00:00,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 17:00:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 6011 transitions. [2021-06-05 17:00:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:00:00,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:00,986 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 17:00:01,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:01,187 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:01,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:01,187 INFO L82 PathProgramCache]: Analyzing trace with hash 402208991, now seen corresponding path program 64 times [2021-06-05 17:00:01,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:01,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820150838] [2021-06-05 17:00:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:01,340 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 17:00:01,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:01,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820150838] [2021-06-05 17:00:01,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820150838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:01,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168691955] [2021-06-05 17:00:01,341 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 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 17:00:01,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:01,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:01,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:00:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:01,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:00:01,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:01,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:00:01,508 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 21 treesize of output 11 [2021-06-05 17:00:01,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:01,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:01,513 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 17:00:01,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:00:01,531 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 17:00:01,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168691955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:01,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:01,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:00:01,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670876934] [2021-06-05 17:00:01,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:00:01,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:00:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:00:01,532 INFO L87 Difference]: Start difference. First operand 1766 states and 6011 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 17:00:02,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:02,540 INFO L93 Difference]: Finished difference Result 2816 states and 9179 transitions. [2021-06-05 17:00:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:00:02,541 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 17:00:02,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:02,544 INFO L225 Difference]: With dead ends: 2816 [2021-06-05 17:00:02,544 INFO L226 Difference]: Without dead ends: 2794 [2021-06-05 17:00:02,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 864.7ms TimeCoverageRelationStatistics Valid=410, Invalid=1482, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:00:02,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-06-05 17:00:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1780. [2021-06-05 17:00:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 3.3991006183249017) internal successors, (6047), 1779 states have internal predecessors, (6047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 6047 transitions. [2021-06-05 17:00:02,569 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 6047 transitions. Word has length 26 [2021-06-05 17:00:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:02,570 INFO L482 AbstractCegarLoop]: Abstraction has 1780 states and 6047 transitions. [2021-06-05 17:00:02,570 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 17:00:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 6047 transitions. [2021-06-05 17:00:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:00:02,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:02,573 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 17:00:02,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 17:00:02,789 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:02,789 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 65 times [2021-06-05 17:00:02,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:02,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848954717] [2021-06-05 17:00:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:02,951 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 17:00:02,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:02,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848954717] [2021-06-05 17:00:02,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848954717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:02,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5510882] [2021-06-05 17:00:02,951 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 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 17:00:02,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:00:02,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:02,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:00:02,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:03,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:00:03,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:03,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:03,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:00:03,169 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 21 treesize of output 11 [2021-06-05 17:00:03,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:03,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:03,176 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 17:00:03,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:00:03,200 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 17:00:03,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5510882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:03,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:03,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:00:03,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947168730] [2021-06-05 17:00:03,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:00:03,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:03,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:00:03,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:00:03,204 INFO L87 Difference]: Start difference. First operand 1780 states and 6047 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 17:00:04,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:04,110 INFO L93 Difference]: Finished difference Result 2668 states and 8760 transitions. [2021-06-05 17:00:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:00:04,111 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 17:00:04,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:04,115 INFO L225 Difference]: With dead ends: 2668 [2021-06-05 17:00:04,115 INFO L226 Difference]: Without dead ends: 2649 [2021-06-05 17:00:04,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 773.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:00:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-06-05 17:00:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 1789. [2021-06-05 17:00:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 3.402684563758389) internal successors, (6084), 1788 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 6084 transitions. [2021-06-05 17:00:04,143 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 6084 transitions. Word has length 26 [2021-06-05 17:00:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:04,144 INFO L482 AbstractCegarLoop]: Abstraction has 1789 states and 6084 transitions. [2021-06-05 17:00:04,144 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 17:00:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 6084 transitions. [2021-06-05 17:00:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:00:04,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:04,147 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 17:00:04,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:04,370 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:04,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:04,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1928409045, now seen corresponding path program 48 times [2021-06-05 17:00:04,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:04,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14827748] [2021-06-05 17:00:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:04,555 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 17:00:04,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:04,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14827748] [2021-06-05 17:00:04,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14827748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:04,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068506065] [2021-06-05 17:00:04,555 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 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 17:00:04,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:04,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:04,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:00:04,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:04,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:04,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-06-05 17:00:04,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:00:04,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:04,760 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 17:00:04,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:75 [2021-06-05 17:00:04,883 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 17:00:04,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068506065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:04,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:04,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 17:00:04,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090955476] [2021-06-05 17:00:04,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:00:04,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:04,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:00:04,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:00:04,884 INFO L87 Difference]: Start difference. First operand 1789 states and 6084 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:00:06,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:06,084 INFO L93 Difference]: Finished difference Result 2769 states and 9024 transitions. [2021-06-05 17:00:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:00:06,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 17:00:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:06,088 INFO L225 Difference]: With dead ends: 2769 [2021-06-05 17:00:06,088 INFO L226 Difference]: Without dead ends: 2754 [2021-06-05 17:00:06,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 960.4ms TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:00:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-06-05 17:00:06,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 1789. [2021-06-05 17:00:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 3.3982102908277403) internal successors, (6076), 1788 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 6076 transitions. [2021-06-05 17:00:06,123 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 6076 transitions. Word has length 26 [2021-06-05 17:00:06,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:06,123 INFO L482 AbstractCegarLoop]: Abstraction has 1789 states and 6076 transitions. [2021-06-05 17:00:06,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:00:06,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 6076 transitions. [2021-06-05 17:00:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:00:06,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:06,126 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 17:00:06,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:06,349 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:06,350 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 49 times [2021-06-05 17:00:06,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:06,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196979135] [2021-06-05 17:00:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:06,494 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 17:00:06,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:06,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196979135] [2021-06-05 17:00:06,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196979135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:06,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708939263] [2021-06-05 17:00:06,495 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 17:00:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:06,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:00:06,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:06,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:06,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:06,655 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 19 treesize of output 19 [2021-06-05 17:00:06,656 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:00:06,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:06,664 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 17:00:06,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:00:06,700 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 17:00:06,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708939263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:06,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:06,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:00:06,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117065662] [2021-06-05 17:00:06,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:00:06,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:06,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:00:06,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:00:06,701 INFO L87 Difference]: Start difference. First operand 1789 states and 6076 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:00:07,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:07,233 INFO L93 Difference]: Finished difference Result 2442 states and 8101 transitions. [2021-06-05 17:00:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:00:07,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 17:00:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:07,236 INFO L225 Difference]: With dead ends: 2442 [2021-06-05 17:00:07,236 INFO L226 Difference]: Without dead ends: 2417 [2021-06-05 17:00:07,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 442.1ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:00:07,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-06-05 17:00:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1783. [2021-06-05 17:00:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.3956228956228958) internal successors, (6051), 1782 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6051 transitions. [2021-06-05 17:00:07,267 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6051 transitions. Word has length 26 [2021-06-05 17:00:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:07,267 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6051 transitions. [2021-06-05 17:00:07,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:00:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6051 transitions. [2021-06-05 17:00:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:00:07,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:07,270 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 17:00:07,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:07,494 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:07,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:07,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1815461431, now seen corresponding path program 50 times [2021-06-05 17:00:07,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:07,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818837771] [2021-06-05 17:00:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:07,651 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 17:00:07,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:07,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818837771] [2021-06-05 17:00:07,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818837771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:07,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501752981] [2021-06-05 17:00:07,651 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 17:00:07,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:07,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:07,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:00:07,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:07,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:07,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:07,792 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 19 treesize of output 19 [2021-06-05 17:00:07,793 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:00:07,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:07,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:00:07,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 17:00:07,832 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 17:00:07,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501752981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:07,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:07,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:00:07,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529251197] [2021-06-05 17:00:07,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:00:07,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:07,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:00:07,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:00:07,833 INFO L87 Difference]: Start difference. First operand 1783 states and 6051 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:00:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:08,711 INFO L93 Difference]: Finished difference Result 2378 states and 7896 transitions. [2021-06-05 17:00:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:00:08,711 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 17:00:08,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:08,714 INFO L225 Difference]: With dead ends: 2378 [2021-06-05 17:00:08,714 INFO L226 Difference]: Without dead ends: 2363 [2021-06-05 17:00:08,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:00:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-06-05 17:00:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1772. [2021-06-05 17:00:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.399209486166008) internal successors, (6020), 1771 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 17:00:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 6020 transitions. [2021-06-05 17:00:08,738 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 6020 transitions. Word has length 26 [2021-06-05 17:00:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:08,738 INFO L482 AbstractCegarLoop]: Abstraction has 1772 states and 6020 transitions. [2021-06-05 17:00:08,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:00:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 6020 transitions. [2021-06-05 17:00:08,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:00:08,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:08,741 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 17:00:08,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:08,941 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:08,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 51 times [2021-06-05 17:00:08,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:08,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026222833] [2021-06-05 17:00:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:09,106 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 17:00:09,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:09,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026222833] [2021-06-05 17:00:09,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026222833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:09,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470161731] [2021-06-05 17:00:09,106 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 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 17:00:09,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:00:09,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:09,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:00:09,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:09,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:09,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:09,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-06-05 17:00:09,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:00:09,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:09,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:00:09,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:71 [2021-06-05 17:00:09,383 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 17:00:09,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470161731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:09,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:09,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:00:09,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868001549] [2021-06-05 17:00:09,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:00:09,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:09,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:00:09,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:00:09,384 INFO L87 Difference]: Start difference. First operand 1772 states and 6020 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:00:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:09,903 INFO L93 Difference]: Finished difference Result 2374 states and 7919 transitions. [2021-06-05 17:00:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:00:09,904 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 17:00:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:09,907 INFO L225 Difference]: With dead ends: 2374 [2021-06-05 17:00:09,907 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 17:00:09,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:00:09,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 17:00:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 1783. [2021-06-05 17:00:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.4079685746352415) internal successors, (6073), 1782 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 17:00:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6073 transitions. [2021-06-05 17:00:09,929 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6073 transitions. Word has length 26 [2021-06-05 17:00:09,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:09,929 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6073 transitions. [2021-06-05 17:00:09,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:00:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6073 transitions. [2021-06-05 17:00:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:00:09,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:09,932 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 17:00:10,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:10,133 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:10,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:10,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1092882871, now seen corresponding path program 66 times [2021-06-05 17:00:10,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:10,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260427812] [2021-06-05 17:00:10,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:10,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:10,406 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 17:00:10,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:10,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260427812] [2021-06-05 17:00:10,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260427812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:10,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349324925] [2021-06-05 17:00:10,407 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 17:00:10,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:10,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:10,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:00:10,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:10,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:10,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:10,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:00:10,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:00:10,587 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 21 treesize of output 11 [2021-06-05 17:00:10,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:10,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:10,592 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 17:00:10,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:00:10,606 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 17:00:10,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349324925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:10,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:10,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 17:00:10,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953544155] [2021-06-05 17:00:10,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:00:10,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:10,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:00:10,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:00:10,607 INFO L87 Difference]: Start difference. First operand 1783 states and 6073 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 17:00:11,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:11,706 INFO L93 Difference]: Finished difference Result 2367 states and 7833 transitions. [2021-06-05 17:00:11,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:00:11,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 26 [2021-06-05 17:00:11,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:11,710 INFO L225 Difference]: With dead ends: 2367 [2021-06-05 17:00:11,710 INFO L226 Difference]: Without dead ends: 2345 [2021-06-05 17:00:11,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1029.7ms TimeCoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:00:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-06-05 17:00:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1774. [2021-06-05 17:00:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.412859560067682) internal successors, (6051), 1773 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 6051 transitions. [2021-06-05 17:00:11,738 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 6051 transitions. Word has length 26 [2021-06-05 17:00:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:11,738 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 6051 transitions. [2021-06-05 17:00:11,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 17:00:11,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 6051 transitions. [2021-06-05 17:00:11,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:00:11,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:11,741 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 17:00:11,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:11,963 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:11,963 INFO L82 PathProgramCache]: Analyzing trace with hash -167389005, now seen corresponding path program 67 times [2021-06-05 17:00:11,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:11,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316906768] [2021-06-05 17:00:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:12,154 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 17:00:12,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316906768] [2021-06-05 17:00:12,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316906768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681478909] [2021-06-05 17:00:12,155 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 17:00:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:12,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:00:12,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:12,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:00:12,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:12,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:00:12,297 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 21 treesize of output 11 [2021-06-05 17:00:12,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:00:12,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:12,302 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 17:00:12,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:00:12,320 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 17:00:12,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681478909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:12,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:12,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:00:12,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166302166] [2021-06-05 17:00:12,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:00:12,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:12,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:00:12,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:00:12,321 INFO L87 Difference]: Start difference. First operand 1774 states and 6051 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 17:00:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:13,165 INFO L93 Difference]: Finished difference Result 2445 states and 8079 transitions. [2021-06-05 17:00:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:00:13,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 26 [2021-06-05 17:00:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:13,169 INFO L225 Difference]: With dead ends: 2445 [2021-06-05 17:00:13,169 INFO L226 Difference]: Without dead ends: 2426 [2021-06-05 17:00:13,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 768.2ms TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:00:13,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-05 17:00:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1768. [2021-06-05 17:00:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.411431805319751) internal successors, (6028), 1767 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 6028 transitions. [2021-06-05 17:00:13,197 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 6028 transitions. Word has length 26 [2021-06-05 17:00:13,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:13,198 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 6028 transitions. [2021-06-05 17:00:13,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 17:00:13,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 6028 transitions. [2021-06-05 17:00:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:00:13,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:13,200 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 17:00:13,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable361 [2021-06-05 17:00:13,417 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:13,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:13,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1466803217, now seen corresponding path program 68 times [2021-06-05 17:00:13,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:13,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964856992] [2021-06-05 17:00:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:13,550 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 17:00:13,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:13,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964856992] [2021-06-05 17:00:13,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964856992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:13,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595677125] [2021-06-05 17:00:13,550 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 17:00:13,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:13,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:13,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:00:13,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:13,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:13,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:13,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:13,724 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 21 treesize of output 39 [2021-06-05 17:00:13,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:00:13,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:13,737 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 17:00:13,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:00:13,774 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 17:00:13,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595677125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:13,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:13,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:00:13,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769523127] [2021-06-05 17:00:13,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:00:13,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:13,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:00:13,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:00:13,775 INFO L87 Difference]: Start difference. First operand 1768 states and 6028 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 17:00:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:14,828 INFO L93 Difference]: Finished difference Result 2420 states and 8056 transitions. [2021-06-05 17:00:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:00:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 17:00:14,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:14,832 INFO L225 Difference]: With dead ends: 2420 [2021-06-05 17:00:14,832 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 17:00:14,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 672.6ms TimeCoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:00:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 17:00:14,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1770. [2021-06-05 17:00:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.4132278123233464) internal successors, (6038), 1769 states have internal predecessors, (6038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 6038 transitions. [2021-06-05 17:00:14,858 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 6038 transitions. Word has length 26 [2021-06-05 17:00:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:14,858 INFO L482 AbstractCegarLoop]: Abstraction has 1770 states and 6038 transitions. [2021-06-05 17:00:14,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 17:00:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 6038 transitions. [2021-06-05 17:00:14,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:00:14,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:14,861 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 17:00:15,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:15,077 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:15,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1755833907, now seen corresponding path program 69 times [2021-06-05 17:00:15,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:15,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854877317] [2021-06-05 17:00:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:15,213 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 17:00:15,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:15,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854877317] [2021-06-05 17:00:15,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854877317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:15,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446058178] [2021-06-05 17:00:15,214 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 17:00:15,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:00:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:15,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:00:15,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:15,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:00:15,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:00:15,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-05 17:00:15,346 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:00:15,361 INFO L628 ElimStorePlain]: treesize reduction 15, result has 54.5 percent of original size [2021-06-05 17:00:15,363 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 17:00:15,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:00:15,410 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 17:00:15,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446058178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:15,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:15,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:00:15,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643794590] [2021-06-05 17:00:15,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:15,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:15,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:15,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:15,412 INFO L87 Difference]: Start difference. First operand 1770 states and 6038 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 17:00:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:16,092 INFO L93 Difference]: Finished difference Result 2553 states and 8437 transitions. [2021-06-05 17:00:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:00:16,092 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 26 [2021-06-05 17:00:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:16,095 INFO L225 Difference]: With dead ends: 2553 [2021-06-05 17:00:16,095 INFO L226 Difference]: Without dead ends: 2523 [2021-06-05 17:00:16,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:00:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2021-06-05 17:00:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 1776. [2021-06-05 17:00:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 3.411830985915493) internal successors, (6056), 1775 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:16,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 6056 transitions. [2021-06-05 17:00:16,117 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 6056 transitions. Word has length 26 [2021-06-05 17:00:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:16,117 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 6056 transitions. [2021-06-05 17:00:16,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 17:00:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 6056 transitions. [2021-06-05 17:00:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:16,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:16,119 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 17:00:16,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:16,320 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:16,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:16,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 52 times [2021-06-05 17:00:16,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:16,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726031961] [2021-06-05 17:00:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:16,363 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 17:00:16,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:16,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726031961] [2021-06-05 17:00:16,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726031961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:16,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636115593] [2021-06-05 17:00:16,363 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 17:00:16,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:16,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:16,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:16,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:16,495 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 17:00:16,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636115593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:16,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:16,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:00:16,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091556487] [2021-06-05 17:00:16,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:16,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:16,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:16,496 INFO L87 Difference]: Start difference. First operand 1776 states and 6056 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 17:00:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:17,447 INFO L93 Difference]: Finished difference Result 4749 states and 14648 transitions. [2021-06-05 17:00:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:00:17,447 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 17:00:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:17,453 INFO L225 Difference]: With dead ends: 4749 [2021-06-05 17:00:17,454 INFO L226 Difference]: Without dead ends: 4749 [2021-06-05 17:00:17,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 570.6ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:00:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2021-06-05 17:00:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 1969. [2021-06-05 17:00:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.4690040650406506) internal successors, (6827), 1968 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6827 transitions. [2021-06-05 17:00:17,492 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6827 transitions. Word has length 28 [2021-06-05 17:00:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:17,492 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6827 transitions. [2021-06-05 17:00:17,492 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 17:00:17,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6827 transitions. [2021-06-05 17:00:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:17,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:17,494 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 17:00:17,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:17,694 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:17,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:17,695 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 53 times [2021-06-05 17:00:17,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:17,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730685640] [2021-06-05 17:00:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:17,734 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 17:00:17,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:17,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730685640] [2021-06-05 17:00:17,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730685640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:17,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687318202] [2021-06-05 17:00:17,735 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 17:00:17,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:00:17,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:17,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:17,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:17,875 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 17:00:17,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687318202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:17,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:17,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:00:17,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503107302] [2021-06-05 17:00:17,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:00:17,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:17,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:00:17,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:00:17,876 INFO L87 Difference]: Start difference. First operand 1969 states and 6827 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 17:00:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:19,063 INFO L93 Difference]: Finished difference Result 6328 states and 19229 transitions. [2021-06-05 17:00:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:00:19,063 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 17:00:19,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:19,071 INFO L225 Difference]: With dead ends: 6328 [2021-06-05 17:00:19,071 INFO L226 Difference]: Without dead ends: 6328 [2021-06-05 17:00:19,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 717.6ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 17:00:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6328 states. [2021-06-05 17:00:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6328 to 1980. [2021-06-05 17:00:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.477008590197069) internal successors, (6881), 1979 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6881 transitions. [2021-06-05 17:00:19,118 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6881 transitions. Word has length 28 [2021-06-05 17:00:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:19,118 INFO L482 AbstractCegarLoop]: Abstraction has 1980 states and 6881 transitions. [2021-06-05 17:00:19,118 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 17:00:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6881 transitions. [2021-06-05 17:00:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:19,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:19,120 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 17:00:19,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:19,320 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:19,321 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 54 times [2021-06-05 17:00:19,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:19,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632463371] [2021-06-05 17:00:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:19,378 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 17:00:19,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:19,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632463371] [2021-06-05 17:00:19,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632463371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:19,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390064772] [2021-06-05 17:00:19,378 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 17:00:19,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:00:19,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:19,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:19,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:19,513 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 17:00:19,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390064772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:19,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:19,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:00:19,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092349040] [2021-06-05 17:00:19,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:00:19,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:00:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:00:19,514 INFO L87 Difference]: Start difference. First operand 1980 states and 6881 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 17:00:20,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:20,725 INFO L93 Difference]: Finished difference Result 5721 states and 17761 transitions. [2021-06-05 17:00:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 17:00:20,725 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 17:00:20,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:20,733 INFO L225 Difference]: With dead ends: 5721 [2021-06-05 17:00:20,733 INFO L226 Difference]: Without dead ends: 5721 [2021-06-05 17:00:20,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 719.7ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 17:00:20,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-06-05 17:00:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 1928. [2021-06-05 17:00:20,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.4504411001556825) internal successors, (6649), 1927 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6649 transitions. [2021-06-05 17:00:20,775 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6649 transitions. Word has length 28 [2021-06-05 17:00:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:20,775 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6649 transitions. [2021-06-05 17:00:20,775 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 17:00:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6649 transitions. [2021-06-05 17:00:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:20,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:20,777 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 17:00:20,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 17:00:20,978 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:20,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:20,978 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 55 times [2021-06-05 17:00:20,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:20,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289195160] [2021-06-05 17:00:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:21,022 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 17:00:21,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:21,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289195160] [2021-06-05 17:00:21,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289195160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:21,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708980033] [2021-06-05 17:00:21,022 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 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 17:00:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:21,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:21,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:21,139 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 17:00:21,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708980033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:21,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:21,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:00:21,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292164797] [2021-06-05 17:00:21,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:21,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:21,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:21,140 INFO L87 Difference]: Start difference. First operand 1928 states and 6649 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 17:00:22,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:22,201 INFO L93 Difference]: Finished difference Result 4835 states and 14815 transitions. [2021-06-05 17:00:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:00:22,202 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 17:00:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:22,207 INFO L225 Difference]: With dead ends: 4835 [2021-06-05 17:00:22,207 INFO L226 Difference]: Without dead ends: 4835 [2021-06-05 17:00:22,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:00:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2021-06-05 17:00:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 1938. [2021-06-05 17:00:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 3.4460505937016004) internal successors, (6675), 1937 states have internal predecessors, (6675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 6675 transitions. [2021-06-05 17:00:22,242 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 6675 transitions. Word has length 28 [2021-06-05 17:00:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:22,242 INFO L482 AbstractCegarLoop]: Abstraction has 1938 states and 6675 transitions. [2021-06-05 17:00:22,242 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 17:00:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 6675 transitions. [2021-06-05 17:00:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:22,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:22,244 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 17:00:22,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 17:00:22,446 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:22,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:22,446 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 70 times [2021-06-05 17:00:22,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:22,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406774431] [2021-06-05 17:00:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:22,486 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 17:00:22,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:22,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406774431] [2021-06-05 17:00:22,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406774431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:22,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912480212] [2021-06-05 17:00:22,486 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 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 17:00:22,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:22,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:22,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:22,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:22,594 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 17:00:22,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912480212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:22,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:22,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:00:22,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915426564] [2021-06-05 17:00:22,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:22,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:22,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:22,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:22,595 INFO L87 Difference]: Start difference. First operand 1938 states and 6675 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 17:00:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:23,183 INFO L93 Difference]: Finished difference Result 4254 states and 13212 transitions. [2021-06-05 17:00:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:00:23,183 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 17:00:23,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:23,190 INFO L225 Difference]: With dead ends: 4254 [2021-06-05 17:00:23,190 INFO L226 Difference]: Without dead ends: 4254 [2021-06-05 17:00:23,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:00:23,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2021-06-05 17:00:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 1994. [2021-06-05 17:00:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.431008529854491) internal successors, (6838), 1993 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6838 transitions. [2021-06-05 17:00:23,238 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6838 transitions. Word has length 28 [2021-06-05 17:00:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:23,238 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6838 transitions. [2021-06-05 17:00:23,238 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 17:00:23,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6838 transitions. [2021-06-05 17:00:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:23,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:23,242 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 17:00:23,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 17:00:23,459 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:23,460 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 56 times [2021-06-05 17:00:23,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:23,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493648584] [2021-06-05 17:00:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:23,487 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 17:00:23,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:23,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493648584] [2021-06-05 17:00:23,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493648584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:23,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821345301] [2021-06-05 17:00:23,487 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 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 17:00:23,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:23,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:23,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:00:23,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:23,571 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 17:00:23,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821345301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:23,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:23,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:00:23,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064052905] [2021-06-05 17:00:23,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:00:23,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:23,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:00:23,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:00:23,573 INFO L87 Difference]: Start difference. First operand 1994 states and 6838 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 17:00:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:23,733 INFO L93 Difference]: Finished difference Result 3480 states and 11300 transitions. [2021-06-05 17:00:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:00:23,733 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 17:00:23,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:23,754 INFO L225 Difference]: With dead ends: 3480 [2021-06-05 17:00:23,754 INFO L226 Difference]: Without dead ends: 3462 [2021-06-05 17:00:23,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:00:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2021-06-05 17:00:23,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 2379. [2021-06-05 17:00:23,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 3.5025231286795626) internal successors, (8329), 2378 states have internal predecessors, (8329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 8329 transitions. [2021-06-05 17:00:23,784 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 8329 transitions. Word has length 28 [2021-06-05 17:00:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:23,785 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 8329 transitions. [2021-06-05 17:00:23,785 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 17:00:23,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 8329 transitions. [2021-06-05 17:00:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:23,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:23,788 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 17:00:23,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:23,988 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:23,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:23,988 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 57 times [2021-06-05 17:00:23,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:23,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073487171] [2021-06-05 17:00:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:24,023 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 17:00:24,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:24,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073487171] [2021-06-05 17:00:24,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073487171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:24,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644373715] [2021-06-05 17:00:24,023 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 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 17:00:24,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:00:24,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:24,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:24,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:24,141 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 17:00:24,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644373715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:24,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:24,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:00:24,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791727229] [2021-06-05 17:00:24,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:24,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:24,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:24,142 INFO L87 Difference]: Start difference. First operand 2379 states and 8329 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 17:00:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:24,711 INFO L93 Difference]: Finished difference Result 4139 states and 13172 transitions. [2021-06-05 17:00:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:00:24,711 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 17:00:24,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:24,717 INFO L225 Difference]: With dead ends: 4139 [2021-06-05 17:00:24,717 INFO L226 Difference]: Without dead ends: 4092 [2021-06-05 17:00:24,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:00:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2021-06-05 17:00:24,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 2547. [2021-06-05 17:00:24,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 3.52356637863315) internal successors, (8971), 2546 states have internal predecessors, (8971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:24,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 8971 transitions. [2021-06-05 17:00:24,759 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 8971 transitions. Word has length 28 [2021-06-05 17:00:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:24,759 INFO L482 AbstractCegarLoop]: Abstraction has 2547 states and 8971 transitions. [2021-06-05 17:00:24,759 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 17:00:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 8971 transitions. [2021-06-05 17:00:24,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:24,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:24,762 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 17:00:24,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 17:00:24,963 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:24,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:24,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1371854597, now seen corresponding path program 71 times [2021-06-05 17:00:24,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:24,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642041839] [2021-06-05 17:00:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:25,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:25,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642041839] [2021-06-05 17:00:25,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642041839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:25,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33611005] [2021-06-05 17:00:25,050 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 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 17:00:25,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:00:25,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:25,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:00:25,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33611005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:25,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:25,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 17:00:25,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136118268] [2021-06-05 17:00:25,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:00:25,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:00:25,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:00:25,185 INFO L87 Difference]: Start difference. First operand 2547 states and 8971 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 17:00:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:25,612 INFO L93 Difference]: Finished difference Result 4980 states and 16523 transitions. [2021-06-05 17:00:25,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:00:25,612 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 17:00:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:25,619 INFO L225 Difference]: With dead ends: 4980 [2021-06-05 17:00:25,619 INFO L226 Difference]: Without dead ends: 4893 [2021-06-05 17:00:25,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:00:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4893 states. [2021-06-05 17:00:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4893 to 3198. [2021-06-05 17:00:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 3197 states have (on average 3.5376915858617455) internal successors, (11310), 3197 states have internal predecessors, (11310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 11310 transitions. [2021-06-05 17:00:25,679 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 11310 transitions. Word has length 28 [2021-06-05 17:00:25,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:25,679 INFO L482 AbstractCegarLoop]: Abstraction has 3198 states and 11310 transitions. [2021-06-05 17:00:25,679 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 17:00:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 11310 transitions. [2021-06-05 17:00:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:25,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:25,684 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 17:00:25,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-06-05 17:00:25,901 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:25,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 58 times [2021-06-05 17:00:25,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:25,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612541604] [2021-06-05 17:00:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:25,934 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 17:00:25,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:25,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612541604] [2021-06-05 17:00:25,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612541604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:25,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702808313] [2021-06-05 17:00:25,935 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 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 17:00:25,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:25,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:25,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:26,045 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 17:00:26,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702808313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:26,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:26,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:00:26,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349043959] [2021-06-05 17:00:26,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:26,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:26,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:26,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:26,046 INFO L87 Difference]: Start difference. First operand 3198 states and 11310 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 17:00:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:26,697 INFO L93 Difference]: Finished difference Result 5423 states and 17174 transitions. [2021-06-05 17:00:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:00:26,697 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 17:00:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:26,705 INFO L225 Difference]: With dead ends: 5423 [2021-06-05 17:00:26,705 INFO L226 Difference]: Without dead ends: 5397 [2021-06-05 17:00:26,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 423.4ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:00:26,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-06-05 17:00:26,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 3216. [2021-06-05 17:00:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 3.5430793157076206) internal successors, (11391), 3215 states have internal predecessors, (11391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 11391 transitions. [2021-06-05 17:00:26,766 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 11391 transitions. Word has length 28 [2021-06-05 17:00:26,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:26,766 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 11391 transitions. [2021-06-05 17:00:26,766 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 17:00:26,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 11391 transitions. [2021-06-05 17:00:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:26,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:26,770 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 17:00:26,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:26,979 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:26,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:26,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 59 times [2021-06-05 17:00:26,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:26,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755472029] [2021-06-05 17:00:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:27,064 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 17:00:27,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:27,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755472029] [2021-06-05 17:00:27,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755472029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:27,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105598283] [2021-06-05 17:00:27,064 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 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 17:00:27,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:00:27,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:27,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:27,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:27,174 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 17:00:27,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105598283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:27,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:27,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:00:27,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009834705] [2021-06-05 17:00:27,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:27,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:27,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:27,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:27,175 INFO L87 Difference]: Start difference. First operand 3216 states and 11391 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 17:00:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:27,901 INFO L93 Difference]: Finished difference Result 5478 states and 17366 transitions. [2021-06-05 17:00:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:00:27,901 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 17:00:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:27,908 INFO L225 Difference]: With dead ends: 5478 [2021-06-05 17:00:27,908 INFO L226 Difference]: Without dead ends: 5447 [2021-06-05 17:00:27,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 458.7ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:00:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5447 states. [2021-06-05 17:00:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5447 to 3206. [2021-06-05 17:00:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 3205 states have (on average 3.550390015600624) internal successors, (11379), 3205 states have internal predecessors, (11379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 11379 transitions. [2021-06-05 17:00:27,967 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 11379 transitions. Word has length 28 [2021-06-05 17:00:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:27,967 INFO L482 AbstractCegarLoop]: Abstraction has 3206 states and 11379 transitions. [2021-06-05 17:00:27,967 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 17:00:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 11379 transitions. [2021-06-05 17:00:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:27,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:27,971 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, 1, 1] [2021-06-05 17:00:28,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:28,172 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:28,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:28,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 60 times [2021-06-05 17:00:28,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:28,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574743478] [2021-06-05 17:00:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:28,205 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 17:00:28,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:28,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574743478] [2021-06-05 17:00:28,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574743478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:28,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475727444] [2021-06-05 17:00:28,206 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 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 17:00:28,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:28,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:28,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:28,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:28,305 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 17:00:28,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475727444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:28,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:28,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:00:28,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543539474] [2021-06-05 17:00:28,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:28,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:28,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:28,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:28,305 INFO L87 Difference]: Start difference. First operand 3206 states and 11379 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 17:00:28,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:28,850 INFO L93 Difference]: Finished difference Result 6636 states and 21425 transitions. [2021-06-05 17:00:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:00:28,850 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 17:00:28,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:28,859 INFO L225 Difference]: With dead ends: 6636 [2021-06-05 17:00:28,859 INFO L226 Difference]: Without dead ends: 6589 [2021-06-05 17:00:28,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 318.7ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:00:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6589 states. [2021-06-05 17:00:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6589 to 3369. [2021-06-05 17:00:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.5973871733966747) internal successors, (12116), 3368 states have internal predecessors, (12116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 12116 transitions. [2021-06-05 17:00:28,929 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 12116 transitions. Word has length 28 [2021-06-05 17:00:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:28,929 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 12116 transitions. [2021-06-05 17:00:28,930 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 17:00:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 12116 transitions. [2021-06-05 17:00:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:28,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:28,934 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 17:00:29,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:29,134 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:29,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:29,134 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 61 times [2021-06-05 17:00:29,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:29,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025946349] [2021-06-05 17:00:29,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:29,159 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 17:00:29,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:29,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025946349] [2021-06-05 17:00:29,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025946349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:29,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172422728] [2021-06-05 17:00:29,159 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 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 17:00:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:29,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:00:29,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:29,242 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 17:00:29,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172422728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:29,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:29,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 17:00:29,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981104524] [2021-06-05 17:00:29,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:00:29,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:29,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:00:29,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:00:29,242 INFO L87 Difference]: Start difference. First operand 3369 states and 12116 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 17:00:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:29,404 INFO L93 Difference]: Finished difference Result 5034 states and 16661 transitions. [2021-06-05 17:00:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:00:29,405 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 17:00:29,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:29,411 INFO L225 Difference]: With dead ends: 5034 [2021-06-05 17:00:29,412 INFO L226 Difference]: Without dead ends: 5034 [2021-06-05 17:00:29,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:00:29,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2021-06-05 17:00:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 3201. [2021-06-05 17:00:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 3.556875) internal successors, (11382), 3200 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 11382 transitions. [2021-06-05 17:00:29,463 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 11382 transitions. Word has length 28 [2021-06-05 17:00:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:29,463 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 11382 transitions. [2021-06-05 17:00:29,463 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 17:00:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 11382 transitions. [2021-06-05 17:00:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:29,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:29,467 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 17:00:29,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-06-05 17:00:29,668 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:29,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 62 times [2021-06-05 17:00:29,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:29,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927211938] [2021-06-05 17:00:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:29,707 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 17:00:29,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:29,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927211938] [2021-06-05 17:00:29,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927211938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:29,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340781555] [2021-06-05 17:00:29,708 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 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 17:00:29,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:29,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:29,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:29,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:29,834 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 17:00:29,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340781555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:29,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:29,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:00:29,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155271855] [2021-06-05 17:00:29,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:29,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:29,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:29,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:29,835 INFO L87 Difference]: Start difference. First operand 3201 states and 11382 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 17:00:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:30,481 INFO L93 Difference]: Finished difference Result 7123 states and 22742 transitions. [2021-06-05 17:00:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:00:30,482 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 17:00:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:30,492 INFO L225 Difference]: With dead ends: 7123 [2021-06-05 17:00:30,492 INFO L226 Difference]: Without dead ends: 7123 [2021-06-05 17:00:30,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:00:30,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7123 states. [2021-06-05 17:00:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7123 to 3231. [2021-06-05 17:00:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 3230 states have (on average 3.556346749226006) internal successors, (11487), 3230 states have internal predecessors, (11487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 11487 transitions. [2021-06-05 17:00:30,567 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 11487 transitions. Word has length 28 [2021-06-05 17:00:30,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:30,567 INFO L482 AbstractCegarLoop]: Abstraction has 3231 states and 11487 transitions. [2021-06-05 17:00:30,567 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 17:00:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 11487 transitions. [2021-06-05 17:00:30,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:30,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:30,572 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 17:00:30,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 17:00:30,772 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:30,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:30,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 63 times [2021-06-05 17:00:30,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:30,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160816956] [2021-06-05 17:00:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:30,816 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 17:00:30,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160816956] [2021-06-05 17:00:30,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160816956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323900222] [2021-06-05 17:00:30,817 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 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 17:00:30,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:00:30,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:30,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:30,944 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 17:00:30,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323900222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:30,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:30,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:00:30,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238519135] [2021-06-05 17:00:30,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:30,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:30,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:30,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:30,945 INFO L87 Difference]: Start difference. First operand 3231 states and 11487 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 17:00:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:31,730 INFO L93 Difference]: Finished difference Result 7417 states and 23715 transitions. [2021-06-05 17:00:31,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 17:00:31,730 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 17:00:31,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:31,739 INFO L225 Difference]: With dead ends: 7417 [2021-06-05 17:00:31,739 INFO L226 Difference]: Without dead ends: 7417 [2021-06-05 17:00:31,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:00:31,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7417 states. [2021-06-05 17:00:31,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7417 to 3361. [2021-06-05 17:00:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 3.5398809523809525) internal successors, (11894), 3360 states have internal predecessors, (11894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 11894 transitions. [2021-06-05 17:00:31,809 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 11894 transitions. Word has length 28 [2021-06-05 17:00:31,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:31,809 INFO L482 AbstractCegarLoop]: Abstraction has 3361 states and 11894 transitions. [2021-06-05 17:00:31,809 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 17:00:31,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 11894 transitions. [2021-06-05 17:00:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:31,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:31,813 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 17:00:32,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 17:00:32,014 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:32,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 64 times [2021-06-05 17:00:32,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:32,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674989130] [2021-06-05 17:00:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:32,049 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 17:00:32,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:32,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674989130] [2021-06-05 17:00:32,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674989130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:32,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637004343] [2021-06-05 17:00:32,049 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 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 17:00:32,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:32,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:32,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:32,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:32,137 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 17:00:32,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637004343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:32,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:32,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:00:32,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565839067] [2021-06-05 17:00:32,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:32,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:32,138 INFO L87 Difference]: Start difference. First operand 3361 states and 11894 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 17:00:32,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:32,713 INFO L93 Difference]: Finished difference Result 7892 states and 25256 transitions. [2021-06-05 17:00:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:00:32,713 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 17:00:32,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:32,726 INFO L225 Difference]: With dead ends: 7892 [2021-06-05 17:00:32,726 INFO L226 Difference]: Without dead ends: 7879 [2021-06-05 17:00:32,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 346.