/usr/bin/java -Xmx8000000000 -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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:33:47,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:33:47,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:33:47,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:33:47,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:33:47,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:33:47,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:33:47,930 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.epf [2021-07-09 18:33:47,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:33:47,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:33:47,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:33:47,958 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:33:47,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:33:47,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:33:47,959 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:33:47,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:33:47,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:33:47,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:33:47,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:33:47,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:33:47,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:33:47,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:33:47,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:33:47,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:33:47,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:33:47,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:33:47,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:33:47,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:33:47,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:33:47,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:33:47,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:33:47,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:33:47,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:33:47,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:33:47,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:33:47,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:33:47,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:33:47,962 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:33:47,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:33:47,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:33:48,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:33:48,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:33:48,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:33:48,238 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:33:48,240 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:33:48,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl [2021-07-09 18:33:48,241 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl' [2021-07-09 18:33:48,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:33:48,268 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:33:48,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:33:48,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:33:48,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:33:48,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:48" (1/1) ... [2021-07-09 18:33:48,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:48" (1/1) ... [2021-07-09 18:33:48,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:33:48,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:33:48,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:33:48,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:33:48,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:48" (1/1) ... [2021-07-09 18:33:48,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:48" (1/1) ... [2021-07-09 18:33:48,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:48" (1/1) ... [2021-07-09 18:33:48,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:48" (1/1) ... [2021-07-09 18:33:48,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:48" (1/1) ... [2021-07-09 18:33:48,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:48" (1/1) ... [2021-07-09 18:33:48,305 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:48" (1/1) ... [2021-07-09 18:33:48,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:33:48,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:33:48,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:33:48,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:33:48,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:48" (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 [2021-07-09 18:33:48,377 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:33:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:33:48,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:33:48,378 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:33:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:33:48,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:33:48,378 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:33:48,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:33:48,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:33:48,379 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:33:48,379 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:33:48,379 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:33:48,379 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:33:48,539 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:33:48,539 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:33:48,540 INFO L202 PluginConnector]: Adding new model min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:33:48 BoogieIcfgContainer [2021-07-09 18:33:48,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:33:48,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:33:48,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:33:48,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:33:48,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:33:48" (1/2) ... [2021-07-09 18:33:48,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b26cf85 and model type min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:33:48, skipping insertion in model container [2021-07-09 18:33:48,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:33:48" (2/2) ... [2021-07-09 18:33:48,545 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun-alt.wvr.bpl [2021-07-09 18:33:48,548 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:33:48,548 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:33:48,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:33:48,549 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:33:48,573 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:33:48,587 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:33:48,599 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:33:48,599 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:33:48,599 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:33:48,599 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:33:48,599 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:33:48,599 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:33:48,599 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:33:48,599 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:33:48,605 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-09 18:33:48,624 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:48,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:48,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:33:48,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:48,633 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:48,633 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:48,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-07-09 18:33:48,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:48,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550113866] [2021-07-09 18:33:48,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:48,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:48,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550113866] [2021-07-09 18:33:48,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550113866] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:33:48,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:33:48,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:33:48,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009082149] [2021-07-09 18:33:48,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:33:48,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:48,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:33:48,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:33:48,817 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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) [2021-07-09 18:33:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:48,866 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-07-09 18:33:48,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:33:48,868 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 [2021-07-09 18:33:48,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:48,879 INFO L225 Difference]: With dead ends: 217 [2021-07-09 18:33:48,879 INFO L226 Difference]: Without dead ends: 202 [2021-07-09 18:33:48,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:33:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-09 18:33:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-07-09 18:33:48,930 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) [2021-07-09 18:33:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-07-09 18:33:48,934 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-07-09 18:33:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:48,935 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-07-09 18:33:48,935 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) [2021-07-09 18:33:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-07-09 18:33:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:33:48,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:48,940 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:48,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:33:48,942 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:48,944 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-07-09 18:33:48,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:48,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762387247] [2021-07-09 18:33:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:33:49,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:49,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762387247] [2021-07-09 18:33:49,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762387247] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:33:49,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:33:49,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:33:49,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445478519] [2021-07-09 18:33:49,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:33:49,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:49,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:33:49,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:33:49,017 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) [2021-07-09 18:33:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:49,053 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-07-09 18:33:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:33:49,055 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 [2021-07-09 18:33:49,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:49,057 INFO L225 Difference]: With dead ends: 158 [2021-07-09 18:33:49,057 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 18:33:49,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:33:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 18:33:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-07-09 18:33:49,062 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) [2021-07-09 18:33:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-09 18:33:49,063 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-07-09 18:33:49,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:49,063 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-09 18:33:49,063 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) [2021-07-09 18:33:49,063 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-09 18:33:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:33:49,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:49,064 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:49,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:33:49,064 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:49,065 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-07-09 18:33:49,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:49,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887067859] [2021-07-09 18:33:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:33:49,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:49,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887067859] [2021-07-09 18:33:49,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887067859] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:33:49,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:33:49,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:33:49,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416264600] [2021-07-09 18:33:49,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:33:49,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:49,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:33:49,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:33:49,115 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) [2021-07-09 18:33:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:49,161 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-07-09 18:33:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:33:49,162 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 [2021-07-09 18:33:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:49,165 INFO L225 Difference]: With dead ends: 183 [2021-07-09 18:33:49,167 INFO L226 Difference]: Without dead ends: 183 [2021-07-09 18:33:49,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:33:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-09 18:33:49,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-07-09 18:33:49,176 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) [2021-07-09 18:33:49,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-09 18:33:49,176 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-09 18:33:49,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:49,176 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-09 18:33:49,177 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) [2021-07-09 18:33:49,177 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-09 18:33:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:33:49,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:49,177 INFO L508 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] [2021-07-09 18:33:49,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:33:49,178 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:49,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:49,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-07-09 18:33:49,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:49,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278171565] [2021-07-09 18:33:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:49,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:49,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278171565] [2021-07-09 18:33:49,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278171565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:49,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453279912] [2021-07-09 18:33:49,482 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 [2021-07-09 18:33:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:49,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:33:49,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:49,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:33:49,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:49,820 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 18 treesize of output 12 [2021-07-09 18:33:49,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:49,833 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 16 treesize of output 10 [2021-07-09 18:33:49,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:49,841 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 23 treesize of output 15 [2021-07-09 18:33:49,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:49,848 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 23 treesize of output 15 [2021-07-09 18:33:49,850 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:49,852 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 16 treesize of output 10 [2021-07-09 18:33:49,854 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:49,876 INFO L628 ElimStorePlain]: treesize reduction 18, result has 58.1 percent of original size [2021-07-09 18:33:49,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:49,883 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:178, output treesize:17 [2021-07-09 18:33:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:49,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453279912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:49,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:49,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:33:49,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856230618] [2021-07-09 18:33:49,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:33:49,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:49,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:33:49,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:33:49,911 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-09 18:33:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:50,141 INFO L93 Difference]: Finished difference Result 298 states and 839 transitions. [2021-07-09 18:33:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:33:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 22 [2021-07-09 18:33:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:50,143 INFO L225 Difference]: With dead ends: 298 [2021-07-09 18:33:50,143 INFO L226 Difference]: Without dead ends: 283 [2021-07-09 18:33:50,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:33:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-09 18:33:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 224. [2021-07-09 18:33:50,151 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) [2021-07-09 18:33:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-09 18:33:50,151 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-09 18:33:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:50,152 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-09 18:33:50,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-07-09 18:33:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-09 18:33:50,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:33:50,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:50,153 INFO L508 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] [2021-07-09 18:33:50,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:50,361 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-07-09 18:33:50,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:50,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813759703] [2021-07-09 18:33:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:50,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:50,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813759703] [2021-07-09 18:33:50,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813759703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:50,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282117373] [2021-07-09 18:33:50,594 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 [2021-07-09 18:33:50,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:50,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:50,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:33:50,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:50,854 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:50,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:33:50,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:50,866 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:50,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:33:50,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:50,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:50,876 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 [2021-07-09 18:33:50,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:50,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:50,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:33:50,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:50,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:50,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:33:50,947 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:124, output treesize:116 [2021-07-09 18:33:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:51,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282117373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:51,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:51,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-07-09 18:33:51,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733310307] [2021-07-09 18:33:51,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:33:51,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:51,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:33:51,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:33:51,081 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:51,562 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-07-09 18:33:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:33:51,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:33:51,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:51,567 INFO L225 Difference]: With dead ends: 374 [2021-07-09 18:33:51,567 INFO L226 Difference]: Without dead ends: 359 [2021-07-09 18:33:51,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 627.3ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:33:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-09 18:33:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-07-09 18:33:51,574 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) [2021-07-09 18:33:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-09 18:33:51,574 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-09 18:33:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:51,579 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-09 18:33:51,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:51,580 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-09 18:33:51,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:33:51,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:51,580 INFO L508 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] [2021-07-09 18:33:51,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:33:51,781 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:51,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:51,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-07-09 18:33:51,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:51,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158879703] [2021-07-09 18:33:51,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:51,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:51,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158879703] [2021-07-09 18:33:51,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158879703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:51,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741255567] [2021-07-09 18:33:51,933 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 [2021-07-09 18:33:51,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:33:51,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:51,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:33:51,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:52,078 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 16 treesize of output 10 [2021-07-09 18:33:52,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:52,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:33:52,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:52,084 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 16 treesize of output 10 [2021-07-09 18:33:52,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:52,087 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 18 treesize of output 12 [2021-07-09 18:33:52,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:52,090 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 23 treesize of output 15 [2021-07-09 18:33:52,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:52,093 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 23 treesize of output 15 [2021-07-09 18:33:52,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:52,107 INFO L628 ElimStorePlain]: treesize reduction 10, result has 63.0 percent of original size [2021-07-09 18:33:52,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:52,108 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:130, output treesize:17 [2021-07-09 18:33:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:52,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741255567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:52,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:52,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:33:52,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516814611] [2021-07-09 18:33:52,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:33:52,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:52,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:33:52,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:33:52,136 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) 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) [2021-07-09 18:33:52,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:52,290 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-07-09 18:33:52,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:33:52,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) 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 22 [2021-07-09 18:33:52,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:52,292 INFO L225 Difference]: With dead ends: 363 [2021-07-09 18:33:52,292 INFO L226 Difference]: Without dead ends: 348 [2021-07-09 18:33:52,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:33:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-09 18:33:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-07-09 18:33:52,298 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) [2021-07-09 18:33:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-09 18:33:52,299 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-09 18:33:52,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:52,299 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-09 18:33:52,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) 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) [2021-07-09 18:33:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-09 18:33:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:33:52,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:52,300 INFO L508 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] [2021-07-09 18:33:52,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:52,513 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-07-09 18:33:52,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:52,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225892804] [2021-07-09 18:33:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:52,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:52,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225892804] [2021-07-09 18:33:52,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225892804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:52,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989368280] [2021-07-09 18:33:52,650 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 [2021-07-09 18:33:52,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:52,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:52,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:33:52,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:52,856 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:52,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:33:52,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:52,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:52,865 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 [2021-07-09 18:33:52,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:52,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:52,920 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:33:52,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-07-09 18:33:52,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:52,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:52,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:33:52,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:52,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:52,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:33:52,970 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:71 [2021-07-09 18:33:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:53,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989368280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:53,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:53,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:33:53,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042653818] [2021-07-09 18:33:53,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:33:53,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:53,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:33:53,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:53,048 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:53,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:53,322 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-07-09 18:33:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:33:53,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:33:53,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:53,324 INFO L225 Difference]: With dead ends: 425 [2021-07-09 18:33:53,324 INFO L226 Difference]: Without dead ends: 410 [2021-07-09 18:33:53,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:33:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-09 18:33:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-07-09 18:33:53,330 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) [2021-07-09 18:33:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-09 18:33:53,331 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-09 18:33:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:53,331 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-09 18:33:53,331 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) [2021-07-09 18:33:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-09 18:33:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:33:53,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:53,332 INFO L508 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] [2021-07-09 18:33:53,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:53,548 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:53,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:53,549 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-07-09 18:33:53,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:53,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536143309] [2021-07-09 18:33:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:53,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:53,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536143309] [2021-07-09 18:33:53,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536143309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:53,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067617776] [2021-07-09 18:33:53,591 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 [2021-07-09 18:33:53,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:33:53,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:53,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:33:53,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:53,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067617776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:53,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:53,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:33:53,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25138822] [2021-07-09 18:33:53,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:33:53,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:53,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:33:53,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:33:53,685 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) [2021-07-09 18:33:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:54,052 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-09 18:33:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:33:54,053 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 [2021-07-09 18:33:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:54,055 INFO L225 Difference]: With dead ends: 619 [2021-07-09 18:33:54,055 INFO L226 Difference]: Without dead ends: 619 [2021-07-09 18:33:54,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:33:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-09 18:33:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-09 18:33:54,062 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) [2021-07-09 18:33:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-09 18:33:54,063 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-09 18:33:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:54,064 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-09 18:33:54,064 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) [2021-07-09 18:33:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-09 18:33:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:33:54,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:54,066 INFO L508 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] [2021-07-09 18:33:54,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 18:33:54,281 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:54,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:54,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-07-09 18:33:54,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:54,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064226523] [2021-07-09 18:33:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:54,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:54,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064226523] [2021-07-09 18:33:54,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064226523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:54,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128565945] [2021-07-09 18:33:54,338 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 [2021-07-09 18:33:54,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:33:54,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:54,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:33:54,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:54,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128565945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:54,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:54,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:33:54,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579581492] [2021-07-09 18:33:54,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:33:54,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:54,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:33:54,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:54,465 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) [2021-07-09 18:33:55,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:55,204 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-09 18:33:55,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:33:55,204 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 [2021-07-09 18:33:55,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:55,208 INFO L225 Difference]: With dead ends: 1078 [2021-07-09 18:33:55,208 INFO L226 Difference]: Without dead ends: 1078 [2021-07-09 18:33:55,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:33:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-09 18:33:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-09 18:33:55,218 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) [2021-07-09 18:33:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-09 18:33:55,219 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-09 18:33:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:55,220 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-09 18:33:55,220 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) [2021-07-09 18:33:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-09 18:33:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:33:55,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:55,222 INFO L508 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] [2021-07-09 18:33:55,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:55,436 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:55,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-07-09 18:33:55,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:55,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023749868] [2021-07-09 18:33:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:55,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:55,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023749868] [2021-07-09 18:33:55,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023749868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:55,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002735480] [2021-07-09 18:33:55,487 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 [2021-07-09 18:33:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:55,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:33:55,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:55,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002735480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:55,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:55,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:33:55,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795224238] [2021-07-09 18:33:55,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:33:55,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:55,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:33:55,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:55,601 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) [2021-07-09 18:33:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:56,232 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-09 18:33:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:33:56,232 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 [2021-07-09 18:33:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:56,236 INFO L225 Difference]: With dead ends: 951 [2021-07-09 18:33:56,236 INFO L226 Difference]: Without dead ends: 951 [2021-07-09 18:33:56,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 394.3ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:33:56,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-09 18:33:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-09 18:33:56,261 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) [2021-07-09 18:33:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-09 18:33:56,262 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-09 18:33:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:56,262 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-09 18:33:56,262 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) [2021-07-09 18:33:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-09 18:33:56,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:33:56,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:56,263 INFO L508 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] [2021-07-09 18:33:56,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:56,473 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:56,473 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-07-09 18:33:56,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:56,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850608467] [2021-07-09 18:33:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:33:56,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:56,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850608467] [2021-07-09 18:33:56,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850608467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:56,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448487428] [2021-07-09 18:33:56,495 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 [2021-07-09 18:33:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:56,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:33:56,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:33:56,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448487428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:56,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:56,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:33:56,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893432039] [2021-07-09 18:33:56,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:33:56,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:56,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:33:56,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:33:56,575 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) [2021-07-09 18:33:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:56,677 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-09 18:33:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:33:56,678 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 [2021-07-09 18:33:56,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:56,682 INFO L225 Difference]: With dead ends: 669 [2021-07-09 18:33:56,682 INFO L226 Difference]: Without dead ends: 663 [2021-07-09 18:33:56,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-09 18:33:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-09 18:33:56,690 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) [2021-07-09 18:33:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-09 18:33:56,691 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-09 18:33:56,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:56,692 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-09 18:33:56,692 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) [2021-07-09 18:33:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-09 18:33:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:33:56,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:56,693 INFO L508 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] [2021-07-09 18:33:56,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:33:56,901 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:56,901 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-07-09 18:33:56,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:56,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512391734] [2021-07-09 18:33:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:56,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:56,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512391734] [2021-07-09 18:33:56,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512391734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:56,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415794616] [2021-07-09 18:33:56,939 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 [2021-07-09 18:33:56,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:56,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:56,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:33:56,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:57,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415794616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:57,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:57,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:33:57,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428719787] [2021-07-09 18:33:57,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:33:57,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:57,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:33:57,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:57,052 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) [2021-07-09 18:33:57,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:57,224 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-09 18:33:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:33:57,225 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 [2021-07-09 18:33:57,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:57,227 INFO L225 Difference]: With dead ends: 710 [2021-07-09 18:33:57,227 INFO L226 Difference]: Without dead ends: 672 [2021-07-09 18:33:57,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:33:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-09 18:33:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-09 18:33:57,237 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) [2021-07-09 18:33:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-09 18:33:57,239 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-09 18:33:57,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:57,239 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-09 18:33:57,239 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) [2021-07-09 18:33:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-09 18:33:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:33:57,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:57,240 INFO L508 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] [2021-07-09 18:33:57,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:57,457 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:57,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:57,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-07-09 18:33:57,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:57,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45580972] [2021-07-09 18:33:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:33:57,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:57,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45580972] [2021-07-09 18:33:57,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45580972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:57,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710165734] [2021-07-09 18:33:57,494 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 [2021-07-09 18:33:57,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:57,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:57,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:33:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:33:57,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710165734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:57,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:57,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:33:57,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155259379] [2021-07-09 18:33:57,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:33:57,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:57,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:33:57,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:33:57,571 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) [2021-07-09 18:33:57,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:57,675 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-09 18:33:57,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:33:57,675 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 [2021-07-09 18:33:57,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:57,678 INFO L225 Difference]: With dead ends: 830 [2021-07-09 18:33:57,678 INFO L226 Difference]: Without dead ends: 830 [2021-07-09 18:33:57,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-09 18:33:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-09 18:33:57,689 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) [2021-07-09 18:33:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-09 18:33:57,690 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-09 18:33:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:57,691 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-09 18:33:57,691 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) [2021-07-09 18:33:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-09 18:33:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:33:57,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:57,692 INFO L508 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] [2021-07-09 18:33:57,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:57,907 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-07-09 18:33:57,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:57,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821707760] [2021-07-09 18:33:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:57,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:57,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821707760] [2021-07-09 18:33:57,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821707760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:57,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693817060] [2021-07-09 18:33:57,941 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 [2021-07-09 18:33:57,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:33:57,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:57,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:33:57,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:58,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693817060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:58,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:58,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:33:58,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696581703] [2021-07-09 