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:00:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2021-06-05 17:00:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 4006. [2021-06-05 17:00:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4006 states, 4005 states have (on average 3.5845193508114854) internal successors, (14356), 4005 states have internal predecessors, (14356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4006 states to 4006 states and 14356 transitions. [2021-06-05 17:00:32,859 INFO L78 Accepts]: Start accepts. Automaton has 4006 states and 14356 transitions. Word has length 28 [2021-06-05 17:00:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:32,859 INFO L482 AbstractCegarLoop]: Abstraction has 4006 states and 14356 transitions. [2021-06-05 17:00:32,859 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 17:00:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4006 states and 14356 transitions. [2021-06-05 17:00:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:32,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:32,864 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 17:00:33,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 17:00:33,064 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:33,065 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 65 times [2021-06-05 17:00:33,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:33,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122670751] [2021-06-05 17:00:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:33,096 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 17:00:33,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:33,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122670751] [2021-06-05 17:00:33,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122670751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:33,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462873365] [2021-06-05 17:00:33,096 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 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 17:00:33,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:00:33,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:33,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:33,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:33,190 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 17:00:33,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462873365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:33,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:33,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:00:33,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824766370] [2021-06-05 17:00:33,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:33,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:33,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:33,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:33,191 INFO L87 Difference]: Start difference. First operand 4006 states and 14356 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 17:00:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:33,765 INFO L93 Difference]: Finished difference Result 8151 states and 25974 transitions. [2021-06-05 17:00:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:00:33,766 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 17:00:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:33,777 INFO L225 Difference]: With dead ends: 8151 [2021-06-05 17:00:33,777 INFO L226 Difference]: Without dead ends: 8151 [2021-06-05 17:00:33,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:00:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-05 17:00:33,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 3759. [2021-06-05 17:00:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 3.5494944119212346) internal successors, (13339), 3758 states have internal predecessors, (13339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 13339 transitions. [2021-06-05 17:00:33,861 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 13339 transitions. Word has length 28 [2021-06-05 17:00:33,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:33,861 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 13339 transitions. [2021-06-05 17:00:33,861 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 17:00:33,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 13339 transitions. [2021-06-05 17:00:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:33,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:33,866 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 17:00:34,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 17:00:34,066 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:34,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 66 times [2021-06-05 17:00:34,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:34,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570942554] [2021-06-05 17:00:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:34,103 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 17:00:34,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:34,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570942554] [2021-06-05 17:00:34,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570942554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:34,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968551132] [2021-06-05 17:00:34,104 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 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 17:00:34,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:00:34,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:34,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:34,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:34,193 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 17:00:34,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968551132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:34,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:34,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:00:34,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795393587] [2021-06-05 17:00:34,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:34,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:34,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:34,194 INFO L87 Difference]: Start difference. First operand 3759 states and 13339 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 17:00:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:34,907 INFO L93 Difference]: Finished difference Result 7259 states and 23813 transitions. [2021-06-05 17:00:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:00:34,908 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 17:00:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:34,919 INFO L225 Difference]: With dead ends: 7259 [2021-06-05 17:00:34,919 INFO L226 Difference]: Without dead ends: 7255 [2021-06-05 17:00:34,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 403.2ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:00:34,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7255 states. [2021-06-05 17:00:34,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7255 to 3392. [2021-06-05 17:00:34,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 3.5956944854025363) internal successors, (12193), 3391 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 12193 transitions. [2021-06-05 17:00:34,995 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 12193 transitions. Word has length 28 [2021-06-05 17:00:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:34,995 INFO L482 AbstractCegarLoop]: Abstraction has 3392 states and 12193 transitions. [2021-06-05 17:00:34,995 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 17:00:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 12193 transitions. [2021-06-05 17:00:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:34,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:34,999 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 17:00:35,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-06-05 17:00:35,200 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:35,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 67 times [2021-06-05 17:00:35,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:35,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559105565] [2021-06-05 17:00:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:35,268 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 17:00:35,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:35,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559105565] [2021-06-05 17:00:35,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559105565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:35,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043740360] [2021-06-05 17:00:35,268 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 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 17:00:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:35,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:35,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:35,382 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 17:00:35,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043740360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:35,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:35,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:00:35,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362456085] [2021-06-05 17:00:35,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:35,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:35,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:35,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:35,383 INFO L87 Difference]: Start difference. First operand 3392 states and 12193 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 17:00:36,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:36,382 INFO L93 Difference]: Finished difference Result 11542 states and 38132 transitions. [2021-06-05 17:00:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:00:36,383 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 17:00:36,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:36,403 INFO L225 Difference]: With dead ends: 11542 [2021-06-05 17:00:36,403 INFO L226 Difference]: Without dead ends: 11542 [2021-06-05 17:00:36,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 617.2ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:00:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11542 states. [2021-06-05 17:00:36,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11542 to 3680. [2021-06-05 17:00:36,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3680 states, 3679 states have (on average 3.678173416689318) internal successors, (13532), 3679 states have internal predecessors, (13532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3680 states to 3680 states and 13532 transitions. [2021-06-05 17:00:36,520 INFO L78 Accepts]: Start accepts. Automaton has 3680 states and 13532 transitions. Word has length 28 [2021-06-05 17:00:36,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:36,520 INFO L482 AbstractCegarLoop]: Abstraction has 3680 states and 13532 transitions. [2021-06-05 17:00:36,520 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 17:00:36,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states and 13532 transitions. [2021-06-05 17:00:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:36,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:36,525 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 17:00:36,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:36,725 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:36,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:36,726 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 68 times [2021-06-05 17:00:36,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:36,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179513762] [2021-06-05 17:00:36,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:36,761 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 17:00:36,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:36,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179513762] [2021-06-05 17:00:36,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179513762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:36,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939296484] [2021-06-05 17:00:36,762 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 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 17:00:36,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:36,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:36,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:36,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:36,880 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 17:00:36,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939296484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:36,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:36,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:00:36,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089282312] [2021-06-05 17:00:36,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:36,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:36,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:36,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:36,881 INFO L87 Difference]: Start difference. First operand 3680 states and 13532 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 17:00:37,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:37,886 INFO L93 Difference]: Finished difference Result 11234 states and 37308 transitions. [2021-06-05 17:00:37,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:00:37,887 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 17:00:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:37,905 INFO L225 Difference]: With dead ends: 11234 [2021-06-05 17:00:37,906 INFO L226 Difference]: Without dead ends: 11234 [2021-06-05 17:00:37,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 605.8ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:00:37,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11234 states. [2021-06-05 17:00:38,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11234 to 3634. [2021-06-05 17:00:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 3.6584090283512247) internal successors, (13291), 3633 states have internal predecessors, (13291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 13291 transitions. [2021-06-05 17:00:38,021 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 13291 transitions. Word has length 28 [2021-06-05 17:00:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:38,021 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 13291 transitions. [2021-06-05 17:00:38,021 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 17:00:38,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 13291 transitions. [2021-06-05 17:00:38,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:38,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:38,026 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 17:00:38,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 17:00:38,226 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:38,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:38,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 69 times [2021-06-05 17:00:38,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:38,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474047930] [2021-06-05 17:00:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:38,262 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 17:00:38,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:38,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474047930] [2021-06-05 17:00:38,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474047930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:38,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657649021] [2021-06-05 17:00:38,263 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 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 17:00:38,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:00:38,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:38,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:38,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:38,371 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 17:00:38,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657649021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:38,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:38,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:00:38,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134501923] [2021-06-05 17:00:38,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:38,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:38,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:38,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:38,372 INFO L87 Difference]: Start difference. First operand 3634 states and 13291 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 17:00:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:39,244 INFO L93 Difference]: Finished difference Result 10540 states and 33835 transitions. [2021-06-05 17:00:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 17:00:39,245 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 17:00:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:39,261 INFO L225 Difference]: With dead ends: 10540 [2021-06-05 17:00:39,261 INFO L226 Difference]: Without dead ends: 10540 [2021-06-05 17:00:39,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 486.6ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:00:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10540 states. [2021-06-05 17:00:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10540 to 3674. [2021-06-05 17:00:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 3.662673563844269) internal successors, (13453), 3673 states have internal predecessors, (13453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 13453 transitions. [2021-06-05 17:00:39,368 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 13453 transitions. Word has length 28 [2021-06-05 17:00:39,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:39,369 INFO L482 AbstractCegarLoop]: Abstraction has 3674 states and 13453 transitions. [2021-06-05 17:00:39,369 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 17:00:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 13453 transitions. [2021-06-05 17:00:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:39,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:39,374 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 17:00:39,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:39,574 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 70 times [2021-06-05 17:00:39,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:39,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590922013] [2021-06-05 17:00:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:39,607 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 17:00:39,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:39,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590922013] [2021-06-05 17:00:39,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590922013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:39,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128658839] [2021-06-05 17:00:39,607 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 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 17:00:39,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:39,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:39,706 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 17:00:39,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128658839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:39,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:39,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:00:39,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840056372] [2021-06-05 17:00:39,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:39,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:39,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:39,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:39,707 INFO L87 Difference]: Start difference. First operand 3674 states and 13453 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 17:00:40,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:40,592 INFO L93 Difference]: Finished difference Result 9924 states and 32320 transitions. [2021-06-05 17:00:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 17:00:40,593 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 17:00:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:40,609 INFO L225 Difference]: With dead ends: 9924 [2021-06-05 17:00:40,609 INFO L226 Difference]: Without dead ends: 9916 [2021-06-05 17:00:40,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 466.9ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:00:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9916 states. [2021-06-05 17:00:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9916 to 3640. [2021-06-05 17:00:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 3.6575982412750756) internal successors, (13310), 3639 states have internal predecessors, (13310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 13310 transitions. [2021-06-05 17:00:40,715 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 13310 transitions. Word has length 28 [2021-06-05 17:00:40,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:40,715 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 13310 transitions. [2021-06-05 17:00:40,715 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 17:00:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 13310 transitions. [2021-06-05 17:00:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:40,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:40,720 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 17:00:40,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:40,937 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 71 times [2021-06-05 17:00:40,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:40,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022817028] [2021-06-05 17:00:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:40,970 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 17:00:40,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:40,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022817028] [2021-06-05 17:00:40,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022817028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:40,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349930685] [2021-06-05 17:00:40,970 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 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 17:00:40,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:00:40,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:40,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:40,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:41,087 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 17:00:41,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349930685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:41,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:41,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:00:41,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656996021] [2021-06-05 17:00:41,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:41,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:41,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:41,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:41,088 INFO L87 Difference]: Start difference. First operand 3640 states and 13310 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 17:00:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:41,994 INFO L93 Difference]: Finished difference Result 9536 states and 31236 transitions. [2021-06-05 17:00:41,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 17:00:41,995 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 17:00:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:42,010 INFO L225 Difference]: With dead ends: 9536 [2021-06-05 17:00:42,010 INFO L226 Difference]: Without dead ends: 9536 [2021-06-05 17:00:42,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 517.3ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:00:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9536 states. [2021-06-05 17:00:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9536 to 3656. [2021-06-05 17:00:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 3.6590971272229824) internal successors, (13374), 3655 states have internal predecessors, (13374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:42,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 13374 transitions. [2021-06-05 17:00:42,114 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 13374 transitions. Word has length 28 [2021-06-05 17:00:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:42,114 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 13374 transitions. [2021-06-05 17:00:42,114 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 17:00:42,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 13374 transitions. [2021-06-05 17:00:42,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:42,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:42,119 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 17:00:42,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:42,319 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:42,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:42,320 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 72 times [2021-06-05 17:00:42,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:42,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883535677] [2021-06-05 17:00:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:42,353 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 17:00:42,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:42,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883535677] [2021-06-05 17:00:42,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883535677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:42,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677032939] [2021-06-05 17:00:42,353 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 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 17:00:42,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 17:00:42,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:42,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:42,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:42,460 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 17:00:42,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677032939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:42,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:42,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:00:42,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153603187] [2021-06-05 17:00:42,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:42,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:42,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:42,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:42,461 INFO L87 Difference]: Start difference. First operand 3656 states and 13374 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 17:00:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:43,388 INFO L93 Difference]: Finished difference Result 9201 states and 30441 transitions. [2021-06-05 17:00:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:00:43,388 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 17:00:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:43,403 INFO L225 Difference]: With dead ends: 9201 [2021-06-05 17:00:43,404 INFO L226 Difference]: Without dead ends: 9193 [2021-06-05 17:00:43,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 493.2ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:00:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9193 states. [2021-06-05 17:00:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9193 to 3324. [2021-06-05 17:00:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 3.570869696057779) internal successors, (11866), 3323 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 11866 transitions. [2021-06-05 17:00:43,494 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 11866 transitions. Word has length 28 [2021-06-05 17:00:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:43,494 INFO L482 AbstractCegarLoop]: Abstraction has 3324 states and 11866 transitions. [2021-06-05 17:00:43,494 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 17:00:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 11866 transitions. [2021-06-05 17:00:43,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:43,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:43,498 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 17:00:43,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:43,699 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:43,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:43,699 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 73 times [2021-06-05 17:00:43,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:43,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062819583] [2021-06-05 17:00:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:43,733 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 17:00:43,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:43,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062819583] [2021-06-05 17:00:43,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062819583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:43,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468523998] [2021-06-05 17:00:43,733 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 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 17:00:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:43,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:43,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:43,846 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 17:00:43,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468523998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:43,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:43,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:00:43,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311122107] [2021-06-05 17:00:43,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:00:43,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:43,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:00:43,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:00:43,847 INFO L87 Difference]: Start difference. First operand 3324 states and 11866 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 17:00:44,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:44,672 INFO L93 Difference]: Finished difference Result 6988 states and 22842 transitions. [2021-06-05 17:00:44,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:00:44,672 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 17:00:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:44,682 INFO L225 Difference]: With dead ends: 6988 [2021-06-05 17:00:44,683 INFO L226 Difference]: Without dead ends: 6988 [2021-06-05 17:00:44,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:00:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2021-06-05 17:00:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 3336. [2021-06-05 17:00:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 3.569415292353823) internal successors, (11904), 3335 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 11904 transitions. [2021-06-05 17:00:44,760 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 11904 transitions. Word has length 28 [2021-06-05 17:00:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:44,760 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 11904 transitions. [2021-06-05 17:00:44,760 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 17:00:44,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 11904 transitions. [2021-06-05 17:00:44,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:44,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:44,765 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 17:00:44,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 17:00:44,966 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:44,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:44,966 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 74 times [2021-06-05 17:00:44,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:44,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543331999] [2021-06-05 17:00:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:44,999 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 17:00:44,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:44,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543331999] [2021-06-05 17:00:45,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543331999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:45,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391776714] [2021-06-05 17:00:45,000 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 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 17:00:45,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:45,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:45,143 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 17:00:45,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391776714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:45,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:45,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:00:45,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248283740] [2021-06-05 17:00:45,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:45,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:45,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:45,144 INFO L87 Difference]: Start difference. First operand 3336 states and 11904 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 17:00:46,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:46,171 INFO L93 Difference]: Finished difference Result 7916 states and 25231 transitions. [2021-06-05 17:00:46,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:00:46,171 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 17:00:46,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:46,183 INFO L225 Difference]: With dead ends: 7916 [2021-06-05 17:00:46,183 INFO L226 Difference]: Without dead ends: 7916 [2021-06-05 17:00:46,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 685.6ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 17:00:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7916 states. [2021-06-05 17:00:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7916 to 3402. [2021-06-05 17:00:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 3.5639517788885624) internal successors, (12121), 3401 states have internal predecessors, (12121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 12121 transitions. [2021-06-05 17:00:46,259 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 12121 transitions. Word has length 28 [2021-06-05 17:00:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:46,259 INFO L482 AbstractCegarLoop]: Abstraction has 3402 states and 12121 transitions. [2021-06-05 17:00:46,259 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 17:00:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 12121 transitions. [2021-06-05 17:00:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:46,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:46,263 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 17:00:46,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 17:00:46,464 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:46,464 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 75 times [2021-06-05 17:00:46,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:46,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438719415] [2021-06-05 17:00:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:46,499 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 17:00:46,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:46,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438719415] [2021-06-05 17:00:46,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438719415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:46,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246356102] [2021-06-05 17:00:46,499 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 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 17:00:46,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 17:00:46,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:46,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:46,620 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 17:00:46,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246356102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:46,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:46,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:00:46,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43989915] [2021-06-05 17:00:46,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:46,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:46,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:46,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:46,621 INFO L87 Difference]: Start difference. First operand 3402 states and 12121 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 17:00:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:47,590 INFO L93 Difference]: Finished difference Result 7299 states and 23603 transitions. [2021-06-05 17:00:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:00:47,590 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 17:00:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:47,601 INFO L225 Difference]: With dead ends: 7299 [2021-06-05 17:00:47,601 INFO L226 Difference]: Without dead ends: 7295 [2021-06-05 17:00:47,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:00:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7295 states. [2021-06-05 17:00:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7295 to 3337. [2021-06-05 17:00:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3336 states have (on average 3.5617505995203835) internal successors, (11882), 3336 states have internal predecessors, (11882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 11882 transitions. [2021-06-05 17:00:47,672 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 11882 transitions. Word has length 28 [2021-06-05 17:00:47,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:47,672 INFO L482 AbstractCegarLoop]: Abstraction has 3337 states and 11882 transitions. [2021-06-05 17:00:47,672 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 17:00:47,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 11882 transitions. [2021-06-05 17:00:47,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:47,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:47,676 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 17:00:47,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 17:00:47,877 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:47,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:47,877 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 72 times [2021-06-05 17:00:47,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:47,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005161143] [2021-06-05 17:00:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:47,937 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 17:00:47,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:47,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005161143] [2021-06-05 17:00:47,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005161143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:47,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698692501] [2021-06-05 17:00:47,938 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 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 17:00:47,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:00:47,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:47,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:47,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:48,055 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 17:00:48,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698692501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:48,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:48,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:00:48,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363839497] [2021-06-05 17:00:48,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:48,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:48,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:48,056 INFO L87 Difference]: Start difference. First operand 3337 states and 11882 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 17:00:48,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:48,624 INFO L93 Difference]: Finished difference Result 6442 states and 21191 transitions. [2021-06-05 17:00:48,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:00:48,624 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 17:00:48,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:48,633 INFO L225 Difference]: With dead ends: 6442 [2021-06-05 17:00:48,633 INFO L226 Difference]: Without dead ends: 6442 [2021-06-05 17:00:48,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:00:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6442 states. [2021-06-05 17:00:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6442 to 3341. [2021-06-05 17:00:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 3.5634730538922157) internal successors, (11902), 3340 states have internal predecessors, (11902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 11902 transitions. [2021-06-05 17:00:48,711 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 11902 transitions. Word has length 28 [2021-06-05 17:00:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:48,711 INFO L482 AbstractCegarLoop]: Abstraction has 3341 states and 11902 transitions. [2021-06-05 17:00:48,711 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 17:00:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 11902 transitions. [2021-06-05 17:00:48,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:48,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:48,715 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 17:00:48,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 17:00:48,916 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:48,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:48,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 73 times [2021-06-05 17:00:48,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:48,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297213672] [2021-06-05 17:00:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:48,965 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 17:00:48,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:48,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297213672] [2021-06-05 17:00:48,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297213672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:48,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7486240] [2021-06-05 17:00:48,965 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 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 17:00:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:48,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:48,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:49,067 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 17:00:49,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7486240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:49,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:49,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:00:49,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038108787] [2021-06-05 17:00:49,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:49,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:49,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:49,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:49,068 INFO L87 Difference]: Start difference. First operand 3341 states and 11902 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 17:00:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:49,774 INFO L93 Difference]: Finished difference Result 6916 states and 22513 transitions. [2021-06-05 17:00:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:00:49,775 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 17:00:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:49,785 INFO L225 Difference]: With dead ends: 6916 [2021-06-05 17:00:49,785 INFO L226 Difference]: Without dead ends: 6916 [2021-06-05 17:00:49,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 424.7ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:00:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2021-06-05 17:00:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 3355. [2021-06-05 17:00:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 3.5608228980322005) internal successors, (11943), 3354 states have internal predecessors, (11943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 11943 transitions. [2021-06-05 17:00:49,857 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 11943 transitions. Word has length 28 [2021-06-05 17:00:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:49,857 INFO L482 AbstractCegarLoop]: Abstraction has 3355 states and 11943 transitions. [2021-06-05 17:00:49,857 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 17:00:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 11943 transitions. [2021-06-05 17:00:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:49,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:49,861 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 17:00:50,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 17:00:50,062 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:50,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:50,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 74 times [2021-06-05 17:00:50,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:50,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152880928] [2021-06-05 17:00:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:50,114 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 17:00:50,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:50,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152880928] [2021-06-05 17:00:50,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152880928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:50,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10871103] [2021-06-05 17:00:50,115 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 17:00:50,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:50,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:50,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:50,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:50,238 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 17:00:50,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10871103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:50,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:50,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:00:50,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840187632] [2021-06-05 17:00:50,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:50,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:50,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:50,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:50,238 INFO L87 Difference]: Start difference. First operand 3355 states and 11943 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 17:00:51,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:51,085 INFO L93 Difference]: Finished difference Result 7422 states and 23945 transitions. [2021-06-05 17:00:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 17:00:51,086 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 17:00:51,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:51,096 INFO L225 Difference]: With dead ends: 7422 [2021-06-05 17:00:51,097 INFO L226 Difference]: Without dead ends: 7422 [2021-06-05 17:00:51,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 526.1ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:00:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7422 states. [2021-06-05 17:00:51,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7422 to 3435. [2021-06-05 17:00:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.554164239953407) internal successors, (12205), 3434 states have internal predecessors, (12205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 12205 transitions. [2021-06-05 17:00:51,171 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 12205 transitions. Word has length 28 [2021-06-05 17:00:51,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:51,171 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 12205 transitions. [2021-06-05 17:00:51,172 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 17:00:51,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 12205 transitions. [2021-06-05 17:00:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:51,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:51,176 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 17:00:51,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 17:00:51,376 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:51,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 75 times [2021-06-05 17:00:51,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:51,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355473490] [2021-06-05 17:00:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:51,409 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 17:00:51,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:51,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355473490] [2021-06-05 17:00:51,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355473490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:51,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570044094] [2021-06-05 17:00:51,409 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 17:00:51,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:00:51,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:51,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:51,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:51,522 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 17:00:51,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570044094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:51,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:51,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 17:00:51,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566121623] [2021-06-05 17:00:51,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:00:51,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:51,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:00:51,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:00:51,523 INFO L87 Difference]: Start difference. First operand 3435 states and 12205 transitions. Second operand has 16 states, 16 states have (on average 2.9375) 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 17:00:52,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:52,066 INFO L93 Difference]: Finished difference Result 7221 states and 24725 transitions. [2021-06-05 17:00:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:00:52,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) 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 17:00:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:52,077 INFO L225 Difference]: With dead ends: 7221 [2021-06-05 17:00:52,078 INFO L226 Difference]: Without dead ends: 7221 [2021-06-05 17:00:52,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:00:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7221 states. [2021-06-05 17:00:52,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7221 to 4565. [2021-06-05 17:00:52,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 3.672655565293602) internal successors, (16762), 4564 states have internal predecessors, (16762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 16762 transitions. [2021-06-05 17:00:52,166 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 16762 transitions. Word has length 28 [2021-06-05 17:00:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:52,166 INFO L482 AbstractCegarLoop]: Abstraction has 4565 states and 16762 transitions. [2021-06-05 17:00:52,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) 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 17:00:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 16762 transitions. [2021-06-05 17:00:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:52,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:52,173 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 17:00:52,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 17:00:52,373 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:52,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:52,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 76 times [2021-06-05 17:00:52,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:52,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200236200] [2021-06-05 17:00:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:52,411 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 17:00:52,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:52,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200236200] [2021-06-05 17:00:52,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200236200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:52,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935985343] [2021-06-05 17:00:52,412 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 17:00:52,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:52,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:52,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:52,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:52,522 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 17:00:52,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935985343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:52,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:52,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:00:52,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519785977] [2021-06-05 17:00:52,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:52,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:52,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:52,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:52,523 INFO L87 Difference]: Start difference. First operand 4565 states and 16762 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 17:00:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:53,275 INFO L93 Difference]: Finished difference Result 8350 states and 28540 transitions. [2021-06-05 17:00:53,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:00:53,276 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 17:00:53,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:53,290 INFO L225 Difference]: With dead ends: 8350 [2021-06-05 17:00:53,290 INFO L226 Difference]: Without dead ends: 8346 [2021-06-05 17:00:53,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 463.3ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:00:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2021-06-05 17:00:53,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 4457. [2021-06-05 17:00:53,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 4456 states have (on average 3.683572710951526) internal successors, (16414), 4456 states have internal predecessors, (16414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 16414 transitions. [2021-06-05 17:00:53,386 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 16414 transitions. Word has length 28 [2021-06-05 17:00:53,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:53,386 INFO L482 AbstractCegarLoop]: Abstraction has 4457 states and 16414 transitions. [2021-06-05 17:00:53,386 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 17:00:53,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 16414 transitions. [2021-06-05 17:00:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:53,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:53,392 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 17:00:53,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 17:00:53,593 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:53,593 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 76 times [2021-06-05 17:00:53,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:53,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647562003] [2021-06-05 17:00:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:53,622 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 17:00:53,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:53,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647562003] [2021-06-05 17:00:53,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647562003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:53,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299108177] [2021-06-05 17:00:53,623 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 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 17:00:53,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:00:53,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:53,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:53,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:53,726 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 17:00:53,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299108177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:53,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:53,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:00:53,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671954581] [2021-06-05 17:00:53,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:53,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:53,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:53,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:53,727 INFO L87 Difference]: Start difference. First operand 4457 states and 16414 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 17:00:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:54,551 INFO L93 Difference]: Finished difference Result 9491 states and 32102 transitions. [2021-06-05 17:00:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:00:54,551 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 17:00:54,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:54,565 INFO L225 Difference]: With dead ends: 9491 [2021-06-05 17:00:54,565 INFO L226 Difference]: Without dead ends: 9479 [2021-06-05 17:00:54,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 455.3ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:00:54,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9479 states. [2021-06-05 17:00:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9479 to 4937. [2021-06-05 17:00:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 3.7670178282009723) internal successors, (18594), 4936 states have internal predecessors, (18594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 18594 transitions. [2021-06-05 17:00:54,666 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 18594 transitions. Word has length 28 [2021-06-05 17:00:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:54,667 INFO L482 AbstractCegarLoop]: Abstraction has 4937 states and 18594 transitions. [2021-06-05 17:00:54,667 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 17:00:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 18594 transitions. [2021-06-05 17:00:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:54,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:54,673 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 17:00:54,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:54,873 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:54,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:54,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 77 times [2021-06-05 17:00:54,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:54,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157723732] [2021-06-05 17:00:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:54,905 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 17:00:54,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:54,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157723732] [2021-06-05 17:00:54,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157723732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:54,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747223013] [2021-06-05 17:00:54,905 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 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 17:00:54,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:00:54,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:54,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:54,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:55,018 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 17:00:55,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747223013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:55,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:55,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:00:55,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507946945] [2021-06-05 17:00:55,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:00:55,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:55,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:00:55,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:00:55,019 INFO L87 Difference]: Start difference. First operand 4937 states and 18594 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 17:00:55,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:55,841 INFO L93 Difference]: Finished difference Result 9821 states and 33130 transitions. [2021-06-05 17:00:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:00:55,841 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 17:00:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:55,857 INFO L225 Difference]: With dead ends: 9821 [2021-06-05 17:00:55,857 INFO L226 Difference]: Without dead ends: 9821 [2021-06-05 17:00:55,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 461.0ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:00:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9821 states. [2021-06-05 17:00:55,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9821 to 4957. [2021-06-05 17:00:55,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 3.7516142050040355) internal successors, (18593), 4956 states have internal predecessors, (18593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 18593 transitions. [2021-06-05 17:00:55,985 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 18593 transitions. Word has length 28 [2021-06-05 17:00:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:55,985 INFO L482 AbstractCegarLoop]: Abstraction has 4957 states and 18593 transitions. [2021-06-05 17:00:55,985 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 17:00:55,985 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 18593 transitions. [2021-06-05 17:00:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:55,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:55,992 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 17:00:56,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:56,193 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:56,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 78 times [2021-06-05 17:00:56,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:56,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858387010] [2021-06-05 17:00:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:56,226 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 17:00:56,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:56,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858387010] [2021-06-05 17:00:56,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858387010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:56,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342864976] [2021-06-05 17:00:56,226 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 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 17:00:56,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:00:56,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:56,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:00:56,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:56,311 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 17:00:56,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342864976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:56,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:56,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:00:56,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188360475] [2021-06-05 17:00:56,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:00:56,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:56,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:00:56,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:00:56,312 INFO L87 Difference]: Start difference. First operand 4957 states and 18593 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 17:00:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:56,731 INFO L93 Difference]: Finished difference Result 9285 states and 33102 transitions. [2021-06-05 17:00:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:00:56,731 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 17:00:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:56,747 INFO L225 Difference]: With dead ends: 9285 [2021-06-05 17:00:56,747 INFO L226 Difference]: Without dead ends: 9202 [2021-06-05 17:00:56,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 221.2ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:00:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2021-06-05 17:00:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 6390. [2021-06-05 17:00:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6390 states, 6389 states have (on average 3.796994834872437) internal successors, (24259), 6389 states have internal predecessors, (24259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:56,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6390 states to 6390 states and 24259 transitions. [2021-06-05 17:00:56,888 INFO L78 Accepts]: Start accepts. Automaton has 6390 states and 24259 transitions. Word has length 28 [2021-06-05 17:00:56,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:56,888 INFO L482 AbstractCegarLoop]: Abstraction has 6390 states and 24259 transitions. [2021-06-05 17:00:56,888 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 17:00:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 6390 states and 24259 transitions. [2021-06-05 17:00:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:56,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:56,900 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 17:00:57,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-06-05 17:00:57,100 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:57,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 79 times [2021-06-05 17:00:57,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:57,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35328119] [2021-06-05 17:00:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:57,141 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 17:00:57,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:57,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35328119] [2021-06-05 17:00:57,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35328119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:57,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835180787] [2021-06-05 17:00:57,142 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 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 17:00:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:57,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:00:57,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:57,217 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 17:00:57,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835180787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:57,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:57,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 17:00:57,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659378165] [2021-06-05 17:00:57,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:00:57,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:57,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:00:57,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:00:57,218 INFO L87 Difference]: Start difference. First operand 6390 states and 24259 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 17:00:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:57,412 INFO L93 Difference]: Finished difference Result 8836 states and 31362 transitions. [2021-06-05 17:00:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:00:57,412 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 17:00:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:57,427 INFO L225 Difference]: With dead ends: 8836 [2021-06-05 17:00:57,427 INFO L226 Difference]: Without dead ends: 8836 [2021-06-05 17:00:57,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:00:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-06-05 17:00:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 6536. [2021-06-05 17:00:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 6535 states have (on average 3.7749043611323643) internal successors, (24669), 6535 states have internal predecessors, (24669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 24669 transitions. [2021-06-05 17:00:57,542 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 24669 transitions. Word has length 28 [2021-06-05 17:00:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:57,543 INFO L482 AbstractCegarLoop]: Abstraction has 6536 states and 24669 transitions. [2021-06-05 17:00:57,543 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 17:00:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 24669 transitions. [2021-06-05 17:00:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:57,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:57,552 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 17:00:57,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:57,753 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:57,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 80 times [2021-06-05 17:00:57,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:57,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315514980] [2021-06-05 17:00:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:57,793 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 17:00:57,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:57,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315514980] [2021-06-05 17:00:57,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315514980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:57,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483406438] [2021-06-05 17:00:57,793 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 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 17:00:57,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:00:57,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:57,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:57,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:57,878 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 17:00:57,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483406438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:57,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:57,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:00:57,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63223788] [2021-06-05 17:00:57,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:00:57,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:57,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:00:57,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:00:57,879 INFO L87 Difference]: Start difference. First operand 6536 states and 24669 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 17:00:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:58,577 INFO L93 Difference]: Finished difference Result 13521 states and 47319 transitions. [2021-06-05 17:00:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:00:58,578 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 17:00:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:58,604 INFO L225 Difference]: With dead ends: 13521 [2021-06-05 17:00:58,604 INFO L226 Difference]: Without dead ends: 13521 [2021-06-05 17:00:58,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 417.7ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:00:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13521 states. [2021-06-05 17:00:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13521 to 7289. [2021-06-05 17:00:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7289 states, 7288 states have (on average 3.784714599341383) internal successors, (27583), 7288 states have internal predecessors, (27583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7289 states to 7289 states and 27583 transitions. [2021-06-05 17:00:58,812 INFO L78 Accepts]: Start accepts. Automaton has 7289 states and 27583 transitions. Word has length 28 [2021-06-05 17:00:58,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:58,812 INFO L482 AbstractCegarLoop]: Abstraction has 7289 states and 27583 transitions. [2021-06-05 17:00:58,812 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 17:00:58,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7289 states and 27583 transitions. [2021-06-05 17:00:58,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:00:58,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:00:58,822 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 17:00:59,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:00:59,023 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:00:59,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:00:59,023 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 81 times [2021-06-05 17:00:59,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:00:59,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905848889] [2021-06-05 17:00:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:00:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:00:59,057 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 17:00:59,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:00:59,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905848889] [2021-06-05 17:00:59,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905848889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:59,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569320199] [2021-06-05 17:00:59,057 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 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 17:00:59,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:00:59,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:00:59,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:00:59,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:00:59,142 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 17:00:59,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569320199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:00:59,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:00:59,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 17:00:59,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132613481] [2021-06-05 17:00:59,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:00:59,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:00:59,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:00:59,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:00:59,143 INFO L87 Difference]: Start difference. First operand 7289 states and 27583 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 17:00:59,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:00:59,760 INFO L93 Difference]: Finished difference Result 13718 states and 48041 transitions. [2021-06-05 17:00:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:00:59,761 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 17:00:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:00:59,785 INFO L225 Difference]: With dead ends: 13718 [2021-06-05 17:00:59,785 INFO L226 Difference]: Without dead ends: 13718 [2021-06-05 17:00:59,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:00:59,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13718 states. [2021-06-05 17:00:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13718 to 7565. [2021-06-05 17:00:59,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7565 states, 7564 states have (on average 3.7618984664198836) internal successors, (28455), 7564 states have internal predecessors, (28455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:00:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7565 states to 7565 states and 28455 transitions. [2021-06-05 17:00:59,996 INFO L78 Accepts]: Start accepts. Automaton has 7565 states and 28455 transitions. Word has length 28 [2021-06-05 17:00:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:00:59,996 INFO L482 AbstractCegarLoop]: Abstraction has 7565 states and 28455 transitions. [2021-06-05 17:00:59,996 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 17:00:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 7565 states and 28455 transitions. [2021-06-05 17:01:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:00,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:00,008 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 17:01:00,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 17:01:00,209 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:00,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:00,209 INFO L82 PathProgramCache]: Analyzing trace with hash -191201267, now seen corresponding path program 82 times [2021-06-05 17:01:00,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:00,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598222931] [2021-06-05 17:01:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:00,236 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 17:01:00,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:00,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598222931] [2021-06-05 17:01:00,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598222931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:00,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127903472] [2021-06-05 17:01:00,236 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 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 17:01:00,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:00,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:00,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:00,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:00,315 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 17:01:00,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127903472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:00,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:00,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:01:00,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076047993] [2021-06-05 17:01:00,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:01:00,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:00,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:01:00,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:01:00,316 INFO L87 Difference]: Start difference. First operand 7565 states and 28455 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 17:01:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:00,649 INFO L93 Difference]: Finished difference Result 10107 states and 36572 transitions. [2021-06-05 17:01:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:01:00,650 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 17:01:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:00,666 INFO L225 Difference]: With dead ends: 10107 [2021-06-05 17:01:00,667 INFO L226 Difference]: Without dead ends: 10077 [2021-06-05 17:01:00,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:01:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10077 states. [2021-06-05 17:01:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10077 to 8418. [2021-06-05 17:01:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 3.7842461684685755) internal successors, (31852), 8417 states have internal predecessors, (31852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31852 transitions. [2021-06-05 17:01:00,802 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31852 transitions. Word has length 28 [2021-06-05 17:01:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:00,802 INFO L482 AbstractCegarLoop]: Abstraction has 8418 states and 31852 transitions. [2021-06-05 17:01:00,802 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 17:01:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31852 transitions. [2021-06-05 17:01:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:00,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:00,813 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 17:01:01,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 17:01:01,014 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:01,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:01,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 83 times [2021-06-05 17:01:01,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:01,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321193427] [2021-06-05 17:01:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:01,062 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 17:01:01,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:01,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321193427] [2021-06-05 17:01:01,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321193427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:01,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238940590] [2021-06-05 17:01:01,062 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 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 17:01:01,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:01:01,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:01,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:01,176 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 17:01:01,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238940590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:01,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:01,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:01:01,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076110057] [2021-06-05 17:01:01,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:01:01,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:01,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:01:01,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:01:01,177 INFO L87 Difference]: Start difference. First operand 8418 states and 31852 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 17:01:01,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:01,576 INFO L93 Difference]: Finished difference Result 10717 states and 38597 transitions. [2021-06-05 17:01:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:01:01,576 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 17:01:01,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:01,596 INFO L225 Difference]: With dead ends: 10717 [2021-06-05 17:01:01,597 INFO L226 Difference]: Without dead ends: 10717 [2021-06-05 17:01:01,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:01:01,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10717 states. [2021-06-05 17:01:01,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10717 to 8458. [2021-06-05 17:01:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8458 states, 8457 states have (on average 3.780418588151827) internal successors, (31971), 8457 states have internal predecessors, (31971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8458 states to 8458 states and 31971 transitions. [2021-06-05 17:01:01,773 INFO L78 Accepts]: Start accepts. Automaton has 8458 states and 31971 transitions. Word has length 28 [2021-06-05 17:01:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:01,773 INFO L482 AbstractCegarLoop]: Abstraction has 8458 states and 31971 transitions. [2021-06-05 17:01:01,773 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 17:01:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 8458 states and 31971 transitions. [2021-06-05 17:01:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:01,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:01,785 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 17:01:01,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:01,985 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:01,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:01,985 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 84 times [2021-06-05 17:01:01,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:01,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117854611] [2021-06-05 17:01:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:02,018 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 17:01:02,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:02,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117854611] [2021-06-05 17:01:02,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117854611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:02,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625880551] [2021-06-05 17:01:02,018 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 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 17:01:02,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:01:02,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:02,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:02,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:02,098 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 17:01:02,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625880551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:02,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:02,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 17:01:02,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559203295] [2021-06-05 17:01:02,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:01:02,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:02,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:01:02,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:01:02,099 INFO L87 Difference]: Start difference. First operand 8458 states and 31971 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 17:01:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:02,670 INFO L93 Difference]: Finished difference Result 14431 states and 51407 transitions. [2021-06-05 17:01:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:01:02,671 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 17:01:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:02,700 INFO L225 Difference]: With dead ends: 14431 [2021-06-05 17:01:02,700 INFO L226 Difference]: Without dead ends: 14427 [2021-06-05 17:01:02,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:01:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2021-06-05 17:01:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 8356. [2021-06-05 17:01:02,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8356 states, 8355 states have (on average 3.784320766008378) internal successors, (31618), 8355 states have internal predecessors, (31618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8356 states to 8356 states and 31618 transitions. [2021-06-05 17:01:02,936 INFO L78 Accepts]: Start accepts. Automaton has 8356 states and 31618 transitions. Word has length 28 [2021-06-05 17:01:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:02,937 INFO L482 AbstractCegarLoop]: Abstraction has 8356 states and 31618 transitions. [2021-06-05 17:01:02,937 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 17:01:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 8356 states and 31618 transitions. [2021-06-05 17:01:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:02,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:02,948 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 17:01:03,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 17:01:03,149 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash 795274241, now seen corresponding path program 85 times [2021-06-05 17:01:03,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:03,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699562420] [2021-06-05 17:01:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:03,185 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 17:01:03,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:03,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699562420] [2021-06-05 17:01:03,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699562420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:03,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575021931] [2021-06-05 17:01:03,186 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 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 17:01:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:03,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:03,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:03,301 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 17:01:03,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575021931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:03,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:03,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:01:03,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024180115] [2021-06-05 17:01:03,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:01:03,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:03,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:01:03,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:01:03,302 INFO L87 Difference]: Start difference. First operand 8356 states and 31618 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 17:01:03,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:03,728 INFO L93 Difference]: Finished difference Result 10928 states and 39376 transitions. [2021-06-05 17:01:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:01:03,729 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 17:01:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:03,748 INFO L225 Difference]: With dead ends: 10928 [2021-06-05 17:01:03,749 INFO L226 Difference]: Without dead ends: 10928 [2021-06-05 17:01:03,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:01:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10928 states. [2021-06-05 17:01:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10928 to 8277. [2021-06-05 17:01:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8277 states, 8276 states have (on average 3.779603673272112) internal successors, (31280), 8276 states have internal predecessors, (31280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 31280 transitions. [2021-06-05 17:01:03,904 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 31280 transitions. Word has length 28 [2021-06-05 17:01:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:03,904 INFO L482 AbstractCegarLoop]: Abstraction has 8277 states and 31280 transitions. [2021-06-05 17:01:03,904 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 17:01:03,904 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 31280 transitions. [2021-06-05 17:01:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:03,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:03,917 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 17:01:04,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:04,133 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:04,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 86 times [2021-06-05 17:01:04,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:04,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884057387] [2021-06-05 17:01:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:04,175 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 17:01:04,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:04,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884057387] [2021-06-05 17:01:04,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884057387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:04,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145149377] [2021-06-05 17:01:04,175 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 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 17:01:04,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:04,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:04,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:04,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:04,253 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 17:01:04,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145149377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:04,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:04,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:01:04,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797714740] [2021-06-05 17:01:04,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:04,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:04,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:04,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:04,254 INFO L87 Difference]: Start difference. First operand 8277 states and 31280 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 17:01:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:04,954 INFO L93 Difference]: Finished difference Result 14287 states and 50815 transitions. [2021-06-05 17:01:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:01:04,955 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 17:01:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:04,983 INFO L225 Difference]: With dead ends: 14287 [2021-06-05 17:01:04,983 INFO L226 Difference]: Without dead ends: 14275 [2021-06-05 17:01:04,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:01:04,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14275 states. [2021-06-05 17:01:05,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14275 to 8277. [2021-06-05 17:01:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8277 states, 8276 states have (on average 3.7791203479942) internal successors, (31276), 8276 states have internal predecessors, (31276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 31276 transitions. [2021-06-05 17:01:05,184 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 31276 transitions. Word has length 28 [2021-06-05 17:01:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:05,184 INFO L482 AbstractCegarLoop]: Abstraction has 8277 states and 31276 transitions. [2021-06-05 17:01:05,184 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 17:01:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 31276 transitions. [2021-06-05 17:01:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:05,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:05,196 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 17:01:05,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 17:01:05,397 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:05,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:05,397 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 87 times [2021-06-05 17:01:05,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:05,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183408024] [2021-06-05 17:01:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:05,445 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 17:01:05,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:05,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183408024] [2021-06-05 17:01:05,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183408024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:05,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581458103] [2021-06-05 17:01:05,445 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 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 17:01:05,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:01:05,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:05,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:05,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:05,543 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 17:01:05,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581458103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:05,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:05,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:01:05,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591576381] [2021-06-05 17:01:05,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:05,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:05,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:05,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:05,544 INFO L87 Difference]: Start difference. First operand 8277 states and 31276 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 17:01:06,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:06,699 INFO L93 Difference]: Finished difference Result 21967 states and 76854 transitions. [2021-06-05 17:01:06,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 17:01:06,699 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 17:01:06,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:06,741 INFO L225 Difference]: With dead ends: 21967 [2021-06-05 17:01:06,741 INFO L226 Difference]: Without dead ends: 21967 [2021-06-05 17:01:06,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 690.8ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 17:01:06,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21967 states. [2021-06-05 17:01:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21967 to 11428. [2021-06-05 17:01:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11428 states, 11427 states have (on average 3.8238382777631923) internal successors, (43695), 11427 states have internal predecessors, (43695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11428 states to 11428 states and 43695 transitions. [2021-06-05 17:01:07,076 INFO L78 Accepts]: Start accepts. Automaton has 11428 states and 43695 transitions. Word has length 28 [2021-06-05 17:01:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:07,076 INFO L482 AbstractCegarLoop]: Abstraction has 11428 states and 43695 transitions. [2021-06-05 17:01:07,076 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 17:01:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 11428 states and 43695 transitions. [2021-06-05 17:01:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:07,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:07,093 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 17:01:07,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 17:01:07,293 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:07,294 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 88 times [2021-06-05 17:01:07,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:07,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966972477] [2021-06-05 17:01:07,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:07,335 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 17:01:07,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:07,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966972477] [2021-06-05 17:01:07,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966972477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:07,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719032574] [2021-06-05 17:01:07,335 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 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 17:01:07,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:07,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:07,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:07,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:07,424 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 17:01:07,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719032574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:07,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:07,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:01:07,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74263623] [2021-06-05 17:01:07,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:07,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:07,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:07,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:07,425 INFO L87 Difference]: Start difference. First operand 11428 states and 43695 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 17:01:08,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:08,610 INFO L93 Difference]: Finished difference Result 21082 states and 74573 transitions. [2021-06-05 17:01:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:01:08,611 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 17:01:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:08,655 INFO L225 Difference]: With dead ends: 21082 [2021-06-05 17:01:08,655 INFO L226 Difference]: Without dead ends: 21070 [2021-06-05 17:01:08,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 740.5ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:01:08,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21070 states. [2021-06-05 17:01:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21070 to 11250. [2021-06-05 17:01:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11250 states, 11249 states have (on average 3.8307405102675793) internal successors, (43092), 11249 states have internal predecessors, (43092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11250 states to 11250 states and 43092 transitions. [2021-06-05 17:01:08,975 INFO L78 Accepts]: Start accepts. Automaton has 11250 states and 43092 transitions. Word has length 28 [2021-06-05 17:01:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:08,975 INFO L482 AbstractCegarLoop]: Abstraction has 11250 states and 43092 transitions. [2021-06-05 17:01:08,975 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 17:01:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 11250 states and 43092 transitions. [2021-06-05 17:01:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:08,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:08,992 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 17:01:09,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:09,193 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:09,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 89 times [2021-06-05 17:01:09,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:09,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214087850] [2021-06-05 17:01:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:09,246 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 17:01:09,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:09,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214087850] [2021-06-05 17:01:09,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214087850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:09,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431555927] [2021-06-05 17:01:09,247 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 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 17:01:09,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:01:09,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:09,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:09,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:09,335 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 17:01:09,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431555927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:09,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:09,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:01:09,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772049082] [2021-06-05 17:01:09,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:09,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:09,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:09,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:09,336 INFO L87 Difference]: Start difference. First operand 11250 states and 43092 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 17:01:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:10,364 INFO L93 Difference]: Finished difference Result 20939 states and 73944 transitions. [2021-06-05 17:01:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:01:10,365 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 17:01:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:10,402 INFO L225 Difference]: With dead ends: 20939 [2021-06-05 17:01:10,402 INFO L226 Difference]: Without dead ends: 20903 [2021-06-05 17:01:10,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 552.6ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:01:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20903 states. [2021-06-05 17:01:10,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20903 to 11290. [2021-06-05 17:01:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11290 states, 11289 states have (on average 3.8302772610505804) internal successors, (43240), 11289 states have internal predecessors, (43240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11290 states to 11290 states and 43240 transitions. [2021-06-05 17:01:10,699 INFO L78 Accepts]: Start accepts. Automaton has 11290 states and 43240 transitions. Word has length 28 [2021-06-05 17:01:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:10,699 INFO L482 AbstractCegarLoop]: Abstraction has 11290 states and 43240 transitions. [2021-06-05 17:01:10,699 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 17:01:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 11290 states and 43240 transitions. [2021-06-05 17:01:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:10,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:10,716 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 17:01:10,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:10,916 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:10,916 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 90 times [2021-06-05 17:01:10,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:10,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725731992] [2021-06-05 17:01:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:10,955 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 17:01:10,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:10,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725731992] [2021-06-05 17:01:10,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725731992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:10,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607294618] [2021-06-05 17:01:10,955 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 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 17:01:10,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:01:10,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:10,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:10,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:11,072 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 17:01:11,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607294618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:11,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:11,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:01:11,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362862808] [2021-06-05 17:01:11,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:11,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:11,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:11,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:11,073 INFO L87 Difference]: Start difference. First operand 11290 states and 43240 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 17:01:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:12,448 INFO L93 Difference]: Finished difference Result 20726 states and 73402 transitions. [2021-06-05 17:01:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 17:01:12,448 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 17:01:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:12,488 INFO L225 Difference]: With dead ends: 20726 [2021-06-05 17:01:12,488 INFO L226 Difference]: Without dead ends: 20726 [2021-06-05 17:01:12,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 886.1ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:01:12,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20726 states. [2021-06-05 17:01:12,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20726 to 11482. [2021-06-05 17:01:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11482 states, 11481 states have (on average 3.8212699242226287) internal successors, (43872), 11481 states have internal predecessors, (43872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11482 states to 11482 states and 43872 transitions. [2021-06-05 17:01:12,777 INFO L78 Accepts]: Start accepts. Automaton has 11482 states and 43872 transitions. Word has length 28 [2021-06-05 17:01:12,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:12,778 INFO L482 AbstractCegarLoop]: Abstraction has 11482 states and 43872 transitions. [2021-06-05 17:01:12,778 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 17:01:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 11482 states and 43872 transitions. [2021-06-05 17:01:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:12,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:12,794 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 17:01:12,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 17:01:12,994 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:12,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 91 times [2021-06-05 17:01:12,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:12,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023150631] [2021-06-05 17:01:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:13,033 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 17:01:13,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:13,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023150631] [2021-06-05 17:01:13,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023150631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:13,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497276469] [2021-06-05 17:01:13,033 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 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 17:01:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:13,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:13,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:13,161 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 17:01:13,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497276469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:13,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:13,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:01:13,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203273014] [2021-06-05 17:01:13,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:13,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:13,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:13,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:13,163 INFO L87 Difference]: Start difference. First operand 11482 states and 43872 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 17:01:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:14,590 INFO L93 Difference]: Finished difference Result 20187 states and 71933 transitions. [2021-06-05 17:01:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:01:14,591 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 17:01:14,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:14,630 INFO L225 Difference]: With dead ends: 20187 [2021-06-05 17:01:14,630 INFO L226 Difference]: Without dead ends: 20175 [2021-06-05 17:01:14,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 857.6ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 17:01:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20175 states. [2021-06-05 17:01:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20175 to 11366. [2021-06-05 17:01:14,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11366 states, 11365 states have (on average 3.825780906291245) internal successors, (43480), 11365 states have internal predecessors, (43480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11366 states to 11366 states and 43480 transitions. [2021-06-05 17:01:14,913 INFO L78 Accepts]: Start accepts. Automaton has 11366 states and 43480 transitions. Word has length 28 [2021-06-05 17:01:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:14,914 INFO L482 AbstractCegarLoop]: Abstraction has 11366 states and 43480 transitions. [2021-06-05 17:01:14,914 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 17:01:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 11366 states and 43480 transitions. [2021-06-05 17:01:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:14,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:14,930 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 17:01:15,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 17:01:15,130 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:15,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:15,131 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 92 times [2021-06-05 17:01:15,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:15,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004649908] [2021-06-05 17:01:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:15,169 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 17:01:15,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:15,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004649908] [2021-06-05 17:01:15,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004649908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:15,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431411035] [2021-06-05 17:01:15,170 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 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 17:01:15,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:15,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:15,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:15,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:15,267 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 17:01:15,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431411035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:15,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:15,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 17:01:15,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618060828] [2021-06-05 17:01:15,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:01:15,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:15,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:01:15,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:01:15,268 INFO L87 Difference]: Start difference. First operand 11366 states and 43480 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 17:01:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:16,325 INFO L93 Difference]: Finished difference Result 19429 states and 69858 transitions. [2021-06-05 17:01:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:01:16,325 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 17:01:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:16,363 INFO L225 Difference]: With dead ends: 19429 [2021-06-05 17:01:16,363 INFO L226 Difference]: Without dead ends: 19393 [2021-06-05 17:01:16,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 635.0ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:01:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19393 states. [2021-06-05 17:01:16,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19393 to 11390. [2021-06-05 17:01:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11390 states, 11389 states have (on average 3.8247431732373345) internal successors, (43560), 11389 states have internal predecessors, (43560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11390 states to 11390 states and 43560 transitions. [2021-06-05 17:01:16,686 INFO L78 Accepts]: Start accepts. Automaton has 11390 states and 43560 transitions. Word has length 28 [2021-06-05 17:01:16,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:16,686 INFO L482 AbstractCegarLoop]: Abstraction has 11390 states and 43560 transitions. [2021-06-05 17:01:16,686 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 17:01:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 11390 states and 43560 transitions. [2021-06-05 17:01:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:16,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:16,705 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 17:01:16,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 17:01:16,905 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 93 times [2021-06-05 17:01:16,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:16,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468894646] [2021-06-05 17:01:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:16,941 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 17:01:16,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:16,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468894646] [2021-06-05 17:01:16,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468894646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:16,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245300198] [2021-06-05 17:01:16,942 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 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 17:01:16,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:01:16,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:16,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:16,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:17,083 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 17:01:17,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245300198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:17,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:17,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:01:17,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359534484] [2021-06-05 17:01:17,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:17,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:17,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:17,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:17,084 INFO L87 Difference]: Start difference. First operand 11390 states and 43560 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 17:01:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:18,394 INFO L93 Difference]: Finished difference Result 28523 states and 101952 transitions. [2021-06-05 17:01:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 17:01:18,394 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 17:01:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:18,458 INFO L225 Difference]: With dead ends: 28523 [2021-06-05 17:01:18,458 INFO L226 Difference]: Without dead ends: 28523 [2021-06-05 17:01:18,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 765.1ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 17:01:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28523 states. [2021-06-05 17:01:18,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28523 to 11724. [2021-06-05 17:01:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11724 states, 11723 states have (on average 3.850294293269641) internal successors, (45137), 11723 states have internal predecessors, (45137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11724 states to 11724 states and 45137 transitions. [2021-06-05 17:01:18,883 INFO L78 Accepts]: Start accepts. Automaton has 11724 states and 45137 transitions. Word has length 28 [2021-06-05 17:01:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:18,883 INFO L482 AbstractCegarLoop]: Abstraction has 11724 states and 45137 transitions. [2021-06-05 17:01:18,883 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 17:01:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 11724 states and 45137 transitions. [2021-06-05 17:01:18,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:18,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:18,900 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 17:01:19,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 17:01:19,100 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:19,100 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 94 times [2021-06-05 17:01:19,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:19,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292492953] [2021-06-05 17:01:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:19,133 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 17:01:19,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:19,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292492953] [2021-06-05 17:01:19,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292492953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:19,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198569007] [2021-06-05 17:01:19,134 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 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 17:01:19,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:19,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:19,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:19,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:19,254 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 17:01:19,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198569007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:19,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:19,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:01:19,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085018936] [2021-06-05 17:01:19,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:19,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:19,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:19,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:19,255 INFO L87 Difference]: Start difference. First operand 11724 states and 45137 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 17:01:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:20,434 INFO L93 Difference]: Finished difference Result 27968 states and 100678 transitions. [2021-06-05 17:01:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 17:01:20,434 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 17:01:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:20,499 INFO L225 Difference]: With dead ends: 27968 [2021-06-05 17:01:20,499 INFO L226 Difference]: Without dead ends: 27968 [2021-06-05 17:01:20,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 725.1ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 17:01:20,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27968 states. [2021-06-05 17:01:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27968 to 11614. [2021-06-05 17:01:20,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11614 states, 11613 states have (on average 3.837595797812796) internal successors, (44566), 11613 states have internal predecessors, (44566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11614 states to 11614 states and 44566 transitions. [2021-06-05 17:01:20,994 INFO L78 Accepts]: Start accepts. Automaton has 11614 states and 44566 transitions. Word has length 28 [2021-06-05 17:01:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:20,995 INFO L482 AbstractCegarLoop]: Abstraction has 11614 states and 44566 transitions. [2021-06-05 17:01:20,995 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 17:01:20,995 INFO L276 IsEmpty]: Start isEmpty. Operand 11614 states and 44566 transitions. [2021-06-05 17:01:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:21,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:21,011 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 17:01:21,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 17:01:21,211 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:21,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:21,212 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 95 times [2021-06-05 17:01:21,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:21,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112975247] [2021-06-05 17:01:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:21,245 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 17:01:21,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:21,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112975247] [2021-06-05 17:01:21,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112975247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:21,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845082338] [2021-06-05 17:01:21,245 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 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 17:01:21,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:01:21,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:21,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:21,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:21,360 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 17:01:21,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845082338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:21,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:21,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:01:21,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991519500] [2021-06-05 17:01:21,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:01:21,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:01:21,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:01:21,361 INFO L87 Difference]: Start difference. First operand 11614 states and 44566 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 17:01:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:22,183 INFO L93 Difference]: Finished difference Result 22124 states and 79964 transitions. [2021-06-05 17:01:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:01:22,183 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 17:01:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:22,226 INFO L225 Difference]: With dead ends: 22124 [2021-06-05 17:01:22,227 INFO L226 Difference]: Without dead ends: 22124 [2021-06-05 17:01:22,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 465.3ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:01:22,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22124 states. [2021-06-05 17:01:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22124 to 11623. [2021-06-05 17:01:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11623 states, 11622 states have (on average 3.8366029943211153) internal successors, (44589), 11622 states have internal predecessors, (44589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11623 states to 11623 states and 44589 transitions. [2021-06-05 17:01:22,509 INFO L78 Accepts]: Start accepts. Automaton has 11623 states and 44589 transitions. Word has length 28 [2021-06-05 17:01:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:22,510 INFO L482 AbstractCegarLoop]: Abstraction has 11623 states and 44589 transitions. [2021-06-05 17:01:22,510 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 17:01:22,510 INFO L276 IsEmpty]: Start isEmpty. Operand 11623 states and 44589 transitions. [2021-06-05 17:01:22,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:22,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:22,527 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 17:01:22,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:22,727 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:22,728 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 96 times [2021-06-05 17:01:22,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:22,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66685923] [2021-06-05 17:01:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:22,761 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 17:01:22,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:22,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66685923] [2021-06-05 17:01:22,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66685923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:22,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822845285] [2021-06-05 17:01:22,761 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 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 17:01:22,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:01:22,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:22,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:22,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:22,873 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 17:01:22,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822845285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:22,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:22,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:01:22,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980585691] [2021-06-05 17:01:22,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:01:22,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:22,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:01:22,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:01:22,874 INFO L87 Difference]: Start difference. First operand 11623 states and 44589 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 17:01:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:23,661 INFO L93 Difference]: Finished difference Result 20483 states and 74724 transitions. [2021-06-05 17:01:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:01:23,662 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 17:01:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:23,700 INFO L225 Difference]: With dead ends: 20483 [2021-06-05 17:01:23,700 INFO L226 Difference]: Without dead ends: 20483 [2021-06-05 17:01:23,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 408.9ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:01:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20483 states. [2021-06-05 17:01:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20483 to 11635. [2021-06-05 17:01:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 11634 states have (on average 3.8359119821213685) internal successors, (44627), 11634 states have internal predecessors, (44627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 44627 transitions. [2021-06-05 17:01:23,966 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 44627 transitions. Word has length 28 [2021-06-05 17:01:23,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:23,966 INFO L482 AbstractCegarLoop]: Abstraction has 11635 states and 44627 transitions. [2021-06-05 17:01:23,966 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 17:01:23,966 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 44627 transitions. [2021-06-05 17:01:23,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:23,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:23,983 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 17:01:24,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 17:01:24,184 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:24,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 97 times [2021-06-05 17:01:24,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:24,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162720641] [2021-06-05 17:01:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:24,217 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 17:01:24,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:24,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162720641] [2021-06-05 17:01:24,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162720641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:24,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889301157] [2021-06-05 17:01:24,218 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 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 17:01:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:24,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:24,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:24,338 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 17:01:24,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889301157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:24,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:24,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:01:24,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582621839] [2021-06-05 17:01:24,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:24,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:24,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:24,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:24,339 INFO L87 Difference]: Start difference. First operand 11635 states and 44627 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 17:01:25,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:25,414 INFO L93 Difference]: Finished difference Result 21266 states and 76961 transitions. [2021-06-05 17:01:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 17:01:25,414 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 17:01:25,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:25,455 INFO L225 Difference]: With dead ends: 21266 [2021-06-05 17:01:25,455 INFO L226 Difference]: Without dead ends: 21266 [2021-06-05 17:01:25,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 660.6ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 17:01:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21266 states. [2021-06-05 17:01:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21266 to 11743. [2021-06-05 17:01:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 3.8290751149718956) internal successors, (44961), 11742 states have internal predecessors, (44961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 44961 transitions. [2021-06-05 17:01:25,855 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 44961 transitions. Word has length 28 [2021-06-05 17:01:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:25,855 INFO L482 AbstractCegarLoop]: Abstraction has 11743 states and 44961 transitions. [2021-06-05 17:01:25,855 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 17:01:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 44961 transitions. [2021-06-05 17:01:25,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:25,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:25,874 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 17:01:26,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:26,074 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:26,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:26,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 98 times [2021-06-05 17:01:26,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:26,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644029737] [2021-06-05 17:01:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:26,111 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 17:01:26,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:26,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644029737] [2021-06-05 17:01:26,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644029737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:26,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050130635] [2021-06-05 17:01:26,111 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 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 17:01:26,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:26,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:26,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:26,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:26,237 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 17:01:26,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050130635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:26,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:26,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:01:26,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252730591] [2021-06-05 17:01:26,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:26,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:26,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:26,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:26,238 INFO L87 Difference]: Start difference. First operand 11743 states and 44961 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 17:01:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:27,233 INFO L93 Difference]: Finished difference Result 20647 states and 75257 transitions. [2021-06-05 17:01:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:01:27,233 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 17:01:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:27,278 INFO L225 Difference]: With dead ends: 20647 [2021-06-05 17:01:27,278 INFO L226 Difference]: Without dead ends: 20643 [2021-06-05 17:01:27,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 591.8ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:01:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20643 states. [2021-06-05 17:01:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20643 to 11669. [2021-06-05 17:01:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11669 states, 11668 states have (on average 3.8328762427151184) internal successors, (44722), 11668 states have internal predecessors, (44722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11669 states to 11669 states and 44722 transitions. [2021-06-05 17:01:27,641 INFO L78 Accepts]: Start accepts. Automaton has 11669 states and 44722 transitions. Word has length 28 [2021-06-05 17:01:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:27,641 INFO L482 AbstractCegarLoop]: Abstraction has 11669 states and 44722 transitions. [2021-06-05 17:01:27,641 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 17:01:27,641 INFO L276 IsEmpty]: Start isEmpty. Operand 11669 states and 44722 transitions. [2021-06-05 17:01:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:27,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:27,659 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 17:01:27,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:27,859 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:27,860 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 99 times [2021-06-05 17:01:27,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:27,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464430791] [2021-06-05 17:01:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:27,913 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 17:01:27,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:27,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464430791] [2021-06-05 17:01:27,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464430791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:27,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912257302] [2021-06-05 17:01:27,913 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 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 17:01:27,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:01:27,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:27,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:27,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:28,053 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 17:01:28,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912257302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:28,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:28,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:01:28,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966179896] [2021-06-05 17:01:28,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:28,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:28,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:28,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:28,054 INFO L87 Difference]: Start difference. First operand 11669 states and 44722 transitions. Second operand has 16 states, 16 states have (on average 2.625) 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 17:01:29,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:29,072 INFO L93 Difference]: Finished difference Result 19952 states and 72022 transitions. [2021-06-05 17:01:29,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:01:29,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) 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 28 [2021-06-05 17:01:29,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:29,110 INFO L225 Difference]: With dead ends: 19952 [2021-06-05 17:01:29,110 INFO L226 Difference]: Without dead ends: 19952 [2021-06-05 17:01:29,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 648.7ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 17:01:29,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19952 states. [2021-06-05 17:01:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19952 to 11896. [2021-06-05 17:01:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11896 states, 11895 states have (on average 3.8352248844052124) internal successors, (45620), 11895 states have internal predecessors, (45620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:29,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11896 states to 11896 states and 45620 transitions. [2021-06-05 17:01:29,463 INFO L78 Accepts]: Start accepts. Automaton has 11896 states and 45620 transitions. Word has length 28 [2021-06-05 17:01:29,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:29,463 INFO L482 AbstractCegarLoop]: Abstraction has 11896 states and 45620 transitions. [2021-06-05 17:01:29,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) 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 17:01:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 11896 states and 45620 transitions. [2021-06-05 17:01:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:29,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:29,480 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 17:01:29,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-06-05 17:01:29,681 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:29,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 100 times [2021-06-05 17:01:29,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:29,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231227308] [2021-06-05 17:01:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:29,720 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 17:01:29,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:29,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231227308] [2021-06-05 17:01:29,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231227308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:29,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494196935] [2021-06-05 17:01:29,721 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 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 17:01:29,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:29,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:29,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:29,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:29,827 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 17:01:29,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494196935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:29,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:29,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:01:29,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947957844] [2021-06-05 17:01:29,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:29,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:29,828 INFO L87 Difference]: Start difference. First operand 11896 states and 45620 transitions. Second operand has 16 states, 16 states have (on average 2.625) 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 17:01:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:30,757 INFO L93 Difference]: Finished difference Result 19483 states and 70731 transitions. [2021-06-05 17:01:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:01:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) 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 28 [2021-06-05 17:01:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:30,794 INFO L225 Difference]: With dead ends: 19483 [2021-06-05 17:01:30,794 INFO L226 Difference]: Without dead ends: 19471 [2021-06-05 17:01:30,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 550.9ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:01:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19471 states. [2021-06-05 17:01:31,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19471 to 11998. [2021-06-05 17:01:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11998 states, 11997 states have (on average 3.8295407185129617) internal successors, (45943), 11997 states have internal predecessors, (45943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:31,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11998 states to 11998 states and 45943 transitions. [2021-06-05 17:01:31,059 INFO L78 Accepts]: Start accepts. Automaton has 11998 states and 45943 transitions. Word has length 28 [2021-06-05 17:01:31,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:31,059 INFO L482 AbstractCegarLoop]: Abstraction has 11998 states and 45943 transitions. [2021-06-05 17:01:31,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) 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 17:01:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 11998 states and 45943 transitions. [2021-06-05 17:01:31,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:31,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:31,076 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 17:01:31,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:31,276 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:31,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 77 times [2021-06-05 17:01:31,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:31,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217313882] [2021-06-05 17:01:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:31,315 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 17:01:31,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:31,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217313882] [2021-06-05 17:01:31,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217313882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:31,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025354480] [2021-06-05 17:01:31,316 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 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 17:01:31,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:01:31,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:31,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:31,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:31,400 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 17:01:31,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025354480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:31,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:31,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:01:31,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141097249] [2021-06-05 17:01:31,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:31,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:31,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:31,401 INFO L87 Difference]: Start difference. First operand 11998 states and 45943 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 17:01:31,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:31,881 INFO L93 Difference]: Finished difference Result 16918 states and 62875 transitions. [2021-06-05 17:01:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:01:31,882 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 17:01:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:31,915 INFO L225 Difference]: With dead ends: 16918 [2021-06-05 17:01:31,915 INFO L226 Difference]: Without dead ends: 16918 [2021-06-05 17:01:31,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:01:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16918 states. [2021-06-05 17:01:32,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16918 to 12070. [2021-06-05 17:01:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12070 states, 12069 states have (on average 3.824923357361836) internal successors, (46163), 12069 states have internal predecessors, (46163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12070 states to 12070 states and 46163 transitions. [2021-06-05 17:01:32,163 INFO L78 Accepts]: Start accepts. Automaton has 12070 states and 46163 transitions. Word has length 28 [2021-06-05 17:01:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:32,163 INFO L482 AbstractCegarLoop]: Abstraction has 12070 states and 46163 transitions. [2021-06-05 17:01:32,163 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 17:01:32,163 INFO L276 IsEmpty]: Start isEmpty. Operand 12070 states and 46163 transitions. [2021-06-05 17:01:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:32,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:32,181 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 17:01:32,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 17:01:32,382 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:32,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:32,382 INFO L82 PathProgramCache]: Analyzing trace with hash -869150583, now seen corresponding path program 78 times [2021-06-05 17:01:32,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:32,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802575373] [2021-06-05 17:01:32,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:32,414 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 17:01:32,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:32,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802575373] [2021-06-05 17:01:32,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802575373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:32,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456837409] [2021-06-05 17:01:32,414 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 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 17:01:32,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:01:32,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:32,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:32,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:32,525 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 17:01:32,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456837409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:32,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:32,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 17:01:32,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642032474] [2021-06-05 17:01:32,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:32,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:32,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:32,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:32,526 INFO L87 Difference]: Start difference. First operand 12070 states and 46163 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 17:01:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:32,970 INFO L93 Difference]: Finished difference Result 15210 states and 56302 transitions. [2021-06-05 17:01:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:01:32,971 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 17:01:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:33,000 INFO L225 Difference]: With dead ends: 15210 [2021-06-05 17:01:33,000 INFO L226 Difference]: Without dead ends: 15169 [2021-06-05 17:01:33,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:01:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15169 states. [2021-06-05 17:01:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15169 to 11722. [2021-06-05 17:01:33,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11722 states, 11721 states have (on average 3.8192133776981487) internal successors, (44765), 11721 states have internal predecessors, (44765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11722 states to 11722 states and 44765 transitions. [2021-06-05 17:01:33,212 INFO L78 Accepts]: Start accepts. Automaton has 11722 states and 44765 transitions. Word has length 28 [2021-06-05 17:01:33,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:33,213 INFO L482 AbstractCegarLoop]: Abstraction has 11722 states and 44765 transitions. [2021-06-05 17:01:33,213 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 17:01:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 11722 states and 44765 transitions. [2021-06-05 17:01:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:33,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:33,231 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 17:01:33,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 17:01:33,432 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:33,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:33,432 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 79 times [2021-06-05 17:01:33,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:33,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649919081] [2021-06-05 17:01:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:33,474 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 17:01:33,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:33,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649919081] [2021-06-05 17:01:33,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649919081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:33,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950937409] [2021-06-05 17:01:33,474 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 17:01:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:33,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:33,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:33,558 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 17:01:33,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950937409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:33,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:33,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:01:33,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010168410] [2021-06-05 17:01:33,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:01:33,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:33,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:01:33,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:01:33,559 INFO L87 Difference]: Start difference. First operand 11722 states and 44765 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 17:01:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:34,069 INFO L93 Difference]: Finished difference Result 17574 states and 64350 transitions. [2021-06-05 17:01:34,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:01:34,069 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 17:01:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:34,103 INFO L225 Difference]: With dead ends: 17574 [2021-06-05 17:01:34,103 INFO L226 Difference]: Without dead ends: 17574 [2021-06-05 17:01:34,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:01:34,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17574 states. [2021-06-05 17:01:34,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17574 to 12034. [2021-06-05 17:01:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12034 states, 12033 states have (on average 3.802626111526635) internal successors, (45757), 12033 states have internal predecessors, (45757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12034 states to 12034 states and 45757 transitions. [2021-06-05 17:01:34,370 INFO L78 Accepts]: Start accepts. Automaton has 12034 states and 45757 transitions. Word has length 28 [2021-06-05 17:01:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:34,370 INFO L482 AbstractCegarLoop]: Abstraction has 12034 states and 45757 transitions. [2021-06-05 17:01:34,370 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 17:01:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 12034 states and 45757 transitions. [2021-06-05 17:01:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:34,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:34,389 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 17:01:34,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 17:01:34,590 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:34,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:34,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1138878323, now seen corresponding path program 80 times [2021-06-05 17:01:34,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:34,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384381322] [2021-06-05 17:01:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:01:34,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:34,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384381322] [2021-06-05 17:01:34,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384381322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:34,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931465719] [2021-06-05 17:01:34,622 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 17:01:34,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:34,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:34,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:34,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:34,738 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 17:01:34,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931465719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:34,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:34,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 17:01:34,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951403756] [2021-06-05 17:01:34,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:34,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:34,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:34,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:34,739 INFO L87 Difference]: Start difference. First operand 12034 states and 45757 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 17:01:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:35,204 INFO L93 Difference]: Finished difference Result 16784 states and 62443 transitions. [2021-06-05 17:01:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:01:35,205 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 17:01:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:35,238 INFO L225 Difference]: With dead ends: 16784 [2021-06-05 17:01:35,238 INFO L226 Difference]: Without dead ends: 16774 [2021-06-05 17:01:35,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:01:35,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16774 states. [2021-06-05 17:01:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16774 to 14052. [2021-06-05 17:01:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14052 states, 14051 states have (on average 3.8370222759945913) internal successors, (53914), 14051 states have internal predecessors, (53914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14052 states to 14052 states and 53914 transitions. [2021-06-05 17:01:35,521 INFO L78 Accepts]: Start accepts. Automaton has 14052 states and 53914 transitions. Word has length 28 [2021-06-05 17:01:35,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:35,521 INFO L482 AbstractCegarLoop]: Abstraction has 14052 states and 53914 transitions. [2021-06-05 17:01:35,521 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 17:01:35,521 INFO L276 IsEmpty]: Start isEmpty. Operand 14052 states and 53914 transitions. [2021-06-05 17:01:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:35,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:35,542 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 17:01:35,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 17:01:35,743 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:35,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:35,743 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 81 times [2021-06-05 17:01:35,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:35,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443549727] [2021-06-05 17:01:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:35,889 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 17:01:35,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:35,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443549727] [2021-06-05 17:01:35,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443549727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:35,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749690781] [2021-06-05 17:01:35,889 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 17:01:35,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 17:01:35,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:35,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:35,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:35,994 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 17:01:35,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749690781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:35,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:35,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:01:35,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012152707] [2021-06-05 17:01:35,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:01:35,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:35,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:01:35,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:01:35,995 INFO L87 Difference]: Start difference. First operand 14052 states and 53914 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 17:01:36,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:36,536 INFO L93 Difference]: Finished difference Result 19306 states and 72104 transitions. [2021-06-05 17:01:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:01:36,537 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 17:01:36,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:36,580 INFO L225 Difference]: With dead ends: 19306 [2021-06-05 17:01:36,580 INFO L226 Difference]: Without dead ends: 19298 [2021-06-05 17:01:36,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 369.7ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:01:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19298 states. [2021-06-05 17:01:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19298 to 13972. [2021-06-05 17:01:36,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13972 states, 13971 states have (on average 3.8398110371483787) internal successors, (53646), 13971 states have internal predecessors, (53646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13972 states to 13972 states and 53646 transitions. [2021-06-05 17:01:36,890 INFO L78 Accepts]: Start accepts. Automaton has 13972 states and 53646 transitions. Word has length 28 [2021-06-05 17:01:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:36,890 INFO L482 AbstractCegarLoop]: Abstraction has 13972 states and 53646 transitions. [2021-06-05 17:01:36,890 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 17:01:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 13972 states and 53646 transitions. [2021-06-05 17:01:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:36,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:36,913 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 17:01:37,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:37,114 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:37,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:37,114 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 82 times [2021-06-05 17:01:37,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:37,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589673390] [2021-06-05 17:01:37,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:37,154 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 17:01:37,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:37,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589673390] [2021-06-05 17:01:37,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589673390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:37,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170276296] [2021-06-05 17:01:37,154 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 17:01:37,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:37,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:37,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:37,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:37,233 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 17:01:37,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170276296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:37,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:37,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:01:37,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888196322] [2021-06-05 17:01:37,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:37,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:37,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:37,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:37,233 INFO L87 Difference]: Start difference. First operand 13972 states and 53646 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 17:01:37,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:37,667 INFO L93 Difference]: Finished difference Result 19186 states and 71752 transitions. [2021-06-05 17:01:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:01:37,667 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 17:01:37,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:37,707 INFO L225 Difference]: With dead ends: 19186 [2021-06-05 17:01:37,707 INFO L226 Difference]: Without dead ends: 19174 [2021-06-05 17:01:37,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:01:37,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19174 states. [2021-06-05 17:01:37,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19174 to 13938. [2021-06-05 17:01:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13938 states, 13937 states have (on average 3.841788046207936) internal successors, (53543), 13937 states have internal predecessors, (53543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13938 states to 13938 states and 53543 transitions. [2021-06-05 17:01:38,031 INFO L78 Accepts]: Start accepts. Automaton has 13938 states and 53543 transitions. Word has length 28 [2021-06-05 17:01:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:38,031 INFO L482 AbstractCegarLoop]: Abstraction has 13938 states and 53543 transitions. [2021-06-05 17:01:38,031 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 17:01:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 13938 states and 53543 transitions. [2021-06-05 17:01:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:38,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:38,053 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 17:01:38,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 17:01:38,253 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:38,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:38,254 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 83 times [2021-06-05 17:01:38,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:38,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000602937] [2021-06-05 17:01:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:38,290 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 17:01:38,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:38,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000602937] [2021-06-05 17:01:38,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000602937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:38,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129262615] [2021-06-05 17:01:38,290 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 17:01:38,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:01:38,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:38,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:38,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:38,405 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 17:01:38,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129262615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:38,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:38,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:01:38,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640808173] [2021-06-05 17:01:38,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:01:38,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:38,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:01:38,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:01:38,406 INFO L87 Difference]: Start difference. First operand 13938 states and 53543 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 17:01:39,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:39,510 INFO L93 Difference]: Finished difference Result 26084 states and 94333 transitions. [2021-06-05 17:01:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:01:39,510 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 17:01:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:39,560 INFO L225 Difference]: With dead ends: 26084 [2021-06-05 17:01:39,560 INFO L226 Difference]: Without dead ends: 26084 [2021-06-05 17:01:39,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:01:39,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26084 states. [2021-06-05 17:01:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26084 to 13918. [2021-06-05 17:01:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13918 states, 13917 states have (on average 3.840698426384997) internal successors, (53451), 13917 states have internal predecessors, (53451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13918 states to 13918 states and 53451 transitions. [2021-06-05 17:01:39,897 INFO L78 Accepts]: Start accepts. Automaton has 13918 states and 53451 transitions. Word has length 28 [2021-06-05 17:01:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:39,897 INFO L482 AbstractCegarLoop]: Abstraction has 13918 states and 53451 transitions. [2021-06-05 17:01:39,897 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 17:01:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 13918 states and 53451 transitions. [2021-06-05 17:01:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:39,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:39,918 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 17:01:40,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 17:01:40,118 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:40,119 INFO L82 PathProgramCache]: Analyzing trace with hash 368022285, now seen corresponding path program 101 times [2021-06-05 17:01:40,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:40,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649153750] [2021-06-05 17:01:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:40,144 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 17:01:40,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:40,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649153750] [2021-06-05 17:01:40,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649153750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:40,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317896215] [2021-06-05 17:01:40,144 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 17:01:40,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:01:40,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:40,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:40,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:40,255 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 17:01:40,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317896215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:40,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:40,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:01:40,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950544393] [2021-06-05 17:01:40,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:40,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:40,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:40,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:40,256 INFO L87 Difference]: Start difference. First operand 13918 states and 53451 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 17:01:40,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:40,932 INFO L93 Difference]: Finished difference Result 21840 states and 79850 transitions. [2021-06-05 17:01:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:01:40,933 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 17:01:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:40,974 INFO L225 Difference]: With dead ends: 21840 [2021-06-05 17:01:40,974 INFO L226 Difference]: Without dead ends: 21827 [2021-06-05 17:01:40,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:01:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21827 states. [2021-06-05 17:01:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21827 to 15432. [2021-06-05 17:01:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15432 states, 15431 states have (on average 3.899293629706435) internal successors, (60170), 15431 states have internal predecessors, (60170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15432 states to 15432 states and 60170 transitions. [2021-06-05 17:01:41,326 INFO L78 Accepts]: Start accepts. Automaton has 15432 states and 60170 transitions. Word has length 28 [2021-06-05 17:01:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:41,326 INFO L482 AbstractCegarLoop]: Abstraction has 15432 states and 60170 transitions. [2021-06-05 17:01:41,326 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 17:01:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 15432 states and 60170 transitions. [2021-06-05 17:01:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:41,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:41,349 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 17:01:41,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 17:01:41,550 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:41,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:41,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1040435067, now seen corresponding path program 102 times [2021-06-05 17:01:41,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:41,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034818898] [2021-06-05 17:01:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:41,579 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 17:01:41,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:41,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034818898] [2021-06-05 17:01:41,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034818898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:41,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648811234] [2021-06-05 17:01:41,579 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 17:01:41,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:01:41,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:41,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:41,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:41,686 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 17:01:41,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648811234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:41,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:41,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:01:41,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166292897] [2021-06-05 17:01:41,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:41,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:41,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:41,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:41,687 INFO L87 Difference]: Start difference. First operand 15432 states and 60170 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 17:01:42,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:42,521 INFO L93 Difference]: Finished difference Result 22001 states and 80297 transitions. [2021-06-05 17:01:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:01:42,521 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 17:01:42,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:42,564 INFO L225 Difference]: With dead ends: 22001 [2021-06-05 17:01:42,564 INFO L226 Difference]: Without dead ends: 21986 [2021-06-05 17:01:42,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:01:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21986 states. [2021-06-05 17:01:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21986 to 15399. [2021-06-05 17:01:42,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15399 states, 15398 states have (on average 3.89829848032212) internal successors, (60026), 15398 states have internal predecessors, (60026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15399 states to 15399 states and 60026 transitions. [2021-06-05 17:01:42,975 INFO L78 Accepts]: Start accepts. Automaton has 15399 states and 60026 transitions. Word has length 28 [2021-06-05 17:01:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:42,976 INFO L482 AbstractCegarLoop]: Abstraction has 15399 states and 60026 transitions. [2021-06-05 17:01:42,976 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 17:01:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 15399 states and 60026 transitions. [2021-06-05 17:01:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:42,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:42,998 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 17:01:43,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:43,198 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:43,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:43,199 INFO L82 PathProgramCache]: Analyzing trace with hash -774903755, now seen corresponding path program 103 times [2021-06-05 17:01:43,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:43,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896309121] [2021-06-05 17:01:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:43,226 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 17:01:43,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:43,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896309121] [2021-06-05 17:01:43,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896309121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:43,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204418892] [2021-06-05 17:01:43,226 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 17:01:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:43,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:43,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:43,332 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 17:01:43,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204418892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:43,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:43,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:01:43,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729057110] [2021-06-05 17:01:43,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:43,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:43,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:43,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:43,333 INFO L87 Difference]: Start difference. First operand 15399 states and 60026 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 17:01:43,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:43,975 INFO L93 Difference]: Finished difference Result 25011 states and 91344 transitions. [2021-06-05 17:01:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:01:43,976 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 17:01:43,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:44,027 INFO L225 Difference]: With dead ends: 25011 [2021-06-05 17:01:44,028 INFO L226 Difference]: Without dead ends: 24998 [2021-06-05 17:01:44,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 320.