18:33:58,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:33:58,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:58,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:33:58,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:33:58,038 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) [2021-07-09 18:33:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:58,319 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-09 18:33:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:33:58,325 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 [2021-07-09 18:33:58,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:58,329 INFO L225 Difference]: With dead ends: 1196 [2021-07-09 18:33:58,329 INFO L226 Difference]: Without dead ends: 1196 [2021-07-09 18:33:58,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:33:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-09 18:33:58,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-09 18:33:58,343 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) [2021-07-09 18:33:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-09 18:33:58,345 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-09 18:33:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:58,345 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-09 18:33:58,345 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) [2021-07-09 18:33:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-09 18:33:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:33:58,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:58,346 INFO L508 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] [2021-07-09 18:33:58,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 18:33:58,561 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:58,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-07-09 18:33:58,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:58,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221576751] [2021-07-09 18:33:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:58,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:58,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221576751] [2021-07-09 18:33:58,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221576751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:58,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565797464] [2021-07-09 18:33:58,598 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 [2021-07-09 18:33:58,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:58,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:58,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:33:58,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:58,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565797464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:58,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:58,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:33:58,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432402752] [2021-07-09 18:33:58,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:33:58,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:58,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:33:58,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:33:58,700 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) [2021-07-09 18:33:59,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:59,105 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-09 18:33:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:33:59,105 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 [2021-07-09 18:33:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:59,111 INFO L225 Difference]: With dead ends: 1492 [2021-07-09 18:33:59,111 INFO L226 Difference]: Without dead ends: 1492 [2021-07-09 18:33:59,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:33:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-09 18:33:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-09 18:33:59,126 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) [2021-07-09 18:33:59,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-09 18:33:59,128 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-09 18:33:59,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:59,128 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-09 18:33:59,128 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) [2021-07-09 18:33:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-09 18:33:59,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:33:59,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:59,129 INFO L508 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] [2021-07-09 18:33:59,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 18:33:59,343 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:59,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-07-09 18:33:59,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:59,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372913811] [2021-07-09 18:33:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:59,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:59,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372913811] [2021-07-09 18:33:59,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372913811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:59,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97852397] [2021-07-09 18:33:59,377 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 [2021-07-09 18:33:59,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:59,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:59,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:33:59,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:59,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97852397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:59,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:59,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:33:59,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525095077] [2021-07-09 18:33:59,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:33:59,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:33:59,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:33:59,475 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) [2021-07-09 18:33:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:59,711 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-09 18:33:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:33:59,711 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 [2021-07-09 18:33:59,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:59,715 INFO L225 Difference]: With dead ends: 1258 [2021-07-09 18:33:59,715 INFO L226 Difference]: Without dead ends: 1248 [2021-07-09 18:33:59,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:33:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-09 18:33:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-09 18:33:59,729 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) [2021-07-09 18:33:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-09 18:33:59,731 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-09 18:33:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:59,731 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-09 18:33:59,731 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) [2021-07-09 18:33:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-09 18:33:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:33:59,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:59,732 INFO L508 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] [2021-07-09 18:33:59,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-09 18:33:59,949 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:59,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-07-09 18:33:59,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:59,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189621615] [2021-07-09 18:33:59,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:59,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:59,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189621615] [2021-07-09 18:33:59,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189621615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:59,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010266121] [2021-07-09 18:33:59,987 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 [2021-07-09 18:34:00,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:00,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:00,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:00,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:00,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010266121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:00,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:00,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:34:00,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090656891] [2021-07-09 18:34:00,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:00,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:00,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:00,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:00,088 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) [2021-07-09 18:34:00,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:00,336 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-09 18:34:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:34:00,336 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 [2021-07-09 18:34:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:00,341 INFO L225 Difference]: With dead ends: 1329 [2021-07-09 18:34:00,341 INFO L226 Difference]: Without dead ends: 1329 [2021-07-09 18:34:00,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-09 18:34:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-09 18:34:00,354 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) [2021-07-09 18:34:00,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-09 18:34:00,356 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-09 18:34:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:00,356 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-09 18:34:00,356 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) [2021-07-09 18:34:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-09 18:34:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:00,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:00,357 INFO L508 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] [2021-07-09 18:34:00,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:00,573 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:00,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-07-09 18:34:00,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:00,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890890137] [2021-07-09 18:34:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:00,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:00,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890890137] [2021-07-09 18:34:00,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890890137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:00,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460094756] [2021-07-09 18:34:00,613 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 [2021-07-09 18:34:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:00,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:00,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:00,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460094756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:00,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:00,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:00,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77757675] [2021-07-09 18:34:00,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:34:00,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:00,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:34:00,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:00,694 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) [2021-07-09 18:34:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:01,020 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-09 18:34:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:34:01,024 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 [2021-07-09 18:34:01,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:01,030 INFO L225 Difference]: With dead ends: 1548 [2021-07-09 18:34:01,030 INFO L226 Difference]: Without dead ends: 1544 [2021-07-09 18:34:01,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:34:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-09 18:34:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-09 18:34:01,047 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) [2021-07-09 18:34:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-09 18:34:01,048 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-09 18:34:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:01,048 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-09 18:34:01,049 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) [2021-07-09 18:34:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-09 18:34:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:01,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:01,050 INFO L508 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] [2021-07-09 18:34:01,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:01,265 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:01,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:01,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-07-09 18:34:01,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:01,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420162216] [2021-07-09 18:34:01,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:01,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:01,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420162216] [2021-07-09 18:34:01,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420162216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:01,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195834763] [2021-07-09 18:34:01,307 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 [2021-07-09 18:34:01,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:01,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:01,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:01,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:01,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195834763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:01,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:01,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:01,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164302251] [2021-07-09 18:34:01,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:01,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:01,412 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) [2021-07-09 18:34:02,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:02,101 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-09 18:34:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:34:02,101 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 [2021-07-09 18:34:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:02,111 INFO L225 Difference]: With dead ends: 2734 [2021-07-09 18:34:02,111 INFO L226 Difference]: Without dead ends: 2734 [2021-07-09 18:34:02,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 423.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:34:02,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-09 18:34:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-09 18:34:02,137 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) [2021-07-09 18:34:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-09 18:34:02,139 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-09 18:34:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:02,139 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-09 18:34:02,139 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) [2021-07-09 18:34:02,139 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-09 18:34:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:02,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:02,141 INFO L508 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] [2021-07-09 18:34:02,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:02,357 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:02,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-07-09 18:34:02,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:02,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515405752] [2021-07-09 18:34:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:02,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:02,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515405752] [2021-07-09 18:34:02,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515405752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:02,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123419723] [2021-07-09 18:34:02,391 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 [2021-07-09 18:34:02,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:02,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:02,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:02,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:02,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123419723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:02,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:02,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:02,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282667996] [2021-07-09 18:34:02,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:02,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:02,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:02,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:02,508 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) [2021-07-09 18:34:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:03,194 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-09 18:34:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:34:03,195 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 [2021-07-09 18:34:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:03,201 INFO L225 Difference]: With dead ends: 2693 [2021-07-09 18:34:03,201 INFO L226 Difference]: Without dead ends: 2693 [2021-07-09 18:34:03,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:34:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-09 18:34:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-09 18:34:03,225 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) [2021-07-09 18:34:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-09 18:34:03,227 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-09 18:34:03,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:03,227 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-09 18:34:03,227 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) [2021-07-09 18:34:03,227 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-09 18:34:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:03,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:03,229 INFO L508 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] [2021-07-09 18:34:03,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 18:34:03,437 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:03,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-07-09 18:34:03,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:03,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583505425] [2021-07-09 18:34:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:03,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:03,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583505425] [2021-07-09 18:34:03,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583505425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:03,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240589458] [2021-07-09 18:34:03,482 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 [2021-07-09 18:34:03,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:03,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:03,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:03,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240589458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:03,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:03,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:34:03,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557904522] [2021-07-09 18:34:03,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:03,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:03,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:03,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:03,596 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) [2021-07-09 18:34:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:04,234 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-09 18:34:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:34:04,234 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 [2021-07-09 18:34:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:04,240 INFO L225 Difference]: With dead ends: 2677 [2021-07-09 18:34:04,240 INFO L226 Difference]: Without dead ends: 2677 [2021-07-09 18:34:04,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 378.5ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:34:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-09 18:34:04,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-09 18:34:04,264 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) [2021-07-09 18:34:04,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-09 18:34:04,266 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-09 18:34:04,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:04,266 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-09 18:34:04,266 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) [2021-07-09 18:34:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-09 18:34:04,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:04,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:04,268 INFO L508 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] [2021-07-09 18:34:04,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:34:04,485 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-07-09 18:34:04,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:04,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805566759] [2021-07-09 18:34:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:04,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:04,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805566759] [2021-07-09 18:34:04,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805566759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:04,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158426898] [2021-07-09 18:34:04,519 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 [2021-07-09 18:34:04,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:34:04,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:04,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:04,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:04,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158426898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:04,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:04,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:34:04,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351920786] [2021-07-09 18:34:04,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:04,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:04,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:04,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:04,647 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) [2021-07-09 18:34:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:05,199 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-09 18:34:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:34:05,199 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 [2021-07-09 18:34:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:05,208 INFO L225 Difference]: With dead ends: 2474 [2021-07-09 18:34:05,209 INFO L226 Difference]: Without dead ends: 2470 [2021-07-09 18:34:05,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:34:05,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-09 18:34:05,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-09 18:34:05,230 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) [2021-07-09 18:34:05,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-09 18:34:05,232 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-09 18:34:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:05,232 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-09 18:34:05,232 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) [2021-07-09 18:34:05,232 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-09 18:34:05,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:05,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:05,233 INFO L508 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] [2021-07-09 18:34:05,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:34:05,449 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:05,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-07-09 18:34:05,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:05,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063722794] [2021-07-09 18:34:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:05,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:05,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063722794] [2021-07-09 18:34:05,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063722794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:05,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406486015] [2021-07-09 18:34:05,483 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 [2021-07-09 18:34:05,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:34:05,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:05,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:05,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:05,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406486015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:05,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:05,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:05,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844015622] [2021-07-09 18:34:05,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:05,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:05,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:05,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:05,609 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) [2021-07-09 18:34:06,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:06,218 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-09 18:34:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:34:06,219 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 [2021-07-09 18:34:06,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:06,224 INFO L225 Difference]: With dead ends: 2514 [2021-07-09 18:34:06,224 INFO L226 Difference]: Without dead ends: 2514 [2021-07-09 18:34:06,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 359.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:34:06,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-09 18:34:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-09 18:34:06,246 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) [2021-07-09 18:34:06,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-09 18:34:06,249 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-09 18:34:06,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:06,249 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-09 18:34:06,249 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) [2021-07-09 18:34:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-09 18:34:06,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:06,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:06,251 INFO L508 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] [2021-07-09 18:34:06,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:34:06,467 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:06,468 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-07-09 18:34:06,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:06,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124691479] [2021-07-09 18:34:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:06,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:06,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124691479] [2021-07-09 18:34:06,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124691479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:06,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463261276] [2021-07-09 18:34:06,511 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 [2021-07-09 18:34:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:06,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:06,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463261276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:06,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:06,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:06,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465158940] [2021-07-09 18:34:06,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:06,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:06,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:06,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:06,616 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) [2021-07-09 18:34:07,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:07,228 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-09 18:34:07,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:34:07,228 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 [2021-07-09 18:34:07,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:07,233 INFO L225 Difference]: With dead ends: 2332 [2021-07-09 18:34:07,233 INFO L226 Difference]: Without dead ends: 2328 [2021-07-09 18:34:07,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 335.9ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:34:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-09 18:34:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-09 18:34:07,253 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) [2021-07-09 18:34:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-09 18:34:07,255 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-09 18:34:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:07,256 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-09 18:34:07,256 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) [2021-07-09 18:34:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-09 18:34:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:07,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:07,258 INFO L508 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] [2021-07-09 18:34:07,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 18:34:07,473 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:07,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:07,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-07-09 18:34:07,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:07,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472222375] [2021-07-09 18:34:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:07,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:07,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472222375] [2021-07-09 18:34:07,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472222375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:07,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996198851] [2021-07-09 18:34:07,498 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 [2021-07-09 18:34:07,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:34:07,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:34:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:07,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996198851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:07,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:07,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:34:07,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809780381] [2021-07-09 18:34:07,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:34:07,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:07,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:34:07,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:34:07,574 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) [2021-07-09 18:34:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:07,643 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-09 18:34:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:34:07,643 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 [2021-07-09 18:34:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:07,645 INFO L225 Difference]: With dead ends: 929 [2021-07-09 18:34:07,645 INFO L226 Difference]: Without dead ends: 929 [2021-07-09 18:34:07,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-09 18:34:07,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-09 18:34:07,660 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) [2021-07-09 18:34:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-09 18:34:07,661 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-09 18:34:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:07,661 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-09 18:34:07,661 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) [2021-07-09 18:34:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-09 18:34:07,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:07,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:07,663 INFO L508 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] [2021-07-09 18:34:07,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:07,868 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:07,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:07,868 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-07-09 18:34:07,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:07,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435772217] [2021-07-09 18:34:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:07,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:07,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435772217] [2021-07-09 18:34:07,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435772217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:07,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785674946] [2021-07-09 18:34:07,897 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 [2021-07-09 18:34:07,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:07,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:07,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:07,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:07,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785674946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:07,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:07,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:34:07,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968812188] [2021-07-09 18:34:07,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:34:07,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:07,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:34:07,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:34:07,969 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) [2021-07-09 18:34:08,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:08,237 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-09 18:34:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:34:08,238 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 [2021-07-09 18:34:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:08,241 INFO L225 Difference]: With dead ends: 1555 [2021-07-09 18:34:08,241 INFO L226 Difference]: Without dead ends: 1555 [2021-07-09 18:34:08,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-09 18:34:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-09 18:34:08,254 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) [2021-07-09 18:34:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-09 18:34:08,256 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-09 18:34:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:08,256 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-09 18:34:08,256 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) [2021-07-09 18:34:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-09 18:34:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:08,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:08,258 INFO L508 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] [2021-07-09 18:34:08,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:08,465 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-07-09 18:34:08,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:08,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194931989] [2021-07-09 18:34:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:08,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:08,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194931989] [2021-07-09 18:34:08,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194931989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:08,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024757294] [2021-07-09 18:34:08,493 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 [2021-07-09 18:34:08,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:08,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:08,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:08,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:08,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024757294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:08,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:08,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:34:08,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90842001] [2021-07-09 18:34:08,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:34:08,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:08,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:34:08,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:34:08,564 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) [2021-07-09 18:34:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:08,789 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-09 18:34:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:34:08,789 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 [2021-07-09 18:34:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:08,792 INFO L225 Difference]: With dead ends: 1605 [2021-07-09 18:34:08,792 INFO L226 Difference]: Without dead ends: 1605 [2021-07-09 18:34:08,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:34:08,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-09 18:34:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-09 18:34:08,821 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) [2021-07-09 18:34:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-09 18:34:08,823 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-09 18:34:08,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:08,824 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-09 18:34:08,824 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) [2021-07-09 18:34:08,824 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-09 18:34:08,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:08,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:08,826 INFO L508 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] [2021-07-09 18:34:09,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:09,041 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:09,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-07-09 18:34:09,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:09,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017037324] [2021-07-09 18:34:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:09,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:09,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017037324] [2021-07-09 18:34:09,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017037324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931703492] [2021-07-09 18:34:09,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:09,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:09,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:09,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:09,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:34:09,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931703492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:09,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:34:09,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628517318] [2021-07-09 18:34:09,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:34:09,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:09,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:34:09,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:34:09,139 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) [2021-07-09 18:34:09,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:09,305 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-09 18:34:09,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:34:09,305 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 [2021-07-09 18:34:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:09,308 INFO L225 Difference]: With dead ends: 1524 [2021-07-09 18:34:09,309 INFO L226 Difference]: Without dead ends: 1520 [2021-07-09 18:34:09,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:34:09,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-09 18:34:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-09 18:34:09,322 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) [2021-07-09 18:34:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-09 18:34:09,324 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-09 18:34:09,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:09,324 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-09 18:34:09,324 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) [2021-07-09 18:34:09,324 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-09 18:34:09,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:09,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:09,327 INFO L508 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] [2021-07-09 18:34:09,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-09 18:34:09,541 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:09,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:09,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-07-09 18:34:09,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:09,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176744533] [2021-07-09 18:34:09,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:09,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:09,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176744533] [2021-07-09 18:34:09,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176744533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940123464] [2021-07-09 18:34:09,574 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) [2021-07-09 18:34:09,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:09,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:09,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:09,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940123464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:09,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:34:09,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413347976] [2021-07-09 18:34:09,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:34:09,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:09,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:34:09,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:34:09,648 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) [2021-07-09 18:34:09,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:09,863 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-09 18:34:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:34:09,863 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 [2021-07-09 18:34:09,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:09,866 INFO L225 Difference]: With dead ends: 1508 [2021-07-09 18:34:09,866 INFO L226 Difference]: Without dead ends: 1496 [2021-07-09 18:34:09,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:34:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-09 18:34:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-09 18:34:09,879 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) [2021-07-09 18:34:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-09 18:34:09,881 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-09 18:34:09,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:09,881 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-09 18:34:09,881 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) [2021-07-09 18:34:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-09 18:34:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:09,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:09,883 INFO L508 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] [2021-07-09 18:34:10,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:10,097 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:10,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-07-09 18:34:10,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:10,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502317581] [2021-07-09 18:34:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:10,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:10,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502317581] [2021-07-09 18:34:10,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502317581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:10,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315757931] [2021-07-09 18:34:10,136 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 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 [2021-07-09 18:34:10,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:10,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:10,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:10,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:10,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315757931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:10,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:10,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:10,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850231278] [2021-07-09 18:34:10,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:10,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:10,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:10,242 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) [2021-07-09 18:34:10,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:10,724 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-09 18:34:10,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:34:10,724 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 [2021-07-09 18:34:10,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:10,729 INFO L225 Difference]: With dead ends: 2412 [2021-07-09 18:34:10,729 INFO L226 Difference]: Without dead ends: 2412 [2021-07-09 18:34:10,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:34:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-09 18:34:10,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-09 18:34:10,748 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) [2021-07-09 18:34:10,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-09 18:34:10,750 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-09 18:34:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:10,750 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-09 18:34:10,750 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) [2021-07-09 18:34:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-09 18:34:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:10,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:10,752 INFO L508 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] [2021-07-09 18:34:10,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 18:34:10,968 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:10,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:10,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-07-09 18:34:10,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:10,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825629559] [2021-07-09 18:34:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:11,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:11,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825629559] [2021-07-09 18:34:11,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825629559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:11,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866054763] [2021-07-09 18:34:11,008 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 [2021-07-09 18:34:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:11,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:11,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:11,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866054763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:11,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:11,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:11,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148156946] [2021-07-09 18:34:11,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:11,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:11,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:11,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:11,104 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) [2021-07-09 18:34:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:11,524 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-09 18:34:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:34:11,524 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 [2021-07-09 18:34:11,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:11,528 INFO L225 Difference]: With dead ends: 2335 [2021-07-09 18:34:11,528 INFO L226 Difference]: Without dead ends: 2335 [2021-07-09 18:34:11,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:34:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-09 18:34:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-09 18:34:11,545 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) [2021-07-09 18:34:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:34:11,548 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:34:11,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:11,548 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:34:11,548 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) [2021-07-09 18:34:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:34:11,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:11,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:11,550 INFO L508 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] [2021-07-09 18:34:11,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:11,766 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:11,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:11,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-07-09 18:34:11,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:11,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957230256] [2021-07-09 18:34:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:11,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:11,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957230256] [2021-07-09 18:34:11,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957230256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:11,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147262512] [2021-07-09 18:34:11,795 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 [2021-07-09 18:34:11,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:11,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:11,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:11,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147262512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:11,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:11,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:34:11,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29496196] [2021-07-09 18:34:11,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:11,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:11,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:11,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:11,881 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) [2021-07-09 18:34:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:12,285 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-09 18:34:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:34:12,286 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 [2021-07-09 18:34:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:12,290 INFO L225 Difference]: With dead ends: 2285 [2021-07-09 18:34:12,290 INFO L226 Difference]: Without dead ends: 2285 [2021-07-09 18:34:12,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:34:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-09 18:34:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-09 18:34:12,307 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) [2021-07-09 18:34:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-09 18:34:12,309 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-09 18:34:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:12,309 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-09 18:34:12,309 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) [2021-07-09 18:34:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-09 18:34:12,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:12,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:12,311 INFO L508 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] [2021-07-09 18:34:12,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 18:34:12,525 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:12,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:12,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-07-09 18:34:12,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:12,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812105484] [2021-07-09 18:34:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:12,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:12,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812105484] [2021-07-09 18:34:12,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812105484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:12,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866208531] [2021-07-09 18:34:12,554 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 [2021-07-09 18:34:12,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:12,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:12,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:12,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:12,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866208531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:12,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:12,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:34:12,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50612952] [2021-07-09 18:34:12,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:12,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:12,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:12,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:12,651 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) [2021-07-09 18:34:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:12,991 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-09 18:34:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:34:12,991 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 [2021-07-09 18:34:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:12,995 INFO L225 Difference]: With dead ends: 2176 [2021-07-09 18:34:12,995 INFO L226 Difference]: Without dead ends: 2172 [2021-07-09 18:34:12,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:34:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-09 18:34:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-09 18:34:13,014 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) [2021-07-09 18:34:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:34:13,016 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:34:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:13,016 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:34:13,016 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) [2021-07-09 18:34:13,016 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:34:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:13,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:13,018 INFO L508 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] [2021-07-09 18:34:13,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:13,226 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-07-09 18:34:13,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:13,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876894034] [2021-07-09 18:34:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:13,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:13,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876894034] [2021-07-09 18:34:13,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876894034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:13,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54518582] [2021-07-09 18:34:13,262 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 [2021-07-09 18:34:13,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:13,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:13,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:13,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:13,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54518582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:13,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:13,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:13,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691998925] [2021-07-09 18:34:13,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:13,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:13,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:13,357 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) [2021-07-09 18:34:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:13,690 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-09 18:34:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:34:13,690 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 [2021-07-09 18:34:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:13,694 INFO L225 Difference]: With dead ends: 2199 [2021-07-09 18:34:13,694 INFO L226 Difference]: Without dead ends: 2199 [2021-07-09 18:34:13,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:34:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-09 18:34:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-09 18:34:13,712 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) [2021-07-09 18:34:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-09 18:34:13,714 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-09 18:34:13,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:13,714 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-09 18:34:13,714 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) [2021-07-09 18:34:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-09 18:34:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:13,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:13,716 INFO L508 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] [2021-07-09 18:34:13,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-09 18:34:13,916 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:13,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:13,916 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-07-09 18:34:13,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:13,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456563249] [2021-07-09 18:34:13,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:13,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:13,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456563249] [2021-07-09 18:34:13,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456563249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:13,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740649839] [2021-07-09 18:34:13,945 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 [2021-07-09 18:34:13,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:13,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:13,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:13,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:14,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740649839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:14,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:14,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:14,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505392009] [2021-07-09 18:34:14,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:14,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:14,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:14,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:14,037 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) [2021-07-09 18:34:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:14,404 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-09 18:34:14,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:34:14,404 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 [2021-07-09 18:34:14,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:14,407 INFO L225 Difference]: With dead ends: 2156 [2021-07-09 18:34:14,407 INFO L226 Difference]: Without dead ends: 2152 [2021-07-09 18:34:14,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:34:14,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-09 18:34:14,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-09 18:34:14,425 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) [2021-07-09 18:34:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-09 18:34:14,427 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-09 18:34:14,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:14,427 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-09 18:34:14,428 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) [2021-07-09 18:34:14,428 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-09 18:34:14,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:14,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:14,429 INFO L508 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] [2021-07-09 18:34:14,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 18:34:14,646 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:14,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:14,646 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-07-09 18:34:14,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:14,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897122567] [2021-07-09 18:34:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:14,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:14,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897122567] [2021-07-09 18:34:14,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897122567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:14,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445918839] [2021-07-09 18:34:14,678 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 [2021-07-09 18:34:14,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:14,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:14,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:14,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:14,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445918839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:14,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:14,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:14,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531127260] [2021-07-09 18:34:14,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:34:14,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:14,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:34:14,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:14,784 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) [2021-07-09 18:34:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:15,092 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-09 18:34:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:34:15,092 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 [2021-07-09 18:34:15,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:15,095 INFO L225 Difference]: With dead ends: 2097 [2021-07-09 18:34:15,095 INFO L226 Difference]: Without dead ends: 2097 [2021-07-09 18:34:15,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:34:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-09 18:34:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-09 18:34:15,112 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) [2021-07-09 18:34:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-09 18:34:15,114 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-09 18:34:15,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:15,114 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-09 18:34:15,114 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) [2021-07-09 18:34:15,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-09 18:34:15,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:15,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:15,116 INFO L508 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] [2021-07-09 18:34:15,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:15,318 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-07-09 18:34:15,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:15,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218195654] [2021-07-09 18:34:15,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:15,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:15,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218195654] [2021-07-09 18:34:15,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218195654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:15,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244618401] [2021-07-09 18:34:15,356 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 [2021-07-09 18:34:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:15,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:15,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:15,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244618401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:15,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:15,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:15,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348925786] [2021-07-09 18:34:15,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:34:15,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:15,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:34:15,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:15,424 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) [2021-07-09 18:34:15,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:15,666 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-09 18:34:15,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:34:15,667 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 [2021-07-09 18:34:15,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:15,670 INFO L225 Difference]: With dead ends: 1963 [2021-07-09 18:34:15,670 INFO L226 Difference]: Without dead ends: 1959 [2021-07-09 18:34:15,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:34:15,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-09 18:34:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-09 18:34:15,687 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) [2021-07-09 18:34:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-09 18:34:15,689 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-09 18:34:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:15,689 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-09 18:34:15,689 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) [2021-07-09 18:34:15,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-09 18:34:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:15,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:15,691 INFO L508 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] [2021-07-09 18:34:15,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:15,905 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:15,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:15,905 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-07-09 18:34:15,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:15,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916335414] [2021-07-09 18:34:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:15,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:15,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916335414] [2021-07-09 18:34:15,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916335414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:15,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896605703] [2021-07-09 18:34:15,933 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 [2021-07-09 18:34:15,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:15,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:15,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:15,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:16,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896605703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:16,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:16,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:34:16,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421886089] [2021-07-09 18:34:16,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:34:16,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:16,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:34:16,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:34:16,000 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) [2021-07-09 18:34:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:16,203 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-09 18:34:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:34:16,203 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 [2021-07-09 18:34:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:16,206 INFO L225 Difference]: With dead ends: 1728 [2021-07-09 18:34:16,206 INFO L226 Difference]: Without dead ends: 1716 [2021-07-09 18:34:16,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:34:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-09 18:34:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-09 18:34:16,229 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) [2021-07-09 18:34:16,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-09 18:34:16,231 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-09 18:34:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:16,231 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-09 18:34:16,231 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) [2021-07-09 18:34:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-09 18:34:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:16,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:16,234 INFO L508 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] [2021-07-09 18:34:16,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:16,445 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-07-09 18:34:16,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:16,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121886279] [2021-07-09 18:34:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:16,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:16,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121886279] [2021-07-09 18:34:16,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121886279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:16,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257788889] [2021-07-09 18:34:16,475 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 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 [2021-07-09 18:34:16,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:16,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:16,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:16,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:16,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257788889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:16,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:16,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:16,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235969871] [2021-07-09 18:34:16,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:16,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:16,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:16,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:16,567 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) [2021-07-09 18:34:16,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:16,885 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-09 18:34:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:34:16,886 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 [2021-07-09 18:34:16,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:16,888 INFO L225 Difference]: With dead ends: 1821 [2021-07-09 18:34:16,888 INFO L226 Difference]: Without dead ends: 1821 [2021-07-09 18:34:16,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:34:16,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-09 18:34:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-09 18:34:16,904 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) [2021-07-09 18:34:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-09 18:34:16,906 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-09 18:34:16,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:16,906 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-09 18:34:16,906 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) [2021-07-09 18:34:16,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-09 18:34:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:16,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:16,908 INFO L508 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] [2021-07-09 18:34:17,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:17,112 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:17,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:17,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-07-09 18:34:17,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:17,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850689428] [2021-07-09 18:34:17,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:17,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:17,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850689428] [2021-07-09 18:34:17,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850689428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:17,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35454035] [2021-07-09 18:34:17,159 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 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 [2021-07-09 18:34:17,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:17,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:17,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:17,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:17,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35454035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:17,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:17,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:34:17,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293960815] [2021-07-09 18:34:17,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:34:17,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:17,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:34:17,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:34:17,249 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) [2021-07-09 18:34:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:17,525 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-09 18:34:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:34:17,525 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 [2021-07-09 18:34:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:17,528 INFO L225 Difference]: With dead ends: 1790 [2021-07-09 18:34:17,528 INFO L226 Difference]: Without dead ends: 1786 [2021-07-09 18:34:17,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:34:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-09 18:34:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-09 18:34:17,543 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) [2021-07-09 18:34:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-09 18:34:17,545 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-09 18:34:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:17,545 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-09 18:34:17,545 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) [2021-07-09 18:34:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-09 18:34:17,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:34:17,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:17,547 INFO L508 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] [2021-07-09 18:34:17,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-09 18:34:17,747 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-07-09 18:34:17,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:17,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618047224] [2021-07-09 18:34:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:17,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:17,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618047224] [2021-07-09 18:34:17,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618047224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:17,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215806646] [2021-07-09 18:34:17,780 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 [2021-07-09 18:34:17,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:17,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:17,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:34:17,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:17,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215806646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:17,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:17,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:34:17,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077965676] [2021-07-09 18:34:17,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:34:17,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:17,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:34:17,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:34:17,858 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) [2021-07-09 18:34:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:18,002 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-09 18:34:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:34:18,002 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 [2021-07-09 18:34:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:18,005 INFO L225 Difference]: With dead ends: 1649 [2021-07-09 18:34:18,005 INFO L226 Difference]: Without dead ends: 1637 [2021-07-09 18:34:18,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:34:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-09 18:34:18,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-09 18:34:18,018 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) [2021-07-09 18:34:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-09 18:34:18,020 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-09 18:34:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:18,020 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-09 18:34:18,020 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) [2021-07-09 18:34:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-09 18:34:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:18,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:18,022 INFO L508 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] [2021-07-09 18:34:18,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:18,237 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:18,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-07-09 18:34:18,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:18,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584090226] [2021-07-09 18:34:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:18,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:18,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584090226] [2021-07-09 18:34:18,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584090226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:18,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727037080] [2021-07-09 18:34:18,692 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 [2021-07-09 18:34:18,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:18,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:18,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:34:18,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:19,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:34:19,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:19,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:19,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:19,161 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:34:19,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-07-09 18:34:19,174 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:19,180 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:34:19,187 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-07-09 18:34:19,193 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:19,198 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:34:19,204 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:34:19,210 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:19,216 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:19,222 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:19,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:19,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:19,225 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:19,245 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 18:34:19,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:34:19,246 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-09 18:34:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:19,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727037080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:19,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:19,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:34:19,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958569838] [2021-07-09 18:34:19,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:19,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:19,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:19,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:19,271 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:19,939 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-07-09 18:34:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:34:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:19,942 INFO L225 Difference]: With dead ends: 1517 [2021-07-09 18:34:19,942 INFO L226 Difference]: Without dead ends: 1502 [2021-07-09 18:34:19,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 986.7ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:19,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-07-09 18:34:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-07-09 18:34:19,955 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) [2021-07-09 18:34:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-09 18:34:19,958 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-09 18:34:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:19,958 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-09 18:34:19,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-09 18:34:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:19,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:19,959 INFO L508 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] [2021-07-09 18:34:20,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 18:34:20,160 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:20,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:20,160 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-07-09 18:34:20,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:20,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562237224] [2021-07-09 18:34:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:20,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:20,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562237224] [2021-07-09 18:34:20,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562237224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:20,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959901854] [2021-07-09 18:34:20,561 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 [2021-07-09 18:34:20,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:20,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:34:20,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:21,005 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-07-09 18:34:21,062 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-07-09 18:34:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:21,066 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 21 treesize of output 13 [2021-07-09 18:34:21,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:21,160 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-07-09 18:34:21,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:21,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:21,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:34:21,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:21,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:21,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:21,225 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 23 treesize of output 13 [2021-07-09 18:34:21,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:21,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:21,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:21,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:21,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:21,273 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-07-09 18:34:21,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:34:21,278 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-07-09 18:34:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:21,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959901854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:21,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:21,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:34:21,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545314625] [2021-07-09 18:34:21,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:34:21,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:21,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:34:21,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:34:21,325 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:22,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:22,677 INFO L93 Difference]: Finished difference Result 1616 states and 5213 transitions. [2021-07-09 18:34:22,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:34:22,678 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:22,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:22,680 INFO L225 Difference]: With dead ends: 1616 [2021-07-09 18:34:22,680 INFO L226 Difference]: Without dead ends: 1571 [2021-07-09 18:34:22,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1639.9ms TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:34:22,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-07-09 18:34:22,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1171. [2021-07-09 18:34:22,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.347008547008547) internal successors, (3916), 1170 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3916 transitions. [2021-07-09 18:34:22,697 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3916 transitions. Word has length 26 [2021-07-09 18:34:22,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:22,697 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3916 transitions. [2021-07-09 18:34:22,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:22,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3916 transitions. [2021-07-09 18:34:22,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:22,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:22,699 INFO L508 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] [2021-07-09 18:34:22,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:22,915 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:22,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-07-09 18:34:22,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:22,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050921802] [2021-07-09 18:34:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:23,287 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-07-09 18:34:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:23,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:23,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050921802] [2021-07-09 18:34:23,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050921802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:23,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487294754] [2021-07-09 18:34:23,461 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 [2021-07-09 18:34:23,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:23,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:23,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:34:23,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:24,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,080 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 30 treesize of output 16 [2021-07-09 18:34:24,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:34:24,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:34:24,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:34:24,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:34:24,124 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:34:24,132 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:34:24,141 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:34:24,150 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:34:24,158 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:34:24,166 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:34:24,174 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,183 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 37 treesize of output 19 [2021-07-09 18:34:24,184 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:24,193 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:34:24,202 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:24,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:24,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:34:24,208 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:24,230 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-07-09 18:34:24,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:34:24,231 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-09 18:34:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:24,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487294754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:24,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:24,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:34:24,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857570625] [2021-07-09 18:34:24,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:34:24,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:24,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:34:24,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:34:24,261 INFO L87 Difference]: Start difference. First operand 1171 states and 3916 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:24,667 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2021-07-09 18:34:25,034 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2021-07-09 18:34:25,808 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2021-07-09 18:34:25,926 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 39 [2021-07-09 18:34:26,421 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-07-09 18:34:26,617 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-09 18:34:26,752 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2021-07-09 18:34:26,992 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-09 18:34:27,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:27,068 INFO L93 Difference]: Finished difference Result 1671 states and 5380 transitions. [2021-07-09 18:34:27,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:34:27,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:27,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:27,071 INFO L225 Difference]: With dead ends: 1671 [2021-07-09 18:34:27,071 INFO L226 Difference]: Without dead ends: 1656 [2021-07-09 18:34:27,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 2859.7ms TimeCoverageRelationStatistics Valid=361, Invalid=1801, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:34:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-07-09 18:34:27,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1201. [2021-07-09 18:34:27,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3316666666666666) internal successors, (3998), 1200 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3998 transitions. [2021-07-09 18:34:27,086 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3998 transitions. Word has length 26 [2021-07-09 18:34:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:27,086 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 3998 transitions. [2021-07-09 18:34:27,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3998 transitions. [2021-07-09 18:34:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:27,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:27,088 INFO L508 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] [2021-07-09 18:34:27,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:27,289 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:27,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:27,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-07-09 18:34:27,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:27,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722826648] [2021-07-09 18:34:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:27,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:27,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722826648] [2021-07-09 18:34:27,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722826648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:27,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658794400] [2021-07-09 18:34:27,654 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 [2021-07-09 18:34:27,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:27,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:27,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:34:27,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:28,052 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_9], 2=[A, v_prenex_7]} [2021-07-09 18:34:28,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:28,056 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 21 treesize of output 13 [2021-07-09 18:34:28,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:28,172 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-07-09 18:34:28,172 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-07-09 18:34:28,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:28,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:28,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:34:28,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:28,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:28,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:28,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:28,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:34:28,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:28,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:28,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:34:28,227 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-07-09 18:34:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:28,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658794400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:28,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:28,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:34:28,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406344340] [2021-07-09 18:34:28,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:28,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:28,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:28,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:28,256 INFO L87 Difference]: Start difference. First operand 1201 states and 3998 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:29,195 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-07-09 18:34:29,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:29,483 INFO L93 Difference]: Finished difference Result 1703 states and 5445 transitions. [2021-07-09 18:34:29,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:34:29,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:29,486 INFO L225 Difference]: With dead ends: 1703 [2021-07-09 18:34:29,486 INFO L226 Difference]: Without dead ends: 1673 [2021-07-09 18:34:29,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1362.7ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:34:29,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2021-07-09 18:34:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1210. [2021-07-09 18:34:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.329197684036394) internal successors, (4025), 1209 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4025 transitions. [2021-07-09 18:34:29,502 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4025 transitions. Word has length 26 [2021-07-09 18:34:29,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:29,502 INFO L482 AbstractCegarLoop]: Abstraction has 1210 states and 4025 transitions. [2021-07-09 18:34:29,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:29,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4025 transitions. [2021-07-09 18:34:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:29,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:29,504 INFO L508 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] [2021-07-09 18:34:29,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-09 18:34:29,705 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:29,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:29,705 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-07-09 18:34:29,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:29,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593853681] [2021-07-09 18:34:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:30,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:30,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593853681] [2021-07-09 18:34:30,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593853681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:30,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331652667] [2021-07-09 18:34:30,099 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 [2021-07-09 