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:01:44,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24998 states. [2021-06-05 17:01:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24998 to 15493. [2021-06-05 17:01:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15493 states, 15492 states have (on average 3.904014975471211) internal successors, (60481), 15492 states have internal predecessors, (60481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15493 states to 15493 states and 60481 transitions. [2021-06-05 17:01:44,407 INFO L78 Accepts]: Start accepts. Automaton has 15493 states and 60481 transitions. Word has length 28 [2021-06-05 17:01:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:44,407 INFO L482 AbstractCegarLoop]: Abstraction has 15493 states and 60481 transitions. [2021-06-05 17:01:44,407 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 17:01:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 15493 states and 60481 transitions. [2021-06-05 17:01:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:44,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:44,430 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 17:01:44,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:44,631 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:44,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:44,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 104 times [2021-06-05 17:01:44,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:44,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806963493] [2021-06-05 17:01:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:44,657 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 17:01:44,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:44,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806963493] [2021-06-05 17:01:44,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806963493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:44,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326939559] [2021-06-05 17:01:44,658 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 17:01:44,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:44,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:44,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:44,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:44,756 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 17:01:44,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326939559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:44,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:44,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:01:44,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553495737] [2021-06-05 17:01:44,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:44,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:44,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:44,757 INFO L87 Difference]: Start difference. First operand 15493 states and 60481 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 17:01:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:45,440 INFO L93 Difference]: Finished difference Result 26795 states and 97004 transitions. [2021-06-05 17:01:45,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:01:45,441 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 17:01:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:45,498 INFO L225 Difference]: With dead ends: 26795 [2021-06-05 17:01:45,498 INFO L226 Difference]: Without dead ends: 26795 [2021-06-05 17:01:45,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:01:45,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26795 states. [2021-06-05 17:01:45,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26795 to 15546. [2021-06-05 17:01:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15546 states, 15545 states have (on average 3.900482470247668) internal successors, (60633), 15545 states have internal predecessors, (60633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15546 states to 15546 states and 60633 transitions. [2021-06-05 17:01:45,976 INFO L78 Accepts]: Start accepts. Automaton has 15546 states and 60633 transitions. Word has length 28 [2021-06-05 17:01:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:45,976 INFO L482 AbstractCegarLoop]: Abstraction has 15546 states and 60633 transitions. [2021-06-05 17:01:45,977 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 17:01:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 15546 states and 60633 transitions. [2021-06-05 17:01:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:46,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:46,000 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 17:01:46,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:46,200 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:46,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 84 times [2021-06-05 17:01:46,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:46,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886225022] [2021-06-05 17:01:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:46,232 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 17:01:46,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:46,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886225022] [2021-06-05 17:01:46,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886225022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:46,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606162502] [2021-06-05 17:01:46,232 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 17:01:46,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 17:01:46,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:46,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:46,326 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 17:01:46,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606162502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:46,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:46,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:01:46,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051803995] [2021-06-05 17:01:46,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:46,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:46,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:46,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:46,327 INFO L87 Difference]: Start difference. First operand 15546 states and 60633 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 17:01:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:47,248 INFO L93 Difference]: Finished difference Result 26187 states and 97576 transitions. [2021-06-05 17:01:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 17:01:47,249 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 17:01:47,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:47,307 INFO L225 Difference]: With dead ends: 26187 [2021-06-05 17:01:47,307 INFO L226 Difference]: Without dead ends: 26183 [2021-06-05 17:01:47,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 504.6ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:01:47,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26183 states. [2021-06-05 17:01:47,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26183 to 15842. [2021-06-05 17:01:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15842 states, 15841 states have (on average 3.8898428129537277) internal successors, (61619), 15841 states have internal predecessors, (61619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15842 states to 15842 states and 61619 transitions. [2021-06-05 17:01:47,709 INFO L78 Accepts]: Start accepts. Automaton has 15842 states and 61619 transitions. Word has length 28 [2021-06-05 17:01:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:47,709 INFO L482 AbstractCegarLoop]: Abstraction has 15842 states and 61619 transitions. [2021-06-05 17:01:47,709 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 17:01:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand 15842 states and 61619 transitions. [2021-06-05 17:01:47,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:47,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:47,733 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 17:01:47,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:47,934 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:47,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:47,934 INFO L82 PathProgramCache]: Analyzing trace with hash -516108431, now seen corresponding path program 105 times [2021-06-05 17:01:47,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:47,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435213202] [2021-06-05 17:01:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:47,965 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 17:01:47,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:47,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435213202] [2021-06-05 17:01:47,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435213202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:47,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229084884] [2021-06-05 17:01:47,965 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 17:01:47,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:01:47,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:47,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:47,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:48,054 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 17:01:48,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229084884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:48,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:48,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:01:48,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473474864] [2021-06-05 17:01:48,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:48,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:48,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:48,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:48,055 INFO L87 Difference]: Start difference. First operand 15842 states and 61619 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 17:01:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:48,689 INFO L93 Difference]: Finished difference Result 23185 states and 86238 transitions. [2021-06-05 17:01:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:01:48,689 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 17:01:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:48,736 INFO L225 Difference]: With dead ends: 23185 [2021-06-05 17:01:48,736 INFO L226 Difference]: Without dead ends: 23162 [2021-06-05 17:01:48,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:01:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23162 states. [2021-06-05 17:01:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23162 to 15987. [2021-06-05 17:01:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15987 states, 15986 states have (on average 3.90191417490304) internal successors, (62376), 15986 states have internal predecessors, (62376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15987 states to 15987 states and 62376 transitions. [2021-06-05 17:01:49,096 INFO L78 Accepts]: Start accepts. Automaton has 15987 states and 62376 transitions. Word has length 28 [2021-06-05 17:01:49,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:49,096 INFO L482 AbstractCegarLoop]: Abstraction has 15987 states and 62376 transitions. [2021-06-05 17:01:49,096 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 17:01:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 15987 states and 62376 transitions. [2021-06-05 17:01:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:49,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:49,231 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 17:01:49,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 17:01:49,431 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:49,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:49,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 106 times [2021-06-05 17:01:49,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:49,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190156579] [2021-06-05 17:01:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:49,461 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 17:01:49,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:49,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190156579] [2021-06-05 17:01:49,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190156579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:49,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206270505] [2021-06-05 17:01:49,462 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 17:01:49,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:01:49,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:49,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:49,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:49,556 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 17:01:49,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206270505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:49,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:49,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:01:49,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659744434] [2021-06-05 17:01:49,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:49,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:49,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:49,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:49,557 INFO L87 Difference]: Start difference. First operand 15987 states and 62376 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 17:01:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:50,252 INFO L93 Difference]: Finished difference Result 22747 states and 83421 transitions. [2021-06-05 17:01:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:01:50,252 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 28 [2021-06-05 17:01:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:50,297 INFO L225 Difference]: With dead ends: 22747 [2021-06-05 17:01:50,297 INFO L226 Difference]: Without dead ends: 22747 [2021-06-05 17:01:50,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:01:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22747 states. [2021-06-05 17:01:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22747 to 16102. [2021-06-05 17:01:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16102 states, 16101 states have (on average 3.8941059561517917) internal successors, (62699), 16101 states have internal predecessors, (62699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16102 states to 16102 states and 62699 transitions. [2021-06-05 17:01:50,635 INFO L78 Accepts]: Start accepts. Automaton has 16102 states and 62699 transitions. Word has length 28 [2021-06-05 17:01:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:50,636 INFO L482 AbstractCegarLoop]: Abstraction has 16102 states and 62699 transitions. [2021-06-05 17:01:50,636 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 17:01:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 16102 states and 62699 transitions. [2021-06-05 17:01:50,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:50,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:50,658 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 17:01:50,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 17:01:50,858 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:50,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:50,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1518971225, now seen corresponding path program 107 times [2021-06-05 17:01:50,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:50,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964738467] [2021-06-05 17:01:50,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:50,890 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 17:01:50,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:50,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964738467] [2021-06-05 17:01:50,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964738467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:50,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967488296] [2021-06-05 17:01:50,891 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 17:01:50,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:01:50,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:50,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:50,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:50,984 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 17:01:50,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967488296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:50,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:50,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:01:50,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615773055] [2021-06-05 17:01:50,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:01:50,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:50,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:01:50,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:01:50,985 INFO L87 Difference]: Start difference. First operand 16102 states and 62699 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 17:01:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:51,643 INFO L93 Difference]: Finished difference Result 25248 states and 92992 transitions. [2021-06-05 17:01:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:01:51,644 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 17:01:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:51,697 INFO L225 Difference]: With dead ends: 25248 [2021-06-05 17:01:51,698 INFO L226 Difference]: Without dead ends: 25248 [2021-06-05 17:01:51,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 349.3ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:01:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25248 states. [2021-06-05 17:01:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25248 to 17267. [2021-06-05 17:01:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17267 states, 17266 states have (on average 3.875709486852774) internal successors, (66918), 17266 states have internal predecessors, (66918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17267 states to 17267 states and 66918 transitions. [2021-06-05 17:01:52,068 INFO L78 Accepts]: Start accepts. Automaton has 17267 states and 66918 transitions. Word has length 28 [2021-06-05 17:01:52,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:52,068 INFO L482 AbstractCegarLoop]: Abstraction has 17267 states and 66918 transitions. [2021-06-05 17:01:52,069 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 17:01:52,069 INFO L276 IsEmpty]: Start isEmpty. Operand 17267 states and 66918 transitions. [2021-06-05 17:01:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:52,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:52,093 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 17:01:52,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 17:01:52,293 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:52,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:52,294 INFO L82 PathProgramCache]: Analyzing trace with hash -629568261, now seen corresponding path program 108 times [2021-06-05 17:01:52,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:52,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084263414] [2021-06-05 17:01:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:52,323 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 17:01:52,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:52,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084263414] [2021-06-05 17:01:52,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084263414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:52,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205196877] [2021-06-05 17:01:52,324 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 17:01:52,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:01:52,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:52,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:52,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:52,423 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 17:01:52,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205196877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:52,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:52,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:01:52,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517695887] [2021-06-05 17:01:52,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:01:52,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:52,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:01:52,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:01:52,423 INFO L87 Difference]: Start difference. First operand 17267 states and 66918 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 17:01:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:53,304 INFO L93 Difference]: Finished difference Result 28557 states and 103702 transitions. [2021-06-05 17:01:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:01:53,305 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 17:01:53,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:53,367 INFO L225 Difference]: With dead ends: 28557 [2021-06-05 17:01:53,367 INFO L226 Difference]: Without dead ends: 28557 [2021-06-05 17:01:53,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:01:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28557 states. [2021-06-05 17:01:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28557 to 17513. [2021-06-05 17:01:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17513 states, 17512 states have (on average 3.8901324805847417) internal successors, (68124), 17512 states have internal predecessors, (68124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17513 states to 17513 states and 68124 transitions. [2021-06-05 17:01:53,759 INFO L78 Accepts]: Start accepts. Automaton has 17513 states and 68124 transitions. Word has length 28 [2021-06-05 17:01:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:53,759 INFO L482 AbstractCegarLoop]: Abstraction has 17513 states and 68124 transitions. [2021-06-05 17:01:53,759 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 17:01:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 17513 states and 68124 transitions. [2021-06-05 17:01:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:53,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:53,784 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 17:01:53,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-05 17:01:53,984 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:53,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 85 times [2021-06-05 17:01:53,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:53,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702914391] [2021-06-05 17:01:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:54,018 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 17:01:54,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:54,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702914391] [2021-06-05 17:01:54,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702914391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:54,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549127045] [2021-06-05 17:01:54,018 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 17:01:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:54,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:54,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:54,138 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 17:01:54,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549127045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:54,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:54,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:01:54,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346432568] [2021-06-05 17:01:54,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:54,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:54,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:54,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:54,139 INFO L87 Difference]: Start difference. First operand 17513 states and 68124 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 17:01:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:55,574 INFO L93 Difference]: Finished difference Result 45668 states and 165537 transitions. [2021-06-05 17:01:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:01:55,574 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 17:01:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:55,669 INFO L225 Difference]: With dead ends: 45668 [2021-06-05 17:01:55,670 INFO L226 Difference]: Without dead ends: 45668 [2021-06-05 17:01:55,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 863.8ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:01:55,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45668 states. [2021-06-05 17:01:56,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45668 to 18875. [2021-06-05 17:01:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18875 states, 18874 states have (on average 3.927943202288863) internal successors, (74136), 18874 states have internal predecessors, (74136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18875 states to 18875 states and 74136 transitions. [2021-06-05 17:01:56,584 INFO L78 Accepts]: Start accepts. Automaton has 18875 states and 74136 transitions. Word has length 28 [2021-06-05 17:01:56,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:56,584 INFO L482 AbstractCegarLoop]: Abstraction has 18875 states and 74136 transitions. [2021-06-05 17:01:56,584 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 17:01:56,584 INFO L276 IsEmpty]: Start isEmpty. Operand 18875 states and 74136 transitions. [2021-06-05 17:01:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:56,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:56,614 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 17:01:56,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:01:56,814 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:56,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:56,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 86 times [2021-06-05 17:01:56,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:56,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917545540] [2021-06-05 17:01:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:56,849 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 17:01:56,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:56,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917545540] [2021-06-05 17:01:56,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917545540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:56,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057751294] [2021-06-05 17:01:56,850 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 17:01:56,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:01:56,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:01:56,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:01:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:01:56,972 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 17:01:56,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057751294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:56,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:01:56,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:01:56,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581202530] [2021-06-05 17:01:56,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:01:56,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:01:56,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:01:56,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:01:56,973 INFO L87 Difference]: Start difference. First operand 18875 states and 74136 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 17:01:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:01:58,615 INFO L93 Difference]: Finished difference Result 44591 states and 162736 transitions. [2021-06-05 17:01:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:01:58,616 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 17:01:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:01:58,740 INFO L225 Difference]: With dead ends: 44591 [2021-06-05 17:01:58,740 INFO L226 Difference]: Without dead ends: 44591 [2021-06-05 17:01:58,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 997.1ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:01:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44591 states. [2021-06-05 17:01:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44591 to 18843. [2021-06-05 17:01:59,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18843 states, 18842 states have (on average 3.924848742171744) internal successors, (73952), 18842 states have internal predecessors, (73952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:01:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18843 states to 18843 states and 73952 transitions. [2021-06-05 17:01:59,572 INFO L78 Accepts]: Start accepts. Automaton has 18843 states and 73952 transitions. Word has length 28 [2021-06-05 17:01:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:01:59,573 INFO L482 AbstractCegarLoop]: Abstraction has 18843 states and 73952 transitions. [2021-06-05 17:01:59,573 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 17:01:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 18843 states and 73952 transitions. [2021-06-05 17:01:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:01:59,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:01:59,601 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 17:01:59,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 17:01:59,802 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:01:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:01:59,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 109 times [2021-06-05 17:01:59,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:01:59,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100431509] [2021-06-05 17:01:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:01:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:59,927 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-06-05 17:01:59,976 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 17:01:59,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:01:59,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100431509] [2021-06-05 17:01:59,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100431509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:01:59,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787880654] [2021-06-05 17:01:59,976 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 17:01:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:01:59,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:01:59,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:00,051 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 17:02:00,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787880654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:00,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:00,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:02:00,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74646949] [2021-06-05 17:02:00,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:00,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:00,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:00,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:00,052 INFO L87 Difference]: Start difference. First operand 18843 states and 73952 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 17:02:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:00,417 INFO L93 Difference]: Finished difference Result 30303 states and 117561 transitions. [2021-06-05 17:02:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:02:00,417 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 17:02:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:00,494 INFO L225 Difference]: With dead ends: 30303 [2021-06-05 17:02:00,494 INFO L226 Difference]: Without dead ends: 30256 [2021-06-05 17:02:00,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:02:00,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30256 states. [2021-06-05 17:02:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30256 to 24046. [2021-06-05 17:02:01,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24046 states, 24045 states have (on average 3.9271782075275525) internal successors, (94429), 24045 states have internal predecessors, (94429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:01,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24046 states to 24046 states and 94429 transitions. [2021-06-05 17:02:01,101 INFO L78 Accepts]: Start accepts. Automaton has 24046 states and 94429 transitions. Word has length 28 [2021-06-05 17:02:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:01,101 INFO L482 AbstractCegarLoop]: Abstraction has 24046 states and 94429 transitions. [2021-06-05 17:02:01,101 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 17:02:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 24046 states and 94429 transitions. [2021-06-05 17:02:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:01,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:01,133 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 17:02:01,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 17:02:01,334 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:01,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:01,334 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 110 times [2021-06-05 17:02:01,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:01,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163410155] [2021-06-05 17:02:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:01,362 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 17:02:01,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:01,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163410155] [2021-06-05 17:02:01,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163410155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:01,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072628288] [2021-06-05 17:02:01,362 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 17:02:01,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:01,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:01,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:02:01,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:01,547 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 17:02:01,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072628288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:01,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:01,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:02:01,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983259772] [2021-06-05 17:02:01,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:01,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:01,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:01,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:01,548 INFO L87 Difference]: Start difference. First operand 24046 states and 94429 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 17:02:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:01,821 INFO L93 Difference]: Finished difference Result 26794 states and 102777 transitions. [2021-06-05 17:02:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:02:01,822 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 17:02:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:01,881 INFO L225 Difference]: With dead ends: 26794 [2021-06-05 17:02:01,881 INFO L226 Difference]: Without dead ends: 26794 [2021-06-05 17:02:01,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:02:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26794 states. [2021-06-05 17:02:02,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26794 to 23549. [2021-06-05 17:02:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23549 states, 23548 states have (on average 3.9178274163410904) internal successors, (92257), 23548 states have internal predecessors, (92257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23549 states to 23549 states and 92257 transitions. [2021-06-05 17:02:02,536 INFO L78 Accepts]: Start accepts. Automaton has 23549 states and 92257 transitions. Word has length 28 [2021-06-05 17:02:02,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:02,536 INFO L482 AbstractCegarLoop]: Abstraction has 23549 states and 92257 transitions. [2021-06-05 17:02:02,536 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 17:02:02,536 INFO L276 IsEmpty]: Start isEmpty. Operand 23549 states and 92257 transitions. [2021-06-05 17:02:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:02,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:02,569 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 17:02:02,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 17:02:02,769 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:02,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:02,769 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 111 times [2021-06-05 17:02:02,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:02,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894221419] [2021-06-05 17:02:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:02,805 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 17:02:02,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:02,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894221419] [2021-06-05 17:02:02,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894221419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:02,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706375346] [2021-06-05 17:02:02,805 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 17:02:02,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:02:02,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:02,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:02,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:02,926 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 17:02:02,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706375346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:02,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:02,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 17:02:02,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698683529] [2021-06-05 17:02:02,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:02:02,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:02,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:02:02,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:02:02,928 INFO L87 Difference]: Start difference. First operand 23549 states and 92257 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 17:02:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:03,943 INFO L93 Difference]: Finished difference Result 36148 states and 135030 transitions. [2021-06-05 17:02:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:02:03,943 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 17:02:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:04,024 INFO L225 Difference]: With dead ends: 36148 [2021-06-05 17:02:04,025 INFO L226 Difference]: Without dead ends: 36148 [2021-06-05 17:02:04,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 484.5ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:02:04,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36148 states. [2021-06-05 17:02:04,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36148 to 23617. [2021-06-05 17:02:04,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23617 states, 23616 states have (on average 3.915989159891599) internal successors, (92480), 23616 states have internal predecessors, (92480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23617 states to 23617 states and 92480 transitions. [2021-06-05 17:02:04,821 INFO L78 Accepts]: Start accepts. Automaton has 23617 states and 92480 transitions. Word has length 28 [2021-06-05 17:02:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:04,821 INFO L482 AbstractCegarLoop]: Abstraction has 23617 states and 92480 transitions. [2021-06-05 17:02:04,821 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 17:02:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 23617 states and 92480 transitions. [2021-06-05 17:02:04,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:04,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:04,864 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 17:02:05,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:05,087 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:05,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 112 times [2021-06-05 17:02:05,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:05,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850855645] [2021-06-05 17:02:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:05,138 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 17:02:05,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:05,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850855645] [2021-06-05 17:02:05,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850855645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:05,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570939564] [2021-06-05 17:02:05,138 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 17:02:05,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:05,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:05,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:05,275 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 17:02:05,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570939564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:05,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:05,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:02:05,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010353513] [2021-06-05 17:02:05,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:02:05,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:05,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:02:05,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:02:05,276 INFO L87 Difference]: Start difference. First operand 23617 states and 92480 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 17:02:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:06,882 INFO L93 Difference]: Finished difference Result 46617 states and 172038 transitions. [2021-06-05 17:02:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:02:06,882 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 17:02:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:07,140 INFO L225 Difference]: With dead ends: 46617 [2021-06-05 17:02:07,140 INFO L226 Difference]: Without dead ends: 46617 [2021-06-05 17:02:07,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 885.0ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 17:02:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46617 states. [2021-06-05 17:02:07,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46617 to 23616. [2021-06-05 17:02:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23616 states, 23615 states have (on average 3.9178488248994285) internal successors, (92520), 23615 states have internal predecessors, (92520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23616 states to 23616 states and 92520 transitions. [2021-06-05 17:02:07,844 INFO L78 Accepts]: Start accepts. Automaton has 23616 states and 92520 transitions. Word has length 28 [2021-06-05 17:02:07,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:07,844 INFO L482 AbstractCegarLoop]: Abstraction has 23616 states and 92520 transitions. [2021-06-05 17:02:07,844 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 17:02:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 23616 states and 92520 transitions. [2021-06-05 17:02:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:07,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:07,878 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 17:02:08,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:08,078 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:08,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:08,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 113 times [2021-06-05 17:02:08,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:08,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681258917] [2021-06-05 17:02:08,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:08,114 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 17:02:08,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:08,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681258917] [2021-06-05 17:02:08,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681258917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:08,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719654513] [2021-06-05 17:02:08,115 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 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 17:02:08,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:02:08,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:08,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:08,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:08,230 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 17:02:08,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719654513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:08,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:08,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:02:08,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443751388] [2021-06-05 17:02:08,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:02:08,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:08,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:02:08,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:02:08,231 INFO L87 Difference]: Start difference. First operand 23616 states and 92520 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 17:02:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:09,798 INFO L93 Difference]: Finished difference Result 46345 states and 171695 transitions. [2021-06-05 17:02:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:02:09,798 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 17:02:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:10,073 INFO L225 Difference]: With dead ends: 46345 [2021-06-05 17:02:10,073 INFO L226 Difference]: Without dead ends: 46345 [2021-06-05 17:02:10,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 880.3ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 17:02:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46345 states. [2021-06-05 17:02:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46345 to 23400. [2021-06-05 17:02:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23400 states, 23399 states have (on average 3.9111927860164966) internal successors, (91518), 23399 states have internal predecessors, (91518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23400 states to 23400 states and 91518 transitions. [2021-06-05 17:02:10,740 INFO L78 Accepts]: Start accepts. Automaton has 23400 states and 91518 transitions. Word has length 28 [2021-06-05 17:02:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:10,740 INFO L482 AbstractCegarLoop]: Abstraction has 23400 states and 91518 transitions. [2021-06-05 17:02:10,740 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 17:02:10,741 INFO L276 IsEmpty]: Start isEmpty. Operand 23400 states and 91518 transitions. [2021-06-05 17:02:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:10,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:10,775 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 17:02:10,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 17:02:10,975 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:10,976 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 114 times [2021-06-05 17:02:10,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:10,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678529914] [2021-06-05 17:02:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:11,003 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 17:02:11,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678529914] [2021-06-05 17:02:11,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678529914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583449271] [2021-06-05 17:02:11,003 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 17:02:11,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:02:11,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:11,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:11,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:11,080 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 17:02:11,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583449271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:11,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:11,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 17:02:11,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147117281] [2021-06-05 17:02:11,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:11,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:11,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:11,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:11,081 INFO L87 Difference]: Start difference. First operand 23400 states and 91518 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 17:02:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:11,366 INFO L93 Difference]: Finished difference Result 35770 states and 134580 transitions. [2021-06-05 17:02:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:02:11,367 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 17:02:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:11,630 INFO L225 Difference]: With dead ends: 35770 [2021-06-05 17:02:11,630 INFO L226 Difference]: Without dead ends: 35753 [2021-06-05 17:02:11,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:02:11,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35753 states. [2021-06-05 17:02:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35753 to 23671. [2021-06-05 17:02:12,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23671 states, 23670 states have (on average 3.9156738487536966) internal successors, (92684), 23670 states have internal predecessors, (92684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23671 states to 23671 states and 92684 transitions. [2021-06-05 17:02:12,388 INFO L78 Accepts]: Start accepts. Automaton has 23671 states and 92684 transitions. Word has length 28 [2021-06-05 17:02:12,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:12,388 INFO L482 AbstractCegarLoop]: Abstraction has 23671 states and 92684 transitions. [2021-06-05 17:02:12,388 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 17:02:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 23671 states and 92684 transitions. [2021-06-05 17:02:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:12,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:12,426 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 17:02:12,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 17:02:12,626 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:12,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 115 times [2021-06-05 17:02:12,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:12,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374085729] [2021-06-05 17:02:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:12,656 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 17:02:12,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:12,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374085729] [2021-06-05 17:02:12,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374085729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:12,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816162373] [2021-06-05 17:02:12,656 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 17:02:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:12,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:12,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:12,743 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 17:02:12,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816162373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:12,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:12,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 17:02:12,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257072307] [2021-06-05 17:02:12,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:12,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:12,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:12,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:12,744 INFO L87 Difference]: Start difference. First operand 23671 states and 92684 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 17:02:13,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:13,070 INFO L93 Difference]: Finished difference Result 37952 states and 141497 transitions. [2021-06-05 17:02:13,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:02:13,071 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 17:02:13,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:13,162 INFO L225 Difference]: With dead ends: 37952 [2021-06-05 17:02:13,162 INFO L226 Difference]: Without dead ends: 37952 [2021-06-05 17:02:13,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:02:13,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37952 states. [2021-06-05 17:02:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37952 to 23340. [2021-06-05 17:02:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23340 states, 23339 states have (on average 3.903252067355071) internal successors, (91098), 23339 states have internal predecessors, (91098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23340 states to 23340 states and 91098 transitions. [2021-06-05 17:02:13,880 INFO L78 Accepts]: Start accepts. Automaton has 23340 states and 91098 transitions. Word has length 28 [2021-06-05 17:02:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:13,880 INFO L482 AbstractCegarLoop]: Abstraction has 23340 states and 91098 transitions. [2021-06-05 17:02:13,880 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 17:02:13,881 INFO L276 IsEmpty]: Start isEmpty. Operand 23340 states and 91098 transitions. [2021-06-05 17:02:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:13,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:13,911 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 17:02:14,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 17:02:14,112 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 116 times [2021-06-05 17:02:14,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:14,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117183364] [2021-06-05 17:02:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:14,202 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 17:02:14,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:14,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117183364] [2021-06-05 17:02:14,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117183364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:14,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096308598] [2021-06-05 17:02:14,202 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 17:02:14,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:14,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:14,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:14,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:14,307 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 17:02:14,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096308598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:14,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:14,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:02:14,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750135739] [2021-06-05 17:02:14,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:02:14,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:14,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:02:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:02:14,308 INFO L87 Difference]: Start difference. First operand 23340 states and 91098 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 17:02:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:15,242 INFO L93 Difference]: Finished difference Result 33275 states and 124927 transitions. [2021-06-05 17:02:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 17:02:15,243 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 17:02:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:15,325 INFO L225 Difference]: With dead ends: 33275 [2021-06-05 17:02:15,325 INFO L226 Difference]: Without dead ends: 33275 [2021-06-05 17:02:15,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 560.7ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:02:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33275 states. [2021-06-05 17:02:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33275 to 23388. [2021-06-05 17:02:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23388 states, 23387 states have (on average 3.9018258006584854) internal successors, (91252), 23387 states have internal predecessors, (91252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23388 states to 23388 states and 91252 transitions. [2021-06-05 17:02:16,006 INFO L78 Accepts]: Start accepts. Automaton has 23388 states and 91252 transitions. Word has length 28 [2021-06-05 17:02:16,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:16,006 INFO L482 AbstractCegarLoop]: Abstraction has 23388 states and 91252 transitions. [2021-06-05 17:02:16,006 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 17:02:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 23388 states and 91252 transitions. [2021-06-05 17:02:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:16,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:16,041 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 17:02:16,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 17:02:16,241 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:16,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 117 times [2021-06-05 17:02:16,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:16,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167485108] [2021-06-05 17:02:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:16,276 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 17:02:16,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:16,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167485108] [2021-06-05 17:02:16,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167485108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:16,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018509236] [2021-06-05 17:02:16,277 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 17:02:16,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:02:16,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:16,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:16,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:16,373 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 17:02:16,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018509236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:16,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:16,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:02:16,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184491357] [2021-06-05 17:02:16,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:02:16,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:16,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:02:16,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:02:16,374 INFO L87 Difference]: Start difference. First operand 23388 states and 91252 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 17:02:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:17,502 INFO L93 Difference]: Finished difference Result 34959 states and 129812 transitions. [2021-06-05 17:02:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 17:02:17,502 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 17:02:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:17,598 INFO L225 Difference]: With dead ends: 34959 [2021-06-05 17:02:17,599 INFO L226 Difference]: Without dead ends: 34959 [2021-06-05 17:02:17,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 544.9ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:02:17,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34959 states. [2021-06-05 17:02:18,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34959 to 23950. [2021-06-05 17:02:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23950 states, 23949 states have (on average 3.882625579356132) internal successors, (92985), 23949 states have internal predecessors, (92985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:18,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23950 states to 23950 states and 92985 transitions. [2021-06-05 17:02:18,509 INFO L78 Accepts]: Start accepts. Automaton has 23950 states and 92985 transitions. Word has length 28 [2021-06-05 17:02:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:18,509 INFO L482 AbstractCegarLoop]: Abstraction has 23950 states and 92985 transitions. [2021-06-05 17:02:18,509 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 17:02:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 23950 states and 92985 transitions. [2021-06-05 17:02:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:18,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:18,546 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 17:02:18,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 17:02:18,747 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:18,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:18,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 118 times [2021-06-05 17:02:18,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:18,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560419679] [2021-06-05 17:02:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:18,808 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 17:02:18,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:18,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560419679] [2021-06-05 17:02:18,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560419679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:18,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256484749] [2021-06-05 17:02:18,809 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 17:02:18,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:18,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:18,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:18,921 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 17:02:18,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256484749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:18,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:18,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:02:18,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64893925] [2021-06-05 17:02:18,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:02:18,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:18,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:02:18,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:02:18,922 INFO L87 Difference]: Start difference. First operand 23950 states and 92985 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 17:02:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:19,790 INFO L93 Difference]: Finished difference Result 34019 states and 127355 transitions. [2021-06-05 17:02:19,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:02:19,791 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 17:02:19,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:20,088 INFO L225 Difference]: With dead ends: 34019 [2021-06-05 17:02:20,088 INFO L226 Difference]: Without dead ends: 34015 [2021-06-05 17:02:20,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:02:20,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34015 states. [2021-06-05 17:02:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34015 to 23842. [2021-06-05 17:02:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23842 states, 23841 states have (on average 3.885113879451365) internal successors, (92625), 23841 states have internal predecessors, (92625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23842 states to 23842 states and 92625 transitions. [2021-06-05 17:02:20,651 INFO L78 Accepts]: Start accepts. Automaton has 23842 states and 92625 transitions. Word has length 28 [2021-06-05 17:02:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:20,652 INFO L482 AbstractCegarLoop]: Abstraction has 23842 states and 92625 transitions. [2021-06-05 17:02:20,652 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 17:02:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 23842 states and 92625 transitions. [2021-06-05 17:02:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:20,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:20,876 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 17:02:21,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:21,079 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:21,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1066349071, now seen corresponding path program 119 times [2021-06-05 17:02:21,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:21,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056639058] [2021-06-05 17:02:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:21,107 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 17:02:21,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:21,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056639058] [2021-06-05 17:02:21,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056639058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:21,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891109567] [2021-06-05 17:02:21,107 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 17:02:21,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:02:21,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:21,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:21,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:21,195 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 17:02:21,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891109567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:21,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:21,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 17:02:21,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893980217] [2021-06-05 17:02:21,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:02:21,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:21,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:02:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:02:21,196 INFO L87 Difference]: Start difference. First operand 23842 states and 92625 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 17:02:21,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:21,433 INFO L93 Difference]: Finished difference Result 30199 states and 113195 transitions. [2021-06-05 17:02:21,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:02:21,433 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 17:02:21,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:21,499 INFO L225 Difference]: With dead ends: 30199 [2021-06-05 17:02:21,499 INFO L226 Difference]: Without dead ends: 30199 [2021-06-05 17:02:21,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:02:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30199 states. [2021-06-05 17:02:22,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30199 to 24152. [2021-06-05 17:02:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24152 states, 24151 states have (on average 3.87718935033746) internal successors, (93638), 24151 states have internal predecessors, (93638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24152 states to 24152 states and 93638 transitions. [2021-06-05 17:02:22,156 INFO L78 Accepts]: Start accepts. Automaton has 24152 states and 93638 transitions. Word has length 28 [2021-06-05 17:02:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:22,156 INFO L482 AbstractCegarLoop]: Abstraction has 24152 states and 93638 transitions. [2021-06-05 17:02:22,156 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 17:02:22,156 INFO L276 IsEmpty]: Start isEmpty. Operand 24152 states and 93638 transitions. [2021-06-05 17:02:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:22,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:22,192 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 17:02:22,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 17:02:22,393 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:22,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:22,393 INFO L82 PathProgramCache]: Analyzing trace with hash -136149327, now seen corresponding path program 120 times [2021-06-05 17:02:22,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:22,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538174614] [2021-06-05 17:02:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:22,431 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 17:02:22,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:22,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538174614] [2021-06-05 17:02:22,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538174614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:22,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298663243] [2021-06-05 17:02:22,431 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 17:02:22,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:02:22,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:22,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:22,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:22,524 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 17:02:22,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298663243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:22,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:22,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:02:22,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764634261] [2021-06-05 17:02:22,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:22,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:22,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:22,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:22,525 INFO L87 Difference]: Start difference. First operand 24152 states and 93638 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 17:02:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:23,382 INFO L93 Difference]: Finished difference Result 35046 states and 129747 transitions. [2021-06-05 17:02:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:02:23,382 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 17:02:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:23,469 INFO L225 Difference]: With dead ends: 35046 [2021-06-05 17:02:23,469 INFO L226 Difference]: Without dead ends: 35046 [2021-06-05 17:02:23,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:02:23,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35046 states. [2021-06-05 17:02:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35046 to 25935. [2021-06-05 17:02:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25935 states, 25934 states have (on average 3.8859026760237527) internal successors, (100777), 25934 states have internal predecessors, (100777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25935 states to 25935 states and 100777 transitions. [2021-06-05 17:02:24,266 INFO L78 Accepts]: Start accepts. Automaton has 25935 states and 100777 transitions. Word has length 28 [2021-06-05 17:02:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:24,267 INFO L482 AbstractCegarLoop]: Abstraction has 25935 states and 100777 transitions. [2021-06-05 17:02:24,267 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 17:02:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 25935 states and 100777 transitions. [2021-06-05 17:02:24,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:24,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:24,302 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 17:02:24,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 17:02:24,503 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:24,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1975921655, now seen corresponding path program 121 times [2021-06-05 17:02:24,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:24,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759721695] [2021-06-05 17:02:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:24,538 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 17:02:24,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:24,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759721695] [2021-06-05 17:02:24,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759721695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:24,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530838863] [2021-06-05 17:02:24,538 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 17:02:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:24,617 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 17:02:24,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530838863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:24,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:24,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:02:24,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704365187] [2021-06-05 17:02:24,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:24,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:24,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:24,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:24,620 INFO L87 Difference]: Start difference. First operand 25935 states and 100777 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 17:02:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:25,445 INFO L93 Difference]: Finished difference Result 33305 states and 125259 transitions. [2021-06-05 17:02:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:02:25,446 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 17:02:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:25,522 INFO L225 Difference]: With dead ends: 33305 [2021-06-05 17:02:25,522 INFO L226 Difference]: Without dead ends: 33293 [2021-06-05 17:02:25,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 482.3ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:02:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33293 states. [2021-06-05 17:02:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33293 to 26101. [2021-06-05 17:02:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26101 states, 26100 states have (on average 3.880842911877395) internal successors, (101290), 26100 states have internal predecessors, (101290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26101 states to 26101 states and 101290 transitions. [2021-06-05 17:02:26,293 INFO L78 Accepts]: Start accepts. Automaton has 26101 states and 101290 transitions. Word has length 28 [2021-06-05 17:02:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:26,293 INFO L482 AbstractCegarLoop]: Abstraction has 26101 states and 101290 transitions. [2021-06-05 17:02:26,293 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 17:02:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 26101 states and 101290 transitions. [2021-06-05 17:02:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:26,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:26,330 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 17:02:26,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:26,531 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:26,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1688262325, now seen corresponding path program 122 times [2021-06-05 17:02:26,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:26,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060517174] [2021-06-05 17:02:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:26,558 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 17:02:26,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:26,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060517174] [2021-06-05 17:02:26,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060517174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:26,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345121802] [2021-06-05 17:02:26,559 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 17:02:26,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:26,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:26,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:26,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:26,633 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 17:02:26,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345121802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:26,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:26,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 17:02:26,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708503214] [2021-06-05 17:02:26,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:02:26,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:26,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:02:26,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:02:26,634 INFO L87 Difference]: Start difference. First operand 26101 states and 101290 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 17:02:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:26,894 INFO L93 Difference]: Finished difference Result 30661 states and 116866 transitions. [2021-06-05 17:02:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:02:26,894 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 17:02:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:26,965 INFO L225 Difference]: With dead ends: 30661 [2021-06-05 17:02:26,965 INFO L226 Difference]: Without dead ends: 30661 [2021-06-05 17:02:26,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:02:26,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30661 states. [2021-06-05 17:02:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30661 to 27307. [2021-06-05 17:02:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27307 states, 27306 states have (on average 3.8768402548890353) internal successors, (105861), 27306 states have internal predecessors, (105861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27307 states to 27307 states and 105861 transitions. [2021-06-05 17:02:27,693 INFO L78 Accepts]: Start accepts. Automaton has 27307 states and 105861 transitions. Word has length 28 [2021-06-05 17:02:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:27,693 INFO L482 AbstractCegarLoop]: Abstraction has 27307 states and 105861 transitions. [2021-06-05 17:02:27,693 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 17:02:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 27307 states and 105861 transitions. [2021-06-05 17:02:27,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:27,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:27,739 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 17:02:27,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:27,940 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:27,940 INFO L82 PathProgramCache]: Analyzing trace with hash 2131923893, now seen corresponding path program 123 times [2021-06-05 17:02:27,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:27,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169585773] [2021-06-05 17:02:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:27,979 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 17:02:27,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:27,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169585773] [2021-06-05 17:02:27,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169585773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:27,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347897672] [2021-06-05 17:02:27,980 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 17:02:28,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:02:28,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:28,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:28,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:28,074 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 17:02:28,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347897672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:28,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:28,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:02:28,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045848426] [2021-06-05 17:02:28,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:28,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:28,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:28,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:28,075 INFO L87 Difference]: Start difference. First operand 27307 states and 105861 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 17:02:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:28,898 INFO L93 Difference]: Finished difference Result 35422 states and 132065 transitions. [2021-06-05 17:02:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:02:28,898 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 17:02:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:28,978 INFO L225 Difference]: With dead ends: 35422 [2021-06-05 17:02:28,979 INFO L226 Difference]: Without dead ends: 35422 [2021-06-05 17:02:28,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 424.8ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:02:29,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35422 states. [2021-06-05 17:02:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35422 to 28503. [2021-06-05 17:02:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28503 states, 28502 states have (on average 3.847694898603607) internal successors, (109667), 28502 states have internal predecessors, (109667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28503 states to 28503 states and 109667 transitions. [2021-06-05 17:02:29,824 INFO L78 Accepts]: Start accepts. Automaton has 28503 states and 109667 transitions. Word has length 28 [2021-06-05 17:02:29,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:29,824 INFO L482 AbstractCegarLoop]: Abstraction has 28503 states and 109667 transitions. [2021-06-05 17:02:29,824 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 17:02:29,824 INFO L276 IsEmpty]: Start isEmpty. Operand 28503 states and 109667 transitions. [2021-06-05 17:02:29,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:29,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:29,869 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 17:02:30,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:30,069 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:30,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1422950451, now seen corresponding path program 124 times [2021-06-05 17:02:30,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:30,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784928865] [2021-06-05 17:02:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:30,108 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 17:02:30,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:30,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784928865] [2021-06-05 17:02:30,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784928865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:30,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028842651] [2021-06-05 17:02:30,108 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 17:02:30,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:30,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:30,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:30,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:30,187 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 17:02:30,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028842651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:30,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:30,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:02:30,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183824798] [2021-06-05 17:02:30,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:30,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:30,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:30,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:30,188 INFO L87 Difference]: Start difference. First operand 28503 states and 109667 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 17:02:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:30,919 INFO L93 Difference]: Finished difference Result 34544 states and 129722 transitions. [2021-06-05 17:02:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:02:30,919 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 17:02:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:30,999 INFO L225 Difference]: With dead ends: 34544 [2021-06-05 17:02:30,999 INFO L226 Difference]: Without dead ends: 34536 [2021-06-05 17:02:30,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:02:31,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34536 states. [2021-06-05 17:02:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34536 to 28309. [2021-06-05 17:02:31,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28309 states, 28308 states have (on average 3.853610286844708) internal successors, (109088), 28308 states have internal predecessors, (109088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 109088 transitions. [2021-06-05 17:02:31,783 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 109088 transitions. Word has length 28 [2021-06-05 17:02:31,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:31,783 INFO L482 AbstractCegarLoop]: Abstraction has 28309 states and 109088 transitions. [2021-06-05 17:02:31,783 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 17:02:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 109088 transitions. [2021-06-05 17:02:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:31,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:31,828 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 17:02:32,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:32,028 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:32,028 INFO L82 PathProgramCache]: Analyzing