18:34:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:30,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:34:30,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,704 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 30 treesize of output 16 [2021-07-09 18:34:30,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:34:30,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:34:30,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:34:30,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,738 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 35 treesize of output 19 [2021-07-09 18:34:30,738 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,746 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 37 treesize of output 19 [2021-07-09 18:34:30,746 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:34:30,755 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:34:30,763 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:34:30,771 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:34:30,786 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:34:30,794 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:34:30,802 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,809 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 35 treesize of output 19 [2021-07-09 18:34:30,810 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:30,817 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:30,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:30,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:34:30,821 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:30,841 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 18:34:30,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:34:30,842 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-09 18:34:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:30,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331652667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:30,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:30,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:34:30,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378117534] [2021-07-09 18:34:30,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:34:30,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:30,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:34:30,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:34:30,867 INFO L87 Difference]: Start difference. First operand 1210 states and 4025 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:32,762 INFO L93 Difference]: Finished difference Result 1830 states and 5830 transitions. [2021-07-09 18:34:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:34:32,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:32,765 INFO L225 Difference]: With dead ends: 1830 [2021-07-09 18:34:32,765 INFO L226 Difference]: Without dead ends: 1815 [2021-07-09 18:34:32,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1979.7ms TimeCoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:34:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-07-09 18:34:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1222. [2021-07-09 18:34:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.3374283374283373) internal successors, (4075), 1221 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4075 transitions. [2021-07-09 18:34:32,781 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4075 transitions. Word has length 26 [2021-07-09 18:34:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:32,782 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4075 transitions. [2021-07-09 18:34:32,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4075 transitions. [2021-07-09 18:34:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:32,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:32,784 INFO L508 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] [2021-07-09 18:34:32,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-09 18:34:32,987 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:32,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-07-09 18:34:32,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:32,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093509486] [2021-07-09 18:34:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:33,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:33,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093509486] [2021-07-09 18:34:33,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093509486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:33,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564362691] [2021-07-09 18:34:33,474 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 [2021-07-09 18:34:33,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:33,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:33,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:34:33,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:34,123 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:34:34,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-07-09 18:34:34,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,167 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-07-09 18:34:34,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:34:34,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,201 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-07-09 18:34:34,202 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 33 treesize of output 30 [2021-07-09 18:34:34,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,240 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-09 18:34:34,240 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 26 treesize of output 40 [2021-07-09 18:34:34,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,285 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-09 18:34:34,285 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 28 treesize of output 40 [2021-07-09 18:34:34,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,311 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:34:34,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-07-09 18:34:34,312 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,349 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-09 18:34:34,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-07-09 18:34:34,356 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,400 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:34:34,400 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 35 treesize of output 51 [2021-07-09 18:34:34,408 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,449 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:34:34,449 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 33 treesize of output 47 [2021-07-09 18:34:34,458 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,497 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-07-09 18:34:34,497 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 38 [2021-07-09 18:34:34,498 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,518 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:34:34,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:34:34,518 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,563 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:34:34,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-07-09 18:34:34,587 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,606 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:34:34,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 1 [2021-07-09 18:34:34,607 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,646 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-09 18:34:34,646 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 26 treesize of output 40 [2021-07-09 18:34:34,653 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,701 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:34:34,702 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 21 treesize of output 45 [2021-07-09 18:34:34,710 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:34,723 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-07-09 18:34:34,723 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 35 treesize of output 1 [2021-07-09 18:34:34,724 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:35,156 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-07-09 18:34:35,157 INFO L628 ElimStorePlain]: treesize reduction 236, result has 55.1 percent of original size [2021-07-09 18:34:35,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:35,166 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:833, output treesize:341 [2021-07-09 18:34:35,400 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-09 18:34:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:35,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564362691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:35,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:35,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:34:35,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113686589] [2021-07-09 18:34:35,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:34:35,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:35,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:34:35,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:34:35,567 INFO L87 Difference]: Start difference. First operand 1222 states and 4075 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:37,000 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-07-09 18:34:37,233 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-07-09 18:34:37,634 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-07-09 18:34:37,988 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-07-09 18:34:38,330 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-07-09 18:34:38,608 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 66 [2021-07-09 18:34:39,038 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2021-07-09 18:34:39,256 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2021-07-09 18:34:39,425 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 41 [2021-07-09 18:34:39,856 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-07-09 18:34:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:39,950 INFO L93 Difference]: Finished difference Result 2502 states and 7680 transitions. [2021-07-09 18:34:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:34:39,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:39,954 INFO L225 Difference]: With dead ends: 2502 [2021-07-09 18:34:39,954 INFO L226 Difference]: Without dead ends: 2457 [2021-07-09 18:34:39,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 4710.2ms TimeCoverageRelationStatistics Valid=695, Invalid=3727, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:34:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-07-09 18:34:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 1394. [2021-07-09 18:34:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.3058147882268485) internal successors, (4605), 1393 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:39,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 4605 transitions. [2021-07-09 18:34:39,976 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 4605 transitions. Word has length 26 [2021-07-09 18:34:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:39,976 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 4605 transitions. [2021-07-09 18:34:39,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 4605 transitions. [2021-07-09 18:34:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:39,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:39,978 INFO L508 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] [2021-07-09 18:34:40,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-07-09 18:34:40,179 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:40,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:40,179 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-07-09 18:34:40,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:40,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318879897] [2021-07-09 18:34:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:40,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:40,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318879897] [2021-07-09 18:34:40,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318879897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:40,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315335795] [2021-07-09 18:34:40,532 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 [2021-07-09 18:34:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:40,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:34:40,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:40,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-07-09 18:34:40,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:34:40,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:34:40,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:34:40,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:40,965 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:40,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:40,975 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:40,980 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-07-09 18:34:40,985 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:34:40,991 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:40,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:40,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:40,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:40,997 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:41,002 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-07-09 18:34:41,008 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:34:41,013 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:41,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:41,019 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 30 treesize of output 16 [2021-07-09 18:34:41,020 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:41,038 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-07-09 18:34:41,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:34:41,039 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-09 18:34:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:41,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315335795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:41,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:41,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:34:41,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052014728] [2021-07-09 18:34:41,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:41,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:41,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:41,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:41,062 INFO L87 Difference]: Start difference. First operand 1394 states and 4605 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:42,010 INFO L93 Difference]: Finished difference Result 1799 states and 5825 transitions. [2021-07-09 18:34:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:34:42,010 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:42,013 INFO L225 Difference]: With dead ends: 1799 [2021-07-09 18:34:42,013 INFO L226 Difference]: Without dead ends: 1784 [2021-07-09 18:34:42,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1098.3ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:34:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-07-09 18:34:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1405. [2021-07-09 18:34:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 3.3034188034188032) internal successors, (4638), 1404 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 4638 transitions. [2021-07-09 18:34:42,032 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 4638 transitions. Word has length 26 [2021-07-09 18:34:42,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:42,032 INFO L482 AbstractCegarLoop]: Abstraction has 1405 states and 4638 transitions. [2021-07-09 18:34:42,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:42,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 4638 transitions. [2021-07-09 18:34:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:42,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:42,034 INFO L508 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] [2021-07-09 18:34:42,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-09 18:34:42,235 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:42,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:42,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-07-09 18:34:42,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:42,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969905225] [2021-07-09 18:34:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:42,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:42,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969905225] [2021-07-09 18:34:42,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969905225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:42,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454786233] [2021-07-09 18:34:42,599 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 [2021-07-09 18:34:42,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:42,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:42,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:34:42,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:42,951 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-09 18:34:43,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:43,134 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:34:43,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 39 [2021-07-09 18:34:43,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:43,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:43,151 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-07-09 18:34:43,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 25 [2021-07-09 18:34:43,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:43,544 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 148 [2021-07-09 18:34:43,545 INFO L628 ElimStorePlain]: treesize reduction 100, result has 83.4 percent of original size [2021-07-09 18:34:43,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:43,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:43,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 36 [2021-07-09 18:34:43,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:43,587 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-07-09 18:34:43,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 38 treesize of output 1 [2021-07-09 18:34:43,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:43,737 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-07-09 18:34:43,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:43,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:43,766 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:34:43,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-07-09 18:34:43,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:43,918 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-09 18:34:43,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:43,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:43,939 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:34:43,939 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 38 treesize of output 30 [2021-07-09 18:34:43,940 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,087 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 18:34:44,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,107 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-07-09 18:34:44,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 [2021-07-09 18:34:44,109 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,248 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-07-09 18:34:44,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-07-09 18:34:44,272 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,412 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-09 18:34:44,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,433 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:34:44,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 34 [2021-07-09 18:34:44,437 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,567 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-09 18:34:44,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 36 [2021-07-09 18:34:44,594 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:44,605 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-07-09 18:34:44,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 18 [2021-07-09 18:34:44,607 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,824 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-07-09 18:34:44,824 INFO L628 ElimStorePlain]: treesize reduction 23, result has 92.5 percent of original size [2021-07-09 18:34:44,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:34:44,838 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:679, output treesize:449 [2021-07-09 18:34:45,088 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-07-09 18:34:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:45,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454786233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:45,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:45,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:34:45,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312626817] [2021-07-09 18:34:45,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:34:45,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:45,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:34:45,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:34:45,210 INFO L87 Difference]: Start difference. First operand 1405 states and 4638 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:45,832 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 18:34:46,247 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-07-09 18:34:46,440 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-07-09 18:34:46,618 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 33 [2021-07-09 18:34:46,899 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2021-07-09 18:34:47,361 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-09 18:34:47,597 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-07-09 18:34:47,884 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-07-09 18:34:48,347 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-09 18:34:48,951 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2021-07-09 18:34:49,278 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2021-07-09 18:34:49,475 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-07-09 18:34:50,093 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-07-09 18:34:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:50,633 INFO L93 Difference]: Finished difference Result 2194 states and 6873 transitions. [2021-07-09 18:34:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:34:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:50,637 INFO L225 Difference]: With dead ends: 2194 [2021-07-09 18:34:50,637 INFO L226 Difference]: Without dead ends: 2149 [2021-07-09 18:34:50,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 5378.7ms TimeCoverageRelationStatistics Valid=352, Invalid=2000, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:34:50,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-07-09 18:34:50,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1416. [2021-07-09 18:34:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.311660777385159) internal successors, (4686), 1415 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4686 transitions. [2021-07-09 18:34:50,660 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4686 transitions. Word has length 26 [2021-07-09 18:34:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:50,660 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4686 transitions. [2021-07-09 18:34:50,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4686 transitions. [2021-07-09 18:34:50,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:50,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:50,662 INFO L508 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] [2021-07-09 18:34:50,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-07-09 18:34:50,862 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:50,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-07-09 18:34:50,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:50,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493162477] [2021-07-09 18:34:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:51,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493162477] [2021-07-09 18:34:51,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493162477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239225238] [2021-07-09 18:34:51,061 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 [2021-07-09 18:34:51,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:51,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:51,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:34:51,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:51,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:51,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:51,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:51,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:51,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:51,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:51,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:51,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:34:51,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:51,733 INFO L628 ElimStorePlain]: treesize reduction 117, result has 42.4 percent of original size [2021-07-09 18:34:51,733 INFO L518 ElimStorePlain]: Eliminatee v_prenex_32 vanished before elimination [2021-07-09 18:34:51,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:51,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:51,737 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:51,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:51,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:51,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:51,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:51,768 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 23 treesize of output 13 [2021-07-09 18:34:51,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:51,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:51,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:34:51,793 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:24 [2021-07-09 18:34:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:51,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239225238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:51,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:51,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:34:51,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879631111] [2021-07-09 18:34:51,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:34:51,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:51,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:34:51,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:34:51,824 INFO L87 Difference]: Start difference. First operand 1416 states and 4686 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:52,657 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-09 18:34:52,827 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-07-09 18:34:53,132 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2021-07-09 18:34:53,298 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-09 18:34:53,559 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-07-09 18:34:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:53,660 INFO L93 Difference]: Finished difference Result 2242 states and 7148 transitions. [2021-07-09 18:34:53,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:34:53,660 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:53,664 INFO L225 Difference]: With dead ends: 2242 [2021-07-09 18:34:53,664 INFO L226 Difference]: Without dead ends: 2212 [2021-07-09 18:34:53,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1965.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:34:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-07-09 18:34:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1446. [2021-07-09 18:34:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.3217993079584773) internal successors, (4800), 1445 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4800 transitions. [2021-07-09 18:34:53,685 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4800 transitions. Word has length 26 [2021-07-09 18:34:53,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:53,685 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4800 transitions. [2021-07-09 18:34:53,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4800 transitions. [2021-07-09 18:34:53,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:53,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:53,687 INFO L508 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] [2021-07-09 18:34:53,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:53,888 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:53,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:53,888 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-07-09 18:34:53,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:53,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373903917] [2021-07-09 18:34:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:54,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:54,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373903917] [2021-07-09 18:34:54,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373903917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:54,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789355509] [2021-07-09 18:34:54,192 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 [2021-07-09 18:34:54,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:54,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:54,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:34:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:54,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,560 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 30 treesize of output 13 [2021-07-09 18:34:54,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:34:54,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:34:54,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:54,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-07-09 18:34:54,586 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:54,591 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-07-09 18:34:54,597 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:34:54,603 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:54,609 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:54,615 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:54,621 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:54,626 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:54,631 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:34:54,635 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:54,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:54,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-07-09 18:34:54,638 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:54,657 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 18:34:54,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:34:54,658 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-09 18:34:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:54,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789355509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:54,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:54,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:34:54,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489528756] [2021-07-09 18:34:54,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:34:54,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:34:54,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:34:54,686 INFO L87 Difference]: Start difference. First operand 1446 states and 4800 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) [2021-07-09 18:34:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:55,248 INFO L93 Difference]: Finished difference Result 1751 states and 5745 transitions. [2021-07-09 18:34:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:34:55,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:55,251 INFO L225 Difference]: With dead ends: 1751 [2021-07-09 18:34:55,251 INFO L226 Difference]: Without dead ends: 1736 [2021-07-09 18:34:55,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 729.9ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:34:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-07-09 18:34:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1455. [2021-07-09 18:34:55,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.3259972489683634) internal successors, (4836), 1454 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4836 transitions. [2021-07-09 18:34:55,269 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4836 transitions. Word has length 26 [2021-07-09 18:34:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:55,269 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4836 transitions. [2021-07-09 18:34:55,269 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) [2021-07-09 18:34:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4836 transitions. [2021-07-09 18:34:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:55,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:55,271 INFO L508 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] [2021-07-09 18:34:55,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:55,472 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:55,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 11 times [2021-07-09 18:34:55,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:55,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810769684] [2021-07-09 18:34:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:55,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:55,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810769684] [2021-07-09 18:34:55,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810769684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:55,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038002592] [2021-07-09 18:34:55,745 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 [2021-07-09 18:34:55,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:34:55,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:55,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:34:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:55,999 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:55,999 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 28 treesize of output 16 [2021-07-09 18:34:56,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,007 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:56,007 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 28 treesize of output 16 [2021-07-09 18:34:56,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,018 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:56,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:34:56,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,027 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:56,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:56,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:56,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:34:56,039 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,049 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:56,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:34:56,051 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,059 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:56,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:56,059 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,070 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:56,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:34:56,071 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:56,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:34:56,083 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,091 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:56,091 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 28 treesize of output 16 [2021-07-09 18:34:56,091 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,100 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:56,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:34:56,101 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,109 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:56,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:34:56,109 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,117 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:56,117 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 33 treesize of output 19 [2021-07-09 18:34:56,118 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,125 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:56,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:56,126 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,133 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:56,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:56,134 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:56,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:56,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:34:56,144 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,207 INFO L628 ElimStorePlain]: treesize reduction 55, result has 55.6 percent of original size [2021-07-09 18:34:56,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:34:56,208 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:569, output treesize:69 [2021-07-09 18:34:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:56,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038002592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:56,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:56,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:34:56,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121067153] [2021-07-09 18:34:56,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:34:56,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:56,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:34:56,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:34:56,303 INFO L87 Difference]: Start difference. First operand 1455 states and 4836 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:56,894 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-09 18:34:57,704 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-07-09 18:34:58,153 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-07-09 18:34:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:58,435 INFO L93 Difference]: Finished difference Result 2518 states and 8034 transitions. [2021-07-09 18:34:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:34:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:34:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:58,439 INFO L225 Difference]: With dead ends: 2518 [2021-07-09 18:34:58,439 INFO L226 Difference]: Without dead ends: 2488 [2021-07-09 18:34:58,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2022.0ms TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:34:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-07-09 18:34:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1471. [2021-07-09 18:34:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.336734693877551) internal successors, (4905), 1470 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4905 transitions. [2021-07-09 18:34:58,470 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4905 transitions. Word has length 26 [2021-07-09 18:34:58,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:58,470 INFO L482 AbstractCegarLoop]: Abstraction has 1471 states and 4905 transitions. [2021-07-09 18:34:58,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4905 transitions. [2021-07-09 18:34:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:34:58,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:58,473 INFO L508 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] [2021-07-09 18:34:58,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-07-09 18:34:58,689 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:58,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 12 times [2021-07-09 18:34:58,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:58,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669659983] [2021-07-09 18:34:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:58,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:58,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669659983] [2021-07-09 18:34:58,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669659983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:58,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410005547] [2021-07-09 18:34:58,973 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 [2021-07-09 18:34:58,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:58,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:58,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:34:58,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:59,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:59,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-07-09 18:34:59,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,249 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:59,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:34:59,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:59,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:34:59,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,300 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:59,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:59,301 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,312 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:59,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:34:59,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,326 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:34:59,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:34:59,327 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,338 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:59,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:34:59,339 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,350 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:59,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:34:59,351 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,365 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:59,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:34:59,366 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,376 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:59,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:34:59,378 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,389 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:59,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:59,389 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,401 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:59,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:34:59,401 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:59,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-09 18:34:59,424 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,435 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:59,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:34:59,436 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,447 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:59,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:34:59,447 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:59,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:59,453 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:34:59,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-07-09 18:34:59,455 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:59,528 INFO L628 ElimStorePlain]: treesize reduction 46, result has 65.7 percent of original size [2021-07-09 18:34:59,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:34:59,529 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:88 [2021-07-09 18:34:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:34:59,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410005547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:59,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:59,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:34:59,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128361670] [2021-07-09 18:34:59,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:34:59,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:59,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:34:59,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:34:59,622 INFO L87 Difference]: Start difference. First operand 1471 states and 4905 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:01,075 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-07-09 18:35:01,405 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-09 18:35:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:01,874 INFO L93 Difference]: Finished difference Result 2131 states and 6893 transitions. [2021-07-09 18:35:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:35:01,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:01,878 INFO L225 Difference]: With dead ends: 2131 [2021-07-09 18:35:01,878 INFO L226 Difference]: Without dead ends: 2101 [2021-07-09 18:35:01,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2136.2ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:35:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2021-07-09 18:35:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1480. [2021-07-09 18:35:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1479 states have (on average 3.342799188640974) internal successors, (4944), 1479 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 4944 transitions. [2021-07-09 18:35:01,900 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 4944 transitions. Word has length 26 [2021-07-09 18:35:01,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:01,900 INFO L482 AbstractCegarLoop]: Abstraction has 1480 states and 4944 transitions. [2021-07-09 18:35:01,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 4944 transitions. [2021-07-09 18:35:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:01,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:01,902 INFO L508 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] [2021-07-09 18:35:02,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-07-09 18:35:02,103 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:02,103 INFO L82 PathProgramCache]: Analyzing trace with hash -165503173, now seen corresponding path program 13 times [2021-07-09 18:35:02,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:02,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785143966] [2021-07-09 18:35:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:02,420 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-09 18:35:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:02,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:02,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785143966] [2021-07-09 18:35:02,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785143966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:02,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377081509] [2021-07-09 18:35:02,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:35:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:02,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:35:02,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:02,958 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_36], 2=[A, v_prenex_34]} [2021-07-09 18:35:02,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,962 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 21 treesize of output 13 [2021-07-09 18:35:02,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:03,066 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-07-09 18:35:03,066 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-07-09 18:35:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:03,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:03,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:35:03,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:03,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:03,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:03,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:03,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:35:03,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:03,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:03,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:35:03,117 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-07-09 18:35:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:03,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377081509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:03,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:03,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:35:03,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253456134] [2021-07-09 18:35:03,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:35:03,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:03,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:35:03,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:35:03,144 INFO L87 Difference]: Start difference. First operand 1480 states and 4944 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:03,759 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-07-09 18:35:04,054 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-07-09 18:35:04,227 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-07-09 18:35:04,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:04,520 INFO L93 Difference]: Finished difference Result 2125 states and 6803 transitions. [2021-07-09 