trace with hash 27046477, now seen corresponding path program 125 times [2021-06-05 17:02:32,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:32,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437917480] [2021-06-05 17:02:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:32,059 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 17:02:32,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:32,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437917480] [2021-06-05 17:02:32,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437917480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:32,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433204832] [2021-06-05 17:02:32,059 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 17:02:32,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:02:32,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:32,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:32,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:32,141 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 17:02:32,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433204832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:32,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:32,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:02:32,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211406290] [2021-06-05 17:02:32,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:32,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:32,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:32,142 INFO L87 Difference]: Start difference. First operand 28309 states and 109088 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 17:02:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:32,837 INFO L93 Difference]: Finished difference Result 36390 states and 135344 transitions. [2021-06-05 17:02:32,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:02:32,837 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 17:02:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:32,919 INFO L225 Difference]: With dead ends: 36390 [2021-06-05 17:02:32,919 INFO L226 Difference]: Without dead ends: 36390 [2021-06-05 17:02:32,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:02:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36390 states. [2021-06-05 17:02:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36390 to 29319. [2021-06-05 17:02:33,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29319 states, 29318 states have (on average 3.831741592195921) internal successors, (112339), 29318 states have internal predecessors, (112339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29319 states to 29319 states and 112339 transitions. [2021-06-05 17:02:33,850 INFO L78 Accepts]: Start accepts. Automaton has 29319 states and 112339 transitions. Word has length 28 [2021-06-05 17:02:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:33,850 INFO L482 AbstractCegarLoop]: Abstraction has 29319 states and 112339 transitions. [2021-06-05 17:02:33,850 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 17:02:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 29319 states and 112339 transitions. [2021-06-05 17:02:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:33,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:33,900 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 17:02:34,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-05 17:02:34,101 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1055976179, now seen corresponding path program 126 times [2021-06-05 17:02:34,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:34,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234719844] [2021-06-05 17:02:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:34,135 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 17:02:34,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:34,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234719844] [2021-06-05 17:02:34,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234719844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:34,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973736049] [2021-06-05 17:02:34,136 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 17:02:34,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:02:34,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:02:34,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:34,227 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 17:02:34,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973736049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:34,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:34,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 17:02:34,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305245485] [2021-06-05 17:02:34,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:34,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:34,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:34,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:34,229 INFO L87 Difference]: Start difference. First operand 29319 states and 112339 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 17:02:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:34,841 INFO L93 Difference]: Finished difference Result 35637 states and 135551 transitions. [2021-06-05 17:02:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:02:34,842 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 17:02:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:34,923 INFO L225 Difference]: With dead ends: 35637 [2021-06-05 17:02:34,923 INFO L226 Difference]: Without dead ends: 35624 [2021-06-05 17:02:34,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:02:34,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35624 states. [2021-06-05 17:02:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35624 to 34097. [2021-06-05 17:02:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34097 states, 34096 states have (on average 3.845964335992492) internal successors, (131132), 34096 states have internal predecessors, (131132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34097 states to 34097 states and 131132 transitions. [2021-06-05 17:02:35,581 INFO L78 Accepts]: Start accepts. Automaton has 34097 states and 131132 transitions. Word has length 28 [2021-06-05 17:02:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:35,581 INFO L482 AbstractCegarLoop]: Abstraction has 34097 states and 131132 transitions. [2021-06-05 17:02:35,581 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 17:02:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 34097 states and 131132 transitions. [2021-06-05 17:02:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:35,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:35,834 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 17:02:36,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable465,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:36,035 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:36,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:36,035 INFO L82 PathProgramCache]: Analyzing trace with hash 415101939, now seen corresponding path program 127 times [2021-06-05 17:02:36,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:36,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839433919] [2021-06-05 17:02:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:36,066 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 17:02:36,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:36,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839433919] [2021-06-05 17:02:36,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839433919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:36,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981191189] [2021-06-05 17:02:36,067 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 17:02:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:36,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:02:36,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:36,142 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 17:02:36,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981191189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:36,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:36,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 17:02:36,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619919111] [2021-06-05 17:02:36,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:36,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:36,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:36,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:36,143 INFO L87 Difference]: Start difference. First operand 34097 states and 131132 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 17:02:36,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:36,499 INFO L93 Difference]: Finished difference Result 37254 states and 141034 transitions. [2021-06-05 17:02:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:02:36,499 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 17:02:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:36,588 INFO L225 Difference]: With dead ends: 37254 [2021-06-05 17:02:36,588 INFO L226 Difference]: Without dead ends: 37254 [2021-06-05 17:02:36,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:02:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37254 states. [2021-06-05 17:02:37,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37254 to 33774. [2021-06-05 17:02:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33774 states, 33773 states have (on average 3.8422704527285108) internal successors, (129765), 33773 states have internal predecessors, (129765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33774 states to 33774 states and 129765 transitions. [2021-06-05 17:02:37,428 INFO L78 Accepts]: Start accepts. Automaton has 33774 states and 129765 transitions. Word has length 28 [2021-06-05 17:02:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:37,429 INFO L482 AbstractCegarLoop]: Abstraction has 33774 states and 129765 transitions. [2021-06-05 17:02:37,429 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 17:02:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 33774 states and 129765 transitions. [2021-06-05 17:02:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:37,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:37,482 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 17:02:37,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 17:02:37,682 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:37,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:37,683 INFO L82 PathProgramCache]: Analyzing trace with hash -17774665, now seen corresponding path program 128 times [2021-06-05 17:02:37,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:37,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336530563] [2021-06-05 17:02:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:37,713 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 17:02:37,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:37,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336530563] [2021-06-05 17:02:37,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336530563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:37,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912135430] [2021-06-05 17:02:37,713 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 17:02:37,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:37,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:37,792 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 17:02:37,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912135430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:37,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:37,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:02:37,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77473902] [2021-06-05 17:02:37,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:37,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:37,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:37,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:37,793 INFO L87 Difference]: Start difference. First operand 33774 states and 129765 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 17:02:38,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:38,397 INFO L93 Difference]: Finished difference Result 40558 states and 152173 transitions. [2021-06-05 17:02:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:02:38,397 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 17:02:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:38,494 INFO L225 Difference]: With dead ends: 40558 [2021-06-05 17:02:38,494 INFO L226 Difference]: Without dead ends: 40550 [2021-06-05 17:02:38,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:02:38,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40550 states. [2021-06-05 17:02:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40550 to 33740. [2021-06-05 17:02:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33740 states, 33739 states have (on average 3.8426746495153976) internal successors, (129648), 33739 states have internal predecessors, (129648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33740 states to 33740 states and 129648 transitions. [2021-06-05 17:02:39,601 INFO L78 Accepts]: Start accepts. Automaton has 33740 states and 129648 transitions. Word has length 28 [2021-06-05 17:02:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:39,602 INFO L482 AbstractCegarLoop]: Abstraction has 33740 states and 129648 transitions. [2021-06-05 17:02:39,602 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 17:02:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 33740 states and 129648 transitions. [2021-06-05 17:02:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:39,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:39,662 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 17:02:39,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:39,863 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:39,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:39,863 INFO L82 PathProgramCache]: Analyzing trace with hash -913595481, now seen corresponding path program 129 times [2021-06-05 17:02:39,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:39,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436073245] [2021-06-05 17:02:39,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:39,895 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 17:02:39,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:39,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436073245] [2021-06-05 17:02:39,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436073245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:39,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377880627] [2021-06-05 17:02:39,895 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 17:02:39,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:02:39,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:39,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:02:39,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:39,969 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 17:02:39,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377880627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:39,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:39,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 17:02:39,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129603452] [2021-06-05 17:02:39,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:39,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:39,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:39,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:39,970 INFO L87 Difference]: Start difference. First operand 33740 states and 129648 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 17:02:40,474 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 17:02:40,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:40,656 INFO L93 Difference]: Finished difference Result 36656 states and 139373 transitions. [2021-06-05 17:02:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:02:40,656 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 17:02:40,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:40,738 INFO L225 Difference]: With dead ends: 36656 [2021-06-05 17:02:40,738 INFO L226 Difference]: Without dead ends: 36656 [2021-06-05 17:02:40,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 412.2ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:02:40,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36656 states. [2021-06-05 17:02:41,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36656 to 34272. [2021-06-05 17:02:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34272 states, 34271 states have (on average 3.8409150593796504) internal successors, (131632), 34271 states have internal predecessors, (131632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34272 states to 34272 states and 131632 transitions. [2021-06-05 17:02:41,661 INFO L78 Accepts]: Start accepts. Automaton has 34272 states and 131632 transitions. Word has length 28 [2021-06-05 17:02:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:41,661 INFO L482 AbstractCegarLoop]: Abstraction has 34272 states and 131632 transitions. [2021-06-05 17:02:41,661 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 17:02:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 34272 states and 131632 transitions. [2021-06-05 17:02:41,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:41,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:41,714 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 17:02:41,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 17:02:41,914 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:41,914 INFO L82 PathProgramCache]: Analyzing trace with hash 579561993, now seen corresponding path program 130 times [2021-06-05 17:02:41,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:41,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312688002] [2021-06-05 17:02:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:41,945 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 17:02:41,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:41,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312688002] [2021-06-05 17:02:41,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312688002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:41,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113857803] [2021-06-05 17:02:41,946 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 17:02:41,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:41,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:41,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:41,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:42,023 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 17:02:42,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113857803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:42,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:42,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:02:42,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793877690] [2021-06-05 17:02:42,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:42,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:42,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:42,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:42,025 INFO L87 Difference]: Start difference. First operand 34272 states and 131632 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 17:02:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:42,644 INFO L93 Difference]: Finished difference Result 41443 states and 155515 transitions. [2021-06-05 17:02:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:02:42,644 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 17:02:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:42,742 INFO L225 Difference]: With dead ends: 41443 [2021-06-05 17:02:42,742 INFO L226 Difference]: Without dead ends: 41419 [2021-06-05 17:02:42,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:02:42,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41419 states. [2021-06-05 17:02:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41419 to 34444. [2021-06-05 17:02:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34444 states, 34443 states have (on average 3.8372383358011786) internal successors, (132166), 34443 states have internal predecessors, (132166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34444 states to 34444 states and 132166 transitions. [2021-06-05 17:02:43,702 INFO L78 Accepts]: Start accepts. Automaton has 34444 states and 132166 transitions. Word has length 28 [2021-06-05 17:02:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:43,703 INFO L482 AbstractCegarLoop]: Abstraction has 34444 states and 132166 transitions. [2021-06-05 17:02:43,703 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 17:02:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 34444 states and 132166 transitions. [2021-06-05 17:02:43,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:43,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:43,753 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 17:02:43,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 17:02:43,953 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:43,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1271447701, now seen corresponding path program 131 times [2021-06-05 17:02:43,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:43,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201356449] [2021-06-05 17:02:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:43,991 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 17:02:43,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:43,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201356449] [2021-06-05 17:02:43,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201356449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:43,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938765437] [2021-06-05 17:02:43,992 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 17:02:44,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:02:44,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:44,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:02:44,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:44,067 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 17:02:44,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938765437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:44,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:44,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 17:02:44,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695833147] [2021-06-05 17:02:44,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:44,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:44,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:44,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:44,068 INFO L87 Difference]: Start difference. First operand 34444 states and 132166 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 17:02:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:44,818 INFO L93 Difference]: Finished difference Result 37076 states and 140866 transitions. [2021-06-05 17:02:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:02:44,818 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 17:02:44,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:44,910 INFO L225 Difference]: With dead ends: 37076 [2021-06-05 17:02:44,910 INFO L226 Difference]: Without dead ends: 37076 [2021-06-05 17:02:44,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:02:44,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37076 states. [2021-06-05 17:02:45,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37076 to 34370. [2021-06-05 17:02:45,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34370 states, 34369 states have (on average 3.8380517326660653) internal successors, (131910), 34369 states have internal predecessors, (131910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34370 states to 34370 states and 131910 transitions. [2021-06-05 17:02:45,681 INFO L78 Accepts]: Start accepts. Automaton has 34370 states and 131910 transitions. Word has length 28 [2021-06-05 17:02:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:45,681 INFO L482 AbstractCegarLoop]: Abstraction has 34370 states and 131910 transitions. [2021-06-05 17:02:45,681 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 17:02:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 34370 states and 131910 transitions. [2021-06-05 17:02:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:45,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:45,732 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 17:02:45,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:45,933 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash -412931571, now seen corresponding path program 132 times [2021-06-05 17:02:45,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:45,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73373031] [2021-06-05 17:02:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:45,970 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 17:02:45,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:45,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73373031] [2021-06-05 17:02:45,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73373031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:45,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032599136] [2021-06-05 17:02:45,970 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 17:02:45,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:02:45,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:45,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:45,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:46,258 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 17:02:46,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032599136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:46,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:46,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:02:46,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256232849] [2021-06-05 17:02:46,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:46,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:46,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:46,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:46,259 INFO L87 Difference]: Start difference. First operand 34370 states and 131910 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 17:02:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:46,914 INFO L93 Difference]: Finished difference Result 41366 states and 155256 transitions. [2021-06-05 17:02:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:02:46,914 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 17:02:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:47,003 INFO L225 Difference]: With dead ends: 41366 [2021-06-05 17:02:47,003 INFO L226 Difference]: Without dead ends: 41326 [2021-06-05 17:02:47,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:02:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41326 states. [2021-06-05 17:02:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41326 to 34544. [2021-06-05 17:02:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34544 states, 34543 states have (on average 3.834264539848884) internal successors, (132447), 34543 states have internal predecessors, (132447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34544 states to 34544 states and 132447 transitions. [2021-06-05 17:02:47,922 INFO L78 Accepts]: Start accepts. Automaton has 34544 states and 132447 transitions. Word has length 28 [2021-06-05 17:02:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:47,922 INFO L482 AbstractCegarLoop]: Abstraction has 34544 states and 132447 transitions. [2021-06-05 17:02:47,922 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 17:02:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 34544 states and 132447 transitions. [2021-06-05 17:02:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:47,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:47,974 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 17:02:48,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable471 [2021-06-05 17:02:48,174 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1625942477, now seen corresponding path program 133 times [2021-06-05 17:02:48,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:48,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459755375] [2021-06-05 17:02:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:48,205 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 17:02:48,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:48,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459755375] [2021-06-05 17:02:48,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459755375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:48,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524493469] [2021-06-05 17:02:48,205 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 17:02:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:48,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:48,332 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 17:02:48,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524493469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:48,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:48,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:02:48,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642482568] [2021-06-05 17:02:48,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:02:48,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:48,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:02:48,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:02:48,333 INFO L87 Difference]: Start difference. First operand 34544 states and 132447 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 17:02:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:49,814 INFO L93 Difference]: Finished difference Result 76905 states and 284650 transitions. [2021-06-05 17:02:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:02:49,815 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 17:02:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:50,005 INFO L225 Difference]: With dead ends: 76905 [2021-06-05 17:02:50,005 INFO L226 Difference]: Without dead ends: 76905 [2021-06-05 17:02:50,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 639.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:02:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76905 states. [2021-06-05 17:02:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76905 to 43639. [2021-06-05 17:02:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43639 states, 43638 states have (on average 3.908336770704432) internal successors, (170552), 43638 states have internal predecessors, (170552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43639 states to 43639 states and 170552 transitions. [2021-06-05 17:02:51,585 INFO L78 Accepts]: Start accepts. Automaton has 43639 states and 170552 transitions. Word has length 28 [2021-06-05 17:02:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:51,585 INFO L482 AbstractCegarLoop]: Abstraction has 43639 states and 170552 transitions. [2021-06-05 17:02:51,586 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 17:02:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 43639 states and 170552 transitions. [2021-06-05 17:02:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:51,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:51,651 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 17:02:51,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:51,852 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2102072739, now seen corresponding path program 134 times [2021-06-05 17:02:51,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:51,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727895407] [2021-06-05 17:02:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:51,884 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 17:02:51,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:51,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727895407] [2021-06-05 17:02:51,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727895407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:51,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300823819] [2021-06-05 17:02:51,884 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 17:02:51,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:51,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:51,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:51,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:52,005 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 17:02:52,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300823819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:52,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:52,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:02:52,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294561159] [2021-06-05 17:02:52,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:02:52,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:52,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:02:52,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:02:52,006 INFO L87 Difference]: Start difference. First operand 43639 states and 170552 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 17:02:53,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:53,529 INFO L93 Difference]: Finished difference Result 76303 states and 283058 transitions. [2021-06-05 17:02:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:02:53,531 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 17:02:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:53,732 INFO L225 Difference]: With dead ends: 76303 [2021-06-05 17:02:53,732 INFO L226 Difference]: Without dead ends: 76303 [2021-06-05 17:02:53,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 891.9ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:02:53,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76303 states. [2021-06-05 17:02:55,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76303 to 43636. [2021-06-05 17:02:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43636 states, 43635 states have (on average 3.908284633894809) internal successors, (170538), 43635 states have internal predecessors, (170538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43636 states to 43636 states and 170538 transitions. [2021-06-05 17:02:55,441 INFO L78 Accepts]: Start accepts. Automaton has 43636 states and 170538 transitions. Word has length 28 [2021-06-05 17:02:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:55,441 INFO L482 AbstractCegarLoop]: Abstraction has 43636 states and 170538 transitions. [2021-06-05 17:02:55,441 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 17:02:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 43636 states and 170538 transitions. [2021-06-05 17:02:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:55,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:55,506 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 17:02:55,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:55,707 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:55,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1020548699, now seen corresponding path program 135 times [2021-06-05 17:02:55,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:55,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739189929] [2021-06-05 17:02:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:55,739 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 17:02:55,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:55,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739189929] [2021-06-05 17:02:55,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739189929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:55,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581801305] [2021-06-05 17:02:55,739 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 17:02:55,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:02:55,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:55,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:55,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:55,851 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 17:02:55,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581801305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:55,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:55,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:02:55,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922857151] [2021-06-05 17:02:55,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:02:55,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:55,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:02:55,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:02:55,852 INFO L87 Difference]: Start difference. First operand 43636 states and 170538 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 17:02:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:56,982 INFO L93 Difference]: Finished difference Result 70919 states and 264966 transitions. [2021-06-05 17:02:56,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:02:56,982 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 17:02:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:57,484 INFO L225 Difference]: With dead ends: 70919 [2021-06-05 17:02:57,484 INFO L226 Difference]: Without dead ends: 70919 [2021-06-05 17:02:57,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:02:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70919 states. [2021-06-05 17:02:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70919 to 43660. [2021-06-05 17:02:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43660 states, 43659 states have (on average 3.9085182894706705) internal successors, (170642), 43659 states have internal predecessors, (170642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43660 states to 43660 states and 170642 transitions. [2021-06-05 17:02:58,976 INFO L78 Accepts]: Start accepts. Automaton has 43660 states and 170642 transitions. Word has length 28 [2021-06-05 17:02:58,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:58,976 INFO L482 AbstractCegarLoop]: Abstraction has 43660 states and 170642 transitions. [2021-06-05 17:02:58,976 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 17:02:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 43660 states and 170642 transitions. [2021-06-05 17:02:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:02:59,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:59,041 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 17:02:59,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 17:02:59,242 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:59,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:59,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1101924787, now seen corresponding path program 136 times [2021-06-05 17:02:59,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:59,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058264710] [2021-06-05 17:02:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:59,272 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 17:02:59,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058264710] [2021-06-05 17:02:59,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058264710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36572619] [2021-06-05 17:02:59,273 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 17:02:59,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:59,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:59,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:02:59,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:59,382 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 17:02:59,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36572619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:59,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:59,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:02:59,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203036786] [2021-06-05 17:02:59,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:02:59,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:59,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:02:59,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:02:59,383 INFO L87 Difference]: Start difference. First operand 43660 states and 170642 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 17:03:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:00,740 INFO L93 Difference]: Finished difference Result 70043 states and 262701 transitions. [2021-06-05 17:03:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:03:00,741 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 17:03:00,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:00,957 INFO L225 Difference]: With dead ends: 70043 [2021-06-05 17:03:00,958 INFO L226 Difference]: Without dead ends: 70035 [2021-06-05 17:03:00,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 483.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:03:01,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70035 states. [2021-06-05 17:03:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70035 to 43660. [2021-06-05 17:03:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43660 states, 43659 states have (on average 3.908380860761813) internal successors, (170636), 43659 states have internal predecessors, (170636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:02,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43660 states to 43660 states and 170636 transitions. [2021-06-05 17:03:02,407 INFO L78 Accepts]: Start accepts. Automaton has 43660 states and 170636 transitions. Word has length 28 [2021-06-05 17:03:02,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:02,407 INFO L482 AbstractCegarLoop]: Abstraction has 43660 states and 170636 transitions. [2021-06-05 17:03:02,407 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 17:03:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 43660 states and 170636 transitions. [2021-06-05 17:03:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:02,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:02,474 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 17:03:02,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:02,674 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2032582003, now seen corresponding path program 137 times [2021-06-05 17:03:02,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:02,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429196059] [2021-06-05 17:03:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:02,705 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 17:03:02,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:02,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429196059] [2021-06-05 17:03:02,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429196059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:02,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74658618] [2021-06-05 17:03:02,706 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 17:03:02,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:03:02,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:02,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:02,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:02,826 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 17:03:02,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74658618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:02,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:02,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:03:02,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100879380] [2021-06-05 17:03:02,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:03:02,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:02,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:03:02,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:03:02,827 INFO L87 Difference]: Start difference. First operand 43660 states and 170636 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 17:03:04,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:04,253 INFO L93 Difference]: Finished difference Result 69550 states and 261394 transitions. [2021-06-05 17:03:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:03:04,253 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 17:03:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:04,445 INFO L225 Difference]: With dead ends: 69550 [2021-06-05 17:03:04,445 INFO L226 Difference]: Without dead ends: 69550 [2021-06-05 17:03:04,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:03:04,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69550 states. [2021-06-05 17:03:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69550 to 43668. [2021-06-05 17:03:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43668 states, 43667 states have (on average 3.908443446996588) internal successors, (170670), 43667 states have internal predecessors, (170670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43668 states to 43668 states and 170670 transitions. [2021-06-05 17:03:05,971 INFO L78 Accepts]: Start accepts. Automaton has 43668 states and 170670 transitions. Word has length 28 [2021-06-05 17:03:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:05,971 INFO L482 AbstractCegarLoop]: Abstraction has 43668 states and 170670 transitions. [2021-06-05 17:03:05,971 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 17:03:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 43668 states and 170670 transitions. [2021-06-05 17:03:06,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:06,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:06,037 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 17:03:06,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 17:03:06,237 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:06,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:06,238 INFO L82 PathProgramCache]: Analyzing trace with hash -619346139, now seen corresponding path program 138 times [2021-06-05 17:03:06,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:06,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149673793] [2021-06-05 17:03:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:06,269 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 17:03:06,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:06,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149673793] [2021-06-05 17:03:06,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149673793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:06,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630046170] [2021-06-05 17:03:06,269 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 17:03:06,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:03:06,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:06,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:06,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:06,384 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 17:03:06,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630046170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:06,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:06,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:03:06,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281594117] [2021-06-05 17:03:06,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:03:06,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:06,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:03:06,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:03:06,385 INFO L87 Difference]: Start difference. First operand 43668 states and 170670 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 17:03:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:07,753 INFO L93 Difference]: Finished difference Result 69317 states and 260810 transitions. [2021-06-05 17:03:07,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:03:07,754 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 17:03:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:07,946 INFO L225 Difference]: With dead ends: 69317 [2021-06-05 17:03:07,947 INFO L226 Difference]: Without dead ends: 69309 [2021-06-05 17:03:07,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 509.7ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:03:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69309 states. [2021-06-05 17:03:09,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69309 to 43668. [2021-06-05 17:03:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43668 states, 43667 states have (on average 3.908397645819498) internal successors, (170668), 43667 states have internal predecessors, (170668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43668 states to 43668 states and 170668 transitions. [2021-06-05 17:03:09,444 INFO L78 Accepts]: Start accepts. Automaton has 43668 states and 170668 transitions. Word has length 28 [2021-06-05 17:03:09,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:09,445 INFO L482 AbstractCegarLoop]: Abstraction has 43668 states and 170668 transitions. [2021-06-05 17:03:09,445 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 17:03:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 43668 states and 170668 transitions. [2021-06-05 17:03:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:09,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:09,510 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 17:03:09,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 17:03:09,711 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:09,711 INFO L82 PathProgramCache]: Analyzing trace with hash 384081845, now seen corresponding path program 139 times [2021-06-05 17:03:09,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:09,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997245154] [2021-06-05 17:03:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:09,743 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 17:03:09,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:09,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997245154] [2021-06-05 17:03:09,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997245154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:09,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731293186] [2021-06-05 17:03:09,743 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 17:03:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:09,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:09,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:09,845 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 17:03:09,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731293186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:09,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:09,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:03:09,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529365512] [2021-06-05 17:03:09,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:03:09,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:09,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:03:09,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:03:09,846 INFO L87 Difference]: Start difference. First operand 43668 states and 170668 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 17:03:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:11,403 INFO L93 Difference]: Finished difference Result 68845 states and 257637 transitions. [2021-06-05 17:03:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:03:11,404 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 17:03:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:11,584 INFO L225 Difference]: With dead ends: 68845 [2021-06-05 17:03:11,584 INFO L226 Difference]: Without dead ends: 68845 [2021-06-05 17:03:11,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 932.0ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 17:03:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68845 states. [2021-06-05 17:03:12,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68845 to 46904. [2021-06-05 17:03:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46904 states, 46903 states have (on average 3.911754045583438) internal successors, (183473), 46903 states have internal predecessors, (183473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46904 states to 46904 states and 183473 transitions. [2021-06-05 17:03:13,368 INFO L78 Accepts]: Start accepts. Automaton has 46904 states and 183473 transitions. Word has length 28 [2021-06-05 17:03:13,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:13,368 INFO L482 AbstractCegarLoop]: Abstraction has 46904 states and 183473 transitions. [2021-06-05 17:03:13,368 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 17:03:13,368 INFO L276 IsEmpty]: Start isEmpty. Operand 46904 states and 183473 transitions. [2021-06-05 17:03:13,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:13,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:13,444 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 17:03:13,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 17:03:13,645 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:13,645 INFO L82 PathProgramCache]: Analyzing trace with hash 465457933, now seen corresponding path program 140 times [2021-06-05 17:03:13,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:13,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288877023] [2021-06-05 17:03:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:13,676 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 17:03:13,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:13,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288877023] [2021-06-05 17:03:13,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288877023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:13,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536229406] [2021-06-05 17:03:13,677 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 17:03:13,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:13,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:13,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:13,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:13,772 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 17:03:13,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536229406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:13,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:13,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:03:13,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898032422] [2021-06-05 17:03:13,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:03:13,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:13,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:03:13,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:03:13,773 INFO L87 Difference]: Start difference. First operand 46904 states and 183473 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 17:03:14,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:14,768 INFO L93 Difference]: Finished difference Result 68346 states and 256324 transitions. [2021-06-05 17:03:14,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:03:14,769 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 17:03:14,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:14,946 INFO L225 Difference]: With dead ends: 68346 [2021-06-05 17:03:14,947 INFO L226 Difference]: Without dead ends: 68338 [2021-06-05 17:03:14,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:03:15,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68338 states. [2021-06-05 17:03:16,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68338 to 46598. [2021-06-05 17:03:16,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46598 states, 46597 states have (on average 3.917119127840848) internal successors, (182526), 46597 states have internal predecessors, (182526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46598 states to 46598 states and 182526 transitions. [2021-06-05 17:03:16,761 INFO L78 Accepts]: Start accepts. Automaton has 46598 states and 182526 transitions. Word has length 28 [2021-06-05 17:03:16,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:16,761 INFO L482 AbstractCegarLoop]: Abstraction has 46598 states and 182526 transitions. [2021-06-05 17:03:16,761 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 17:03:16,761 INFO L276 IsEmpty]: Start isEmpty. Operand 46598 states and 182526 transitions. [2021-06-05 17:03:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:16,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:16,835 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 17:03:17,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:17,035 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:17,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:17,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1049634039, now seen corresponding path program 141 times [2021-06-05 17:03:17,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:17,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757154302] [2021-06-05 17:03:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:17,067 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 17:03:17,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:17,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757154302] [2021-06-05 17:03:17,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757154302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:17,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440440563] [2021-06-05 17:03:17,068 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 17:03:17,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:03:17,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:17,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:17,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:17,178 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 17:03:17,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440440563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:17,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:17,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:03:17,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210041574] [2021-06-05 17:03:17,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:03:17,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:17,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:03:17,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:03:17,180 INFO L87 Difference]: Start difference. First operand 46598 states and 182526 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 17:03:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:18,028 INFO L93 Difference]: Finished difference Result 66749 states and 251892 transitions. [2021-06-05 17:03:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:03:18,029 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 17:03:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:18,202 INFO L225 Difference]: With dead ends: 66749 [2021-06-05 17:03:18,202 INFO L226 Difference]: Without dead ends: 66725 [2021-06-05 17:03:18,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:03:18,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66725 states. [2021-06-05 17:03:19,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66725 to 46494. [2021-06-05 17:03:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46494 states, 46493 states have (on average 3.9171058008732498) internal successors, (182118), 46493 states have internal predecessors, (182118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:20,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46494 states to 46494 states and 182118 transitions. [2021-06-05 17:03:20,004 INFO L78 Accepts]: Start accepts. Automaton has 46494 states and 182118 transitions. Word has length 28 [2021-06-05 17:03:20,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:20,005 INFO L482 AbstractCegarLoop]: Abstraction has 46494 states and 182118 transitions. [2021-06-05 17:03:20,005 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 17:03:20,005 INFO L276 IsEmpty]: Start isEmpty. Operand 46494 states and 182118 transitions. [2021-06-05 17:03:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:20,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:20,074 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 17:03:20,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:20,275 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:20,275 INFO L82 PathProgramCache]: Analyzing trace with hash 547492677, now seen corresponding path program 142 times [2021-06-05 17:03:20,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:20,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767345209] [2021-06-05 17:03:20,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:20,307 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 17:03:20,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:20,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767345209] [2021-06-05 17:03:20,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767345209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:20,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950252578] [2021-06-05 17:03:20,307 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 17:03:20,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:20,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:20,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:20,426 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 17:03:20,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950252578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:20,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:20,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:03:20,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896068291] [2021-06-05 17:03:20,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:03:20,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:20,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:03:20,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:03:20,427 INFO L87 Difference]: Start difference. First operand 46494 states and 182118 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 17:03:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:21,563 INFO L93 Difference]: Finished difference Result 67947 states and 255225 transitions. [2021-06-05 17:03:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 17:03:21,563 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 17:03:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:22,073 INFO L225 Difference]: With dead ends: 67947 [2021-06-05 17:03:22,073 INFO L226 Difference]: Without dead ends: 67947 [2021-06-05 17:03:22,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 577.6ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:03:22,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67947 states. [2021-06-05 17:03:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67947 to 46590. [2021-06-05 17:03:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46590 states, 46589 states have (on average 3.9157741097684005) internal successors, (182432), 46589 states have internal predecessors, (182432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:23,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46590 states to 46590 states and 182432 transitions. [2021-06-05 17:03:23,536 INFO L78 Accepts]: Start accepts. Automaton has 46590 states and 182432 transitions. Word has length 28 [2021-06-05 17:03:23,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:23,536 INFO L482 AbstractCegarLoop]: Abstraction has 46590 states and 182432 transitions. [2021-06-05 17:03:23,536 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 17:03:23,536 INFO L276 IsEmpty]: Start isEmpty. Operand 46590 states and 182432 transitions. [2021-06-05 17:03:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:23,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:23,604 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 17:03:23,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:23,804 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:23,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2104435465, now seen corresponding path program 143 times [2021-06-05 17:03:23,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:23,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392208590] [2021-06-05 17:03:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:23,836 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 17:03:23,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:23,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392208590] [2021-06-05 17:03:23,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392208590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:23,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330486791] [2021-06-05 17:03:23,836 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 17:03:23,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:03:23,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:23,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:23,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:23,952 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 17:03:23,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330486791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:23,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:23,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:03:23,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530130084] [2021-06-05 17:03:23,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:03:23,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:23,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:03:23,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:03:23,953 INFO L87 Difference]: Start difference. First operand 46590 states and 182432 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 17:03:24,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:24,976 INFO L93 Difference]: Finished difference Result 67507 states and 253969 transitions. [2021-06-05 17:03:24,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:03:24,977 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 17:03:24,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:25,154 INFO L225 Difference]: With dead ends: 67507 [2021-06-05 17:03:25,154 INFO L226 Difference]: Without dead ends: 67499 [2021-06-05 17:03:25,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 478.4ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:03:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67499 states. [2021-06-05 17:03:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67499 to 46522. [2021-06-05 17:03:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46522 states, 46521 states have (on average 3.916940736441607) internal successors, (182220), 46521 states have internal predecessors, (182220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:26,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46522 states to 46522 states and 182220 transitions. [2021-06-05 17:03:26,904 INFO L78 Accepts]: Start accepts. Automaton has 46522 states and 182220 transitions. Word has length 28 [2021-06-05 17:03:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:26,904 INFO L482 AbstractCegarLoop]: Abstraction has 46522 states and 182220 transitions. [2021-06-05 17:03:26,904 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 17:03:26,904 INFO L276 IsEmpty]: Start isEmpty. Operand 46522 states and 182220 transitions. [2021-06-05 17:03:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:26,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:26,972 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 17:03:27,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:27,172 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash 923074653, now seen corresponding path program 144 times [2021-06-05 17:03:27,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:27,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394186015] [2021-06-05 17:03:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:27,212 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 17:03:27,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:27,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394186015] [2021-06-05 17:03:27,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394186015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:27,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129388924] [2021-06-05 17:03:27,212 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 17:03:27,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:03:27,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:27,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:27,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:27,317 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 17:03:27,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129388924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:27,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:27,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:03:27,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298330098] [2021-06-05 17:03:27,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:03:27,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:27,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:03:27,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:03:27,318 INFO L87 Difference]: Start difference. First operand 46522 states and 182220 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 17:03:28,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:28,161 INFO L93 Difference]: Finished difference Result 66238 states and 250458 transitions. [2021-06-05 17:03:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:03:28,162 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 17:03:28,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:28,335 INFO L225 Difference]: With dead ends: 66238 [2021-06-05 17:03:28,335 INFO L226 Difference]: Without dead ends: 66214 [2021-06-05 17:03:28,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:03:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66214 states. [2021-06-05 17:03:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66214 to 46498. [2021-06-05 17:03:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46498 states, 46497 states have (on average 3.9170699184893647) internal successors, (182132), 46497 states have internal predecessors, (182132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:30,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46498 states to 46498 states and 182132 transitions. [2021-06-05 17:03:30,258 INFO L78 Accepts]: Start accepts. Automaton has 46498 states and 182132 transitions. Word has length 28 [2021-06-05 17:03:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:30,258 INFO L482 AbstractCegarLoop]: Abstraction has 46498 states and 182132 transitions. [2021-06-05 17:03:30,258 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 17:03:30,258 INFO L276 IsEmpty]: Start isEmpty. Operand 46498 states and 182132 transitions. [2021-06-05 17:03:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:30,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:30,326 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 17:03:30,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-06-05 17:03:30,527 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:30,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:30,527 INFO L82 PathProgramCache]: Analyzing trace with hash 100408761, now seen corresponding path program 145 times [2021-06-05 17:03:30,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:30,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370590342] [2021-06-05 17:03:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:30,564 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 17:03:30,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:30,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370590342] [2021-06-05 17:03:30,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370590342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:30,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751277120] [2021-06-05 17:03:30,564 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 17:03:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:30,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:30,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:30,657 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 17:03:30,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751277120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:30,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:30,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:03:30,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703340780] [2021-06-05 17:03:30,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:03:30,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:30,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:03:30,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:03:30,657 INFO L87 Difference]: Start difference. First operand 46498 states and 182132 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 17:03:32,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:32,417 INFO L93 Difference]: Finished difference Result 69780 states and 260558 transitions. [2021-06-05 17:03:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 17:03:32,417 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 17:03:32,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:32,608 INFO L225 Difference]: With dead ends: 69780 [2021-06-05 17:03:32,608 INFO L226 Difference]: Without dead ends: 69780 [2021-06-05 17:03:32,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 820.2ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 17:03:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69780 states. [2021-06-05 17:03:33,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69780 to 51268. [2021-06-05 17:03:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51268 states, 51267 states have (on average 3.8675756334484173) internal successors, (198279), 51267 states have internal predecessors, (198279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51268 states to 51268 states and 198279 transitions. [2021-06-05 17:03:34,170 INFO L78 Accepts]: Start accepts. Automaton has 51268 states and 198279 transitions. Word has length 28 [2021-06-05 17:03:34,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:34,170 INFO L482 AbstractCegarLoop]: Abstraction has 51268 states and 198279 transitions. [2021-06-05 17:03:34,170 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 17:03:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 51268 states and 198279 transitions. [2021-06-05 17:03:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:34,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:34,246 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 17:03:34,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:34,449 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:34,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:34,449 INFO L82 PathProgramCache]: Analyzing trace with hash 181784849, now seen corresponding path program 146 times [2021-06-05 17:03:34,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:34,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736839931] [2021-06-05 17:03:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:34,485 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 17:03:34,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:34,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736839931] [2021-06-05 17:03:34,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736839931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:34,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868538562] [2021-06-05 17:03:34,486 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 17:03:34,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:34,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:34,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:34,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:34,583 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 17:03:34,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868538562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:34,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:34,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:03:34,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989190225] [2021-06-05 17:03:34,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:03:34,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:34,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:03:34,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:03:34,584 INFO L87 Difference]: Start difference. First operand 51268 states and 198279 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 17:03:36,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:36,177 INFO L93 Difference]: Finished difference Result 68981 states and 258379 transitions. [2021-06-05 17:03:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:03:36,177 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 17:03:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:36,358 INFO L225 Difference]: With dead ends: 68981 [2021-06-05 17:03:36,358 INFO L226 Difference]: Without dead ends: 68973 [2021-06-05 17:03:36,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 649.4ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 17:03:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68973 states. [2021-06-05 17:03:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68973 to 50106. [2021-06-05 17:03:37,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50106 states, 50105 states have (on average 3.885001496856601) internal successors, (194658), 50105 states have internal predecessors, (194658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50106 states to 50106 states and 194658 transitions. [2021-06-05 17:03:38,083 INFO L78 Accepts]: Start accepts. Automaton has 50106 states and 194658 transitions. Word has length 28 [2021-06-05 17:03:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:38,083 INFO L482 AbstractCegarLoop]: Abstraction has 50106 states and 194658 transitions. [2021-06-05 17:03:38,083 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 17:03:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 50106 states and 194658 transitions. [2021-06-05 17:03:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:38,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:38,161 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 17:03:38,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 17:03:38,361 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:38,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:38,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1333307123, now seen corresponding path program 147 times [2021-06-05 17:03:38,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:38,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494688437] [2021-06-05 17:03:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:38,398 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 17:03:38,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:38,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494688437] [2021-06-05 17:03:38,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494688437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:38,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820677825] [2021-06-05 17:03:38,398 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 17:03:38,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:03:38,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:38,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:38,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:38,486 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 17:03:38,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820677825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:38,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:38,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:03:38,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849014250] [2021-06-05 17:03:38,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:03:38,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:38,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:03:38,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:03:38,487 INFO L87 Difference]: Start difference. First operand 50106 states and 194658 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 17:03:39,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:39,919 INFO L93 Difference]: Finished difference Result 67179 states and 253388 transitions. [2021-06-05 17:03:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:03:39,919 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 17:03:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:40,095 INFO L225 Difference]: With dead ends: 67179 [2021-06-05 17:03:40,096 INFO L226 Difference]: Without dead ends: 67155 [2021-06-05 17:03:40,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 869.2ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:03:40,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67155 states. [2021-06-05 17:03:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67155 to 50086. [2021-06-05 17:03:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50086 states, 50085 states have (on average 3.883278426674653) internal successors, (194494), 50085 states have internal predecessors, (194494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50086 states to 50086 states and 194494 transitions. [2021-06-05 17:03:41,634 INFO L78 Accepts]: Start accepts. Automaton has 50086 states and 194494 transitions. Word has length 28 [2021-06-05 17:03:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:41,634 INFO L482 AbstractCegarLoop]: Abstraction has 50086 states and 194494 transitions. [2021-06-05 17:03:41,634 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 17:03:41,634 INFO L276 IsEmpty]: Start isEmpty. Operand 50086 states and 194494 transitions. [2021-06-05 17:03:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:41,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:41,709 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 17:03:41,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 17:03:41,909 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:41,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:41,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1959694861, now seen corresponding path program 148 times [2021-06-05 17:03:41,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:41,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803868591] [2021-06-05 17:03:41,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:41,946 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 17:03:41,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:41,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803868591] [2021-06-05 17:03:41,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803868591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:41,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955693358] [2021-06-05 17:03:41,947 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 17:03:42,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:42,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:42,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:42,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:42,365 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 17:03:42,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955693358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:42,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:42,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:03:42,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412088024] [2021-06-05 17:03:42,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:03:42,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:42,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:03:42,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:03:42,366 INFO L87 Difference]: Start difference. First operand 50086 states and 194494 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 17:03:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:43,415 INFO L93 Difference]: Finished difference Result 68547 states and 257187 transitions. [2021-06-05 17:03:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:03:43,416 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 17:03:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:43,606 INFO L225 Difference]: With dead ends: 68547 [2021-06-05 17:03:43,606 INFO L226 Difference]: Without dead ends: 68507 [2021-06-05 17:03:43,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 504.4ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:03:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68507 states. [2021-06-05 17:03:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68507 to 50240. [2021-06-05 17:03:45,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50240 states, 50239 states have (on average 3.882621071279285) internal successors, (195059), 50239 states have internal predecessors, (195059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50240 states to 50240 states and 195059 transitions. [2021-06-05 17:03:45,496 INFO L78 Accepts]: Start accepts. Automaton has 50240 states and 195059 transitions. Word has length 28 [2021-06-05 17:03:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:45,496 INFO L482 AbstractCegarLoop]: Abstraction has 50240 states and 195059 transitions. [2021-06-05 17:03:45,496 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 17:03:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 50240 states and 195059 transitions. [2021-06-05 17:03:45,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:45,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:45,607 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 17:03:45,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-05 17:03:45,828 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash 243917385, now seen corresponding path program 149 times [2021-06-05 17:03:45,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:45,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213371811] [2021-06-05 17:03:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:45,874 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 17:03:45,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:45,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213371811] [2021-06-05 17:03:45,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213371811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:45,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337559746] [2021-06-05 17:03:45,875 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 17:03:45,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:03:45,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:45,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:45,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:46,027 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 17:03:46,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337559746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:46,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:46,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:03:46,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337031217] [2021-06-05 17:03:46,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:46,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:46,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:46,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:46,029 INFO L87 Difference]: Start difference. First operand 50240 states and 195059 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 17:03:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:47,647 INFO L93 Difference]: Finished difference Result 67665 states and 254567 transitions. [2021-06-05 17:03:47,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 17:03:47,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 17:03:47,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:47,843 INFO L225 Difference]: With dead ends: 67665 [2021-06-05 17:03:47,844 INFO L226 Difference]: Without dead ends: 67665 [2021-06-05 17:03:47,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 919.9ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 17:03:47,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67665 states. [2021-06-05 17:03:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67665 to 51145. [2021-06-05 17:03:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51145 states, 51144 states have (on average 3.8739637103081495) internal successors, (198130), 51144 states have internal predecessors, (198130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51145 states to 51145 states and 198130 transitions. [2021-06-05 17:03:49,623 INFO L78 Accepts]: Start accepts. Automaton has 51145 states and 198130 transitions. Word has length 28 [2021-06-05 17:03:49,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:49,623 INFO L482 AbstractCegarLoop]: Abstraction has 51145 states and 198130 transitions. [2021-06-05 17:03:49,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 17:03:49,624 INFO L276 IsEmpty]: Start isEmpty. Operand 51145 states and 198130 transitions. [2021-06-05 17:03:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:49,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:49,701 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 17:03:49,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 17:03:49,901 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956539, now seen corresponding path program 150 times [2021-06-05 17:03:49,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:49,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042893158] [2021-06-05 17:03:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:49,946 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 17:03:49,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:49,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042893158] [2021-06-05 17:03:49,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042893158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:49,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750937246] [2021-06-05 17:03:49,947 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 17:03:49,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:03:49,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:49,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:50,063 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 17:03:50,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750937246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:50,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:50,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:03:50,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197756668] [2021-06-05 17:03:50,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:50,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:50,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:50,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:50,064 INFO L87 Difference]: Start difference. First operand 51145 states and 198130 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 17:03:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:51,317 INFO L93 Difference]: Finished difference Result 67040 states and 252804 transitions. [2021-06-05 17:03:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:03:51,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 17:03:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:51,882 INFO L225 Difference]: With dead ends: 67040 [2021-06-05 17:03:51,882 INFO L226 Difference]: Without dead ends: 67032 [2021-06-05 17:03:51,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 653.8ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:03:51,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67032 states. [2021-06-05 17:03:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67032 to 51069. [2021-06-05 17:03:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51069 states, 51068 states have (on average 3.875107699537871) internal successors, (197894), 51068 states have internal predecessors, (197894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51069 states to 51069 states and 197894 transitions. [2021-06-05 17:03:53,292 INFO L78 Accepts]: Start accepts. Automaton has 51069 states and 197894 transitions. Word has length 28 [2021-06-05 17:03:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:53,292 INFO L482 AbstractCegarLoop]: Abstraction has 51069 states and 197894 transitions. [2021-06-05 17:03:53,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 17:03:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 51069 states and 197894 transitions. [2021-06-05 17:03:53,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:53,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:53,362 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 17:03:53,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 17:03:53,563 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:53,563 INFO L82 PathProgramCache]: Analyzing trace with hash 619499361, now seen corresponding path program 151 times [2021-06-05 17:03:53,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:53,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481272013] [2021-06-05 17:03:53,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:53,600 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 17:03:53,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:53,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481272013] [2021-06-05 17:03:53,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481272013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:53,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876439860] [2021-06-05 17:03:53,600 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 17:03:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:53,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:53,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:53,705 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 17:03:53,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876439860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:53,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:53,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:03:53,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342494727] [2021-06-05 17:03:53,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:03:53,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:53,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:03:53,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:03:53,706 INFO L87 Difference]: Start difference. First operand 51069 states and 197894 transitions. Second operand has 16 states, 16 states have (on average 2.625) 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 17:03:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:54,808 INFO L93 Difference]: Finished difference Result 66517 states and 251558 transitions. [2021-06-05 17:03:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:03:54,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) 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 28 [2021-06-05 17:03:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:55,419 INFO L225 Difference]: With dead ends: 66517 [2021-06-05 17:03:55,419 INFO L226 Difference]: Without dead ends: 66493 [2021-06-05 17:03:55,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:03:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66493 states. [2021-06-05 17:03:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66493 to 51055. [2021-06-05 17:03:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51055 states, 51054 states have (on average 3.8750930387432914) internal successors, (197839), 51054 states have internal predecessors, (197839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51055 states to 51055 states and 197839 transitions. [2021-06-05 17:03:56,955 INFO L78 Accepts]: Start accepts. Automaton has 51055 states and 197839 transitions. Word has length 28 [2021-06-05 17:03:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:56,955 INFO L482 AbstractCegarLoop]: Abstraction has 51055 states and 197839 transitions. [2021-06-05 17:03:56,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) 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 17:03:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 51055 states and 197839 transitions. [2021-06-05 17:03:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:03:57,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:57,029 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 17:03:57,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:57,230 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:57,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:57,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085277, now seen corresponding path program 152 times [2021-06-05 17:03:57,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:57,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452208670] [2021-06-05 17:03:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:57,267 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 17:03:57,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:57,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452208670] [2021-06-05 17:03:57,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452208670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:57,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740066664] [2021-06-05 17:03:57,268 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 17:03:57,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:57,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:57,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:03:57,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:57,362 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 17:03:57,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740066664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:57,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:57,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:03:57,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097710794] [2021-06-05 17:03:57,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:03:57,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:57,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:03:57,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:03:57,363 INFO L87 Difference]: Start difference. First operand 51055 states and 197839 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 17:03:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:58,400 INFO L93 Difference]: Finished difference Result 66299 states and 250865 transitions. [2021-06-05 17:03:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 17:03:58,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 17:03:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:58,960 INFO L225 Difference]: With dead ends: 66299 [2021-06-05 17:03:58,960 INFO L226 Difference]: Without dead ends: 66259 [2021-06-05 17:03:58,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:03:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66259 states. [2021-06-05 17:04:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66259 to 51404. [2021-06-05 17:04:00,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51404 states, 51403 states have (on average 3.87658307880863) internal successors, (199268), 51403 states have internal predecessors, (199268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51404 states to 51404 states and 199268 transitions. [2021-06-05 17:04:00,528 INFO L78 Accepts]: Start accepts. Automaton has 51404 states and 199268 transitions. Word has length 28 [2021-06-05 17:04:00,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:00,528 INFO L482 AbstractCegarLoop]: Abstraction has 51404 states and 199268 transitions. [2021-06-05 17:04:00,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 17:04:00,528 INFO L276 IsEmpty]: Start isEmpty. Operand 51404 states and 199268 transitions. [2021-06-05 17:04:00,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:00,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:00,604 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 17:04:00,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:00,805 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:00,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:00,805 INFO L82 PathProgramCache]: Analyzing trace with hash 806750187, now seen corresponding path program 153 times [2021-06-05 17:04:00,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:00,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801809886] [2021-06-05 17:04:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:00,852 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 17:04:00,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:00,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801809886] [2021-06-05 17:04:00,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801809886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:00,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702930000] [2021-06-05 17:04:00,852 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 17:04:00,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:04:00,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:00,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:00,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:00,965 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 17:04:00,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702930000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:00,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:00,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:04:00,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473264103] [2021-06-05 17:04:00,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:00,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:00,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:00,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:00,966 INFO L87 Difference]: Start difference. First operand 51404 states and 199268 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 17:04:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:02,535 INFO L93 Difference]: Finished difference Result 80562 states and 301306 transitions. [2021-06-05 17:04:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:04:02,536 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 17:04:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:02,772 INFO L225 Difference]: With dead ends: 80562 [2021-06-05 17:04:02,772 INFO L226 Difference]: Without dead ends: 80562 [2021-06-05 17:04:02,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 580.3ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:04:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80562 states. [2021-06-05 17:04:04,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80562 to 52570. [2021-06-05 17:04:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52570 states, 52569 states have (on average 3.888660617474177) internal successors, (204423), 52569 states have internal predecessors, (204423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52570 states to 52570 states and 204423 transitions. [2021-06-05 17:04:04,498 INFO L78 Accepts]: Start accepts. Automaton has 52570 states and 204423 transitions. Word has length 28 [2021-06-05 17:04:04,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:04,498 INFO L482 AbstractCegarLoop]: Abstraction has 52570 states and 204423 transitions. [2021-06-05 17:04:04,498 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 17:04:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 52570 states and 204423 transitions. [2021-06-05 17:04:04,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:04,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:04,582 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 17:04:04,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:04,782 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:04,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:04,783 INFO L82 PathProgramCache]: Analyzing trace with hash 132028309, now seen corresponding path program 154 times [2021-06-05 17:04:04,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:04,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059319075] [2021-06-05 17:04:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:04,824 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 17:04:04,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:04,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059319075] [2021-06-05 17:04:04,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059319075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:04,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90629943] [2021-06-05 17:04:04,824 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 17:04:04,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:04,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:04,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:04,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:04,935 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 17:04:04,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90629943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:04,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:04,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:04:04,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332124280] [2021-06-05 17:04:04,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:04,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:04,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:04,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:04,936 INFO L87 Difference]: Start difference. First operand 52570 states and 204423 transitions. Second operand has 16 states, 16 states have (on average 2.625) 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 17:04:06,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:06,397 INFO L93 Difference]: Finished difference Result 73577 states and 279250 transitions. [2021-06-05 17:04:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:04:06,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) 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 28 [2021-06-05 17:04:06,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:06,592 INFO L225 Difference]: With dead ends: 73577 [2021-06-05 17:04:06,592 INFO L226 Difference]: Without dead ends: 73577 [2021-06-05 17:04:06,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:04:06,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73577 states. [2021-06-05 17:04:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73577 to 52600. [2021-06-05 17:04:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52600 states, 52599 states have (on average 3.888476967242723) internal successors, (204530), 52599 states have internal predecessors, (204530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52600 states to 52600 states and 204530 transitions. [2021-06-05 17:04:08,256 INFO L78 Accepts]: Start accepts. Automaton has 52600 states and 204530 transitions. Word has length 28 [2021-06-05 17:04:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:08,256 INFO L482 AbstractCegarLoop]: Abstraction has 52600 states and 204530 transitions. [2021-06-05 17:04:08,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) 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 17:04:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 52600 states and 204530 transitions. [2021-06-05 17:04:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:08,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:08,334 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 17:04:08,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:08,534 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:08,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1785388485, now seen corresponding path program 155 times [2021-06-05 17:04:08,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:08,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564241956] [2021-06-05 17:04:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:08,571 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 17:04:08,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:08,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564241956] [2021-06-05 17:04:08,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564241956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:08,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994401154] [2021-06-05 17:04:08,572 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 17:04:08,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:04:08,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:08,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:08,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:09,047 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 17:04:09,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994401154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:09,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:09,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:04:09,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31481383] [2021-06-05 17:04:09,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:09,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:09,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:09,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:09,048 INFO L87 Difference]: Start difference. First operand 52600 states and 204530 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 17:04:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:10,662 INFO L93 Difference]: Finished difference Result 74613 states and 282201 transitions. [2021-06-05 17:04:10,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:04:10,663 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 17:04:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:10,859 INFO L225 Difference]: With dead ends: 74613 [2021-06-05 17:04:10,859 INFO L226 Difference]: Without dead ends: 74613 [2021-06-05 17:04:10,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1229.6ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 17:04:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74613 states. [2021-06-05 17:04:12,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74613 to 52864. [2021-06-05 17:04:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52864 states, 52863 states have (on average 3.8852883869625257) internal successors, (205388), 52863 states have internal predecessors, (205388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52864 states to 52864 states and 205388 transitions. [2021-06-05 17:04:12,662 INFO L78 Accepts]: Start accepts. Automaton has 52864 states and 205388 transitions. Word has length 28 [2021-06-05 17:04:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:12,662 INFO L482 AbstractCegarLoop]: Abstraction has 52864 states and 205388 transitions. [2021-06-05 17:04:12,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 17:04:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 52864 states and 205388 transitions. [2021-06-05 17:04:12,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:12,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:12,737 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 17:04:12,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:12,938 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:12,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:12,938 INFO L82 PathProgramCache]: Analyzing trace with hash -866539657, now seen corresponding path program 156 times [2021-06-05 17:04:12,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:12,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168538455] [2021-06-05 17:04:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:12,974 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 17:04:12,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:12,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168538455] [2021-06-05 17:04:12,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168538455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:12,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649356190] [2021-06-05 17:04:12,974 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 17:04:12,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:04:12,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:12,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:12,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:13,091 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 17:04:13,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649356190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:13,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:13,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:04:13,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135030166] [2021-06-05 17:04:13,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:13,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:13,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:13,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:13,092 INFO L87 Difference]: Start difference. First operand 52864 states and 205388 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 17:04:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:14,726 INFO L93 Difference]: Finished difference Result 73622 states and 279382 transitions. [2021-06-05 17:04:14,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:04:14,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 17:04:14,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:14,952 INFO L225 Difference]: With dead ends: 73622 [2021-06-05 17:04:14,952 INFO L226 Difference]: Without dead ends: 73618 [2021-06-05 17:04:14,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 696.6ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:04:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73618 states. [2021-06-05 17:04:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73618 to 52500. [2021-06-05 17:04:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52500 states, 52499 states have (on average 3.8886835939732185) internal successors, (204152), 52499 states have internal predecessors, (204152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52500 states to 52500 states and 204152 transitions. [2021-06-05 17:04:16,552 INFO L78 Accepts]: Start accepts. Automaton has 52500 states and 204152 transitions. Word has length 28 [2021-06-05 17:04:16,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:16,552 INFO L482 AbstractCegarLoop]: Abstraction has 52500 states and 204152 transitions. [2021-06-05 17:04:16,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 17:04:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 52500 states and 204152 transitions. [2021-06-05 17:04:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:16,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:16,632 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 17:04:16,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2021-06-05 17:04:16,837 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:16,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1338899459, now seen corresponding path program 157 times [2021-06-05 17:04:16,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:16,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53612326] [2021-06-05 17:04:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:16,874 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 17:04:16,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:16,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53612326] [2021-06-05 17:04:16,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53612326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:16,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557259318] [2021-06-05 17:04:16,874 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 17:04:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:16,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:16,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:16,987 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 17:04:16,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557259318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:16,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:16,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:04:16,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895361815] [2021-06-05 17:04:16,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:16,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:16,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:16,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:16,988 INFO L87 Difference]: Start difference. First operand 52500 states and 204152 transitions. Second operand has 16 states, 16 states have (on average 2.625) 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 17:04:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:18,308 INFO L93 Difference]: Finished difference Result 67618 states and 258391 transitions. [2021-06-05 17:04:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:04:18,308 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) 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 28 [2021-06-05 17:04:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:18,502 INFO L225 Difference]: With dead ends: 67618 [2021-06-05 17:04:18,503 INFO L226 Difference]: Without dead ends: 67618 [2021-06-05 17:04:18,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 459.0ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:04:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67618 states. [2021-06-05 17:04:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67618 to 52516. [2021-06-05 17:04:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52516 states, 52515 states have (on average 3.8903170522707797) internal successors, (204300), 52515 states have internal predecessors, (204300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:20,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52516 states to 52516 states and 204300 transitions. [2021-06-05 17:04:20,146 INFO L78 Accepts]: Start accepts. Automaton has 52516 states and 204300 transitions. Word has length 28 [2021-06-05 17:04:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:20,146 INFO L482 AbstractCegarLoop]: Abstraction has 52516 states and 204300 transitions. [2021-06-05 17:04:20,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) 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 17:04:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 52516 states and 204300 transitions. [2021-06-05 17:04:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:20,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:20,223 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 17:04:20,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 17:04:20,424 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:20,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1775748157, now seen corresponding path program 158 times [2021-06-05 17:04:20,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:20,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919183457] [2021-06-05 17:04:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:20,463 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 17:04:20,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:20,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919183457] [2021-06-05 17:04:20,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919183457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:20,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372762089] [2021-06-05 17:04:20,463 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 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 17:04:20,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:20,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:20,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:20,573 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 17:04:20,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372762089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:20,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:20,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:04:20,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010866187] [2021-06-05 17:04:20,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:20,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:20,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:20,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:20,574 INFO L87 Difference]: Start difference. First operand 52516 states and 204300 transitions. Second operand has 16 states, 16 states have (on average 2.625) 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 17:04:21,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:21,739 INFO L93 Difference]: Finished difference Result 66808 states and 256162 transitions. [2021-06-05 17:04:21,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:04:21,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) 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 28 [2021-06-05 17:04:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:21,944 INFO L225 Difference]: With dead ends: 66808 [2021-06-05 17:04:21,945 INFO L226 Difference]: Without dead ends: 66796 [2021-06-05 17:04:21,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:04:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66796 states. [2021-06-05 17:04:23,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66796 to 52450. [2021-06-05 17:04:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52450 states, 52449 states have (on average 3.8913420656256554) internal successors, (204097), 52449 states have internal predecessors, (204097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52450 states to 52450 states and 204097 transitions. [2021-06-05 17:04:23,406 INFO L78 Accepts]: Start accepts. Automaton has 52450 states and 204097 transitions. Word has length 28 [2021-06-05 17:04:23,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:23,406 INFO L482 AbstractCegarLoop]: Abstraction has 52450 states and 204097 transitions. [2021-06-05 17:04:23,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) 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 17:04:23,406 INFO L276 IsEmpty]: Start isEmpty. Operand 52450 states and 204097 transitions. [2021-06-05 17:04:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:23,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:23,486 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 17:04:23,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 17:04:23,686 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:23,687 INFO L82 PathProgramCache]: Analyzing trace with hash 517999999, now seen corresponding path program 159 times [2021-06-05 17:04:23,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:23,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336161881] [2021-06-05 17:04:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:23,729 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 17:04:23,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:23,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336161881] [2021-06-05 17:04:23,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336161881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:23,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590273428] [2021-06-05 17:04:23,729 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 17:04:23,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:04:23,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:23,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:23,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:23,843 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 17:04:23,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590273428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:23,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:23,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:04:23,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851485837] [2021-06-05 17:04:23,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:23,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:23,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:23,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:23,844 INFO L87 Difference]: Start difference. First operand 52450 states and 204097 transitions. Second operand has 16 states, 16 states have (on average 2.625) 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 17:04:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:24,509 INFO L93 Difference]: Finished difference Result 57072 states and 219303 transitions. [2021-06-05 17:04:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:04:24,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) 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 28 [2021-06-05 17:04:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:24,677 INFO L225 Difference]: With dead ends: 57072 [2021-06-05 17:04:24,677 INFO L226 Difference]: Without dead ends: 57072 [2021-06-05 17:04:24,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:04:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57072 states. [2021-06-05 17:04:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57072 to 52658. [2021-06-05 17:04:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52658 states, 52657 states have (on average 3.8891125586341797) internal successors, (204789), 52657 states have internal predecessors, (204789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:26,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52658 states to 52658 states and 204789 transitions. [2021-06-05 17:04:26,636 INFO L78 Accepts]: Start accepts. Automaton has 52658 states and 204789 transitions. Word has length 28 [2021-06-05 17:04:26,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:26,636 INFO L482 AbstractCegarLoop]: Abstraction has 52658 states and 204789 transitions. [2021-06-05 17:04:26,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) 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 17:04:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 52658 states and 204789 transitions. [2021-06-05 17:04:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:26,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:26,715 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 17:04:26,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:26,916 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:26,916 INFO L82 PathProgramCache]: Analyzing trace with hash -480567967, now seen corresponding path program 160 times [2021-06-05 17:04:26,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:26,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357003811] [2021-06-05 17:04:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:26,950 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 17:04:26,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:26,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357003811] [2021-06-05 17:04:26,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357003811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:26,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590918218] [2021-06-05 17:04:26,950 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 17:04:26,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:26,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:26,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:26,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:27,054 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 17:04:27,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590918218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:27,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:27,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:04:27,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762502414] [2021-06-05 17:04:27,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:04:27,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:27,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:04:27,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:04:27,055 INFO L87 Difference]: Start difference. First operand 52658 states and 204789 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 17:04:27,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:27,643 INFO L93 Difference]: Finished difference Result 56883 states and 218795 transitions. [2021-06-05 17:04:27,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:04:27,644 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 17:04:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:27,805 INFO L225 Difference]: With dead ends: 56883 [2021-06-05 17:04:27,805 INFO L226 Difference]: Without dead ends: 56879 [2021-06-05 17:04:27,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:04:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56879 states. [2021-06-05 17:04:29,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56879 to 52598. [2021-06-05 17:04:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52598 states, 52597 states have (on average 3.889898663421868) internal successors, (204597), 52597 states have internal predecessors, (204597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:29,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52598 states to 52598 states and 204597 transitions. [2021-06-05 17:04:29,406 INFO L78 Accepts]: Start accepts. Automaton has 52598 states and 204597 transitions. Word has length 28 [2021-06-05 17:04:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:29,406 INFO L482 AbstractCegarLoop]: Abstraction has 52598 states and 204597 transitions. [2021-06-05 17:04:29,406 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 17:04:29,406 INFO L276 IsEmpty]: Start isEmpty. Operand 52598 states and 204597 transitions. [2021-06-05 17:04:29,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:29,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:29,921 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 17:04:30,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 17:04:30,121 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:30,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:30,122 INFO L82 PathProgramCache]: Analyzing trace with hash -510371023, now seen corresponding path program 87 times [2021-06-05 17:04:30,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:30,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578355407] [2021-06-05 17:04:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:30,159 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 17:04:30,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:30,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578355407] [2021-06-05 17:04:30,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578355407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:30,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916682184] [2021-06-05 17:04:30,159 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 17:04:30,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:04:30,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:30,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:30,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:30,235 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 17:04:30,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916682184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:30,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:30,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 17:04:30,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429962008] [2021-06-05 17:04:30,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:04:30,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:30,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:04:30,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:30,236 INFO L87 Difference]: Start difference. First operand 52598 states and 204597 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 17:04:30,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:30,824 INFO L93 Difference]: Finished difference Result 56952 states and 218997 transitions. [2021-06-05 17:04:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:04:30,825 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 17:04:30,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:30,975 INFO L225 Difference]: With dead ends: 56952 [2021-06-05 17:04:30,976 INFO L226 Difference]: Without dead ends: 56952 [2021-06-05 17:04:30,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 208.8ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:04:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56952 states. [2021-06-05 17:04:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56952 to 52718. [2021-06-05 17:04:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52718 states, 52717 states have (on average 3.8880247358537092) internal successors, (204965), 52717 states have internal predecessors, (204965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52718 states to 52718 states and 204965 transitions. [2021-06-05 17:04:32,319 INFO L78 Accepts]: Start accepts. Automaton has 52718 states and 204965 transitions. Word has length 28 [2021-06-05 17:04:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:32,319 INFO L482 AbstractCegarLoop]: Abstraction has 52718 states and 204965 transitions. [2021-06-05 17:04:32,319 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 17:04:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 52718 states and 204965 transitions. [2021-06-05 17:04:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:32,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:32,396 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 17:04:32,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:32,597 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash 394977929, now seen corresponding path program 88 times [2021-06-05 17:04:32,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:32,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194226878] [2021-06-05 17:04:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:32,628 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 17:04:32,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:32,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194226878] [2021-06-05 17:04:32,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194226878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:32,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442628769] [2021-06-05 17:04:32,629 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 17:04:32,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:32,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:32,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:32,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:32,696 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 17:04:32,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442628769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:32,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:32,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 17:04:32,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628658425] [2021-06-05 17:04:32,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:04:32,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:32,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:04:32,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:04:32,697 INFO L87 Difference]: Start difference. First operand 52718 states and 204965 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 17:04:33,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:33,453 INFO L93 Difference]: Finished difference Result 57132 states and 219636 transitions. [2021-06-05 17:04:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:04:33,454 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 17:04:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:33,601 INFO L225 Difference]: With dead ends: 57132 [2021-06-05 17:04:33,602 INFO L226 Difference]: Without dead ends: 57120 [2021-06-05 17:04:33,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:04:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57120 states. [2021-06-05 17:04:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57120 to 52852. [2021-06-05 17:04:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52852 states, 52851 states have (on average 3.8863976083707024) internal successors, (205400), 52851 states have internal predecessors, (205400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52852 states to 52852 states and 205400 transitions. [2021-06-05 17:04:34,976 INFO L78 Accepts]: Start accepts. Automaton has 52852 states and 205400 transitions. Word has length 28 [2021-06-05 17:04:34,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:34,976 INFO L482 AbstractCegarLoop]: Abstraction has 52852 states and 205400 transitions. [2021-06-05 17:04:34,976 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 17:04:34,976 INFO L276 IsEmpty]: Start isEmpty. Operand 52852 states and 205400 transitions. [2021-06-05 17:04:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:35,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:35,054 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 17:04:35,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 17:04:35,255 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:35,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:35,255 INFO L82 PathProgramCache]: Analyzing trace with hash -597515635, now seen corresponding path program 89 times [2021-06-05 17:04:35,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:35,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959001315] [2021-06-05 17:04:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:35,292 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 17:04:35,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:35,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959001315] [2021-06-05 17:04:35,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959001315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:35,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98875938] [2021-06-05 17:04:35,292 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 17:04:35,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:04:35,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:35,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:04:35,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:35,362 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 17:04:35,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98875938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:35,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:35,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 17:04:35,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20013996] [2021-06-05 17:04:35,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:04:35,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:35,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:04:35,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:04:35,363 INFO L87 Difference]: Start difference. First operand 52852 states and 205400 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 17:04:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:35,864 INFO L93 Difference]: Finished difference Result 57096 states and 219552 transitions. [2021-06-05 17:04:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:04:35,865 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 17:04:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:36,015 INFO L225 Difference]: With dead ends: 57096 [2021-06-05 17:04:36,015 INFO L226 Difference]: Without dead ends: 57076 [2021-06-05 17:04:36,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:04:36,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57076 states. [2021-06-05 17:04:37,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57076 to 52852. [2021-06-05 17:04:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52852 states, 52851 states have (on average 3.886321923899264) internal successors, (205396), 52851 states have internal predecessors, (205396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52852 states to 52852 states and 205396 transitions. [2021-06-05 17:04:38,092 INFO L78 Accepts]: Start accepts. Automaton has 52852 states and 205396 transitions. Word has length 28 [2021-06-05 17:04:38,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:38,093 INFO L482 AbstractCegarLoop]: Abstraction has 52852 states and 205396 transitions. [2021-06-05 17:04:38,093 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 17:04:38,093 INFO L276 IsEmpty]: Start isEmpty. Operand 52852 states and 205396 transitions. [2021-06-05 17:04:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:38,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:38,190 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 17:04:38,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 17:04:38,413 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:38,414 INFO L82 PathProgramCache]: Analyzing trace with hash 970045237, now seen corresponding path program 161 times [2021-06-05 17:04:38,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:38,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861862638] [2021-06-05 17:04:38,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:38,448 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 17:04:38,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:38,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861862638] [2021-06-05 17:04:38,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861862638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:38,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632578297] [2021-06-05 17:04:38,448 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 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 17:04:38,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:38,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:38,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:04:38,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:38,534 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 17:04:38,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632578297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:38,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:38,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:04:38,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337100184] [2021-06-05 17:04:38,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:38,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:38,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:38,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:38,535 INFO L87 Difference]: Start difference. First operand 52852 states and 205396 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 17:04:39,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:39,057 INFO L93 Difference]: Finished difference Result 57813 states and 222961 transitions. [2021-06-05 17:04:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:04:39,057 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 17:04:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:39,209 INFO L225 Difference]: With dead ends: 57813 [2021-06-05 17:04:39,210 INFO L226 Difference]: Without dead ends: 57800 [2021-06-05 17:04:39,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:04:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57800 states. [2021-06-05 17:04:40,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57800 to 55585. [2021-06-05 17:04:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55585 states, 55584 states have (on average 3.8929188255613125) internal successors, (216384), 55584 states have internal predecessors, (216384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55585 states to 55585 states and 216384 transitions. [2021-06-05 17:04:40,656 INFO L78 Accepts]: Start accepts. Automaton has 55585 states and 216384 transitions. Word has length 28 [2021-06-05 17:04:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:40,656 INFO L482 AbstractCegarLoop]: Abstraction has 55585 states and 216384 transitions. [2021-06-05 17:04:40,656 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 17:04:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 55585 states and 216384 transitions. [2021-06-05 17:04:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:40,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:40,749 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 17:04:40,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 17:04:40,950 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:40,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:40,950 INFO L82 PathProgramCache]: Analyzing trace with hash 287300907, now seen corresponding path program 162 times [2021-06-05 17:04:40,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:40,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250341947] [2021-06-05 17:04:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:41,302 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 17:04:41,319 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 17:04:41,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:41,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250341947] [2021-06-05 17:04:41,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250341947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:41,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620645673] [2021-06-05 17:04:41,319 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 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 17:04:41,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:04:41,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:41,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:04:41,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:41,434 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 17:04:41,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620645673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:41,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:41,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:04:41,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261515981] [2021-06-05 17:04:41,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:41,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:41,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:41,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:41,435 INFO L87 Difference]: Start difference. First operand 55585 states and 216384 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 17:04:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:41,974 INFO L93 Difference]: Finished difference Result 61541 states and 235789 transitions. [2021-06-05 17:04:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:04:41,975 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 17:04:41,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:42,135 INFO L225 Difference]: With dead ends: 61541 [2021-06-05 17:04:42,135 INFO L226 Difference]: Without dead ends: 61541 [2021-06-05 17:04:42,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:04:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61541 states. [2021-06-05 17:04:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61541 to 49164. [2021-06-05 17:04:43,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49164 states, 49163 states have (on average 3.882350548176474) internal successors, (190868), 49163 states have internal predecessors, (190868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49164 states to 49164 states and 190868 transitions. [2021-06-05 17:04:43,458 INFO L78 Accepts]: Start accepts. Automaton has 49164 states and 190868 transitions. Word has length 28 [2021-06-05 17:04:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:43,458 INFO L482 AbstractCegarLoop]: Abstraction has 49164 states and 190868 transitions. [2021-06-05 17:04:43,458 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 17:04:43,458 INFO L276 IsEmpty]: Start isEmpty. Operand 49164 states and 190868 transitions. [2021-06-05 17:04:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:43,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:43,531 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 17:04:43,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-06-05 17:04:43,731 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:43,731 INFO L82 PathProgramCache]: Analyzing trace with hash -32817557, now seen corresponding path program 163 times [2021-06-05 17:04:43,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:43,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132178983] [2021-06-05 17:04:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:43,765 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 17:04:43,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:43,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132178983] [2021-06-05 17:04:43,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132178983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:43,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381211830] [2021-06-05 17:04:43,766 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 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 17:04:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:04:43,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:43,853 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 17:04:43,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381211830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:43,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:43,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:04:43,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715444497] [2021-06-05 17:04:43,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:43,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:43,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:43,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:43,853 INFO L87 Difference]: Start difference. First operand 49164 states and 190868 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 17:04:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:44,643 INFO L93 Difference]: Finished difference Result 54122 states and 207592 transitions. [2021-06-05 17:04:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:04:44,644 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 17:04:44,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:44,793 INFO L225 Difference]: With dead ends: 54122 [2021-06-05 17:04:44,793 INFO L226 Difference]: Without dead ends: 54122 [2021-06-05 17:04:44,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:04:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54122 states. [2021-06-05 17:04:45,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54122 to 49997. [2021-06-05 17:04:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49997 states, 49996 states have (on average 3.880830466437315) internal successors, (194026), 49996 states have internal predecessors, (194026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49997 states to 49997 states and 194026 transitions. [2021-06-05 17:04:46,110 INFO L78 Accepts]: Start accepts. Automaton has 49997 states and 194026 transitions. Word has length 28 [2021-06-05 17:04:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:46,110 INFO L482 AbstractCegarLoop]: Abstraction has 49997 states and 194026 transitions. [2021-06-05 17:04:46,110 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 17:04:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 49997 states and 194026 transitions. [2021-06-05 17:04:46,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:46,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:46,187 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 17:04:46,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:46,389 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:46,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1041987733, now seen corresponding path program 164 times [2021-06-05 17:04:46,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:46,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772983557] [2021-06-05 17:04:46,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:46,452 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 17:04:46,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:46,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772983557] [2021-06-05 17:04:46,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772983557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:46,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257841277] [2021-06-05 17:04:46,453 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 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 17:04:46,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:46,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:04:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:46,550 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 17:04:46,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257841277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:46,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:46,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:04:46,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505843046] [2021-06-05 17:04:46,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:04:46,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:46,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:04:46,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:04:46,551 INFO L87 Difference]: Start difference. First operand 49997 states and 194026 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 17:04:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:47,041 INFO L93 Difference]: Finished difference Result 51830 states and 200167 transitions. [2021-06-05 17:04:47,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:04:47,042 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 17:04:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:47,182 INFO L225 Difference]: With dead ends: 51830 [2021-06-05 17:04:47,182 INFO L226 Difference]: Without dead ends: 51830 [2021-06-05 17:04:47,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:04:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51830 states. [2021-06-05 17:04:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51830 to 50005. [2021-06-05 17:04:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50005 states, 50004 states have (on average 3.880689544836413) internal successors, (194050), 50004 states have internal predecessors, (194050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50005 states to 50005 states and 194050 transitions. [2021-06-05 17:04:48,541 INFO L78 Accepts]: Start accepts. Automaton has 50005 states and 194050 transitions. Word has length 28 [2021-06-05 17:04:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:48,541 INFO L482 AbstractCegarLoop]: Abstraction has 50005 states and 194050 transitions. [2021-06-05 17:04:48,541 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 17:04:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 50005 states and 194050 transitions. [2021-06-05 17:04:48,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:04:48,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:48,616 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 17:04:48,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:48,819 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:48,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:48,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1139256197, now seen corresponding path program 165 times [2021-06-05 17:04:48,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:48,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036684067] [2021-06-05 17:04:48,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:48,857 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 17:04:48,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:48,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036684067] [2021-06-05 17:04:48,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036684067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:48,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937208711] [2021-06-05 17:04:48,858 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 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 17:04:48,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:48,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:48,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:04:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:48,948 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 17:04:48,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937208711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:48,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:48,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:04:48,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391838790] [2021-06-05 17:04:48,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:04:48,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:48,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:04:48,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:04:48,949 INFO L87 Difference]: Start difference. First operand 50005 states and 194050 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 17:04:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:49,735 INFO L93 Difference]: Finished difference Result 51550 states and 199245 transitions. [2021-06-05 17:04:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:04:49,736 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 17:04:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:49,870 INFO L225 Difference]: With dead ends: 51550 [2021-06-05 17:04:49,870 INFO L226 Difference]: Without dead ends: 51550 [2021-06-05 17:04:49,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:04:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51550 states. [2021-06-05 17:04:50,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51550 to 49899. [2021-06-05 17:04:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49899 states, 49898 states have (on average 3.8804360896228305) internal successors, (193626), 49898 states have internal predecessors, (193626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49899 states to 49899 states and 193626 transitions. [2021-06-05 17:04:51,160 INFO L78 Accepts]: Start accepts. Automaton has 49899 states and 193626 transitions. Word has length 28 [2021-06-05 17:04:51,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:51,160 INFO L482 AbstractCegarLoop]: Abstraction has 49899 states and 193626 transitions. [2021-06-05 17:04:51,160 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 17:04:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 49899 states and 193626 transitions. [2021-06-05 17:04:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:04:51,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:51,240 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 17:04:51,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:51,440 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:51,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash -993746325, now seen corresponding path program 166 times [2021-06-05 17:04:51,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:51,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290102333] [2021-06-05 17:04:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:51,671 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 17:04:51,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:51,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290102333] [2021-06-05 17:04:51,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290102333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:51,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397842334] [2021-06-05 17:04:51,671 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 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 17:04:51,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:04:51,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:51,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:51,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:51,967 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 25 treesize of output 13 [2021-06-05 17:04:51,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:51,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:51,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:51,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:04:51,988 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 17:04:51,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397842334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:51,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:51,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:04:51,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004875322] [2021-06-05 17:04:51,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:04:51,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:51,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:04:51,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:04:51,989 INFO L87 Difference]: Start difference. First operand 49899 states and 193626 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:53,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:53,519 INFO L93 Difference]: Finished difference Result 53034 states and 202923 transitions. [2021-06-05 17:04:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:04:53,519 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 17:04:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:53,648 INFO L225 Difference]: With dead ends: 53034 [2021-06-05 17:04:53,649 INFO L226 Difference]: Without dead ends: 53004 [2021-06-05 17:04:53,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 849.2ms TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:04:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53004 states. [2021-06-05 17:04:54,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53004 to 49956. [2021-06-05 17:04:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49956 states, 49955 states have (on average 3.8796717045340805) internal successors, (193809), 49955 states have internal predecessors, (193809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49956 states to 49956 states and 193809 transitions. [2021-06-05 17:04:54,930 INFO L78 Accepts]: Start accepts. Automaton has 49956 states and 193809 transitions. Word has length 30 [2021-06-05 17:04:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:54,930 INFO L482 AbstractCegarLoop]: Abstraction has 49956 states and 193809 transitions. [2021-06-05 17:04:54,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 49956 states and 193809 transitions. [2021-06-05 17:04:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:04:55,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:55,011 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 17:04:55,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:55,211 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:55,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:55,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1272822955, now seen corresponding path program 167 times [2021-06-05 17:04:55,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:55,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912871688] [2021-06-05 17:04:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:55,449 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 17:04:55,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:55,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912871688] [2021-06-05 17:04:55,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912871688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:55,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963017313] [2021-06-05 17:04:55,450 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 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 17:04:55,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:04:55,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:55,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:04:55,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:55,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:55,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:55,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:55,788 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 25 treesize of output 13 [2021-06-05 17:04:55,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:55,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:55,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:55,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:3 [2021-06-05 17:04:55,820 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 17:04:55,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963017313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:55,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:55,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:04:55,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823557729] [2021-06-05 17:04:55,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:04:55,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:55,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:04:55,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:04:55,821 INFO L87 Difference]: Start difference. First operand 49956 states and 193809 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 17:04:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:57,709 INFO L93 Difference]: Finished difference Result 53044 states and 202956 transitions. [2021-06-05 17:04:57,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:04:57,710 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-06-05 17:04:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:57,849 INFO L225 Difference]: With dead ends: 53044 [2021-06-05 17:04:57,849 INFO L226 Difference]: Without dead ends: 53029 [2021-06-05 17:04:57,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1169.3ms TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:04:57,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53029 states. [2021-06-05 17:04:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53029 to 49948. [2021-06-05 17:04:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49948 states, 49947 states have (on average 3.8798726650249264) internal successors, (193788), 49947 states have internal predecessors, (193788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49948 states to 49948 states and 193788 transitions. [2021-06-05 17:04:59,097 INFO L78 Accepts]: Start accepts. Automaton has 49948 states and 193788 transitions. Word has length 30 [2021-06-05 17:04:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:59,097 INFO L482 AbstractCegarLoop]: Abstraction has 49948 states and 193788 transitions. [2021-06-05 17:04:59,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 17:04:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 49948 states and 193788 transitions. [2021-06-05 17:04:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:04:59,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:59,170 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 17:04:59,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:59,373 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:59,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1430715033, now seen corresponding path program 168 times [2021-06-05 17:04:59,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:59,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263318668] [2021-06-05 17:04:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:59,581 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 17:04:59,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:59,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263318668] [2021-06-05 17:04:59,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263318668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:59,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176698965] [2021-06-05 17:04:59,582 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 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 17:04:59,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:04:59,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:04:59,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:59,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:59,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:59,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:59,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:59,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:59,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:04:59,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:59,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:59,852 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 17:04:59,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 17:04:59,869 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 17:04:59,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176698965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:59,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:59,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:04:59,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508816114] [2021-06-05 17:04:59,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:04:59,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:59,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:04:59,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:04:59,870 INFO L87 Difference]: Start difference. First operand 49948 states and 193788 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:01,549 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 17:05:02,424 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-05 17:05:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:03,779 INFO L93 Difference]: Finished difference Result 63314 states and 238515 transitions. [2021-06-05 17:05:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:05:03,780 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 17:05:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:03,953 INFO L225 Difference]: With dead ends: 63314 [2021-06-05 17:05:03,954 INFO L226 Difference]: Without dead ends: 63299 [2021-06-05 17:05:03,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 3183.3ms TimeCoverageRelationStatistics Valid=514, Invalid=3026, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:05:04,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63299 states. [2021-06-05 17:05:05,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63299 to 50006. [2021-06-05 17:05:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50006 states, 50005 states have (on average 3.8794120587941205) internal successors, (193990), 50005 states have internal predecessors, (193990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50006 states to 50006 states and 193990 transitions. [2021-06-05 17:05:05,564 INFO L78 Accepts]: Start accepts. Automaton has 50006 states and 193990 transitions. Word has length 30 [2021-06-05 17:05:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:05,564 INFO L482 AbstractCegarLoop]: Abstraction has 50006 states and 193990 transitions. [2021-06-05 17:05:05,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 50006 states and 193990 transitions. [2021-06-05 17:05:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:05,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:05,656 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 17:05:05,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 17:05:05,861 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:05,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:05,861 INFO L82 PathProgramCache]: Analyzing trace with hash -625667857, now seen corresponding path program 169 times [2021-06-05 17:05:05,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:05,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17614034] [2021-06-05 17:05:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:06,099 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 17:05:06,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:06,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17614034] [2021-06-05 17:05:06,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17614034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:06,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644589768] [2021-06-05 17:05:06,100 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:06,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:05:06,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:06,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:06,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:06,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:06,361 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 25 treesize of output 13 [2021-06-05 17:05:06,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:06,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:06,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:06,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:05:06,384 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 17:05:06,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644589768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:06,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:06,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:05:06,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993015087] [2021-06-05 17:05:06,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:05:06,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:06,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:05:06,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:05:06,385 INFO L87 Difference]: Start difference. First operand 50006 states and 193990 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:05:07,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:07,953 INFO L93 Difference]: Finished difference Result 55413 states and 210324 transitions. [2021-06-05 17:05:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:05:07,953 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 30 [2021-06-05 17:05:07,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:08,122 INFO L225 Difference]: With dead ends: 55413 [2021-06-05 17:05:08,123 INFO L226 Difference]: Without dead ends: 55398 [2021-06-05 17:05:08,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1037.2ms TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:05:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55398 states. [2021-06-05 17:05:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55398 to 50051. [2021-06-05 17:05:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50051 states, 50050 states have (on average 3.878981018981019) internal successors, (194143), 50050 states have internal predecessors, (194143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50051 states to 50051 states and 194143 transitions. [2021-06-05 17:05:09,703 INFO L78 Accepts]: Start accepts. Automaton has 50051 states and 194143 transitions. Word has length 30 [2021-06-05 17:05:09,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:09,703 INFO L482 AbstractCegarLoop]: Abstraction has 50051 states and 194143 transitions. [2021-06-05 17:05:09,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:05:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 50051 states and 194143 transitions. [2021-06-05 17:05:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:09,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:09,791 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 17:05:10,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-05 17:05:10,001 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:10,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1938529707, now seen corresponding path program 170 times [2021-06-05 17:05:10,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:10,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97632548] [2021-06-05 17:05:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:10,275 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 17:05:10,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:10,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97632548] [2021-06-05 17:05:10,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97632548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:10,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828820623] [2021-06-05 17:05:10,276 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:10,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:10,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:10,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:05:10,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:10,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:10,571 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 17:05:10,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:10,646 INFO L628 ElimStorePlain]: treesize reduction 87, result has 40.0 percent of original size [2021-06-05 17:05:10,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 17:05:10,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:84 [2021-06-05 17:05:10,750 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 17:05:10,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828820623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:10,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:10,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 17:05:10,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119502146] [2021-06-05 17:05:10,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:05:10,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:10,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:05:10,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:05:10,751 INFO L87 Difference]: Start difference. First operand 50051 states and 194143 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:12,929 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 17:05:13,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:13,394 INFO L93 Difference]: Finished difference Result 53236 states and 203549 transitions. [2021-06-05 17:05:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:05:13,394 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 17:05:13,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:13,540 INFO L225 Difference]: With dead ends: 53236 [2021-06-05 17:05:13,540 INFO L226 Difference]: Without dead ends: 53221 [2021-06-05 17:05:13,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 2032.5ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:05:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53221 states. [2021-06-05 17:05:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53221 to 50057. [2021-06-05 17:05:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50057 states, 50056 states have (on average 3.8790155026370465) internal successors, (194168), 50056 states have internal predecessors, (194168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50057 states to 50057 states