18:35:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:35:04,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:04,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:04,524 INFO L225 Difference]: With dead ends: 2125 [2021-07-09 18:35:04,525 INFO L226 Difference]: Without dead ends: 2110 [2021-07-09 18:35:04,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1620.2ms TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:35:04,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-07-09 18:35:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1482. [2021-07-09 18:35:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.3430114787305873) internal successors, (4951), 1481 states have internal predecessors, (4951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:04,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 4951 transitions. [2021-07-09 18:35:04,549 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 4951 transitions. Word has length 26 [2021-07-09 18:35:04,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:04,549 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 4951 transitions. [2021-07-09 18:35:04,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:04,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 4951 transitions. [2021-07-09 18:35:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:04,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:04,551 INFO L508 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] [2021-07-09 18:35:04,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-07-09 18:35:04,765 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:04,765 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-07-09 18:35:04,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:04,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192632572] [2021-07-09 18:35:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:05,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192632572] [2021-07-09 18:35:05,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192632572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681745555] [2021-07-09 18:35:05,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:05,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:35:05,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:05,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:35:05,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:05,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:35:05,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,638 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 30 treesize of output 16 [2021-07-09 18:35:05,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,646 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 30 treesize of output 16 [2021-07-09 18:35:05,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,653 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 37 treesize of output 19 [2021-07-09 18:35:05,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,661 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 35 treesize of output 19 [2021-07-09 18:35:05,662 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:35:05,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:35:05,679 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:35:05,687 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:35:05,696 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:35:05,704 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:35:05,712 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:35:05,719 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,726 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 41 treesize of output 16 [2021-07-09 18:35:05,727 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:35:05,733 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:05,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:05,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:35:05,738 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:05,756 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-07-09 18:35:05,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:35:05,757 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-09 18:35:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:05,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681745555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:05,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:05,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:35:05,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641366883] [2021-07-09 18:35:05,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:05,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:05,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:05,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:05,786 INFO L87 Difference]: Start difference. First operand 1482 states and 4951 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:06,499 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-07-09 18:35:06,929 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-09 18:35:07,545 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-07-09 18:35:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:08,881 INFO L93 Difference]: Finished difference Result 3327 states and 10302 transitions. [2021-07-09 18:35:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:35:08,882 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:08,887 INFO L225 Difference]: With dead ends: 3327 [2021-07-09 18:35:08,887 INFO L226 Difference]: Without dead ends: 3282 [2021-07-09 18:35:08,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 2775.6ms TimeCoverageRelationStatistics Valid=670, Invalid=3362, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:35:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-07-09 18:35:08,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1496. [2021-07-09 18:35:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3545150501672243) internal successors, (5015), 1495 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5015 transitions. [2021-07-09 18:35:08,913 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5015 transitions. Word has length 26 [2021-07-09 18:35:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:08,913 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5015 transitions. [2021-07-09 18:35:08,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5015 transitions. [2021-07-09 18:35:08,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:08,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:08,915 INFO L508 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] [2021-07-09 18:35:09,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-07-09 18:35:09,116 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:09,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1424367203, now seen corresponding path program 14 times [2021-07-09 18:35:09,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:09,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770612558] [2021-07-09 18:35:09,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:09,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:09,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770612558] [2021-07-09 18:35:09,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770612558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:09,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76355498] [2021-07-09 18:35:09,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:09,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:35:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:09,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:35:09,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:09,794 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-07-09 18:35:10,292 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:10,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-09 18:35:10,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:10,641 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 149 [2021-07-09 18:35:10,641 INFO L628 ElimStorePlain]: treesize reduction 201, result has 67.0 percent of original size [2021-07-09 18:35:10,676 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:35:10,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 [2021-07-09 18:35:10,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:10,823 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-09 18:35:10,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:10,824 INFO L518 ElimStorePlain]: Eliminatee v_prenex_82 vanished before elimination [2021-07-09 18:35:10,848 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:10,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:35:10,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:10,997 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-07-09 18:35:10,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,018 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:35:11,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:35:11,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,163 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-07-09 18:35:11,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,184 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:35:11,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:35:11,185 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,324 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-07-09 18:35:11,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,346 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:11,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 28 [2021-07-09 18:35:11,351 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,488 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-09 18:35:11,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-09 18:35:11,508 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,656 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 18:35:11,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:35:11,676 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,819 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-07-09 18:35:11,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,840 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:11,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:35:11,843 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:11,980 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:35:11,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:11,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-07-09 18:35:12,004 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:12,140 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-09 18:35:12,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:12,159 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:12,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:35:12,163 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:12,295 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:35:12,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:12,295 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-07-09 18:35:12,295 INFO L518 ElimStorePlain]: Eliminatee v_prenex_66 vanished before elimination [2021-07-09 18:35:12,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 14 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-09 18:35:12,311 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 28 variables, input treesize:631, output treesize:455 [2021-07-09 18:35:12,558 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-07-09 18:35:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:12,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76355498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:12,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:12,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:35:12,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626034040] [2021-07-09 18:35:12,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:12,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:12,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:12,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:12,685 INFO L87 Difference]: Start difference. First operand 1496 states and 5015 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:13,116 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-07-09 18:35:13,569 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2021-07-09 18:35:13,844 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-07-09 18:35:13,995 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-07-09 18:35:14,431 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-07-09 18:35:14,904 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-07-09 18:35:15,437 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-07-09 18:35:15,862 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-07-09 18:35:16,426 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2021-07-09 18:35:17,057 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2021-07-09 18:35:17,331 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-07-09 18:35:17,542 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-07-09 18:35:17,897 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2021-07-09 18:35:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:18,202 INFO L93 Difference]: Finished difference Result 2583 states and 8123 transitions. [2021-07-09 18:35:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:35:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:18,206 INFO L225 Difference]: With dead ends: 2583 [2021-07-09 18:35:18,206 INFO L226 Difference]: Without dead ends: 2553 [2021-07-09 18:35:18,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 5834.6ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:35:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-07-09 18:35:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1496. [2021-07-09 18:35:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3531772575250836) internal successors, (5013), 1495 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5013 transitions. [2021-07-09 18:35:18,231 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5013 transitions. Word has length 26 [2021-07-09 18:35:18,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:18,231 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5013 transitions. [2021-07-09 18:35:18,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5013 transitions. [2021-07-09 18:35:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:18,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:18,233 INFO L508 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] [2021-07-09 18:35:18,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:18,434 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:18,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:18,434 INFO L82 PathProgramCache]: Analyzing trace with hash 39724387, now seen corresponding path program 15 times [2021-07-09 18:35:18,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:18,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411088090] [2021-07-09 18:35:18,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:18,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:18,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411088090] [2021-07-09 18:35:18,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411088090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:18,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801477807] [2021-07-09 18:35:18,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:18,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:35:18,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:18,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:35:18,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:19,073 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-07-09 18:35:19,330 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-07-09 18:35:19,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:19,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:19,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:35:19,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:19,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:19,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:19,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:35:19,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:19,774 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 121 [2021-07-09 18:35:19,774 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.5 percent of original size [2021-07-09 18:35:19,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:19,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:19,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:35:19,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:19,921 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-07-09 18:35:19,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:19,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:19,936 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:19,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:35:19,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:20,069 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-09 18:35:20,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:20,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:20,082 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:20,082 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 28 treesize of output 20 [2021-07-09 18:35:20,084 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:20,205 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:35:20,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:20,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:20,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:20,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:35:20,221 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:20,337 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-09 18:35:20,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:20,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:20,349 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:20,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:35:20,350 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:20,465 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-07-09 18:35:20,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:20,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:20,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:20,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:35:20,481 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:20,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:20,490 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:20,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:35:20,491 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:20,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:20,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:20,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:20,602 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 28 treesize of output 24 [2021-07-09 18:35:20,606 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:20,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:20,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:35:20,699 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:158 [2021-07-09 18:35:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:20,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801477807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:20,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:20,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:35:20,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646047017] [2021-07-09 18:35:20,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:35:20,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:20,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:35:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:35:20,847 INFO L87 Difference]: Start difference. First operand 1496 states and 5013 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:21,974 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-07-09 18:35:22,481 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-09 18:35:22,891 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-07-09 18:35:23,231 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-07-09 18:35:23,787 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-07-09 18:35:24,179 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 64 [2021-07-09 18:35:24,677 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 73 [2021-07-09 18:35:25,207 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-07-09 18:35:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:25,326 INFO L93 Difference]: Finished difference Result 2835 states and 8886 transitions. [2021-07-09 18:35:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:35:25,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:25,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:25,330 INFO L225 Difference]: With dead ends: 2835 [2021-07-09 18:35:25,330 INFO L226 Difference]: Without dead ends: 2805 [2021-07-09 18:35:25,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 4579.4ms TimeCoverageRelationStatistics Valid=392, Invalid=1588, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:35:25,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2021-07-09 18:35:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 1506. [2021-07-09 18:35:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.359468438538206) internal successors, (5056), 1505 states have internal predecessors, (5056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5056 transitions. [2021-07-09 18:35:25,356 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5056 transitions. Word has length 26 [2021-07-09 18:35:25,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:25,356 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5056 transitions. [2021-07-09 18:35:25,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5056 transitions. [2021-07-09 18:35:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:25,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:25,358 INFO L508 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] [2021-07-09 18:35:25,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable839,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:25,559 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:25,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-07-09 18:35:25,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:25,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407424213] [2021-07-09 18:35:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:25,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:25,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407424213] [2021-07-09 18:35:25,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407424213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:25,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602981833] [2021-07-09 18:35:25,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:25,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:35:25,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:25,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:35:25,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:26,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,332 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 37 treesize of output 19 [2021-07-09 18:35:26,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:35:26,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:35:26,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,356 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 30 treesize of output 16 [2021-07-09 18:35:26,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:35:26,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:35:26,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:35:26,381 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:35:26,397 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,406 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 30 treesize of output 16 [2021-07-09 18:35:26,406 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:35:26,414 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:35:26,423 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:35:26,432 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,439 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 35 treesize of output 19 [2021-07-09 18:35:26,440 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:35:26,448 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:26,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:26,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:35:26,452 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:26,470 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-07-09 18:35:26,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:35:26,471 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-09 18:35:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:26,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602981833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:26,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:26,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:35:26,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370235221] [2021-07-09 18:35:26,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:26,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:26,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:26,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:26,513 INFO L87 Difference]: Start difference. First operand 1506 states and 5056 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:26,950 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-07-09 18:35:27,303 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-07-09 18:35:27,754 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-07-09 18:35:28,160 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-07-09 18:35:29,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:29,189 INFO L93 Difference]: Finished difference Result 2978 states and 9427 transitions. [2021-07-09 18:35:29,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:35:29,189 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:29,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:29,194 INFO L225 Difference]: With dead ends: 2978 [2021-07-09 18:35:29,194 INFO L226 Difference]: Without dead ends: 2933 [2021-07-09 18:35:29,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 2554.3ms TimeCoverageRelationStatistics Valid=591, Invalid=2715, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:35:29,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2021-07-09 18:35:29,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 1506. [2021-07-09 18:35:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.3601328903654486) internal successors, (5057), 1505 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:29,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5057 transitions. [2021-07-09 18:35:29,220 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5057 transitions. Word has length 26 [2021-07-09 18:35:29,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:29,220 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5057 transitions. [2021-07-09 18:35:29,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:29,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5057 transitions. [2021-07-09 18:35:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:29,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:29,222 INFO L508 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] [2021-07-09 18:35:29,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:29,437 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:29,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:29,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-07-09 18:35:29,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:29,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371485545] [2021-07-09 18:35:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:29,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:29,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371485545] [2021-07-09 18:35:29,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371485545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:29,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879930048] [2021-07-09 18:35:29,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:29,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:35:29,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:29,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:35:29,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:30,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,193 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:35:30,193 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 35 treesize of output 35 [2021-07-09 18:35:30,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,212 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:35:30,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:35:30,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:30,237 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 23 treesize of output 41 [2021-07-09 18:35:30,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,260 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:35:30,260 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 35 treesize of output 1 [2021-07-09 18:35:30,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,286 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:35:30,286 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 28 treesize of output 26 [2021-07-09 18:35:30,288 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,321 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:35:30,321 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 28 treesize of output 30 [2021-07-09 18:35:30,326 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,344 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:35:30,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:35:30,345 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,371 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-09 18:35:30,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-07-09 18:35:30,373 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,396 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-09 18:35:30,396 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 30 treesize of output 25 [2021-07-09 18:35:30,397 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,420 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-09 18:35:30,420 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 33 treesize of output 25 [2021-07-09 18:35:30,421 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,436 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:35:30,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:35:30,437 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,452 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:35:30,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:35:30,452 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,466 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:35:30,467 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 30 treesize of output 1 [2021-07-09 18:35:30,467 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,482 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:35:30,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:35:30,483 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,499 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:35:30,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:35:30,499 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:30,508 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:35:30,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:35:30,509 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:30,591 INFO L628 ElimStorePlain]: treesize reduction 42, result has 68.9 percent of original size [2021-07-09 18:35:30,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:35:30,593 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-07-09 18:35:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:30,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879930048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:30,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:30,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:35:30,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327141603] [2021-07-09 18:35:30,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:30,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:30,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:30,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:30,675 INFO L87 Difference]: Start difference. First operand 1506 states and 5057 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:31,486 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-07-09 18:35:32,012 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-07-09 18:35:32,588 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-07-09 18:35:33,267 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-07-09 18:35:33,471 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-07-09 18:35:33,603 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-07-09 18:35:33,794 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-07-09 18:35:33,973 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-07-09 18:35:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:34,361 INFO L93 Difference]: Finished difference Result 3558 states and 11107 transitions. [2021-07-09 18:35:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:35:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:34,367 INFO L225 Difference]: With dead ends: 3558 [2021-07-09 18:35:34,367 INFO L226 Difference]: Without dead ends: 3498 [2021-07-09 18:35:34,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 3341.6ms TimeCoverageRelationStatistics Valid=813, Invalid=3347, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:35:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-07-09 18:35:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 1522. [2021-07-09 18:35:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.3721236028928336) internal successors, (5129), 1521 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5129 transitions. [2021-07-09 18:35:34,403 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5129 transitions. Word has length 26 [2021-07-09 18:35:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:34,403 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5129 transitions. [2021-07-09 18:35:34,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5129 transitions. [2021-07-09 18:35:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:34,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:34,405 INFO L508 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] [2021-07-09 18:35:34,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-07-09 18:35:34,609 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:34,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:34,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 16 times [2021-07-09 18:35:34,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:34,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021715858] [2021-07-09 18:35:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:35,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:35,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021715858] [2021-07-09 18:35:35,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021715858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:35,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319104494] [2021-07-09 18:35:35,080 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 [2021-07-09 18:35:35,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:35:35,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:35:35,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:35,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:35:35,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:35,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:35,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:35:35,528 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:35,535 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:35,542 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:35,549 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:35,556 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:35:35,564 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:35,571 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:35:35,578 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:35,585 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:35,592 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:35,598 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:35,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:35,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:35:35,602 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:35,623 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-07-09 18:35:35,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:35:35,624 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-09 18:35:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:35,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319104494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:35,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:35,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:35:35,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428134898] [2021-07-09 18:35:35,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:35:35,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:35:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:35:35,650 INFO L87 Difference]: Start difference. First operand 1522 states and 5129 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:36,404 INFO L93 Difference]: Finished difference Result 1905 states and 6288 transitions. [2021-07-09 18:35:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:35:36,404 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:36,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:36,407 INFO L225 Difference]: With dead ends: 1905 [2021-07-09 18:35:36,407 INFO L226 Difference]: Without dead ends: 1890 [2021-07-09 18:35:36,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1102.1ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:35:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-07-09 18:35:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1530. [2021-07-09 18:35:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 3.368214519293656) internal successors, (5150), 1529 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:36,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 5150 transitions. [2021-07-09 18:35:36,427 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 5150 transitions. Word has length 26 [2021-07-09 18:35:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:36,427 INFO L482 AbstractCegarLoop]: Abstraction has 1530 states and 5150 transitions. [2021-07-09 18:35:36,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 5150 transitions. [2021-07-09 18:35:36,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:36,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:36,429 INFO L508 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] [2021-07-09 18:35:36,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1072,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:36,630 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:36,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:36,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1807218181, now seen corresponding path program 17 times [2021-07-09 18:35:36,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:36,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440232727] [2021-07-09 18:35:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:36,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:36,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440232727] [2021-07-09 18:35:36,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440232727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:36,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272840823] [2021-07-09 18:35:36,932 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 [2021-07-09 18:35:36,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:35:36,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:36,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:35:36,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:37,741 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-07-09 18:35:37,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:37,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:37,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:37,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:38,007 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-07-09 18:35:38,008 INFO L628 ElimStorePlain]: treesize reduction 55, result has 71.1 percent of original size [2021-07-09 18:35:38,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:38,013 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 23 treesize of output 13 [2021-07-09 18:35:38,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:38,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:38,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:38,019 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 30 treesize of output 16 [2021-07-09 18:35:38,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:38,087 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.2 percent of original size [2021-07-09 18:35:38,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:38,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:38,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:35:38,093 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:38,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:38,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:35:38,123 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:211, output treesize:25 [2021-07-09 18:35:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:38,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272840823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:38,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:38,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:35:38,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359425571] [2021-07-09 18:35:38,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:38,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:38,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:38,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:38,170 INFO L87 Difference]: Start difference. First operand 1530 states and 5150 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:38,999 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-07-09 18:35:39,423 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2021-07-09 18:35:39,725 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-07-09 18:35:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:40,017 INFO L93 Difference]: Finished difference Result 2016 states and 6558 transitions. [2021-07-09 18:35:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:35:40,017 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:40,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:40,020 INFO L225 Difference]: With dead ends: 2016 [2021-07-09 18:35:40,020 INFO L226 Difference]: Without dead ends: 1971 [2021-07-09 18:35:40,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2274.8ms TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:35:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-07-09 18:35:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1522. [2021-07-09 18:35:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.3721236028928336) internal successors, (5129), 1521 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5129 transitions. [2021-07-09 18:35:40,048 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5129 transitions. Word has length 26 [2021-07-09 18:35:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:40,049 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5129 transitions. [2021-07-09 18:35:40,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5129 transitions. [2021-07-09 18:35:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:40,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:40,051 INFO L508 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] [2021-07-09 18:35:40,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1114 [2021-07-09 18:35:40,267 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:40,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:40,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 18 times [2021-07-09 18:35:40,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:40,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326969341] [2021-07-09 18:35:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:40,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:40,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326969341] [2021-07-09 18:35:40,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326969341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:40,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687508822] [2021-07-09 18:35:40,538 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 [2021-07-09 18:35:40,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:35:40,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:35:40,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:40,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,925 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:40,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:40,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:40,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:40,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:35:40,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:40,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,951 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:40,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:40,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:40,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,963 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:40,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:40,964 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:40,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,983 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:40,983 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 28 treesize of output 16 [2021-07-09 18:35:40,984 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:40,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:40,995 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:40,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:35:40,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,006 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:41,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:41,007 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,016 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:41,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:41,017 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,034 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:41,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:35:41,036 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,048 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:41,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:35:41,049 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,063 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:41,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:35:41,064 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,073 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:41,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:41,074 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:41,085 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 16 treesize of output 18 [2021-07-09 18:35:41,089 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,098 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:41,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:41,099 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,107 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:41,107 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 28 treesize of output 16 [2021-07-09 18:35:41,108 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:41,114 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:41,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:35:41,115 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:41,195 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.5 percent of original size [2021-07-09 18:35:41,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:35:41,198 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:71 [2021-07-09 18:35:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:41,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687508822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:41,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:41,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:35:41,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676880002] [2021-07-09 18:35:41,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:35:41,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:41,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:35:41,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:35:41,293 INFO L87 Difference]: Start difference. First operand 1522 states and 5129 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:41,884 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-07-09 18:35:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:42,588 INFO L93 Difference]: Finished difference Result 1999 states and 6574 transitions. [2021-07-09 18:35:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:35:42,589 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:42,592 INFO L225 Difference]: With dead ends: 1999 [2021-07-09 18:35:42,592 INFO L226 Difference]: Without dead ends: 1984 [2021-07-09 18:35:42,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1273.8ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:35:42,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-07-09 18:35:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1516. [2021-07-09 18:35:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.3716171617161717) internal successors, (5108), 1515 states have internal predecessors, (5108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5108 transitions. [2021-07-09 18:35:42,612 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5108 transitions. Word has length 26 [2021-07-09 18:35:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:42,612 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 5108 transitions. [2021-07-09 18:35:42,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5108 transitions. [2021-07-09 18:35:42,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:42,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:42,614 INFO L508 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] [2021-07-09 18:35:42,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1137,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:42,815 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:42,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 19 times [2021-07-09 18:35:42,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:42,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794796313] [2021-07-09 18:35:42,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:43,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:43,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794796313] [2021-07-09 18:35:43,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794796313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:43,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385332460] [2021-07-09 18:35:43,276 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 [2021-07-09 18:35:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:43,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:35:43,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:43,619 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-07-09 18:35:43,793 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-07-09 18:35:43,870 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_133], 2=[A, v_prenex_132]} [2021-07-09 18:35:43,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:43,874 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 21 treesize of output 13 [2021-07-09 18:35:43,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:43,977 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-07-09 18:35:43,977 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-07-09 18:35:43,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:43,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:43,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:35:43,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:44,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:44,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:44,031 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 23 treesize of output 13 [2021-07-09 18:35:44,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:44,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:44,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:44,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:44,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:44,084 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-07-09 18:35:44,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:35:44,086 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-07-09 18:35:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:44,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385332460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:44,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:44,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:35:44,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995313118] [2021-07-09 18:35:44,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:35:44,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:44,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:35:44,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:35:44,124 INFO L87 Difference]: Start difference. First operand 1516 states and 5108 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:44,386 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-07-09 18:35:45,076 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-09 18:35:45,463 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-07-09 18:35:45,659 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-07-09 18:35:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:45,773 INFO L93 Difference]: Finished difference Result 2061 states and 6772 transitions. [2021-07-09 18:35:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:35:45,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:45,777 INFO L225 Difference]: With dead ends: 2061 [2021-07-09 18:35:45,777 INFO L226 Difference]: Without dead ends: 2046 [2021-07-09 18:35:45,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2107.4ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:35:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-07-09 18:35:45,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1517. [2021-07-09 18:35:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3726912928759893) internal successors, (5113), 1516 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5113 transitions. [2021-07-09 18:35:45,799 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5113 transitions. Word has length 26 [2021-07-09 18:35:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:45,799 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 5113 transitions. [2021-07-09 18:35:45,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5113 transitions. [2021-07-09 18:35:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:45,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:45,802 INFO L508 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] [2021-07-09 18:35:46,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1186,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:46,002 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:46,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:46,002 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 20 times [2021-07-09 18:35:46,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:46,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319478488] [2021-07-09 18:35:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:46,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:46,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319478488] [2021-07-09 18:35:46,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319478488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:46,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020596866] [2021-07-09 18:35:46,202 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 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 [2021-07-09 18:35:46,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:35:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:46,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:35:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:46,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,839 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:35:46,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:35:46,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:46,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:46,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:35:46,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:46,983 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-09 18:35:46,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:46,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:47,005 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:47,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:35:47,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:47,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:47,024 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:47,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:35:47,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:47,144 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-07-09 18:35:47,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:47,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:47,166 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:47,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:35:47,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:47,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:47,184 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:47,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:35:47,186 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:47,298 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-07-09 18:35:47,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:47,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:47,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:47,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-07-09 18:35:47,320 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:47,335 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:35:47,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:35:47,336 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:47,444 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-07-09 18:35:47,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:47,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:35:47,458 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:329, output treesize:224 [2021-07-09 18:35:47,630 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-07-09 18:35:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:47,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020596866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:47,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:47,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:35:47,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882852137] [2021-07-09 18:35:47,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:35:47,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:47,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:35:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:35:47,661 INFO L87 Difference]: Start difference. First operand 1517 states and 5113 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:48,641 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-07-09 18:35:49,337 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-07-09 18:35:49,522 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-07-09 18:35:49,804 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-07-09 18:35:49,984 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-07-09 18:35:50,176 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-07-09 18:35:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:50,347 INFO L93 Difference]: Finished difference Result 2205 states and 7070 transitions. [2021-07-09 18:35:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:35:50,348 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:50,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:50,351 INFO L225 Difference]: With dead ends: 2205 [2021-07-09 18:35:50,351 INFO L226 Difference]: Without dead ends: 2165 [2021-07-09 18:35:50,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2803.3ms TimeCoverageRelationStatistics Valid=350, Invalid=1906, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:35:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-07-09 18:35:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 1566. [2021-07-09 18:35:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3686900958466452) internal successors, (5272), 1565 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5272 transitions. [2021-07-09 18:35:50,374 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5272 transitions. Word has length 26 [2021-07-09 18:35:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:50,374 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 5272 transitions. [2021-07-09 18:35:50,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5272 transitions. [2021-07-09 18:35:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:50,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:50,376 INFO L508 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] [2021-07-09 18:35:50,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-07-09 18:35:50,581 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:50,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1409101781, now seen corresponding path program 21 times [2021-07-09 18:35:50,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:50,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608788558] [2021-07-09 18:35:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:50,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:50,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608788558] [2021-07-09 18:35:50,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608788558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:50,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18814114] [2021-07-09 18:35:50,782 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 [2021-07-09 18:35:50,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:35:50,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:50,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:35:50,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:51,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:51,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:35:51,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:51,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-07-09 18:35:51,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,136 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:51,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-09 18:35:51,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,145 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:51,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-09 18:35:51,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,156 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:51,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-09 18:35:51,156 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,165 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:51,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:51,165 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,184 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:51,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:35:51,187 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,206 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:35:51,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:35:51,208 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,225 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:35:51,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:35:51,226 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,235 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:51,235 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:51,235 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,245 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:51,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:35:51,246 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,255 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:51,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-07-09 18:35:51,256 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,264 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:51,264 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:51,264 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,272 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:51,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:35:51,273 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,288 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:35:51,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:35:51,289 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,295 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:35:51,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:51,295 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:51,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:51,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 18:35:51,356 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:729, output treesize:157 [2021-07-09 18:35:51,480 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-07-09 18:35:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:51,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18814114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:51,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:51,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:35:51,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798571319] [2021-07-09 18:35:51,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:35:51,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:51,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:35:51,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:35:51,647 INFO L87 Difference]: Start difference. First operand 1566 states and 5272 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:52,419 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-09 18:35:52,546 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-07-09 18:35:53,111 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-09 18:35:53,292 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-07-09 18:35:53,637 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-07-09 18:35:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:53,799 INFO L93 Difference]: Finished difference Result 2352 states and 7640 transitions. [2021-07-09 18:35:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:35:53,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:53,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:53,802 INFO L225 Difference]: With dead ends: 2352 [2021-07-09 18:35:53,802 INFO L226 Difference]: Without dead ends: 2327 [2021-07-09 18:35:53,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2234.9ms TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:35:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-07-09 18:35:53,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 1537. [2021-07-09 18:35:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.373046875) internal successors, (5181), 1536 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5181 transitions. [2021-07-09 18:35:53,824 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5181 transitions. Word has length 26 [2021-07-09 18:35:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:53,824 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 5181 transitions. [2021-07-09 18:35:53,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:53,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5181 transitions. [2021-07-09 18:35:53,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:53,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:53,827 INFO L508 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] [2021-07-09 18:35:54,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1260,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:54,027 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:54,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:54,027 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 22 times [2021-07-09 18:35:54,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:54,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545232843] [2021-07-09 18:35:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:54,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:54,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545232843] [2021-07-09 18:35:54,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545232843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:54,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949771766] [2021-07-09 18:35:54,240 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 [2021-07-09 18:35:54,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:35:54,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:54,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:35:54,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:54,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:54,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:54,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:54,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:35:54,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:54,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:54,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:54,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:54,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:54,649 INFO L628 ElimStorePlain]: treesize reduction 108, result has 42.2 percent of original size [2021-07-09 18:35:54,649 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-07-09 18:35:54,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:54,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:54,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:35:54,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:54,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:54,681 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 23 treesize of output 13 [2021-07-09 18:35:54,682 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:54,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:54,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:35:54,703 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:24 [2021-07-09 18:35:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:54,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949771766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:54,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:54,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:35:54,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261685542] [2021-07-09 18:35:54,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:35:54,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:35:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:35:54,747 INFO L87 Difference]: Start difference. First operand 1537 states and 5181 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) [2021-07-09 18:35:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:55,074 INFO L93 Difference]: Finished difference Result 1678 states and 5570 transitions. [2021-07-09 18:35:55,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:35:55,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:55,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:55,078 INFO L225 Difference]: With dead ends: 1678 [2021-07-09 18:35:55,078 INFO L226 Difference]: Without dead ends: 1663 [2021-07-09 18:35:55,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:35:55,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-07-09 18:35:55,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1561. [2021-07-09 18:35:55,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.3705128205128205) internal successors, (5258), 1560 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 5258 transitions. [2021-07-09 18:35:55,098 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 5258 transitions. Word has length 26 [2021-07-09 18:35:55,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:55,098 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 5258 transitions. [2021-07-09 18:35:55,098 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) [2021-07-09 18:35:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 5258 transitions. [2021-07-09 18:35:55,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:55,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:55,101 INFO L508 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] [2021-07-09 18:35:55,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1316,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:55,301 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:55,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1766954001, now seen corresponding path program 23 times [2021-07-09 18:35:55,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:55,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960119432] [2021-07-09 18:35:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:55,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:55,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960119432] [2021-07-09 18:35:55,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960119432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:55,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076805529] [2021-07-09 18:35:55,504 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 [2021-07-09 18:35:55,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:35:55,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:55,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:35:55,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:55,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,729 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:55,729 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 28 treesize of output 16 [2021-07-09 18:35:55,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,737 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:55,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:55,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,748 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:55,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:35:55,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,757 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:55,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:55,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:55,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:35:55,768 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,780 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:55,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:35:55,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,799 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:55,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:55,800 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,811 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:55,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:35:55,812 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:55,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:35:55,823 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,831 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:55,831 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 28 treesize of output 16 [2021-07-09 18:35:55,832 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:55,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:35:55,841 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,849 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:55,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:55,849 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,867 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:55,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:55,868 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,876 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:55,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:35:55,876 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,884 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:55,884 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 28 treesize of output 16 [2021-07-09 18:35:55,884 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:55,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:55,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:35:55,894 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:55,956 INFO L628 ElimStorePlain]: treesize reduction 55, result has 55.6 percent of original size [2021-07-09 18:35:55,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:35:55,957 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:569, output treesize:69 [2021-07-09 18:35:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:56,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076805529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:56,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:56,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:35:56,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417314979] [2021-07-09 18:35:56,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:35:56,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:56,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:35:56,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:35:56,047 INFO L87 Difference]: Start difference. First operand 1561 states and 5258 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:56,886 INFO L93 Difference]: Finished difference Result 2101 states and 6894 transitions. [2021-07-09 18:35:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:35:56,886 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:56,890 INFO L225 Difference]: With dead ends: 2101 [2021-07-09 18:35:56,890 INFO L226 Difference]: Without dead ends: 2076 [2021-07-09 18:35:56,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 902.1ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:35:56,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-07-09 18:35:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1550. [2021-07-09 18:35:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.378954163976759) internal successors, (5234), 1549 states have internal predecessors, (5234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5234 transitions. [2021-07-09 18:35:56,910 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5234 transitions. Word has length 26 [2021-07-09 18:35:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:56,910 INFO L482 AbstractCegarLoop]: Abstraction has 1550 states and 5234 transitions. [2021-07-09 18:35:56,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:56,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5234 transitions. [2021-07-09 18:35:56,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:56,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:56,912 INFO L508 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] [2021-07-09 18:35:57,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1330 [2021-07-09 18:35:57,113 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:57,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:57,113 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 24 times [2021-07-09 18:35:57,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:57,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431719810] [2021-07-09 18:35:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:57,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:57,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431719810] [2021-07-09 18:35:57,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431719810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:57,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429104505] [2021-07-09 18:35:57,423 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 [2021-07-09 18:35:57,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:35:57,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:57,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:35:57,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:57,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:57,652 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 28 treesize of output 24 [2021-07-09 18:35:57,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,666 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:57,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:35:57,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,675 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:57,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:35:57,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,698 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:57,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:57,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,710 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:57,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-07-09 18:35:57,711 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,720 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:57,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:57,721 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,745 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:57,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:35:57,747 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,756 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:57,756 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 28 treesize of output 1 [2021-07-09 18:35:57,757 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,764 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:57,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:35:57,765 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,786 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:35:57,786 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 28 treesize of output 20 [2021-07-09 18:35:57,787 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,795 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:57,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:35:57,796 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,806 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:57,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:35:57,806 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,815 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:57,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:35:57,816 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,823 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:57,823 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 28 treesize of output 16 [2021-07-09 18:35:57,824 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:57,833 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 16 treesize of output 18 [2021-07-09 18:35:57,836 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:57,841 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:35:57,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:35:57,842 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:57,908 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-07-09 18:35:57,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:35:57,909 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-07-09 18:35:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:57,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429104505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:57,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:57,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:35:57,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163041259] [2021-07-09 18:35:57,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:35:57,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:35:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:35:57,987 INFO L87 Difference]: Start difference. First operand 1550 states and 5234 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:59,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:59,241 INFO L93 Difference]: Finished difference Result 2118 states and 6970 transitions. [2021-07-09 18:35:59,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:35:59,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:35:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:59,245 INFO L225 Difference]: With dead ends: 2118 [2021-07-09 18:35:59,245 INFO L226 Difference]: Without dead ends: 2084 [2021-07-09 18:35:59,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1299.6ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:35:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-07-09 18:35:59,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1569. [2021-07-09 18:35:59,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 3.3832908163265305) internal successors, (5305), 1568 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 5305 transitions. [2021-07-09 18:35:59,267 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 5305 transitions. Word has length 26 [2021-07-09 18:35:59,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:59,267 INFO L482 AbstractCegarLoop]: Abstraction has 1569 states and 5305 transitions. [2021-07-09 18:35:59,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:59,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 5305 transitions. [2021-07-09 18:35:59,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:35:59,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:59,270 INFO L508 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] [2021-07-09 18:35:59,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1344 [2021-07-09 18:35:59,470 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:59,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 25 times [2021-07-09 18:35:59,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:59,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325041294] [2021-07-09 18:35:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:35:59,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:59,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325041294] [2021-07-09 18:35:59,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325041294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:59,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388753299] [2021-07-09 18:35:59,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:59,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:35:59,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:00,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:00,413 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:00,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-07-09 18:36:00,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:00,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:00,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:00,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-09 18:36:00,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:00,798 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-07-09 18:36:00,798 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.4 percent of original size [2021-07-09 18:36:00,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:00,820 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:00,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:36:00,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:00,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:00,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:00,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-07-09 18:36:00,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:00,996 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-07-09 18:36:00,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:01,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:01,022 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:01,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:36:01,023 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:01,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:01,049 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:01,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:36:01,053 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:01,205 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-09 18:36:01,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:01,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:01,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:01,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:36:01,229 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:01,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:01,246 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:01,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:36:01,248 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:01,525 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-07-09 18:36:01,525 INFO L628 ElimStorePlain]: treesize reduction 16, result has 95.3 percent of original size [2021-07-09 18:36:01,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:01,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:01,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:36:01,553 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:01,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:01,570 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:01,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:36:01,572 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:01,838 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-09 18:36:01,838 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-07-09 18:36:01,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-09 18:36:01,861 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:253 [2021-07-09 18:36:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:02,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388753299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:02,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:02,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:36:02,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251441900] [2021-07-09 18:36:02,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:36:02,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:02,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:36:02,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:36:02,019 INFO L87 Difference]: Start difference. First operand 1569 states and 5305 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:02,484 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-07-09 18:36:03,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:03,149 INFO L93 Difference]: Finished difference Result 2132 states and 7032 transitions. [2021-07-09 18:36:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:36:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:03,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:03,153 INFO L225 Difference]: With dead ends: 2132 [2021-07-09 18:36:03,153 INFO L226 Difference]: Without dead ends: 2107 [2021-07-09 18:36:03,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1509.0ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:36:03,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-07-09 18:36:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1575. [2021-07-09 18:36:03,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.3818297331639138) internal successors, (5323), 1574 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5323 transitions. [2021-07-09 18:36:03,173 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5323 transitions. Word has length 26 [2021-07-09 18:36:03,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:03,173 INFO L482 AbstractCegarLoop]: Abstraction has 1575 states and 5323 transitions. [2021-07-09 18:36:03,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:03,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5323 transitions. [2021-07-09 18:36:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:03,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:03,176 INFO L508 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] [2021-07-09 18:36:03,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-07-09 18:36:03,376 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:03,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-07-09 18:36:03,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:03,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821793459] [2021-07-09 18:36:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:03,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:03,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821793459] [2021-07-09 18:36:03,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821793459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:03,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804929362] [2021-07-09 18:36:03,694 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 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 [2021-07-09 18:36:03,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:36:03,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:03,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:36:03,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:04,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,201 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 30 treesize of output 16 [2021-07-09 18:36:04,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:36:04,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:36:04,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:36:04,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:36:04,232 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,238 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 35 treesize of output 19 [2021-07-09 18:36:04,239 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:36:04,246 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,252 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 30 treesize of output 16 [2021-07-09 18:36:04,253 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,259 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 37 treesize of output 19 [2021-07-09 18:36:04,260 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:36:04,267 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:36:04,273 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:36:04,280 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:36:04,287 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:36:04,293 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:04,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:04,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:36:04,297 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:04,315 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-07-09 18:36:04,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:36:04,316 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-09 18:36:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:04,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804929362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:04,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:04,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:36:04,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003393920] [2021-07-09 18:36:04,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:04,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:04,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:04,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:04,338 INFO L87 Difference]: Start difference. First operand 1575 states and 5323 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:05,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:05,324 INFO L93 Difference]: Finished difference Result 2018 states and 6640 transitions. [2021-07-09 18:36:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:36:05,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:05,328 INFO L225 Difference]: With dead ends: 2018 [2021-07-09 18:36:05,328 INFO L226 Difference]: Without dead ends: 1992 [2021-07-09 18:36:05,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1117.