and 194168 transitions. [2021-06-05 17:05:14,975 INFO L78 Accepts]: Start accepts. Automaton has 50057 states and 194168 transitions. Word has length 30 [2021-06-05 17:05:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:14,975 INFO L482 AbstractCegarLoop]: Abstraction has 50057 states and 194168 transitions. [2021-06-05 17:05:14,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:14,975 INFO L276 IsEmpty]: Start isEmpty. Operand 50057 states and 194168 transitions. [2021-06-05 17:05:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:15,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:15,058 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 17:05:15,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:15,258 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:15,259 INFO L82 PathProgramCache]: Analyzing trace with hash -806056025, now seen corresponding path program 171 times [2021-06-05 17:05:15,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:15,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137099371] [2021-06-05 17:05:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:15,474 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 17:05:15,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:15,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137099371] [2021-06-05 17:05:15,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137099371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:15,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794162266] [2021-06-05 17:05:15,475 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:15,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:05:15,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:15,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:05:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:15,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:15,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:15,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:15,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 27 treesize of output 59 [2021-06-05 17:05:15,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:16,036 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-06-05 17:05:16,036 INFO L628 ElimStorePlain]: treesize reduction 169, result has 26.5 percent of original size [2021-06-05 17:05:16,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:16,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:87 [2021-06-05 17:05:16,181 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 17:05:16,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794162266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:16,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:16,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-06-05 17:05:16,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363635750] [2021-06-05 17:05:16,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 17:05:16,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:16,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 17:05:16,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:05:16,182 INFO L87 Difference]: Start difference. First operand 50057 states and 194168 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:17,451 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 17:05:17,700 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-06-05 17:05:18,573 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2021-06-05 17:05:18,936 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2021-06-05 17:05:19,301 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2021-06-05 17:05:19,528 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2021-06-05 17:05:19,778 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-06-05 17:05:20,249 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-06-05 17:05:20,787 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-06-05 17:05:21,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:21,917 INFO L93 Difference]: Finished difference Result 71077 states and 266109 transitions. [2021-06-05 17:05:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 17:05:21,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 17:05:21,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:22,106 INFO L225 Difference]: With dead ends: 71077 [2021-06-05 17:05:22,107 INFO L226 Difference]: Without dead ends: 71047 [2021-06-05 17:05:22,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 4562.0ms TimeCoverageRelationStatistics Valid=725, Invalid=5281, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 17:05:22,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71047 states. [2021-06-05 17:05:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71047 to 50086. [2021-06-05 17:05:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50086 states, 50085 states have (on average 3.8791055206149547) internal successors, (194285), 50085 states have internal predecessors, (194285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50086 states to 50086 states and 194285 transitions. [2021-06-05 17:05:23,714 INFO L78 Accepts]: Start accepts. Automaton has 50086 states and 194285 transitions. Word has length 30 [2021-06-05 17:05:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:23,714 INFO L482 AbstractCegarLoop]: Abstraction has 50086 states and 194285 transitions. [2021-06-05 17:05:23,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 50086 states and 194285 transitions. [2021-06-05 17:05:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:23,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:23,793 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 17:05:23,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 17:05:23,994 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:23,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:23,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1782374869, now seen corresponding path program 172 times [2021-06-05 17:05:23,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:23,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265196626] [2021-06-05 17:05:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:24,159 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 17:05:24,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:24,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265196626] [2021-06-05 17:05:24,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265196626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:24,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585119866] [2021-06-05 17:05:24,159 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:24,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:24,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:24,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:05:24,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:24,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:24,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:24,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:24,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:24,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:24,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:24,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:05:24,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:24,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:24,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:24,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:05:24,517 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 17:05:24,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585119866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:24,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:24,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:05:24,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795623990] [2021-06-05 17:05:24,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:05:24,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:24,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:05:24,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:05:24,518 INFO L87 Difference]: Start difference. First operand 50086 states and 194285 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:25,598 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-06-05 17:05:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:28,925 INFO L93 Difference]: Finished difference Result 84102 states and 311805 transitions. [2021-06-05 17:05:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:05:28,925 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:05:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:29,121 INFO L225 Difference]: With dead ends: 84102 [2021-06-05 17:05:29,122 INFO L226 Difference]: Without dead ends: 84072 [2021-06-05 17:05:29,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 3072.1ms TimeCoverageRelationStatistics Valid=535, Invalid=4435, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:05:29,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84072 states. [2021-06-05 17:05:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84072 to 50147. [2021-06-05 17:05:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50147 states, 50146 states have (on average 3.8789534559087464) internal successors, (194514), 50146 states have internal predecessors, (194514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50147 states to 50147 states and 194514 transitions. [2021-06-05 17:05:30,610 INFO L78 Accepts]: Start accepts. Automaton has 50147 states and 194514 transitions. Word has length 30 [2021-06-05 17:05:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:30,610 INFO L482 AbstractCegarLoop]: Abstraction has 50147 states and 194514 transitions. [2021-06-05 17:05:30,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 50147 states and 194514 transitions. [2021-06-05 17:05:30,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:30,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:30,693 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 17:05:30,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:30,893 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:30,894 INFO L82 PathProgramCache]: Analyzing trace with hash -688283281, now seen corresponding path program 173 times [2021-06-05 17:05:30,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:30,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385332205] [2021-06-05 17:05:30,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:31,047 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 17:05:31,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:31,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385332205] [2021-06-05 17:05:31,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385332205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:31,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652674954] [2021-06-05 17:05:31,047 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:31,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:05:31,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:31,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:05:31,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:31,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:31,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:31,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:31,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:31,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:31,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:31,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:31,321 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 17:05:31,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 17:05:31,341 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 17:05:31,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652674954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:31,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:31,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:05:31,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930198074] [2021-06-05 17:05:31,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:05:31,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:31,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:05:31,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:05:31,342 INFO L87 Difference]: Start difference. First operand 50147 states and 194514 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:32,487 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 17:05:34,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:34,584 INFO L93 Difference]: Finished difference Result 83268 states and 309473 transitions. [2021-06-05 17:05:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:05:34,584 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:05:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:34,793 INFO L225 Difference]: With dead ends: 83268 [2021-06-05 17:05:34,793 INFO L226 Difference]: Without dead ends: 83253 [2021-06-05 17:05:34,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 2296.1ms TimeCoverageRelationStatistics Valid=413, Invalid=3493, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:05:35,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83253 states. [2021-06-05 17:05:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83253 to 50159. [2021-06-05 17:05:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50159 states, 50158 states have (on average 3.8786634235814823) internal successors, (194546), 50158 states have internal predecessors, (194546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50159 states to 50159 states and 194546 transitions. [2021-06-05 17:05:36,557 INFO L78 Accepts]: Start accepts. Automaton has 50159 states and 194546 transitions. Word has length 30 [2021-06-05 17:05:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:36,557 INFO L482 AbstractCegarLoop]: Abstraction has 50159 states and 194546 transitions. [2021-06-05 17:05:36,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 50159 states and 194546 transitions. [2021-06-05 17:05:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:36,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:36,638 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, 1, 1] [2021-06-05 17:05:36,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:36,839 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:36,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:36,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1460513255, now seen corresponding path program 174 times [2021-06-05 17:05:36,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:36,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657629224] [2021-06-05 17:05:36,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:37,045 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 17:05:37,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:37,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657629224] [2021-06-05 17:05:37,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657629224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:37,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197335852] [2021-06-05 17:05:37,045 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:37,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:05:37,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:37,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:05:37,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:37,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:37,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:37,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:37,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:37,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:37,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:37,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:37,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:37,326 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 17:05:37,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 17:05:37,345 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 17:05:37,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197335852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:37,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:37,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:05:37,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353365701] [2021-06-05 17:05:37,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:05:37,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:37,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:05:37,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:05:37,346 INFO L87 Difference]: Start difference. First operand 50159 states and 194546 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:41,341 INFO L93 Difference]: Finished difference Result 94075 states and 345871 transitions. [2021-06-05 17:05:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 17:05:41,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:05:41,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:41,574 INFO L225 Difference]: With dead ends: 94075 [2021-06-05 17:05:41,575 INFO L226 Difference]: Without dead ends: 94045 [2021-06-05 17:05:41,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 2722.1ms TimeCoverageRelationStatistics Valid=621, Invalid=4781, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 17:05:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94045 states. [2021-06-05 17:05:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94045 to 50168. [2021-06-05 17:05:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50168 states, 50167 states have (on average 3.8787449917276295) internal successors, (194585), 50167 states have internal predecessors, (194585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50168 states to 50168 states and 194585 transitions. [2021-06-05 17:05:43,289 INFO L78 Accepts]: Start accepts. Automaton has 50168 states and 194585 transitions. Word has length 30 [2021-06-05 17:05:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:43,289 INFO L482 AbstractCegarLoop]: Abstraction has 50168 states and 194585 transitions. [2021-06-05 17:05:43,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 50168 states and 194585 transitions. [2021-06-05 17:05:43,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:43,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:43,370 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:43,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 17:05:43,571 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:43,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:43,571 INFO L82 PathProgramCache]: Analyzing trace with hash -450848413, now seen corresponding path program 90 times [2021-06-05 17:05:43,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:43,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217895460] [2021-06-05 17:05:43,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:43,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:43,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217895460] [2021-06-05 17:05:43,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217895460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:43,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419267284] [2021-06-05 17:05:43,974 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:43,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:05:43,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:44,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:05:44,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:44,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:44,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:44,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:44,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:44,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:44,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:44,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:44,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:05:44,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:44,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:44,226 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 17:05:44,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-06-05 17:05:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:44,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419267284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:44,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:44,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:05:44,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472679212] [2021-06-05 17:05:44,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:05:44,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:44,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:05:44,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:05:44,243 INFO L87 Difference]: Start difference. First operand 50168 states and 194585 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:46,001 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-06-05 17:05:46,690 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-06-05 17:05:46,814 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 17:05:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:49,032 INFO L93 Difference]: Finished difference Result 63519 states and 239225 transitions. [2021-06-05 17:05:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:05:49,033 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:05:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:49,179 INFO L225 Difference]: With dead ends: 63519 [2021-06-05 17:05:49,179 INFO L226 Difference]: Without dead ends: 63504 [2021-06-05 17:05:49,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 3962.4ms TimeCoverageRelationStatistics Valid=569, Invalid=3591, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:05:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63504 states. [2021-06-05 17:05:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63504 to 50203. [2021-06-05 17:05:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50203 states, 50202 states have (on average 3.8777538743476354) internal successors, (194671), 50202 states have internal predecessors, (194671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50203 states to 50203 states and 194671 transitions. [2021-06-05 17:05:50,468 INFO L78 Accepts]: Start accepts. Automaton has 50203 states and 194671 transitions. Word has length 30 [2021-06-05 17:05:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:50,468 INFO L482 AbstractCegarLoop]: Abstraction has 50203 states and 194671 transitions. [2021-06-05 17:05:50,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:50,468 INFO L276 IsEmpty]: Start isEmpty. Operand 50203 states and 194671 transitions. [2021-06-05 17:05:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:50,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:50,552 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 17:05:50,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 17:05:50,762 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash 878036001, now seen corresponding path program 175 times [2021-06-05 17:05:50,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:50,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404548002] [2021-06-05 17:05:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:50,918 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 17:05:50,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:50,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404548002] [2021-06-05 17:05:50,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404548002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:50,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380852605] [2021-06-05 17:05:50,919 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:05:50,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:51,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:51,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:51,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:51,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:51,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:51,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:51,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:05:51,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:51,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:51,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:51,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:05:51,317 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 17:05:51,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380852605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:51,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:51,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:05:51,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114117388] [2021-06-05 17:05:51,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:05:51,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:51,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:05:51,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:05:51,318 INFO L87 Difference]: Start difference. First operand 50203 states and 194671 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 17:05:53,323 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 17:05:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:55,100 INFO L93 Difference]: Finished difference Result 83399 states and 309818 transitions. [2021-06-05 17:05:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:05:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-06-05 17:05:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:55,306 INFO L225 Difference]: With dead ends: 83399 [2021-06-05 17:05:55,307 INFO L226 Difference]: Without dead ends: 83384 [2021-06-05 17:05:55,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2623.1ms TimeCoverageRelationStatistics Valid=468, Invalid=4088, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:05:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83384 states. [2021-06-05 17:05:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83384 to 50245. [2021-06-05 17:05:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50245 states, 50244 states have (on average 3.877517713557838) internal successors, (194822), 50244 states have internal predecessors, (194822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:57,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50245 states to 50245 states and 194822 transitions. [2021-06-05 17:05:57,069 INFO L78 Accepts]: Start accepts. Automaton has 50245 states and 194822 transitions. Word has length 30 [2021-06-05 17:05:57,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:57,069 INFO L482 AbstractCegarLoop]: Abstraction has 50245 states and 194822 transitions. [2021-06-05 17:05:57,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 17:05:57,069 INFO L276 IsEmpty]: Start isEmpty. Operand 50245 states and 194822 transitions. [2021-06-05 17:05:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:05:57,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:57,149 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 17:05:57,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 17:05:57,349 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:57,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:57,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2084417043, now seen corresponding path program 176 times [2021-06-05 17:05:57,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:57,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847964527] [2021-06-05 17:05:57,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:57,546 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 17:05:57,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:57,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847964527] [2021-06-05 17:05:57,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847964527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:57,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489070115] [2021-06-05 17:05:57,547 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:57,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:57,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:57,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:05:57,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:57,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:57,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:57,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:57,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:57,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:57,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:05:57,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:57,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:57,772 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 17:05:57,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 17:05:57,787 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 17:05:57,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489070115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:57,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:57,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 17:05:57,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891174493] [2021-06-05 17:05:57,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:05:57,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:57,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:05:57,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:05:57,788 INFO L87 Difference]: Start difference. First operand 50245 states and 194822 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:59,409 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-05 17:06:00,053 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 17:06:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:01,353 INFO L93 Difference]: Finished difference Result 71516 states and 267553 transitions. [2021-06-05 17:06:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 17:06:01,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 17:06:01,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:01,529 INFO L225 Difference]: With dead ends: 71516 [2021-06-05 17:06:01,529 INFO L226 Difference]: Without dead ends: 71501 [2021-06-05 17:06:01,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 2762.0ms TimeCoverageRelationStatistics Valid=535, Invalid=3497, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:06:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71501 states. [2021-06-05 17:06:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71501 to 50245. [2021-06-05 17:06:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50245 states, 50244 states have (on average 3.877517713557838) internal successors, (194822), 50244 states have internal predecessors, (194822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:02,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50245 states to 50245 states and 194822 transitions. [2021-06-05 17:06:02,833 INFO L78 Accepts]: Start accepts. Automaton has 50245 states and 194822 transitions. Word has length 30 [2021-06-05 17:06:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:02,833 INFO L482 AbstractCegarLoop]: Abstraction has 50245 states and 194822 transitions. [2021-06-05 17:06:02,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:02,834 INFO L276 IsEmpty]: Start isEmpty. Operand 50245 states and 194822 transitions. [2021-06-05 17:06:02,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:02,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:02,911 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 17:06:03,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 17:06:03,112 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:03,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1108098199, now seen corresponding path program 177 times [2021-06-05 17:06:03,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:03,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895629589] [2021-06-05 17:06:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:03,270 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 17:06:03,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:03,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895629589] [2021-06-05 17:06:03,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895629589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:03,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825168577] [2021-06-05 17:06:03,270 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:03,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:06:03,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:03,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:06:03,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:03,706 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-06-05 17:06:03,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:03,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:03,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 85 [2021-06-05 17:06:04,239 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 17:06:04,416 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-06-05 17:06:04,416 INFO L628 ElimStorePlain]: treesize reduction 62, result has 77.0 percent of original size [2021-06-05 17:06:04,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 17:06:04,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:2120 [2021-06-05 17:06:04,942 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 179 [2021-06-05 17:06:05,475 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 54 [2021-06-05 17:06:05,645 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 17:06:05,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825168577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:05,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:05,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 17:06:05,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282715295] [2021-06-05 17:06:05,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:06:05,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:05,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:06:05,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:06:05,646 INFO L87 Difference]: Start difference. First operand 50245 states and 194822 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:06,844 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 17:06:10,941 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-05 17:06:11,127 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-06-05 17:06:11,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:11,481 INFO L93 Difference]: Finished difference Result 84175 states and 312104 transitions. [2021-06-05 17:06:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 17:06:11,482 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:06:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:11,829 INFO L225 Difference]: With dead ends: 84175 [2021-06-05 17:06:11,830 INFO L226 Difference]: Without dead ends: 84145 [2021-06-05 17:06:11,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 4422.0ms TimeCoverageRelationStatistics Valid=599, Invalid=6043, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 17:06:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84145 states. [2021-06-05 17:06:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84145 to 50231. [2021-06-05 17:06:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50231 states, 50230 states have (on average 3.8775233923949832) internal successors, (194768), 50230 states have internal predecessors, (194768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:13,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50231 states to 50231 states and 194768 transitions. [2021-06-05 17:06:13,316 INFO L78 Accepts]: Start accepts. Automaton has 50231 states and 194768 transitions. Word has length 30 [2021-06-05 17:06:13,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:13,316 INFO L482 AbstractCegarLoop]: Abstraction has 50231 states and 194768 transitions. [2021-06-05 17:06:13,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:13,316 INFO L276 IsEmpty]: Start isEmpty. Operand 50231 states and 194768 transitions. [2021-06-05 17:06:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:13,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:13,394 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 17:06:13,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-06-05 17:06:13,595 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:13,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:13,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1339274201, now seen corresponding path program 178 times [2021-06-05 17:06:13,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:13,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024001669] [2021-06-05 17:06:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:13,846 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 17:06:13,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024001669] [2021-06-05 17:06:13,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024001669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867573836] [2021-06-05 17:06:13,846 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:13,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:13,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:13,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:06:13,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:14,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:14,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:14,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:14,115 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 25 treesize of output 13 [2021-06-05 17:06:14,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:14,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:14,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:14,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:06:14,146 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 17:06:14,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867573836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:14,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:14,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:06:14,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71448623] [2021-06-05 17:06:14,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:06:14,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:14,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:06:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:06:14,147 INFO L87 Difference]: Start difference. First operand 50231 states and 194768 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:15,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:15,884 INFO L93 Difference]: Finished difference Result 73610 states and 278935 transitions. [2021-06-05 17:06:15,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:06:15,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 17:06:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:16,066 INFO L225 Difference]: With dead ends: 73610 [2021-06-05 17:06:16,066 INFO L226 Difference]: Without dead ends: 73580 [2021-06-05 17:06:16,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 976.7ms TimeCoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:06:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73580 states. [2021-06-05 17:06:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73580 to 50288. [2021-06-05 17:06:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50288 states, 50287 states have (on average 3.876946328076839) internal successors, (194960), 50287 states have internal predecessors, (194960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:17,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50288 states to 50288 states and 194960 transitions. [2021-06-05 17:06:17,586 INFO L78 Accepts]: Start accepts. Automaton has 50288 states and 194960 transitions. Word has length 30 [2021-06-05 17:06:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:17,587 INFO L482 AbstractCegarLoop]: Abstraction has 50288 states and 194960 transitions. [2021-06-05 17:06:17,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:17,587 INFO L276 IsEmpty]: Start isEmpty. Operand 50288 states and 194960 transitions. [2021-06-05 17:06:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:17,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:17,669 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 17:06:17,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 17:06:17,870 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:17,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:17,870 INFO L82 PathProgramCache]: Analyzing trace with hash 927295079, now seen corresponding path program 179 times [2021-06-05 17:06:17,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:17,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215959443] [2021-06-05 17:06:17,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:18,145 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 17:06:18,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:18,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215959443] [2021-06-05 17:06:18,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215959443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:18,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207334582] [2021-06-05 17:06:18,145 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:18,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:06:18,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:18,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:06:18,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:18,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:18,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:18,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:18,444 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 25 treesize of output 13 [2021-06-05 17:06:18,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:18,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:18,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:18,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:3 [2021-06-05 17:06:18,467 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 17:06:18,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207334582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:18,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:18,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:06:18,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036297710] [2021-06-05 17:06:18,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:06:18,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:18,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:06:18,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:06:18,468 INFO L87 Difference]: Start difference. First operand 50288 states and 194960 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 17:06:21,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:21,155 INFO L93 Difference]: Finished difference Result 73555 states and 278809 transitions. [2021-06-05 17:06:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:06:21,156 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-06-05 17:06:21,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:21,344 INFO L225 Difference]: With dead ends: 73555 [2021-06-05 17:06:21,345 INFO L226 Difference]: Without dead ends: 73540 [2021-06-05 17:06:21,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1851.0ms TimeCoverageRelationStatistics Valid=440, Invalid=2640, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:06:21,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73540 states. [2021-06-05 17:06:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73540 to 50280. [2021-06-05 17:06:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50280 states, 50279 states have (on average 3.8771455279540166) internal successors, (194939), 50279 states have internal predecessors, (194939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50280 states to 50280 states and 194939 transitions. [2021-06-05 17:06:23,085 INFO L78 Accepts]: Start accepts. Automaton has 50280 states and 194939 transitions. Word has length 30 [2021-06-05 17:06:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:23,085 INFO L482 AbstractCegarLoop]: Abstraction has 50280 states and 194939 transitions. [2021-06-05 17:06:23,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 17:06:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 50280 states and 194939 transitions. [2021-06-05 17:06:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:23,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:23,183 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 17:06:23,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable662,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:23,383 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:23,383 INFO L82 PathProgramCache]: Analyzing trace with hash -971195733, now seen corresponding path program 180 times [2021-06-05 17:06:23,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:23,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647609199] [2021-06-05 17:06:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:23,650 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 17:06:23,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:23,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647609199] [2021-06-05 17:06:23,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647609199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:23,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94868420] [2021-06-05 17:06:23,651 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:23,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:06:23,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:23,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:06:23,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:23,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:23,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:23,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:23,897 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 25 treesize of output 13 [2021-06-05 17:06:23,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:23,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:23,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:23,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:06:23,926 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 17:06:23,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94868420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:23,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:23,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:06:23,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904540439] [2021-06-05 17:06:23,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:06:23,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:06:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:06:23,927 INFO L87 Difference]: Start difference. First operand 50280 states and 194939 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:06:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:25,958 INFO L93 Difference]: Finished difference Result 76864 states and 288901 transitions. [2021-06-05 17:06:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:06:25,958 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 30 [2021-06-05 17:06:25,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:26,151 INFO L225 Difference]: With dead ends: 76864 [2021-06-05 17:06:26,151 INFO L226 Difference]: Without dead ends: 76849 [2021-06-05 17:06:26,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1275.3ms TimeCoverageRelationStatistics Valid=517, Invalid=2345, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:06:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76849 states. [2021-06-05 17:06:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76849 to 50282. [2021-06-05 17:06:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50282 states, 50281 states have (on average 3.8772498558103456) internal successors, (194952), 50281 states have internal predecessors, (194952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50282 states to 50282 states and 194952 transitions. [2021-06-05 17:06:27,602 INFO L78 Accepts]: Start accepts. Automaton has 50282 states and 194952 transitions. Word has length 30 [2021-06-05 17:06:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:27,602 INFO L482 AbstractCegarLoop]: Abstraction has 50282 states and 194952 transitions. [2021-06-05 17:06:27,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:06:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand 50282 states and 194952 transitions. [2021-06-05 17:06:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:27,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:27,684 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 17:06:27,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 17:06:27,885 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:27,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:27,885 INFO L82 PathProgramCache]: Analyzing trace with hash -397133013, now seen corresponding path program 181 times [2021-06-05 17:06:27,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:27,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940125874] [2021-06-05 17:06:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:28,049 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 17:06:28,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:28,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940125874] [2021-06-05 17:06:28,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940125874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:28,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176647561] [2021-06-05 17:06:28,049 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:28,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:06:28,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:28,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:28,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:28,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:28,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:28,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:28,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:28,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:06:28,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:28,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:28,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:28,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:06:28,433 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 17:06:28,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176647561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:28,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:28,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:06:28,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351666509] [2021-06-05 17:06:28,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:06:28,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:28,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:06:28,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:06:28,434 INFO L87 Difference]: Start difference. First operand 50282 states and 194952 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:30,170 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 17:06:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:34,154 INFO L93 Difference]: Finished difference Result 91774 states and 339295 transitions. [2021-06-05 17:06:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:06:34,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:06:34,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:34,392 INFO L225 Difference]: With dead ends: 91774 [2021-06-05 17:06:34,392 INFO L226 Difference]: Without dead ends: 91744 [2021-06-05 17:06:34,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 3617.2ms TimeCoverageRelationStatistics Valid=655, Invalid=5665, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 17:06:34,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91744 states. [2021-06-05 17:06:35,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91744 to 50413. [2021-06-05 17:06:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50413 states, 50412 states have (on average 3.876001745616123) internal successors, (195397), 50412 states have internal predecessors, (195397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50413 states to 50413 states and 195397 transitions. [2021-06-05 17:06:36,020 INFO L78 Accepts]: Start accepts. Automaton has 50413 states and 195397 transitions. Word has length 30 [2021-06-05 17:06:36,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:36,020 INFO L482 AbstractCegarLoop]: Abstraction has 50413 states and 195397 transitions. [2021-06-05 17:06:36,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:36,020 INFO L276 IsEmpty]: Start isEmpty. Operand 50413 states and 195397 transitions. [2021-06-05 17:06:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:36,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:36,104 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 17:06:36,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 17:06:36,305 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:36,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1812767055, now seen corresponding path program 182 times [2021-06-05 17:06:36,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:36,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198507310] [2021-06-05 17:06:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:36,548 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 17:06:36,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:36,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198507310] [2021-06-05 17:06:36,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198507310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:36,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733995054] [2021-06-05 17:06:36,549 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:36,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:36,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:36,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:06:36,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:36,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:36,853 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 25 treesize of output 53 [2021-06-05 17:06:36,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:36,954 INFO L628 ElimStorePlain]: treesize reduction 150, result has 31.5 percent of original size [2021-06-05 17:06:37,249 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 17:06:37,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:06:37,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:88 [2021-06-05 17:06:37,347 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 17:06:37,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733995054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:37,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:37,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 17:06:37,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788486901] [2021-06-05 17:06:37,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:06:37,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:06:37,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:06:37,348 INFO L87 Difference]: Start difference. First operand 50413 states and 195397 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:39,928 INFO L93 Difference]: Finished difference Result 72565 states and 275989 transitions. [2021-06-05 17:06:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:06:39,928 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 17:06:39,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:40,371 INFO L225 Difference]: With dead ends: 72565 [2021-06-05 17:06:40,371 INFO L226 Difference]: Without dead ends: 72535 [2021-06-05 17:06:40,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1831.1ms TimeCoverageRelationStatistics Valid=404, Invalid=2352, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:06:40,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72535 states. [2021-06-05 17:06:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72535 to 50413. [2021-06-05 17:06:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50413 states, 50412 states have (on average 3.876001745616123) internal successors, (195397), 50412 states have internal predecessors, (195397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:41,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50413 states to 50413 states and 195397 transitions. [2021-06-05 17:06:41,701 INFO L78 Accepts]: Start accepts. Automaton has 50413 states and 195397 transitions. Word has length 30 [2021-06-05 17:06:41,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:41,701 INFO L482 AbstractCegarLoop]: Abstraction has 50413 states and 195397 transitions. [2021-06-05 17:06:41,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:41,702 INFO L276 IsEmpty]: Start isEmpty. Operand 50413 states and 195397 transitions. [2021-06-05 17:06:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:41,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:41,786 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 17:06:41,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-06-05 17:06:41,987 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash -215630961, now seen corresponding path program 183 times [2021-06-05 17:06:41,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:41,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740571283] [2021-06-05 17:06:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:42,224 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 17:06:42,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:42,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740571283] [2021-06-05 17:06:42,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740571283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:42,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897503159] [2021-06-05 17:06:42,225 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:42,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:06:42,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:42,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:06:42,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:42,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:42,494 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 25 treesize of output 53 [2021-06-05 17:06:42,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:06:42,607 INFO L628 ElimStorePlain]: treesize reduction 131, result has 36.7 percent of original size [2021-06-05 17:06:42,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:06:42,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:69 [2021-06-05 17:06:42,690 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 17:06:42,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897503159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:42,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:42,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 17:06:42,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438496772] [2021-06-05 17:06:42,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:06:42,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:42,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:06:42,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:06:42,691 INFO L87 Difference]: Start difference. First operand 50413 states and 195397 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:45,639 INFO L93 Difference]: Finished difference Result 72583 states and 276055 transitions. [2021-06-05 17:06:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:06:45,640 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 17:06:45,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:45,849 INFO L225 Difference]: With dead ends: 72583 [2021-06-05 17:06:45,849 INFO L226 Difference]: Without dead ends: 72568 [2021-06-05 17:06:45,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 2149.3ms TimeCoverageRelationStatistics Valid=486, Invalid=2936, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:06:45,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72568 states. [2021-06-05 17:06:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72568 to 50379. [2021-06-05 17:06:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50379 states, 50378 states have (on average 3.8765334074397555) internal successors, (195292), 50378 states have internal predecessors, (195292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50379 states to 50379 states and 195292 transitions. [2021-06-05 17:06:47,317 INFO L78 Accepts]: Start accepts. Automaton has 50379 states and 195292 transitions. Word has length 30 [2021-06-05 17:06:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:47,317 INFO L482 AbstractCegarLoop]: Abstraction has 50379 states and 195292 transitions. [2021-06-05 17:06:47,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 50379 states and 195292 transitions. [2021-06-05 17:06:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:47,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:47,397 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 17:06:47,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:47,597 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:47,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:47,598 INFO L82 PathProgramCache]: Analyzing trace with hash 2141926627, now seen corresponding path program 184 times [2021-06-05 17:06:47,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:47,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262718942] [2021-06-05 17:06:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:47,951 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-06-05 17:06:48,085 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 17:06:48,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:48,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262718942] [2021-06-05 17:06:48,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262718942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:48,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419153356] [2021-06-05 17:06:48,085 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:48,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:48,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:48,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:06:48,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:48,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:48,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:48,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:48,365 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 25 treesize of output 13 [2021-06-05 17:06:48,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:48,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:48,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:48,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:06:48,388 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 17:06:48,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419153356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:48,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:48,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:06:48,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412063256] [2021-06-05 17:06:48,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:06:48,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:48,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:06:48,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:06:48,389 INFO L87 Difference]: Start difference. First operand 50379 states and 195292 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:50,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:50,309 INFO L93 Difference]: Finished difference Result 74068 states and 280349 transitions. [2021-06-05 17:06:50,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:06:50,309 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 17:06:50,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:50,768 INFO L225 Difference]: With dead ends: 74068 [2021-06-05 17:06:50,768 INFO L226 Difference]: Without dead ends: 74038 [2021-06-05 17:06:50,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1515.0ms TimeCoverageRelationStatistics Valid=496, Invalid=2366, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:06:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74038 states. [2021-06-05 17:06:51,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74038 to 50389. [2021-06-05 17:06:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50389 states, 50388 states have (on average 3.8765579106136383) internal successors, (195332), 50388 states have internal predecessors, (195332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50389 states to 50389 states and 195332 transitions. [2021-06-05 17:06:52,139 INFO L78 Accepts]: Start accepts. Automaton has 50389 states and 195332 transitions. Word has length 30 [2021-06-05 17:06:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:52,139 INFO L482 AbstractCegarLoop]: Abstraction has 50389 states and 195332 transitions. [2021-06-05 17:06:52,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand 50389 states and 195332 transitions. [2021-06-05 17:06:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:52,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:52,228 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 17:06:52,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:52,452 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:52,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1974117535, now seen corresponding path program 185 times [2021-06-05 17:06:52,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:52,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864584478] [2021-06-05 17:06:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:52,643 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 17:06:52,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:52,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864584478] [2021-06-05 17:06:52,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864584478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:52,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109744739] [2021-06-05 17:06:52,644 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:52,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:06:52,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:52,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:06:52,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:52,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:52,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:52,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:52,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:52,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:52,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:06:52,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-05 17:06:52,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:52,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:52,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:52,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:7 [2021-06-05 17:06:52,915 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 17:06:52,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109744739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:52,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:52,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 17:06:52,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130955626] [2021-06-05 17:06:52,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:06:52,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:52,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:06:52,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:06:52,916 INFO L87 Difference]: Start difference. First operand 50389 states and 195332 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 17:06:54,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:54,399 INFO L93 Difference]: Finished difference Result 60193 states and 228714 transitions. [2021-06-05 17:06:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:06:54,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 30 [2021-06-05 17:06:54,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:54,589 INFO L225 Difference]: With dead ends: 60193 [2021-06-05 17:06:54,589 INFO L226 Difference]: Without dead ends: 60178 [2021-06-05 17:06:54,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 688.5ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:06:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60178 states. [2021-06-05 17:06:55,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60178 to 50385. [2021-06-05 17:06:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50385 states, 50384 states have (on average 3.876587805652588) internal successors, (195318), 50384 states have internal predecessors, (195318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:55,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50385 states to 50385 states and 195318 transitions. [2021-06-05 17:06:55,973 INFO L78 Accepts]: Start accepts. Automaton has 50385 states and 195318 transitions. Word has length 30 [2021-06-05 17:06:55,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:55,973 INFO L482 AbstractCegarLoop]: Abstraction has 50385 states and 195318 transitions. [2021-06-05 17:06:55,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 17:06:55,973 INFO L276 IsEmpty]: Start isEmpty. Operand 50385 states and 195318 transitions. [2021-06-05 17:06:56,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:06:56,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:56,055 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 17:06:56,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-06-05 17:06:56,255 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:56,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:56,256 INFO L82 PathProgramCache]: Analyzing trace with hash -93398493, now seen corresponding path program 186 times [2021-06-05 17:06:56,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:56,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583063687] [2021-06-05 17:06:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:56,434 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 17:06:56,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:56,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583063687] [2021-06-05 17:06:56,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583063687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:56,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069649090] [2021-06-05 17:06:56,434 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:56,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:06:56,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:56,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 17:06:56,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:56,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:06:56,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:56,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 61 [2021-06-05 17:06:56,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 17:06:56,825 INFO L628 ElimStorePlain]: treesize reduction 242, result has 13.3 percent of original size [2021-06-05 17:06:56,827 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 17:06:56,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:55 [2021-06-05 17:06:56,976 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 17:06:56,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069649090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:56,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:56,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 24 [2021-06-05 17:06:56,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647481721] [2021-06-05 17:06:56,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:06:56,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:56,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:06:56,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:06:56,977 INFO L87 Difference]: Start difference. First operand 50385 states and 195318 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:01,956 INFO L93 Difference]: Finished difference Result 78681 states and 297156 transitions. [2021-06-05 17:07:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 17:07:01,956 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 17:07:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:02,160 INFO L225 Difference]: With dead ends: 78681 [2021-06-05 17:07:02,161 INFO L226 Difference]: Without dead ends: 78666 [2021-06-05 17:07:02,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 3296.8ms TimeCoverageRelationStatistics Valid=1045, Invalid=6611, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 17:07:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78666 states. [2021-06-05 17:07:03,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78666 to 50388. [2021-06-05 17:07:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50388 states, 50387 states have (on average 3.876654692678667) internal successors, (195333), 50387 states have internal predecessors, (195333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50388 states to 50388 states and 195333 transitions. [2021-06-05 17:07:03,646 INFO L78 Accepts]: Start accepts. Automaton has 50388 states and 195333 transitions. Word has length 30 [2021-06-05 17:07:03,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:03,646 INFO L482 AbstractCegarLoop]: Abstraction has 50388 states and 195333 transitions. [2021-06-05 17:07:03,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:03,646 INFO L276 IsEmpty]: Start isEmpty. Operand 50388 states and 195333 transitions. [2021-06-05 17:07:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:03,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:03,732 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 17:07:03,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-05 17:07:03,933 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash -590119853, now seen corresponding path program 187 times [2021-06-05 17:07:03,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:03,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754675618] [2021-06-05 17:07:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:04,123 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-05 17:07:04,222 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 17:07:04,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:04,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754675618] [2021-06-05 17:07:04,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754675618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:04,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979104304] [2021-06-05 17:07:04,222 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:07:04,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:04,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:04,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:04,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:04,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:07:04,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:04,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:04,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:04,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:07:04,503 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 17:07:04,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979104304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:04,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:04,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:07:04,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578475437] [2021-06-05 17:07:04,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:07:04,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:04,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:07:04,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:07:04,504 INFO L87 Difference]: Start difference. First operand 50388 states and 195333 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:07:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:06,615 INFO L93 Difference]: Finished difference Result 77532 states and 294234 transitions. [2021-06-05 17:07:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:07:06,616 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 30 [2021-06-05 17:07:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:06,848 INFO L225 Difference]: With dead ends: 77532 [2021-06-05 17:07:06,848 INFO L226 Difference]: Without dead ends: 77517 [2021-06-05 17:07:06,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1228.7ms TimeCoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:07:06,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77517 states. [2021-06-05 17:07:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77517 to 50404. [2021-06-05 17:07:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50404 states, 50403 states have (on average 3.8768724083883894) internal successors, (195406), 50403 states have internal predecessors, (195406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50404 states to 50404 states and 195406 transitions. [2021-06-05 17:07:08,434 INFO L78 Accepts]: Start accepts. Automaton has 50404 states and 195406 transitions. Word has length 30 [2021-06-05 17:07:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:08,434 INFO L482 AbstractCegarLoop]: Abstraction has 50404 states and 195406 transitions. [2021-06-05 17:07:08,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:07:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 50404 states and 195406 transitions. [2021-06-05 17:07:08,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:08,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:08,516 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 17:07:08,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-06-05 17:07:08,717 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:08,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:08,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2087314663, now seen corresponding path program 188 times [2021-06-05 17:07:08,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:08,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682318828] [2021-06-05 17:07:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:09,068 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-06-05 17:07:09,306 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 17:07:09,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:09,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682318828] [2021-06-05 17:07:09,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682318828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:09,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797868195] [2021-06-05 17:07:09,306 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:09,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:09,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:07:09,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:09,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:09,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:09,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:09,570 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 25 treesize of output 37 [2021-06-05 17:07:09,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:07:09,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:09,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:07:09,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-06-05 17:07:09,627 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 17:07:09,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797868195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:09,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:09,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:07:09,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453788536] [2021-06-05 17:07:09,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:07:09,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:09,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:07:09,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:07:09,628 INFO L87 Difference]: Start difference. First operand 50404 states and 195406 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 17:07:12,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:12,298 INFO L93 Difference]: Finished difference Result 79064 states and 298479 transitions. [2021-06-05 17:07:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:07:12,299 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 30 [2021-06-05 17:07:12,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:12,508 INFO L225 Difference]: With dead ends: 79064 [2021-06-05 17:07:12,508 INFO L226 Difference]: Without dead ends: 79034 [2021-06-05 17:07:12,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 2149.9ms TimeCoverageRelationStatistics Valid=813, Invalid=3743, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:07:12,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79034 states. [2021-06-05 17:07:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79034 to 50410. [2021-06-05 17:07:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50410 states, 50409 states have (on average 3.876986252454919) internal successors, (195435), 50409 states have internal predecessors, (195435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50410 states to 50410 states and 195435 transitions. [2021-06-05 17:07:13,987 INFO L78 Accepts]: Start accepts. Automaton has 50410 states and 195435 transitions. Word has length 30 [2021-06-05 17:07:13,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:13,988 INFO L482 AbstractCegarLoop]: Abstraction has 50410 states and 195435 transitions. [2021-06-05 17:07:13,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 17:07:13,988 INFO L276 IsEmpty]: Start isEmpty. Operand 50410 states and 195435 transitions. [2021-06-05 17:07:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:14,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:14,069 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 17:07:14,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:14,270 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:14,270 INFO L82 PathProgramCache]: Analyzing trace with hash 304550503, now seen corresponding path program 189 times [2021-06-05 17:07:14,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:14,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751221465] [2021-06-05 17:07:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:14,517 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 17:07:14,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:14,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751221465] [2021-06-05 17:07:14,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751221465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:14,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665502301] [2021-06-05 17:07:14,517 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:14,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:07:14,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:07:14,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:14,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:14,789 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 25 treesize of output 53 [2021-06-05 17:07:14,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:07:14,909 INFO L628 ElimStorePlain]: treesize reduction 150, result has 35.9 percent of original size [2021-06-05 17:07:14,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:07:14,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:94 [2021-06-05 17:07:14,997 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 17:07:14,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665502301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:14,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:14,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 17:07:14,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489947046] [2021-06-05 17:07:14,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:07:14,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:14,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:07:14,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:07:14,998 INFO L87 Difference]: Start difference. First operand 50410 states and 195435 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:19,004 INFO L93 Difference]: Finished difference Result 78571 states and 297050 transitions. [2021-06-05 17:07:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:07:19,004 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 17:07:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:19,211 INFO L225 Difference]: With dead ends: 78571 [2021-06-05 17:07:19,211 INFO L226 Difference]: Without dead ends: 78556 [2021-06-05 17:07:19,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 2753.0ms TimeCoverageRelationStatistics Valid=709, Invalid=3847, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:07:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78556 states. [2021-06-05 17:07:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78556 to 50420. [2021-06-05 17:07:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50420 states, 50419 states have (on average 3.8771296535036397) internal successors, (195481), 50419 states have internal predecessors, (195481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50420 states to 50420 states and 195481 transitions. [2021-06-05 17:07:20,698 INFO L78 Accepts]: Start accepts. Automaton has 50420 states and 195481 transitions. Word has length 30 [2021-06-05 17:07:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:20,698 INFO L482 AbstractCegarLoop]: Abstraction has 50420 states and 195481 transitions. [2021-06-05 17:07:20,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 50420 states and 195481 transitions. [2021-06-05 17:07:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:20,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:20,779 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 17:07:20,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:20,979 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:20,979 INFO L82 PathProgramCache]: Analyzing trace with hash 878613223, now seen corresponding path program 190 times [2021-06-05 17:07:20,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:20,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869761584] [2021-06-05 17:07:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:21,143 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 17:07:21,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:21,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869761584] [2021-06-05 17:07:21,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869761584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:21,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631217636] [2021-06-05 17:07:21,143 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:21,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:21,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:21,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:07:21,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:21,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:21,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:21,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:21,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:21,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:21,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:21,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:07:21,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:21,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:21,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:21,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:07:21,488 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 17:07:21,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631217636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:21,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:21,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:07:21,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660989187] [2021-06-05 17:07:21,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:07:21,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:21,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:07:21,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:07:21,489 INFO L87 Difference]: Start difference. First operand 50420 states and 195481 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:23,034 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 17:07:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:28,419 INFO L93 Difference]: Finished difference Result 96588 states and 356674 transitions. [2021-06-05 17:07:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 17:07:28,429 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:07:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:28,718 INFO L225 Difference]: With dead ends: 96588 [2021-06-05 17:07:28,718 INFO L226 Difference]: Without dead ends: 96543 [2021-06-05 17:07:28,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 4770.8ms TimeCoverageRelationStatistics Valid=1133, Invalid=8373, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 17:07:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96543 