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:36:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-07-09 18:36:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1579. [2021-07-09 18:36:05,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.379594423320659) internal successors, (5333), 1578 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5333 transitions. [2021-07-09 18:36:05,350 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5333 transitions. Word has length 26 [2021-07-09 18:36:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:05,351 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5333 transitions. [2021-07-09 18:36:05,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5333 transitions. [2021-07-09 18:36:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:05,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:05,353 INFO L508 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] [2021-07-09 18:36:05,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1437,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:05,554 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-07-09 18:36:05,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:05,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343298154] [2021-07-09 18:36:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:05,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:05,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343298154] [2021-07-09 18:36:05,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343298154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:05,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036228875] [2021-07-09 18:36:05,871 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 [2021-07-09 18:36:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:05,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:36:05,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:06,204 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_163], 5=[v_prenex_165, v_prenex_167]} [2021-07-09 18:36:06,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:06,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:06,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:06,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:36:06,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:06,291 INFO L628 ElimStorePlain]: treesize reduction 135, result has 43.3 percent of original size [2021-07-09 18:36:06,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:06,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:06,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:36:06,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:06,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:06,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:06,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 13 [2021-07-09 18:36:06,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:06,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:06,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:06,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:06,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 13 [2021-07-09 18:36:06,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:06,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:06,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:36:06,370 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:24 [2021-07-09 18:36:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:06,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036228875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:06,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:06,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:36:06,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376864073] [2021-07-09 18:36:06,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:06,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:06,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:06,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:06,406 INFO L87 Difference]: Start difference. First operand 1579 states and 5333 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:07,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:07,995 INFO L93 Difference]: Finished difference Result 2235 states and 7337 transitions. [2021-07-09 18:36:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:36:07,995 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:08,000 INFO L225 Difference]: With dead ends: 2235 [2021-07-09 18:36:08,000 INFO L226 Difference]: Without dead ends: 2220 [2021-07-09 18:36:08,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1676.5ms TimeCoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:36:08,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-07-09 18:36:08,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1579. [2021-07-09 18:36:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.379594423320659) internal successors, (5333), 1578 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5333 transitions. [2021-07-09 18:36:08,025 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5333 transitions. Word has length 26 [2021-07-09 18:36:08,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:08,025 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5333 transitions. [2021-07-09 18:36:08,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5333 transitions. [2021-07-09 18:36:08,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:08,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:08,028 INFO L508 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] [2021-07-09 18:36:08,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1545 [2021-07-09 18:36:08,228 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:08,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 26 times [2021-07-09 18:36:08,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:08,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560771221] [2021-07-09 18:36:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:08,465 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-07-09 18:36:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:08,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:08,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560771221] [2021-07-09 18:36:08,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560771221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:08,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576269733] [2021-07-09 18:36:08,621 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 [2021-07-09 18:36:08,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:36:08,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:08,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:36:08,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:08,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:08,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:36:08,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,872 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:08,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:36:08,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,881 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:08,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:36:08,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,889 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:08,889 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 28 treesize of output 16 [2021-07-09 18:36:08,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,900 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:08,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-07-09 18:36:08,901 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,910 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:08,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:36:08,912 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,922 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:08,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:36:08,924 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,932 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:08,932 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 28 treesize of output 1 [2021-07-09 18:36:08,933 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,941 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:08,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:36:08,941 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,952 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:08,952 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 28 treesize of output 20 [2021-07-09 18:36:08,953 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,961 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:08,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:36:08,962 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,971 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:08,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:36:08,972 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,982 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:08,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:36:08,982 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,990 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:08,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:36:08,990 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:08,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:08,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:09,000 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 16 treesize of output 18 [2021-07-09 18:36:09,003 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:09,008 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:09,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:36:09,009 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:09,076 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-07-09 18:36:09,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:36:09,077 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-07-09 18:36:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:09,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576269733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:09,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:09,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:36:09,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504879771] [2021-07-09 18:36:09,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:09,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:09,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:09,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:09,158 INFO L87 Difference]: Start difference. First operand 1579 states and 5333 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:09,677 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-07-09 18:36:10,264 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 18:36:10,441 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-07-09 18:36:10,589 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-07-09 18:36:10,787 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-07-09 18:36:10,976 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-07-09 18:36:11,320 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-07-09 18:36:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:11,567 INFO L93 Difference]: Finished difference Result 2244 states and 7303 transitions. [2021-07-09 18:36:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:36:11,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:11,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:11,570 INFO L225 Difference]: With dead ends: 2244 [2021-07-09 18:36:11,570 INFO L226 Difference]: Without dead ends: 2225 [2021-07-09 18:36:11,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2348.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:36:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-07-09 18:36:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1598. [2021-07-09 18:36:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 3.3844708829054477) internal successors, (5405), 1597 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 5405 transitions. [2021-07-09 18:36:11,593 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 5405 transitions. Word has length 26 [2021-07-09 18:36:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:11,593 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 5405 transitions. [2021-07-09 18:36:11,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 5405 transitions. [2021-07-09 18:36:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:11,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:11,595 INFO L508 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] [2021-07-09 18:36:11,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1559,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:11,796 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:11,796 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-07-09 18:36:11,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:11,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381141470] [2021-07-09 18:36:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:12,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:12,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381141470] [2021-07-09 18:36:12,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381141470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:12,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694355265] [2021-07-09 18:36:12,095 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 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 [2021-07-09 18:36:12,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:36:12,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:12,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:36:12,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:12,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,625 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-07-09 18:36:12,625 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 33 treesize of output 41 [2021-07-09 18:36:12,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,661 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-07-09 18:36:12,661 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 35 treesize of output 26 [2021-07-09 18:36:12,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,689 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 18:36:12,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:36:12,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,717 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:36:12,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-07-09 18:36:12,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,761 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:36:12,761 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 28 treesize of output 28 [2021-07-09 18:36:12,765 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,781 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:12,782 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 35 treesize of output 1 [2021-07-09 18:36:12,782 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,797 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:12,797 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 32 treesize of output 1 [2021-07-09 18:36:12,797 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,812 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:12,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:36:12,813 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,828 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:12,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:36:12,828 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,843 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:12,843 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 28 treesize of output 1 [2021-07-09 18:36:12,843 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,858 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:12,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:36:12,858 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,872 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:12,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:36:12,873 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,886 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:12,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:36:12,887 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,900 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:12,900 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 37 treesize of output 1 [2021-07-09 18:36:12,901 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:12,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-09 18:36:12,928 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:12,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:12,935 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:12,935 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 30 treesize of output 1 [2021-07-09 18:36:12,936 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:13,067 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-07-09 18:36:13,067 INFO L628 ElimStorePlain]: treesize reduction 34, result has 75.2 percent of original size [2021-07-09 18:36:13,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:36:13,069 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:745, output treesize:75 [2021-07-09 18:36:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:13,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694355265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:13,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:13,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-07-09 18:36:13,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386385772] [2021-07-09 18:36:13,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:36:13,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:13,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:36:13,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:36:13,140 INFO L87 Difference]: Start difference. First operand 1598 states and 5405 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-07-09 18:36:15,086 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-07-09 18:36:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:15,363 INFO L93 Difference]: Finished difference Result 2476 states and 7899 transitions. [2021-07-09 18:36:15,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:36:15,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:15,367 INFO L225 Difference]: With dead ends: 2476 [2021-07-09 18:36:15,367 INFO L226 Difference]: Without dead ends: 2432 [2021-07-09 18:36:15,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 2185.1ms TimeCoverageRelationStatistics Valid=508, Invalid=2572, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:36:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-07-09 18:36:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1605. [2021-07-09 18:36:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.385286783042394) internal successors, (5430), 1604 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) [2021-07-09 18:36:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5430 transitions. [2021-07-09 18:36:15,390 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5430 transitions. Word has length 26 [2021-07-09 18:36:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:15,390 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5430 transitions. [2021-07-09 18:36:15,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-07-09 18:36:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5430 transitions. [2021-07-09 18:36:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:15,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:15,392 INFO L508 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] [2021-07-09 18:36:15,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1578 [2021-07-09 18:36:15,593 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:15,593 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-07-09 18:36:15,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:15,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623591655] [2021-07-09 18:36:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:15,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:15,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623591655] [2021-07-09 18:36:15,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623591655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:15,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470913626] [2021-07-09 18:36:15,811 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 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 [2021-07-09 18:36:15,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:36:15,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:15,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:36:15,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:16,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,463 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:36:16,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-07-09 18:36:16,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,515 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:36:16,515 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 35 treesize of output 47 [2021-07-09 18:36:16,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,568 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:36:16,568 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 23 treesize of output 49 [2021-07-09 18:36:16,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,596 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:36:16,597 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 30 treesize of output 1 [2021-07-09 18:36:16,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,640 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:36:16,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:36:16,644 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,684 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:36:16,684 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 30 treesize of output 44 [2021-07-09 18:36:16,693 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,710 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:36:16,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:36:16,711 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,755 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-07-09 18:36:16,755 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 35 treesize of output 51 [2021-07-09 18:36:16,761 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,781 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:36:16,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:36:16,781 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,829 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:36:16,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 55 [2021-07-09 18:36:16,837 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,887 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-07-09 18:36:16,887 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-07-09 18:36:16,894 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,914 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:36:16,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:36:16,914 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,934 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:36:16,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:36:16,935 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:16,975 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:36:16,976 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 28 treesize of output 44 [2021-07-09 18:36:16,980 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:16,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,000 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-07-09 18:36:17,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:36:17,001 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:17,034 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-09 18:36:17,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-07-09 18:36:17,040 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:17,457 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-07-09 18:36:17,457 INFO L628 ElimStorePlain]: treesize reduction 198, result has 63.1 percent of original size [2021-07-09 18:36:17,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:36:17,475 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:945, output treesize:413 [2021-07-09 18:36:17,708 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 18:36:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:17,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470913626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:17,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:17,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:36:17,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827421488] [2021-07-09 18:36:17,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:36:17,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:17,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:36:17,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:36:17,866 INFO L87 Difference]: Start difference. First operand 1605 states and 5430 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:20,432 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-09 18:36:21,109 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-07-09 18:36:21,302 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-07-09 18:36:21,610 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-07-09 18:36:21,767 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-09 18:36:21,925 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-07-09 18:36:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:22,133 INFO L93 Difference]: Finished difference Result 3600 states and 11338 transitions. [2021-07-09 18:36:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:36:22,134 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:22,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:22,140 INFO L225 Difference]: With dead ends: 3600 [2021-07-09 18:36:22,140 INFO L226 Difference]: Without dead ends: 3564 [2021-07-09 18:36:22,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4132.6ms TimeCoverageRelationStatistics Valid=893, Invalid=4959, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:36:22,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-07-09 18:36:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 1759. [2021-07-09 18:36:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 3.4044368600682593) internal successors, (5985), 1758 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 5985 transitions. [2021-07-09 18:36:22,171 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 5985 transitions. Word has length 26 [2021-07-09 18:36:22,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:22,171 INFO L482 AbstractCegarLoop]: Abstraction has 1759 states and 5985 transitions. [2021-07-09 18:36:22,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:22,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 5985 transitions. [2021-07-09 18:36:22,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:22,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:22,174 INFO L508 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] [2021-07-09 18:36:22,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1684 [2021-07-09 18:36:22,377 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:22,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:22,377 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-07-09 18:36:22,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:22,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986381886] [2021-07-09 18:36:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:22,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:22,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986381886] [2021-07-09 18:36:22,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986381886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:22,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956536257] [2021-07-09 18:36:22,572 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 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 [2021-07-09 18:36:22,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:36:22,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:22,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:36:22,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:23,061 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-07-09 18:36:23,461 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_183, v_prenex_187], 6=[A, v_prenex_185]} [2021-07-09 18:36:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:36:23,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:23,595 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-07-09 18:36:23,596 INFO L628 ElimStorePlain]: treesize reduction 151, result has 44.9 percent of original size [2021-07-09 18:36:23,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:36:23,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:23,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:23,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:36:23,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:23,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:23,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:23,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:23,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:36:23,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:23,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:23,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:36:23,710 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:314, output treesize:31 [2021-07-09 18:36:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:23,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956536257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:23,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:23,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:36:23,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78832323] [2021-07-09 18:36:23,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:36:23,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:23,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:36:23,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:36:23,748 INFO L87 Difference]: Start difference. First operand 1759 states and 5985 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:24,798 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 58 [2021-07-09 18:36:25,052 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 18:36:25,461 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-07-09 18:36:25,636 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 18:36:25,971 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 102 [2021-07-09 18:36:26,123 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 18:36:26,380 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 56 [2021-07-09 18:36:26,682 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-07-09 18:36:27,005 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 169 [2021-07-09 18:36:27,244 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 74 [2021-07-09 18:36:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:27,393 INFO L93 Difference]: Finished difference Result 3623 states and 11573 transitions. [2021-07-09 18:36:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:36:27,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:27,399 INFO L225 Difference]: With dead ends: 3623 [2021-07-09 18:36:27,399 INFO L226 Difference]: Without dead ends: 3587 [2021-07-09 18:36:27,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3626.4ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:36:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3587 states. [2021-07-09 18:36:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3587 to 1939. [2021-07-09 18:36:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.4262125902992775) internal successors, (6640), 1938 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6640 transitions. [2021-07-09 18:36:27,436 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6640 transitions. Word has length 26 [2021-07-09 18:36:27,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:27,436 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 6640 transitions. [2021-07-09 18:36:27,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:27,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6640 transitions. [2021-07-09 18:36:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:27,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:27,439 INFO L508 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] [2021-07-09 18:36:27,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1837,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:27,646 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:27,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:27,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-07-09 18:36:27,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:27,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413372131] [2021-07-09 18:36:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:27,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:27,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413372131] [2021-07-09 18:36:27,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413372131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:27,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278822518] [2021-07-09 18:36:27,871 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 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 [2021-07-09 18:36:27,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:36:27,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:27,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:36:27,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,327 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:36:28,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-09 18:36:28,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,355 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:36:28,355 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 30 treesize of output 32 [2021-07-09 18:36:28,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,373 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:28,373 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 37 treesize of output 1 [2021-07-09 18:36:28,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,397 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:36:28,397 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 35 treesize of output 31 [2021-07-09 18:36:28,398 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,423 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:36:28,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-07-09 18:36:28,426 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:28,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-09 18:36:28,455 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,470 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:28,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:36:28,471 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,485 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:28,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:36:28,486 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,499 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:28,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:36:28,500 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,514 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:28,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:36:28,515 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,530 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:28,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-07-09 18:36:28,531 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,545 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:28,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-07-09 18:36:28,545 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:28,567 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 23 treesize of output 41 [2021-07-09 18:36:28,574 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,588 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:28,589 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 33 treesize of output 1 [2021-07-09 18:36:28,589 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,603 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:28,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-09 18:36:28,604 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:28,612 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:36:28,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:36:28,613 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:28,731 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-07-09 18:36:28,732 INFO L628 ElimStorePlain]: treesize reduction 56, result has 59.1 percent of original size [2021-07-09 18:36:28,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:36:28,734 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:71 [2021-07-09 18:36:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:28,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278822518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:28,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:28,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 18:36:28,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701400278] [2021-07-09 18:36:28,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:36:28,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:28,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:36:28,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:36:28,820 INFO L87 Difference]: Start difference. First operand 1939 states and 6640 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:31,086 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-07-09 18:36:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:31,258 INFO L93 Difference]: Finished difference Result 4085 states and 13117 transitions. [2021-07-09 18:36:31,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:36:31,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:31,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:31,265 INFO L225 Difference]: With dead ends: 4085 [2021-07-09 18:36:31,265 INFO L226 Difference]: Without dead ends: 4028 [2021-07-09 18:36:31,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2200.6ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:36:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4028 states. [2021-07-09 18:36:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4028 to 2033. [2021-07-09 18:36:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.4463582677165356) internal successors, (7003), 2032 states have internal predecessors, (7003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7003 transitions. [2021-07-09 18:36:31,304 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7003 transitions. Word has length 26 [2021-07-09 18:36:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:31,304 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 7003 transitions. [2021-07-09 18:36:31,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7003 transitions. [2021-07-09 18:36:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:31,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:31,307 INFO L508 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] [2021-07-09 18:36:31,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1873,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:31,507 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash 134504147, now seen corresponding path program 27 times [2021-07-09 18:36:31,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:31,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772459205] [2021-07-09 18:36:31,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:31,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:31,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772459205] [2021-07-09 18:36:31,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772459205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:31,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506130238] [2021-07-09 18:36:31,838 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 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 [2021-07-09 18:36:31,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:36:31,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:31,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:36:31,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:32,281 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-09 18:36:32,495 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-07-09 18:36:32,662 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:36:32,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:36:32,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:32,686 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:32,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-07-09 18:36:32,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:33,035 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 127 [2021-07-09 18:36:33,036 INFO L628 ElimStorePlain]: treesize reduction 74, result has 85.2 percent of original size [2021-07-09 18:36:33,057 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:33,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:36:33,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:33,223 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:36:33,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:33,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:33,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:36:33,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:33,258 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:36:33,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:36:33,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:33,420 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-07-09 18:36:33,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:33,440 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:36:33,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:36:33,442 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:33,599 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-09 18:36:33,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:33,621 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:33,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:36:33,624 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:33,772 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-07-09 18:36:33,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:33,791 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:36:33,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 28 [2021-07-09 18:36:33,795 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:33,925 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-09 18:36:33,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:33,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:33,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:36:33,950 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:33,959 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:36:33,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:36:33,960 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:34,183 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2021-07-09 18:36:34,184 INFO L628 ElimStorePlain]: treesize reduction 25, result has 91.7 percent of original size [2021-07-09 18:36:34,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:34,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:36:34,201 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:34,305 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-09 18:36:34,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:34,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:36:34,318 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:563, output treesize:360 [2021-07-09 18:36:34,483 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-07-09 18:36:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:34,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506130238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:34,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:34,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-09 18:36:34,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390846191] [2021-07-09 18:36:34,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:34,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:34,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:34,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:34,537 INFO L87 Difference]: Start difference. First operand 2033 states and 7003 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:35,414 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-07-09 18:36:35,633 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-07-09 18:36:35,869 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-07-09 18:36:36,090 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 18:36:36,301 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-07-09 18:36:36,889 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-07-09 18:36:37,435 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2021-07-09 18:36:37,866 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 108 [2021-07-09 18:36:38,451 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 112 [2021-07-09 18:36:39,166 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 109 [2021-07-09 18:36:39,752 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 90 [2021-07-09 18:36:40,021 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 73 [2021-07-09 18:36:40,983 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 112 [2021-07-09 18:36:41,497 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 76 [2021-07-09 18:36:41,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:41,652 INFO L93 Difference]: Finished difference Result 2749 states and 9119 transitions. [2021-07-09 18:36:41,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:36:41,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:41,657 INFO L225 Difference]: With dead ends: 2749 [2021-07-09 18:36:41,657 INFO L226 Difference]: Without dead ends: 2719 [2021-07-09 18:36:41,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 7193.8ms TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:36:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-07-09 18:36:41,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2036. [2021-07-09 18:36:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 3.444226044226044) internal successors, (7009), 2035 states have internal predecessors, (7009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 7009 transitions. [2021-07-09 18:36:41,685 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 7009 transitions. Word has length 26 [2021-07-09 18:36:41,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:41,685 INFO L482 AbstractCegarLoop]: Abstraction has 2036 states and 7009 transitions. [2021-07-09 18:36:41,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 7009 transitions. [2021-07-09 18:36:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:41,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:41,688 INFO L508 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] [2021-07-09 18:36:41,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1980 [2021-07-09 18:36:41,889 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:41,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1483028633, now seen corresponding path program 28 times [2021-07-09 18:36:41,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:41,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65499066] [2021-07-09 18:36:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:42,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:42,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65499066] [2021-07-09 18:36:42,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65499066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:42,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511292046] [2021-07-09 18:36:42,279 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 [2021-07-09 18:36:42,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:36:42,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:42,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:36:42,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:42,644 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 18:36:42,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:42,738 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:42,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:36:42,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:42,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:42,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:42,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:36:42,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:43,082 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2021-07-09 18:36:43,082 INFO L628 ElimStorePlain]: treesize reduction 69, result has 84.4 percent of original size [2021-07-09 18:36:43,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:43,095 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:43,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:36:43,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:43,241 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:36:43,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:43,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:43,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:43,253 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 16 treesize of output 18 [2021-07-09 18:36:43,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:43,393 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-07-09 18:36:43,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:43,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:43,405 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:43,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:36:43,407 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:43,541 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:36:43,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:43,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:43,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:43,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:36:43,558 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:43,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:43,569 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:36:43,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:36:43,570 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:43,681 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-07-09 18:36:43,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:43,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:43,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:43,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:36:43,708 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:43,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:43,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:43,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:36:43,722 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:43,893 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2021-07-09 18:36:43,894 INFO L628 ElimStorePlain]: treesize reduction 20, result has 91.7 percent of original size [2021-07-09 18:36:43,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:43,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:43,904 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 28 treesize of output 24 [2021-07-09 18:36:43,908 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:43,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:43,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:43,996 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:43,996 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 28 treesize of output 20 [2021-07-09 18:36:43,997 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:44,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:44,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:36:44,075 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:152 [2021-07-09 18:36:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:44,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511292046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:44,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:44,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:36:44,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240335651] [2021-07-09 18:36:44,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:36:44,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:44,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:36:44,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:36:44,206 INFO L87 Difference]: Start difference. First operand 2036 states and 7009 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:44,897 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-09 18:36:45,475 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-09 