states. [2021-06-05 17:07:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96543 to 50456. [2021-06-05 17:07:30,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50456 states, 50455 states have (on average 3.877653354474284) internal successors, (195647), 50455 states have internal predecessors, (195647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50456 states to 50456 states and 195647 transitions. [2021-06-05 17:07:30,688 INFO L78 Accepts]: Start accepts. Automaton has 50456 states and 195647 transitions. Word has length 30 [2021-06-05 17:07:30,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:30,689 INFO L482 AbstractCegarLoop]: Abstraction has 50456 states and 195647 transitions. [2021-06-05 17:07:30,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 50456 states and 195647 transitions. [2021-06-05 17:07:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:30,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:30,775 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 17:07:30,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:30,975 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:30,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:30,976 INFO L82 PathProgramCache]: Analyzing trace with hash 276888099, now seen corresponding path program 191 times [2021-06-05 17:07:30,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:30,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929658854] [2021-06-05 17:07:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:31,170 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 17:07:31,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:31,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929658854] [2021-06-05 17:07:31,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929658854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:31,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110701419] [2021-06-05 17:07:31,170 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:31,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:07:31,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:31,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:07:31,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:31,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:31,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:31,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:31,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 37 [2021-06-05 17:07:31,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:07:31,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:31,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:07:31,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-06-05 17:07:31,473 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 17:07:31,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110701419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:31,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:31,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:07:31,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393889721] [2021-06-05 17:07:31,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:07:31,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:31,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:07:31,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:07:31,474 INFO L87 Difference]: Start difference. First operand 50456 states and 195647 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 17:07:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:34,256 INFO L93 Difference]: Finished difference Result 81340 states and 306603 transitions. [2021-06-05 17:07:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:07:34,256 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 30 [2021-06-05 17:07:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:34,481 INFO L225 Difference]: With dead ends: 81340 [2021-06-05 17:07:34,481 INFO L226 Difference]: Without dead ends: 81310 [2021-06-05 17:07:34,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1553.2ms TimeCoverageRelationStatistics Valid=729, Invalid=2931, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:07:34,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81310 states. [2021-06-05 17:07:35,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81310 to 50462. [2021-06-05 17:07:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50462 states, 50461 states have (on average 3.877945343928975) internal successors, (195685), 50461 states have internal predecessors, (195685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50462 states to 50462 states and 195685 transitions. [2021-06-05 17:07:36,097 INFO L78 Accepts]: Start accepts. Automaton has 50462 states and 195685 transitions. Word has length 30 [2021-06-05 17:07:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:36,097 INFO L482 AbstractCegarLoop]: Abstraction has 50462 states and 195685 transitions. [2021-06-05 17:07:36,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 17:07:36,097 INFO L276 IsEmpty]: Start isEmpty. Operand 50462 states and 195685 transitions. [2021-06-05 17:07:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:36,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:36,179 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 17:07:36,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:36,380 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:36,380 INFO L82 PathProgramCache]: Analyzing trace with hash 297624627, now seen corresponding path program 192 times [2021-06-05 17:07:36,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:36,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630326459] [2021-06-05 17:07:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:36,624 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 17:07:36,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:36,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630326459] [2021-06-05 17:07:36,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630326459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:36,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913045850] [2021-06-05 17:07:36,625 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:36,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:07:36,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:36,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 17:07:36,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:37,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:37,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:37,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:37,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:37,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:37,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:37,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-06-05 17:07:37,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:07:37,285 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.7 percent of original size [2021-06-05 17:07:37,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:37,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:35 [2021-06-05 17:07:37,335 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 17:07:37,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913045850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:37,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:37,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 24 [2021-06-05 17:07:37,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136804537] [2021-06-05 17:07:37,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:07:37,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:37,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:07:37,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:07:37,335 INFO L87 Difference]: Start difference. First operand 50462 states and 195685 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 17:07:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:40,731 INFO L93 Difference]: Finished difference Result 79161 states and 299995 transitions. [2021-06-05 17:07:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:07:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-06-05 17:07:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:40,945 INFO L225 Difference]: With dead ends: 79161 [2021-06-05 17:07:40,945 INFO L226 Difference]: Without dead ends: 79131 [2021-06-05 17:07:40,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2253.4ms TimeCoverageRelationStatistics Valid=660, Invalid=3372, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:07:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79131 states. [2021-06-05 17:07:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79131 to 50460. [2021-06-05 17:07:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50460 states, 50459 states have (on average 3.877960324223627) internal successors, (195678), 50459 states have internal predecessors, (195678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50460 states to 50460 states and 195678 transitions. [2021-06-05 17:07:42,472 INFO L78 Accepts]: Start accepts. Automaton has 50460 states and 195678 transitions. Word has length 30 [2021-06-05 17:07:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:42,472 INFO L482 AbstractCegarLoop]: Abstraction has 50460 states and 195678 transitions. [2021-06-05 17:07:42,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 17:07:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 50460 states and 195678 transitions. [2021-06-05 17:07:42,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:42,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:42,555 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 17:07:42,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-05 17:07:42,756 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:42,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2080925591, now seen corresponding path program 193 times [2021-06-05 17:07:42,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:42,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159573633] [2021-06-05 17:07:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:42,916 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 17:07:42,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:42,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159573633] [2021-06-05 17:07:42,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159573633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:42,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870731913] [2021-06-05 17:07:42,916 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:42,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:07:42,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:43,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:43,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:43,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:43,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:43,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:43,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:43,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:07:43,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:43,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:43,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:43,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:07:43,256 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 17:07:43,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870731913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:43,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:43,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:07:43,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298596585] [2021-06-05 17:07:43,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:07:43,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:43,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:07:43,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:07:43,257 INFO L87 Difference]: Start difference. First operand 50460 states and 195678 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:47,902 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-06-05 17:07:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:49,272 INFO L93 Difference]: Finished difference Result 95802 states and 354482 transitions. [2021-06-05 17:07:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 17:07:49,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:07:49,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:49,536 INFO L225 Difference]: With dead ends: 95802 [2021-06-05 17:07:49,536 INFO L226 Difference]: Without dead ends: 95757 [2021-06-05 17:07:49,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 4112.1ms TimeCoverageRelationStatistics Valid=1115, Invalid=7441, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 17:07:49,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95757 states. [2021-06-05 17:07:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95757 to 50464. [2021-06-05 17:07:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50464 states, 50463 states have (on average 3.8779898143194025) internal successors, (195695), 50463 states have internal predecessors, (195695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50464 states to 50464 states and 195695 transitions. [2021-06-05 17:07:51,540 INFO L78 Accepts]: Start accepts. Automaton has 50464 states and 195695 transitions. Word has length 30 [2021-06-05 17:07:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:51,540 INFO L482 AbstractCegarLoop]: Abstraction has 50464 states and 195695 transitions. [2021-06-05 17:07:51,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 50464 states and 195695 transitions. [2021-06-05 17:07:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:07:51,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:51,627 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 17:07:51,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:51,828 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:51,828 INFO L82 PathProgramCache]: Analyzing trace with hash -380393053, now seen corresponding path program 194 times [2021-06-05 17:07:51,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:51,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203592014] [2021-06-05 17:07:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:52,048 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 17:07:52,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:52,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203592014] [2021-06-05 17:07:52,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203592014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:52,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364183577] [2021-06-05 17:07:52,048 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:52,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:52,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:52,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:07:52,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:52,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:52,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:52,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:52,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:52,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:52,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:52,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:07:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:07:52,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:52,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 17:07:52,281 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:07:52,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:52,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:52,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-06-05 17:07:52,329 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 17:07:52,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364183577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:52,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:52,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:07:52,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126800300] [2021-06-05 17:07:52,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:07:52,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:52,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:07:52,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:07:52,330 INFO L87 Difference]: Start difference. First operand 50464 states and 195695 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:58,681 INFO L93 Difference]: Finished difference Result 97872 states and 363697 transitions. [2021-06-05 17:07:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 17:07:58,681 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:07:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:58,929 INFO L225 Difference]: With dead ends: 97872 [2021-06-05 17:07:58,929 INFO L226 Difference]: Without dead ends: 97842 [2021-06-05 17:07:58,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 4287.4ms TimeCoverageRelationStatistics Valid=1175, Invalid=8725, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 17:07:59,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97842 states. [2021-06-05 17:08:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97842 to 50467. [2021-06-05 17:08:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50467 states, 50466 states have (on average 3.8780565132960807) internal successors, (195710), 50466 states have internal predecessors, (195710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50467 states to 50467 states and 195710 transitions. [2021-06-05 17:08:00,706 INFO L78 Accepts]: Start accepts. Automaton has 50467 states and 195710 transitions. Word has length 30 [2021-06-05 17:08:00,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:00,706 INFO L482 AbstractCegarLoop]: Abstraction has 50467 states and 195710 transitions. [2021-06-05 17:08:00,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:00,706 INFO L276 IsEmpty]: Start isEmpty. Operand 50467 states and 195710 transitions. [2021-06-05 17:08:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:00,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:00,791 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 17:08:00,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:00,992 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:00,992 INFO L82 PathProgramCache]: Analyzing trace with hash -303306601, now seen corresponding path program 195 times [2021-06-05 17:08:00,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:00,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350806290] [2021-06-05 17:08:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:01,311 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 17:08:01,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:01,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350806290] [2021-06-05 17:08:01,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350806290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:01,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646793139] [2021-06-05 17:08:01,311 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:01,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:08:01,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:01,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:08:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:01,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:01,976 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 25 treesize of output 53 [2021-06-05 17:08:01,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:08:02,091 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-06-05 17:08:02,092 INFO L628 ElimStorePlain]: treesize reduction 131, result has 37.9 percent of original size [2021-06-05 17:08:02,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:08:02,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:90 [2021-06-05 17:08:02,177 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 17:08:02,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646793139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:02,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:02,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 17:08:02,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38764120] [2021-06-05 17:08:02,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:08:02,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:02,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:08:02,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:08:02,177 INFO L87 Difference]: Start difference. First operand 50467 states and 195710 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:05,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:05,437 INFO L93 Difference]: Finished difference Result 73646 states and 278776 transitions. [2021-06-05 17:08:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:08:05,438 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 17:08:05,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:05,647 INFO L225 Difference]: With dead ends: 73646 [2021-06-05 17:08:05,648 INFO L226 Difference]: Without dead ends: 73631 [2021-06-05 17:08:05,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2440.9ms TimeCoverageRelationStatistics Valid=459, Invalid=2621, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:08:05,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73631 states. [2021-06-05 17:08:06,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73631 to 50482. [2021-06-05 17:08:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50482 states, 50481 states have (on average 3.878171985499495) internal successors, (195774), 50481 states have internal predecessors, (195774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50482 states to 50482 states and 195774 transitions. [2021-06-05 17:08:07,111 INFO L78 Accepts]: Start accepts. Automaton has 50482 states and 195774 transitions. Word has length 30 [2021-06-05 17:08:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:07,111 INFO L482 AbstractCegarLoop]: Abstraction has 50482 states and 195774 transitions. [2021-06-05 17:08:07,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 50482 states and 195774 transitions. [2021-06-05 17:08:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:07,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:07,193 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 17:08:07,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 17:08:07,394 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:07,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:07,394 INFO L82 PathProgramCache]: Analyzing trace with hash 270756119, now seen corresponding path program 196 times [2021-06-05 17:08:07,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:07,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823107667] [2021-06-05 17:08:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:07,541 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 17:08:07,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:07,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823107667] [2021-06-05 17:08:07,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823107667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:07,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390063756] [2021-06-05 17:08:07,542 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:07,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:08:07,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:08:07,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:07,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:07,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:07,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:07,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:07,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:07,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:07,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:08:07,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:08:07,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:07,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:07,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:08:07,943 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 17:08:07,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390063756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:07,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:07,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:08:07,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925457848] [2021-06-05 17:08:07,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:08:07,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:07,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:08:07,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:08:07,944 INFO L87 Difference]: Start difference. First operand 50482 states and 195774 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:14,292 INFO L93 Difference]: Finished difference Result 89554 states and 331893 transitions. [2021-06-05 17:08:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 17:08:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:08:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:14,535 INFO L225 Difference]: With dead ends: 89554 [2021-06-05 17:08:14,536 INFO L226 Difference]: Without dead ends: 89509 [2021-06-05 17:08:14,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2744 ImplicationChecksByTransitivity, 4077.8ms TimeCoverageRelationStatistics Valid=898, Invalid=7474, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 17:08:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89509 states. [2021-06-05 17:08:15,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89509 to 50513. [2021-06-05 17:08:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50513 states, 50512 states have (on average 3.8782467532467533) internal successors, (195898), 50512 states have internal predecessors, (195898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50513 states to 50513 states and 195898 transitions. [2021-06-05 17:08:16,430 INFO L78 Accepts]: Start accepts. Automaton has 50513 states and 195898 transitions. Word has length 30 [2021-06-05 17:08:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:16,431 INFO L482 AbstractCegarLoop]: Abstraction has 50513 states and 195898 transitions. [2021-06-05 17:08:16,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:16,431 INFO L276 IsEmpty]: Start isEmpty. Operand 50513 states and 195898 transitions. [2021-06-05 17:08:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:16,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:16,516 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 17:08:16,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:16,717 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:16,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:16,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1364847707, now seen corresponding path program 197 times [2021-06-05 17:08:16,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:16,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661314759] [2021-06-05 17:08:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:16,874 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 17:08:16,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:16,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661314759] [2021-06-05 17:08:16,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661314759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:16,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970356802] [2021-06-05 17:08:16,875 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:16,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:08:16,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:16,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:08:16,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:17,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:17,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:17,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:17,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:17,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:17,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:17,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:17,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:17,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 49 [2021-06-05 17:08:17,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:08:17,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:17,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:17,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:17 [2021-06-05 17:08:17,145 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 17:08:17,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970356802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:17,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:17,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:08:17,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43463738] [2021-06-05 17:08:17,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:08:17,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:17,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:08:17,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:08:17,146 INFO L87 Difference]: Start difference. First operand 50513 states and 195898 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:19,584 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-05 17:08:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:23,831 INFO L93 Difference]: Finished difference Result 88714 states and 329526 transitions. [2021-06-05 17:08:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 17:08:23,831 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:08:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:24,077 INFO L225 Difference]: With dead ends: 88714 [2021-06-05 17:08:24,077 INFO L226 Difference]: Without dead ends: 88684 [2021-06-05 17:08:24,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 4464.4ms TimeCoverageRelationStatistics Valid=976, Invalid=10366, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 17:08:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88684 states. [2021-06-05 17:08:25,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88684 to 50507. [2021-06-05 17:08:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50507 states, 50506 states have (on average 3.8780936918385933) internal successors, (195867), 50506 states have internal predecessors, (195867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:25,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50507 states to 50507 states and 195867 transitions. [2021-06-05 17:08:25,749 INFO L78 Accepts]: Start accepts. Automaton has 50507 states and 195867 transitions. Word has length 30 [2021-06-05 17:08:25,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:25,749 INFO L482 AbstractCegarLoop]: Abstraction has 50507 states and 195867 transitions. [2021-06-05 17:08:25,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 50507 states and 195867 transitions. [2021-06-05 17:08:25,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:25,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:25,829 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 17:08:26,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-06-05 17:08:26,030 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:26,030 INFO L82 PathProgramCache]: Analyzing trace with hash -781323053, now seen corresponding path program 198 times [2021-06-05 17:08:26,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:26,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556725091] [2021-06-05 17:08:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:26,179 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 17:08:26,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:26,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556725091] [2021-06-05 17:08:26,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556725091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:26,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943075349] [2021-06-05 17:08:26,179 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:26,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:08:26,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:26,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:08:26,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:26,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:26,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:26,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:26,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:26,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:26,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:08:26,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:08:26,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:26,774 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 17:08:26,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 17:08:26,793 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 17:08:26,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943075349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:26,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:26,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:08:26,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860499769] [2021-06-05 17:08:26,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:08:26,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:26,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:08:26,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:08:26,793 INFO L87 Difference]: Start difference. First operand 50507 states and 195867 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:30,085 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 17:08:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:32,096 INFO L93 Difference]: Finished difference Result 99478 states and 365820 transitions. [2021-06-05 17:08:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:08:32,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:08:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:32,379 INFO L225 Difference]: With dead ends: 99478 [2021-06-05 17:08:32,379 INFO L226 Difference]: Without dead ends: 99448 [2021-06-05 17:08:32,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3040 ImplicationChecksByTransitivity, 3940.0ms TimeCoverageRelationStatistics Valid=1062, Invalid=7868, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 17:08:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99448 states. [2021-06-05 17:08:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99448 to 50525. [2021-06-05 17:08:34,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50525 states, 50524 states have (on average 3.8780777452299895) internal successors, (195936), 50524 states have internal predecessors, (195936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50525 states to 50525 states and 195936 transitions. [2021-06-05 17:08:34,248 INFO L78 Accepts]: Start accepts. Automaton has 50525 states and 195936 transitions. Word has length 30 [2021-06-05 17:08:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:34,248 INFO L482 AbstractCegarLoop]: Abstraction has 50525 states and 195936 transitions. [2021-06-05 17:08:34,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:34,248 INFO L276 IsEmpty]: Start isEmpty. Operand 50525 states and 195936 transitions. [2021-06-05 17:08:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:34,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:34,329 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 17:08:34,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:34,530 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:34,530 INFO L82 PathProgramCache]: Analyzing trace with hash 25852971, now seen corresponding path program 199 times [2021-06-05 17:08:34,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:34,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527645103] [2021-06-05 17:08:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:34,779 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 17:08:34,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:34,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527645103] [2021-06-05 17:08:34,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527645103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:34,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118539191] [2021-06-05 17:08:34,779 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:34,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:08:34,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:35,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:35,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:35,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:35,015 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 25 treesize of output 13 [2021-06-05 17:08:35,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:08:35,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:35,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:35,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:08:35,036 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 17:08:35,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118539191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:35,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:35,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:08:35,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917867800] [2021-06-05 17:08:35,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:08:35,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:35,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:08:35,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:08:35,037 INFO L87 Difference]: Start difference. First operand 50525 states and 195936 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:08:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:37,383 INFO L93 Difference]: Finished difference Result 77721 states and 294719 transitions. [2021-06-05 17:08:37,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:08:37,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 30 [2021-06-05 17:08:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:37,620 INFO L225 Difference]: With dead ends: 77721 [2021-06-05 17:08:37,620 INFO L226 Difference]: Without dead ends: 77706 [2021-06-05 17:08:37,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1335.2ms TimeCoverageRelationStatistics Valid=400, Invalid=1670, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:08:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77706 states. [2021-06-05 17:08:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77706 to 50552. [2021-06-05 17:08:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50552 states, 50551 states have (on average 3.878043955609187) internal successors, (196039), 50551 states have internal predecessors, (196039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50552 states to 50552 states and 196039 transitions. [2021-06-05 17:08:39,308 INFO L78 Accepts]: Start accepts. Automaton has 50552 states and 196039 transitions. Word has length 30 [2021-06-05 17:08:39,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:39,308 INFO L482 AbstractCegarLoop]: Abstraction has 50552 states and 196039 transitions. [2021-06-05 17:08:39,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:08:39,308 INFO L276 IsEmpty]: Start isEmpty. Operand 50552 states and 196039 transitions. [2021-06-05 17:08:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:39,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:39,393 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 17:08:39,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable758 [2021-06-05 17:08:39,594 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:39,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1615723347, now seen corresponding path program 200 times [2021-06-05 17:08:39,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:39,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477126131] [2021-06-05 17:08:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:39,853 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 17:08:39,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:39,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477126131] [2021-06-05 17:08:39,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477126131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:39,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391156919] [2021-06-05 17:08:39,853 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:39,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:39,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:39,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:08:39,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:40,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:40,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:40,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:40,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-06-05 17:08:40,037 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:08:40,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:40,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:40,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 17:08:40,077 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 17:08:40,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391156919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:40,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:40,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:08:40,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676193034] [2021-06-05 17:08:40,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:08:40,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:40,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:08:40,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:08:40,078 INFO L87 Difference]: Start difference. First operand 50552 states and 196039 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:40,494 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-06-05 17:08:42,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:42,901 INFO L93 Difference]: Finished difference Result 77561 states and 294327 transitions. [2021-06-05 17:08:42,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:08:42,902 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 17:08:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:43,378 INFO L225 Difference]: With dead ends: 77561 [2021-06-05 17:08:43,379 INFO L226 Difference]: Without dead ends: 77546 [2021-06-05 17:08:43,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2086.3ms TimeCoverageRelationStatistics Valid=480, Invalid=2600, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:08:43,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77546 states. [2021-06-05 17:08:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77546 to 50543. [2021-06-05 17:08:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50543 states, 50542 states have (on average 3.8782596652289185) internal successors, (196015), 50542 states have internal predecessors, (196015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:44,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50543 states to 50543 states and 196015 transitions. [2021-06-05 17:08:44,842 INFO L78 Accepts]: Start accepts. Automaton has 50543 states and 196015 transitions. Word has length 30 [2021-06-05 17:08:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:44,842 INFO L482 AbstractCegarLoop]: Abstraction has 50543 states and 196015 transitions. [2021-06-05 17:08:44,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:44,842 INFO L276 IsEmpty]: Start isEmpty. Operand 50543 states and 196015 transitions. [2021-06-05 17:08:44,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:44,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:44,927 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 17:08:45,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:45,127 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:45,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2130621987, now seen corresponding path program 201 times [2021-06-05 17:08:45,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:45,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937505915] [2021-06-05 17:08:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:45,284 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 17:08:45,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:45,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937505915] [2021-06-05 17:08:45,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937505915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:45,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359010539] [2021-06-05 17:08:45,285 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:45,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:08:45,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:45,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:08:45,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:45,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:45,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:45,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:45,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 57 [2021-06-05 17:08:45,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:08:45,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:45,560 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 17:08:45,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:35 [2021-06-05 17:08:45,614 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 17:08:45,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359010539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:45,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:45,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:08:45,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548005369] [2021-06-05 17:08:45,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:08:45,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:45,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:08:45,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:08:45,615 INFO L87 Difference]: Start difference. First operand 50543 states and 196015 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:47,469 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-05 17:08:48,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:48,359 INFO L93 Difference]: Finished difference Result 98552 states and 363159 transitions. [2021-06-05 17:08:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:08:48,359 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:08:48,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:48,651 INFO L225 Difference]: With dead ends: 98552 [2021-06-05 17:08:48,652 INFO L226 Difference]: Without dead ends: 98537 [2021-06-05 17:08:48,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1680.2ms TimeCoverageRelationStatistics Valid=415, Invalid=2555, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:08:48,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98537 states. [2021-06-05 17:08:50,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98537 to 50554. [2021-06-05 17:08:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50554 states, 50553 states have (on average 3.8781872490257747) internal successors, (196054), 50553 states have internal predecessors, (196054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50554 states to 50554 states and 196054 transitions. [2021-06-05 17:08:50,866 INFO L78 Accepts]: Start accepts. Automaton has 50554 states and 196054 transitions. Word has length 30 [2021-06-05 17:08:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:50,866 INFO L482 AbstractCegarLoop]: Abstraction has 50554 states and 196054 transitions. [2021-06-05 17:08:50,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 50554 states and 196054 transitions. [2021-06-05 17:08:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:50,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:50,957 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 17:08:51,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 17:08:51,158 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:51,158 INFO L82 PathProgramCache]: Analyzing trace with hash 636714265, now seen corresponding path program 202 times [2021-06-05 17:08:51,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:51,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490197985] [2021-06-05 17:08:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:51,312 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 17:08:51,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:51,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490197985] [2021-06-05 17:08:51,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490197985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:51,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777101085] [2021-06-05 17:08:51,313 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:51,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:08:51,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:51,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:08:51,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:51,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:51,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:51,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:51,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:51,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:51,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:51,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:51,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:51,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:51,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:08:51,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:08:51,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:51,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:51,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:15 [2021-06-05 17:08:51,684 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 17:08:51,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777101085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:51,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:51,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 17:08:51,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400495648] [2021-06-05 17:08:51,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:08:51,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:51,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:08:51,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:08:51,685 INFO L87 Difference]: Start difference. First operand 50554 states and 196054 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:54,079 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 17:08:56,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:56,299 INFO L93 Difference]: Finished difference Result 87806 states and 326906 transitions. [2021-06-05 17:08:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:08:56,300 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 17:08:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:56,526 INFO L225 Difference]: With dead ends: 87806 [2021-06-05 17:08:56,526 INFO L226 Difference]: Without dead ends: 87758 [2021-06-05 17:08:56,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2408 ImplicationChecksByTransitivity, 3439.0ms TimeCoverageRelationStatistics Valid=870, Invalid=6270, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:08:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87758 states. [2021-06-05 17:08:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87758 to 50572. [2021-06-05 17:08:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50572 states, 50571 states have (on average 3.877854897075399) internal successors, (196107), 50571 states have internal predecessors, (196107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50572 states to 50572 states and 196107 transitions. [2021-06-05 17:08:58,392 INFO L78 Accepts]: Start accepts. Automaton has 50572 states and 196107 transitions. Word has length 30 [2021-06-05 17:08:58,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:58,392 INFO L482 AbstractCegarLoop]: Abstraction has 50572 states and 196107 transitions. [2021-06-05 17:08:58,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 50572 states and 196107 transitions. [2021-06-05 17:08:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:08:58,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:58,478 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 17:08:58,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:58,679 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:58,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:58,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1155811945, now seen corresponding path program 203 times [2021-06-05 17:08:58,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:58,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406700517] [2021-06-05 17:08:58,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:58,826 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 17:08:58,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:58,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406700517] [2021-06-05 17:08:58,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406700517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:58,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505451958] [2021-06-05 17:08:58,826 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:58,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:08:58,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:58,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:08:58,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:59,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:59,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:59,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:59,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:59,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:08:59,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:08:59,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:08:59,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:08:59,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:08:59,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:08:59,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:08:59,206 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 17:08:59,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505451958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:59,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:59,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:08:59,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624845733] [2021-06-05 17:08:59,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:08:59,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:59,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:08:59,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:08:59,207 INFO L87 Difference]: Start difference. First operand 50572 states and 196107 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:05,109 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 17:09:05,297 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 17:09:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:05,941 INFO L93 Difference]: Finished difference Result 99700 states and 367419 transitions. [2021-06-05 17:09:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:09:05,941 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:09:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:06,230 INFO L225 Difference]: With dead ends: 99700 [2021-06-05 17:09:06,230 INFO L226 Difference]: Without dead ends: 99670 [2021-06-05 17:09:06,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 4694.8ms TimeCoverageRelationStatistics Valid=1197, Invalid=7545, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 17:09:06,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99670 states. [2021-06-05 17:09:07,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99670 to 50590. [2021-06-05 17:09:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50590 states, 50589 states have (on average 3.8781355630670697) internal successors, (196191), 50589 states have internal predecessors, (196191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50590 states to 50590 states and 196191 transitions. [2021-06-05 17:09:08,017 INFO L78 Accepts]: Start accepts. Automaton has 50590 states and 196191 transitions. Word has length 30 [2021-06-05 17:09:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:08,017 INFO L482 AbstractCegarLoop]: Abstraction has 50590 states and 196191 transitions. [2021-06-05 17:09:08,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 50590 states and 196191 transitions. [2021-06-05 17:09:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:08,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:08,099 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 17:09:08,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:08,299 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:08,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1521622571, now seen corresponding path program 204 times [2021-06-05 17:09:08,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:08,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389979271] [2021-06-05 17:09:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:08,822 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 17:09:08,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:08,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389979271] [2021-06-05 17:09:08,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389979271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:08,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440014619] [2021-06-05 17:09:08,822 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:08,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:09:08,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:08,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:09:08,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:09,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:09,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:09,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 67 [2021-06-05 17:09:09,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:09:09,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:09,077 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 17:09:09,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:35 [2021-06-05 17:09:09,161 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 17:09:09,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440014619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:09,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:09,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:09:09,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734316080] [2021-06-05 17:09:09,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:09:09,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:09,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:09:09,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:09:09,162 INFO L87 Difference]: Start difference. First operand 50590 states and 196191 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:12,167 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 17:09:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:14,162 INFO L93 Difference]: Finished difference Result 97442 states and 361782 transitions. [2021-06-05 17:09:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:09:14,163 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:09:14,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:14,428 INFO L225 Difference]: With dead ends: 97442 [2021-06-05 17:09:14,428 INFO L226 Difference]: Without dead ends: 97427 [2021-06-05 17:09:14,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 3509.2ms TimeCoverageRelationStatistics Valid=921, Invalid=5241, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 17:09:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97427 states. [2021-06-05 17:09:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97427 to 50590. [2021-06-05 17:09:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50590 states, 50589 states have (on average 3.8781355630670697) internal successors, (196191), 50589 states have internal predecessors, (196191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50590 states to 50590 states and 196191 transitions. [2021-06-05 17:09:16,309 INFO L78 Accepts]: Start accepts. Automaton has 50590 states and 196191 transitions. Word has length 30 [2021-06-05 17:09:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:16,310 INFO L482 AbstractCegarLoop]: Abstraction has 50590 states and 196191 transitions. [2021-06-05 17:09:16,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 50590 states and 196191 transitions. [2021-06-05 17:09:16,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:16,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:16,394 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 17:09:16,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:16,595 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:16,595 INFO L82 PathProgramCache]: Analyzing trace with hash -725796723, now seen corresponding path program 205 times [2021-06-05 17:09:16,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:16,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106337116] [2021-06-05 17:09:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:16,783 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 17:09:16,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:16,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106337116] [2021-06-05 17:09:16,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106337116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:16,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239082418] [2021-06-05 17:09:16,783 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:16,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:09:16,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:16,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:16,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:16,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:16,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:16,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:16,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:16,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:16,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:16,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:16,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 17:09:16,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:09:16,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:16,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:09:16,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-06-05 17:09:17,029 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 17:09:17,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239082418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:17,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:17,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 17:09:17,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556856014] [2021-06-05 17:09:17,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:09:17,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:17,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:09:17,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:09:17,030 INFO L87 Difference]: Start difference. First operand 50590 states and 196191 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:09:18,637 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-06-05 17:09:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:20,600 INFO L93 Difference]: Finished difference Result 74459 states and 279252 transitions. [2021-06-05 17:09:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:09:20,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 30 [2021-06-05 17:09:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:20,805 INFO L225 Difference]: With dead ends: 74459 [2021-06-05 17:09:20,805 INFO L226 Difference]: Without dead ends: 74429 [2021-06-05 17:09:20,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2781.4ms TimeCoverageRelationStatistics Valid=596, Invalid=3064, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:09:20,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74429 states. [2021-06-05 17:09:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74429 to 50603. [2021-06-05 17:09:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50603 states, 50602 states have (on average 3.878364491522074) internal successors, (196253), 50602 states have internal predecessors, (196253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50603 states to 50603 states and 196253 transitions. [2021-06-05 17:09:22,591 INFO L78 Accepts]: Start accepts. Automaton has 50603 states and 196253 transitions. Word has length 30 [2021-06-05 17:09:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:22,591 INFO L482 AbstractCegarLoop]: Abstraction has 50603 states and 196253 transitions. [2021-06-05 17:09:22,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:09:22,591 INFO L276 IsEmpty]: Start isEmpty. Operand 50603 states and 196253 transitions. [2021-06-05 17:09:22,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:22,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:22,696 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 17:09:22,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:22,897 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1490477859, now seen corresponding path program 206 times [2021-06-05 17:09:22,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:22,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831582942] [2021-06-05 17:09:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:23,041 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 17:09:23,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:23,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831582942] [2021-06-05 17:09:23,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831582942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:23,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010620640] [2021-06-05 17:09:23,042 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:23,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:23,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:23,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:09:23,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:23,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:23,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:23,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:23,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:23,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:23,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:23,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:09:23,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:09:23,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:23,340 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 17:09:23,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 17:09:23,358 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 17:09:23,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010620640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:23,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:23,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:09:23,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721058204] [2021-06-05 17:09:23,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:09:23,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:23,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:09:23,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:09:23,359 INFO L87 Difference]: Start difference. First operand 50603 states and 196253 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 17:09:25,955 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 17:09:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:27,787 INFO L93 Difference]: Finished difference Result 88595 states and 329278 transitions. [2021-06-05 17:09:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 17:09:27,787 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-06-05 17:09:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:28,021 INFO L225 Difference]: With dead ends: 88595 [2021-06-05 17:09:28,022 INFO L226 Difference]: Without dead ends: 88580 [2021-06-05 17:09:28,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 3149.3ms TimeCoverageRelationStatistics Valid=752, Invalid=6054, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 17:09:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88580 states. [2021-06-05 17:09:29,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88580 to 50612. [2021-06-05 17:09:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50612 states, 50611 states have (on average 3.878208294639505) internal successors, (196280), 50611 states have internal predecessors, (196280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50612 states to 50612 states and 196280 transitions. [2021-06-05 17:09:29,995 INFO L78 Accepts]: Start accepts. Automaton has 50612 states and 196280 transitions. Word has length 30 [2021-06-05 17:09:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:29,995 INFO L482 AbstractCegarLoop]: Abstraction has 50612 states and 196280 transitions. [2021-06-05 17:09:29,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 17:09:29,995 INFO L276 IsEmpty]: Start isEmpty. Operand 50612 states and 196280 transitions. [2021-06-05 17:09:30,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:30,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:30,078 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:30,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-05 17:09:30,278 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:30,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:30,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1594859171, now seen corresponding path program 91 times [2021-06-05 17:09:30,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:30,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875440063] [2021-06-05 17:09:30,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:30,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:30,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875440063] [2021-06-05 17:09:30,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875440063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:30,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971047898] [2021-06-05 17:09:30,615 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:30,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:09:30,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:30,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:30,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:30,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:30,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:30,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:30,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:30,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:30,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:30,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:09:30,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:09:30,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:30,870 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 17:09:30,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-06-05 17:09:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:30,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971047898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:30,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:30,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 17:09:30,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322189175] [2021-06-05 17:09:30,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:09:30,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:09:30,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:09:30,887 INFO L87 Difference]: Start difference. First operand 50612 states and 196280 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:32,081 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2021-06-05 17:09:33,182 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-05 17:09:33,536 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-06-05 17:09:33,942 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-06-05 17:09:34,112 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-06-05 17:09:35,111 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-06-05 17:09:36,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:36,587 INFO L93 Difference]: Finished difference Result 64130 states and 241390 transitions. [2021-06-05 17:09:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:09:36,587 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:09:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:36,768 INFO L225 Difference]: With dead ends: 64130 [2021-06-05 17:09:36,768 INFO L226 Difference]: Without dead ends: 64115 [2021-06-05 17:09:36,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 4632.2ms TimeCoverageRelationStatistics Valid=783, Invalid=4767, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 17:09:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64115 states. [2021-06-05 17:09:37,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64115 to 50612. [2021-06-05 17:09:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50612 states, 50611 states have (on average 3.878208294639505) internal successors, (196280), 50611 states have internal predecessors, (196280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50612 states to 50612 states and 196280 transitions. [2021-06-05 17:09:38,208 INFO L78 Accepts]: Start accepts. Automaton has 50612 states and 196280 transitions. Word has length 30 [2021-06-05 17:09:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:38,209 INFO L482 AbstractCegarLoop]: Abstraction has 50612 states and 196280 transitions. [2021-06-05 17:09:38,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:38,209 INFO L276 IsEmpty]: Start isEmpty. Operand 50612 states and 196280 transitions. [2021-06-05 17:09:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:38,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:38,294 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:38,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable785 [2021-06-05 17:09:38,495 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:38,495 INFO L82 PathProgramCache]: Analyzing trace with hash -344679385, now seen corresponding path program 92 times [2021-06-05 17:09:38,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:38,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303001954] [2021-06-05 17:09:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:38,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:38,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303001954] [2021-06-05 17:09:38,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303001954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:38,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110425685] [2021-06-05 17:09:38,848 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:38,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:38,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:38,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:09:38,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:39,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:39,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:39,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:39,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:39,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:39,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:09:39,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:09:39,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:39,094 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 17:09:39,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-06-05 17:09:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:39,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110425685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:39,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:39,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 17:09:39,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350029613] [2021-06-05 17:09:39,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:09:39,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:39,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:09:39,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:09:39,111 INFO L87 Difference]: Start difference. First operand 50612 states and 196280 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:40,615 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-06-05 17:09:41,389 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-06-05 17:09:41,764 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-06-05 17:09:42,082 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2021-06-05 17:09:42,220 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-06-05 17:09:43,172 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2021-06-05 17:09:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:44,761 INFO L93 Difference]: Finished difference Result 64415 states and 242251 transitions. [2021-06-05 17:09:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:09:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 17:09:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:44,945 INFO L225 Difference]: With dead ends: 64415 [2021-06-05 17:09:44,945 INFO L226 Difference]: Without dead ends: 64400 [2021-06-05 17:09:44,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 4462.5ms TimeCoverageRelationStatistics Valid=826, Invalid=4724, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 17:09:45,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64400 states. [2021-06-05 17:09:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64400 to 50619. [2021-06-05 17:09:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50619 states, 50618 states have (on average 3.878323916393378) internal successors, (196313), 50618 states have internal predecessors, (196313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50619 states to 50619 states and 196313 transitions. [2021-06-05 17:09:46,319 INFO L78 Accepts]: Start accepts. Automaton has 50619 states and 196313 transitions. Word has length 30 [2021-06-05 17:09:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:46,320 INFO L482 AbstractCegarLoop]: Abstraction has 50619 states and 196313 transitions. [2021-06-05 17:09:46,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 50619 states and 196313 transitions. [2021-06-05 17:09:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:46,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:46,405 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:46,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:46,606 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:46,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1320998229, now seen corresponding path program 93 times [2021-06-05 17:09:46,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:46,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241725204] [2021-06-05 17:09:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:46,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:46,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241725204] [2021-06-05 17:09:46,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241725204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:46,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794321420] [2021-06-05 17:09:46,872 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:46,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:09:46,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:46,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:09:46,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:47,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:47,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:47,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:47,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:47,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:47,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:47,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:47,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 67 [2021-06-05 17:09:47,183 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:09:47,201 INFO L628 ElimStorePlain]: treesize reduction 19, result has 54.8 percent of original size [2021-06-05 17:09:47,229 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 17:09:47,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:35 [2021-06-05 17:09:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:47,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794321420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:47,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:47,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 17:09:47,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792286938] [2021-06-05 17:09:47,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 17:09:47,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:47,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 17:09:47,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:09:47,303 INFO L87 Difference]: Start difference. First operand 50619 states and 196313 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 17:09:48,365 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-05 17:09:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:50,817 INFO L93 Difference]: Finished difference Result 88005 states and 327696 transitions. [2021-06-05 17:09:50,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:09:50,817 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 17:09:50,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:51,310 INFO L225 Difference]: With dead ends: 88005 [2021-06-05 17:09:51,310 INFO L226 Difference]: Without dead ends: 87990 [2021-06-05 17:09:51,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 2505.8ms TimeCoverageRelationStatistics Valid=444, Invalid=3338, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:09:51,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87990 states. [2021-06-05 17:09:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87990 to 50624. [2021-06-05 17:09:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50624 states, 50623 states have (on average 3.878217411058215) internal successors, (196327), 50623 states have internal predecessors, (196327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50624 states to 50624 states and 196327 transitions. [2021-06-05 17:09:52,774 INFO L78 Accepts]: Start accepts. Automaton has 50624 states and 196327 transitions. Word has length 30 [2021-06-05 17:09:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:52,774 INFO L482 AbstractCegarLoop]: Abstraction has 50624 states and 196327 transitions. [2021-06-05 17:09:52,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 17:09:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 50624 states and 196327 transitions. [2021-06-05 17:09:52,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:52,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:52,856 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 17:09:53,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable787 [2021-06-05 17:09:53,057 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:53,057 INFO L82 PathProgramCache]: Analyzing trace with hash 241742567, now seen corresponding path program 207 times [2021-06-05 17:09:53,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:53,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832013089] [2021-06-05 17:09:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:53,211 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 17:09:53,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:53,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832013089] [2021-06-05 17:09:53,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832013089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:53,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374850949] [2021-06-05 17:09:53,212 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:53,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:09:53,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:53,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:09:53,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:53,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:53,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:53,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 85 Received shutdown request... [2021-06-05 17:09:56,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable811,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:56,262 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 17:09:56,263 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 17:09:56,265 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 17:09:56,265 INFO L202 PluginConnector]: Adding new model sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:09:56 BasicIcfg [2021-06-05 17:09:56,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 17:09:56,266 INFO L168 Benchmark]: Toolchain (without parser) took 756135.97 ms. Allocated memory was 350.2 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 329.6 MB in the beginning and 9.6 GB in the end (delta: -9.3 GB). Peak memory consumption was 6.5 GB. Max. memory is 16.0 GB. [2021-06-05 17:09:56,266 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 350.2 MB. Free memory is still 330.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:09:56,266 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.40 ms. Allocated memory is still 350.2 MB. Free memory was 329.5 MB in the beginning and 328.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:09:56,267 INFO L168 Benchmark]: Boogie Preprocessor took 14.20 ms. Allocated memory is still 350.2 MB. Free memory was 328.0 MB in the beginning and 327.2 MB in the end (delta: 881.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 17:09:56,267 INFO L168 Benchmark]: RCFGBuilder took 293.44 ms. Allocated memory is still 350.2 MB. Free memory was 327.0 MB in the beginning and 314.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 17:09:56,267 INFO L168 Benchmark]: TraceAbstraction took 755794.54 ms. Allocated memory was 350.2 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 313.8 MB in the beginning and 9.6 GB in the end (delta: -9.3 GB). Peak memory consumption was 6.5 GB. Max. memory is 16.0 GB. [2021-06-05 17:09:56,267 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 350.2 MB. Free memory is still 330.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.40 ms. Allocated memory is still 350.2 MB. Free memory was 329.5 MB in the beginning and 328.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.20 ms. Allocated memory is still 350.2 MB. Free memory was 328.0 MB in the beginning and 327.2 MB in the end (delta: 881.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 293.44 ms. Allocated memory is still 350.2 MB. Free memory was 327.0 MB in the beginning and 314.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 755794.54 ms. Allocated memory was 350.2 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 313.8 MB in the beginning and 9.6 GB in the end (delta: -9.3 GB). Peak memory consumption was 6.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: 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 TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - TimeoutResultAtElement [Line: 58]: 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 TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - TimeoutResultAtElement [Line: 58]: 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 TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - 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: 755671.1ms, OverallIterations: 303, TraceHistogramMax: 3, EmptinessCheckTime: 9574.3ms, AutomataDifference: 419676.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15218 SDtfs, 83900 SDslu, 130308 SDs, 0 SdLazy, 225198 SolverSat, 15008 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 108327.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20421 GetRequests, 6341 SyntacticMatches, 395 SemanticMatches, 13685 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246571 ImplicationChecksByTransitivity, 273105.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55585occurred in iteration=253, InterpolantAutomatonStates: 12060, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 167331.2ms AutomataMinimizationTime, 302 MinimizatonAttempts, 2642135 StatesRemovedByMinimization, 302 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 944.5ms SsaConstructionTime, 2864.0ms SatisfiabilityAnalysisTime, 84284.0ms InterpolantComputationTime, 16334 NumberOfCodeBlocks, 16334 NumberOfCodeBlocksAsserted, 1048 NumberOfCheckSat, 15733 ConstructedInterpolants, 416 QuantifiedInterpolants, 173170 SizeOfPredicates, 1315 NumberOfNonLiveVariables, 20644 ConjunctsInSsa, 5022 ConjunctsInUnsatCore, 601 InterpolantComputations, 3 PerfectInterpolantSequences, 1055/5634 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