18:36:45,650 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-09 18:36:45,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:45,972 INFO L93 Difference]: Finished difference Result 2932 states and 9765 transitions. [2021-07-09 18:36:45,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:36:45,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:45,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:45,977 INFO L225 Difference]: With dead ends: 2932 [2021-07-09 18:36:45,977 INFO L226 Difference]: Without dead ends: 2898 [2021-07-09 18:36:45,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2041.8ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:36:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-07-09 18:36:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2045. [2021-07-09 18:36:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.4486301369863015) internal successors, (7049), 2044 states have internal predecessors, (7049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7049 transitions. [2021-07-09 18:36:46,008 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7049 transitions. Word has length 26 [2021-07-09 18:36:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:46,008 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 7049 transitions. [2021-07-09 18:36:46,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7049 transitions. [2021-07-09 18:36:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:46,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:46,011 INFO L508 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] [2021-07-09 18:36:46,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2016,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:46,211 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:46,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:46,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 29 times [2021-07-09 18:36:46,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:46,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212657817] [2021-07-09 18:36:46,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:46,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:46,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212657817] [2021-07-09 18:36:46,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212657817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:46,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896021686] [2021-07-09 18:36:46,531 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 [2021-07-09 18:36:46,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:36:46,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:46,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:36:46,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:46,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:46,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:46,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:36:46,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:46,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:46,985 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:46,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-07-09 18:36:46,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,287 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-07-09 18:36:47,288 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.4 percent of original size [2021-07-09 18:36:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:47,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:36:47,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,316 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:47,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:36:47,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,447 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 18:36:47,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:47,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,460 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:47,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:36:47,461 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:47,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:36:47,472 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,595 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 18:36:47,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:47,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,607 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:47,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:36:47,609 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:47,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:36:47,621 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,734 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-09 18:36:47,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:47,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:47,746 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 28 treesize of output 24 [2021-07-09 18:36:47,750 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:47,759 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:36:47,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:36:47,760 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:47,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:47,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-09 18:36:47,864 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:407, output treesize:176 [2021-07-09 18:36:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:48,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896021686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:48,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:48,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:36:48,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198751627] [2021-07-09 18:36:48,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:36:48,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:48,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:36:48,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:36:48,004 INFO L87 Difference]: Start difference. First operand 2045 states and 7049 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:48,925 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-07-09 18:36:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:49,323 INFO L93 Difference]: Finished difference Result 2657 states and 8964 transitions. [2021-07-09 18:36:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:36:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:49,327 INFO L225 Difference]: With dead ends: 2657 [2021-07-09 18:36:49,327 INFO L226 Difference]: Without dead ends: 2632 [2021-07-09 18:36:49,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1481.9ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:36:49,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-07-09 18:36:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2045. [2021-07-09 18:36:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.4486301369863015) internal successors, (7049), 2044 states have internal predecessors, (7049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7049 transitions. [2021-07-09 18:36:49,354 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7049 transitions. Word has length 26 [2021-07-09 18:36:49,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:49,354 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 7049 transitions. [2021-07-09 18:36:49,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:49,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7049 transitions. [2021-07-09 18:36:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:49,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:49,357 INFO L508 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] [2021-07-09 18:36:49,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2044,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:49,558 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:49,558 INFO L82 PathProgramCache]: Analyzing trace with hash 568891871, now seen corresponding path program 48 times [2021-07-09 18:36:49,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:49,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969571995] [2021-07-09 18:36:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:49,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:49,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969571995] [2021-07-09 18:36:49,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969571995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:49,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663207089] [2021-07-09 18:36:49,907 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 [2021-07-09 18:36:49,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:36:49,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:49,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:36:49,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:50,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-07-09 18:36:50,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-09 18:36:50,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:36:50,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,396 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 36 treesize of output 16 [2021-07-09 18:36:50,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-09 18:36:50,405 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:36:50,412 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:36:50,420 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,428 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 37 treesize of output 13 [2021-07-09 18:36:50,429 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,436 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 30 treesize of output 13 [2021-07-09 18:36:50,437 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-07-09 18:36:50,447 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:36:50,455 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-07-09 18:36:50,462 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-07-09 18:36:50,470 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:36:50,478 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:50,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:36:50,481 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:50,501 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-07-09 18:36:50,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:36:50,502 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:683, output treesize:15 [2021-07-09 18:36:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:50,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663207089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:50,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:50,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:36:50,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035511518] [2021-07-09 18:36:50,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:36:50,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:50,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:36:50,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:36:50,531 INFO L87 Difference]: Start difference. First operand 2045 states and 7049 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:51,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:51,818 INFO L93 Difference]: Finished difference Result 2543 states and 8526 transitions. [2021-07-09 18:36:51,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:36:51,819 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:51,823 INFO L225 Difference]: With dead ends: 2543 [2021-07-09 18:36:51,824 INFO L226 Difference]: Without dead ends: 2521 [2021-07-09 18:36:51,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1369.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:36:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-07-09 18:36:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2041. [2021-07-09 18:36:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4475490196078433) internal successors, (7033), 2040 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7033 transitions. [2021-07-09 18:36:51,854 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7033 transitions. Word has length 26 [2021-07-09 18:36:51,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:51,854 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 7033 transitions. [2021-07-09 18:36:51,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7033 transitions. [2021-07-09 18:36:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:51,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:51,857 INFO L508 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] [2021-07-09 18:36:52,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2080 [2021-07-09 18:36:52,057 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:52,058 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-07-09 18:36:52,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:52,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923284477] [2021-07-09 18:36:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:52,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:52,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923284477] [2021-07-09 18:36:52,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923284477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:52,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952879967] [2021-07-09 18:36:52,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:52,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:36:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:52,745 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_230, v_prenex_232], 5=[v_prenex_228, A]} [2021-07-09 18:36:52,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:52,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:52,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:52,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:52,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 13 [2021-07-09 18:36:52,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:52,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:52,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:52,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:52,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:36:52,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:52,846 INFO L628 ElimStorePlain]: treesize reduction 143, result has 43.7 percent of original size [2021-07-09 18:36:52,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:52,850 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 13 treesize of output 7 [2021-07-09 18:36:52,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:52,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:52,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:52,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:52,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:36:52,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:52,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:52,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:52,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:52,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:36:52,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:36:52,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:52,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:52,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:36:52,934 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:307, output treesize:27 [2021-07-09 18:36:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:52,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952879967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:52,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:52,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:36:52,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934924652] [2021-07-09 18:36:52,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:36:52,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:52,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:36:52,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:36:52,970 INFO L87 Difference]: Start difference. First operand 2041 states and 7033 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:55,139 INFO L93 Difference]: Finished difference Result 2757 states and 9218 transitions. [2021-07-09 18:36:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:36:55,139 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:55,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:55,144 INFO L225 Difference]: With dead ends: 2757 [2021-07-09 18:36:55,144 INFO L226 Difference]: Without dead ends: 2742 [2021-07-09 18:36:55,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2097.3ms TimeCoverageRelationStatistics Valid=496, Invalid=2054, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:36:55,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2021-07-09 18:36:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 2041. [2021-07-09 18:36:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4475490196078433) internal successors, (7033), 2040 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7033 transitions. [2021-07-09 18:36:55,172 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7033 transitions. Word has length 26 [2021-07-09 18:36:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:55,172 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 7033 transitions. [2021-07-09 18:36:55,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:55,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7033 transitions. [2021-07-09 18:36:55,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:55,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:55,174 INFO L508 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] [2021-07-09 18:36:55,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2170,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:55,375 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:55,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:55,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1306035039, now seen corresponding path program 50 times [2021-07-09 18:36:55,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:55,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879543895] [2021-07-09 18:36:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:36:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:55,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:36:55,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879543895] [2021-07-09 18:36:55,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879543895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:55,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993924929] [2021-07-09 18:36:55,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:55,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:36:55,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:36:55,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:36:55,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:36:55,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,824 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:36:55,824 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 30 treesize of output 28 [2021-07-09 18:36:55,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:55,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:55,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-07-09 18:36:55,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:55,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:55,877 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 23 treesize of output 39 [2021-07-09 18:36:55,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:55,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:36:55,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-07-09 18:36:55,913 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:55,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,928 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:55,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:36:55,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:55,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,950 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-07-09 18:36:55,950 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 32 treesize of output 26 [2021-07-09 18:36:55,952 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:55,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,980 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:36:55,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-07-09 18:36:55,981 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:55,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:55,996 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:55,996 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 37 treesize of output 1 [2021-07-09 18:36:55,996 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:56,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,011 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:56,011 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 30 treesize of output 1 [2021-07-09 18:36:56,011 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:56,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,026 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:56,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:36:56,026 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:56,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,041 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:56,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:36:56,041 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,055 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:56,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-09 18:36:56,056 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,070 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:56,070 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 35 treesize of output 1 [2021-07-09 18:36:56,071 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:56,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,092 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-09 18:36:56,092 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 30 treesize of output 24 [2021-07-09 18:36:56,093 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:56,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,113 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:36:56,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-07-09 18:36:56,126 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:36:56,135 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:36:56,135 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 35 treesize of output 1 [2021-07-09 18:36:56,136 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:36:56,204 INFO L628 ElimStorePlain]: treesize reduction 132, result has 34.3 percent of original size [2021-07-09 18:36:56,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:36:56,205 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-07-09 18:36:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:36:56,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993924929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:36:56,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:36:56,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-07-09 18:36:56,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831359625] [2021-07-09 18:36:56,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:36:56,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:36:56,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:36:56,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:36:56,292 INFO L87 Difference]: Start difference. First operand 2041 states and 7033 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:56,927 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-07-09 18:36:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:36:59,700 INFO L93 Difference]: Finished difference Result 3704 states and 11942 transitions. [2021-07-09 18:36:59,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:36:59,701 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:36:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:36:59,706 INFO L225 Difference]: With dead ends: 3704 [2021-07-09 18:36:59,706 INFO L226 Difference]: Without dead ends: 3647 [2021-07-09 18:36:59,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 2991.8ms TimeCoverageRelationStatistics Valid=843, Invalid=3579, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:36:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-07-09 18:36:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 2063. [2021-07-09 18:36:59,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.4393792434529584) internal successors, (7092), 2062 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7092 transitions. [2021-07-09 18:36:59,741 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7092 transitions. Word has length 26 [2021-07-09 18:36:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:36:59,741 INFO L482 AbstractCegarLoop]: Abstraction has 2063 states and 7092 transitions. [2021-07-09 18:36:59,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:36:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7092 transitions. [2021-07-09 18:36:59,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:36:59,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:36:59,743 INFO L508 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] [2021-07-09 18:36:59,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2184,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:36:59,945 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:36:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:36:59,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-07-09 18:36:59,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:36:59,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510390644] [2021-07-09 18:36:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:36:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:00,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:00,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510390644] [2021-07-09 18:37:00,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510390644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:00,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770839733] [2021-07-09 18:37:00,192 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 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 [2021-07-09 18:37:00,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:37:00,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:00,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:37:00,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:00,576 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-07-09 18:37:00,806 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:37:00,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-07-09 18:37:00,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:00,859 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-07-09 18:37:00,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-07-09 18:37:00,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:01,361 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-07-09 18:37:01,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:01,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:01,409 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 35 treesize of output 59 [2021-07-09 18:37:01,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:01,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:01,464 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 35 treesize of output 59 [2021-07-09 18:37:01,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:02,456 WARN L205 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 168 [2021-07-09 18:37:02,456 INFO L628 ElimStorePlain]: treesize reduction 114, result has 87.7 percent of original size [2021-07-09 18:37:02,511 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:37:02,511 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 26 treesize of output 48 [2021-07-09 18:37:02,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:02,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:02,552 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 21 treesize of output 53 [2021-07-09 18:37:02,566 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:03,007 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-07-09 18:37:03,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:03,070 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-09 18:37:03,070 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 33 treesize of output 55 [2021-07-09 18:37:03,078 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:03,126 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:37:03,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-07-09 18:37:03,134 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:04,000 WARN L205 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 151 [2021-07-09 18:37:04,000 INFO L628 ElimStorePlain]: treesize reduction 37, result has 95.3 percent of original size [2021-07-09 18:37:04,052 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:37:04,052 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 31 treesize of output 47 [2021-07-09 18:37:04,056 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:04,097 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:37:04,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-07-09 18:37:04,102 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:04,516 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-07-09 18:37:04,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:04,563 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-07-09 18:37:04,564 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 28 treesize of output 40 [2021-07-09 18:37:04,567 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:04,611 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:37:04,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-07-09 18:37:04,621 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:05,370 WARN L205 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2021-07-09 18:37:05,371 INFO L628 ElimStorePlain]: treesize reduction 45, result has 93.8 percent of original size [2021-07-09 18:37:05,421 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-07-09 18:37:05,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-07-09 18:37:05,424 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:05,471 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-07-09 18:37:05,471 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 33 treesize of output 51 [2021-07-09 18:37:05,476 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:06,193 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 130 [2021-07-09 18:37:06,194 INFO L628 ElimStorePlain]: treesize reduction 24, result has 96.5 percent of original size [2021-07-09 18:37:06,247 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-09 18:37:06,247 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 35 treesize of output 55 [2021-07-09 18:37:06,256 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:06,299 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-07-09 18:37:06,299 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 35 treesize of output 55 [2021-07-09 18:37:06,307 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:07,397 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 141 DAG size of output: 135 [2021-07-09 18:37:07,398 INFO L628 ElimStorePlain]: treesize reduction 50, result has 93.1 percent of original size [2021-07-09 18:37:07,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-07-09 18:37:07,445 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:833, output treesize:1677 [2021-07-09 18:37:07,962 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2021-07-09 18:37:08,207 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-07-09 18:37:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:08,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770839733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:08,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:08,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:37:08,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807209084] [2021-07-09 18:37:08,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:37:08,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:08,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:37:08,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:37:08,338 INFO L87 Difference]: Start difference. First operand 2063 states and 7092 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:08,854 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2021-07-09 18:37:09,146 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-07-09 18:37:09,525 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-07-09 18:37:10,252 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-07-09 18:37:10,534 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-07-09 18:37:10,932 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2021-07-09 18:37:11,363 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-07-09 18:37:11,552 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2021-07-09 18:37:11,708 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 35 [2021-07-09 18:37:12,165 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-07-09 18:37:12,931 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 73 [2021-07-09 18:37:13,133 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2021-07-09 18:37:13,413 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-07-09 18:37:13,824 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 35 [2021-07-09 18:37:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:13,926 INFO L93 Difference]: Finished difference Result 3467 states and 11274 transitions. [2021-07-09 18:37:13,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:37:13,927 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:13,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:13,933 INFO L225 Difference]: With dead ends: 3467 [2021-07-09 18:37:13,933 INFO L226 Difference]: Without dead ends: 3422 [2021-07-09 18:37:13,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 5974.2ms TimeCoverageRelationStatistics Valid=789, Invalid=3633, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:37:13,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-07-09 18:37:13,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2089. [2021-07-09 18:37:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 3.4454022988505746) internal successors, (7194), 2088 states have internal predecessors, (7194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 7194 transitions. [2021-07-09 18:37:13,974 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 7194 transitions. Word has length 26 [2021-07-09 18:37:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:13,974 INFO L482 AbstractCegarLoop]: Abstraction has 2089 states and 7194 transitions. [2021-07-09 18:37:13,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:13,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 7194 transitions. [2021-07-09 18:37:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:13,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:13,977 INFO L508 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] [2021-07-09 18:37:14,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2218 [2021-07-09 18:37:14,178 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:14,179 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-07-09 18:37:14,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:14,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777090125] [2021-07-09 18:37:14,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:14,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777090125] [2021-07-09 18:37:14,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777090125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576686672] [2021-07-09 18:37:14,436 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 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 [2021-07-09 18:37:14,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:14,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:14,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:37:14,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:14,906 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_258], 5=[v_prenex_254, v_prenex_256]} [2021-07-09 18:37:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:14,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:14,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:37:14,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:14,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:14,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:37:14,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:14,989 INFO L628 ElimStorePlain]: treesize reduction 130, result has 39.0 percent of original size [2021-07-09 18:37:14,989 INFO L518 ElimStorePlain]: Eliminatee v_prenex_258 vanished before elimination [2021-07-09 18:37:15,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:15,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:15,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:15,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:37:15,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:15,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:15,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:15,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:37:15,032 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:15,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:15,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:37:15,052 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:31 [2021-07-09 18:37:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:15,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576686672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:15,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:15,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:37:15,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248897889] [2021-07-09 18:37:15,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:15,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:15,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:15,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:15,088 INFO L87 Difference]: Start difference. First operand 2089 states and 7194 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:17,123 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-07-09 18:37:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:17,380 INFO L93 Difference]: Finished difference Result 2641 states and 8863 transitions. [2021-07-09 18:37:17,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:37:17,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:17,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:17,385 INFO L225 Difference]: With dead ends: 2641 [2021-07-09 18:37:17,386 INFO L226 Difference]: Without dead ends: 2626 [2021-07-09 18:37:17,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2146.2ms TimeCoverageRelationStatistics Valid=362, Invalid=1800, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:37:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-07-09 18:37:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2087. [2021-07-09 18:37:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 3.4453499520613615) internal successors, (7187), 2086 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 7187 transitions. [2021-07-09 18:37:17,415 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 7187 transitions. Word has length 26 [2021-07-09 18:37:17,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:17,415 INFO L482 AbstractCegarLoop]: Abstraction has 2087 states and 7187 transitions. [2021-07-09 18:37:17,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:17,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 7187 transitions. [2021-07-09 18:37:17,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:17,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:17,418 INFO L508 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] [2021-07-09 18:37:17,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2345 [2021-07-09 18:37:17,619 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:17,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-07-09 18:37:17,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:17,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518420751] [2021-07-09 18:37:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:17,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:17,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518420751] [2021-07-09 18:37:17,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518420751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:17,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699372375] [2021-07-09 18:37:17,886 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 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 [2021-07-09 18:37:17,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:37:17,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:37:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:18,333 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-07-09 18:37:18,572 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-09 18:37:18,779 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_270, v_prenex_271, v_prenex_273, v_prenex_267, v_prenex_268], 6=[v_prenex_272, v_prenex_269]} [2021-07-09 18:37:18,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:18,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:18,813 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:37:18,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-07-09 18:37:18,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:18,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:18,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:18,845 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:37:18,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:37:18,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:19,565 WARN L205 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 161 [2021-07-09 18:37:19,565 INFO L628 ElimStorePlain]: treesize reduction 31, result has 96.1 percent of original size [2021-07-09 18:37:19,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:19,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:19,601 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:37:19,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-09 18:37:19,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:19,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:19,628 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:37:19,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-09 18:37:19,629 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:19,956 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-07-09 18:37:19,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:19,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:19,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:37:19,996 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:20,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:20,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:20,025 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:37:20,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-09 18:37:20,028 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:20,964 WARN L205 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 142 [2021-07-09 18:37:20,965 INFO L628 ElimStorePlain]: treesize reduction 46, result has 93.5 percent of original size [2021-07-09 18:37:20,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:20,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:21,008 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:37:21,009 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 32 treesize of output 28 [2021-07-09 18:37:21,010 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:21,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:21,039 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:37:21,040 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 37 treesize of output 35 [2021-07-09 18:37:21,042 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:21,329 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-07-09 18:37:21,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:21,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:21,367 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-09 18:37:21,368 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 33 treesize of output 43 [2021-07-09 18:37:21,371 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:21,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:21,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:21,396 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:37:21,397 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 28 treesize of output 30 [2021-07-09 18:37:21,400 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:21,693 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-09 18:37:21,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:21,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:21,726 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:37:21,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-07-09 18:37:21,728 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:21,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:21,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:21,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:21,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-09 18:37:21,757 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:22,234 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 120 [2021-07-09 18:37:22,234 INFO L628 ElimStorePlain]: treesize reduction 35, result has 93.7 percent of original size [2021-07-09 18:37:22,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:22,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:22,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:22,265 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-09 18:37:22,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-07-09 18:37:22,267 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:22,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:22,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:22,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:22,292 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-07-09 18:37:22,292 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 32 treesize of output 34 [2021-07-09 18:37:22,296 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:22,704 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 109 [2021-07-09 18:37:22,704 INFO L628 ElimStorePlain]: treesize reduction 41, result has 91.5 percent of original size [2021-07-09 18:37:22,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:22,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:22,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:22,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:22,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 45 [2021-07-09 18:37:22,739 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:22,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:22,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:22,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:22,760 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-07-09 18:37:22,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-07-09 18:37:22,762 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:22,946 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-07-09 18:37:22,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:22,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-09 18:37:22,960 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:829, output treesize:384 [2021-07-09 18:37:23,168 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2021-07-09 18:37:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:23,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699372375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:23,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:23,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-07-09 18:37:23,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393705921] [2021-07-09 18:37:23,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:37:23,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:23,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:37:23,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:37:23,209 INFO L87 Difference]: Start difference. First operand 2087 states and 7187 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:25,410 WARN L205 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-07-09 18:37:32,487 WARN L205 SmtUtils]: Spent 6.88 s on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-07-09 18:37:33,233 WARN L205 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 170 [2021-07-09 18:37:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:33,866 INFO L93 Difference]: Finished difference Result 3018 states and 10044 transitions. [2021-07-09 18:37:33,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:37:33,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:33,872 INFO L225 Difference]: With dead ends: 3018 [2021-07-09 18:37:33,872 INFO L226 Difference]: Without dead ends: 2988 [2021-07-09 18:37:33,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 10940.3ms TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:37:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-07-09 18:37:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2087. [2021-07-09 18:37:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 3.4453499520613615) internal successors, (7187), 2086 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 7187 transitions. [2021-07-09 18:37:33,904 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 7187 transitions. Word has length 26 [2021-07-09 18:37:33,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:33,904 INFO L482 AbstractCegarLoop]: Abstraction has 2087 states and 7187 transitions. [2021-07-09 18:37:33,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:33,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 7187 transitions. [2021-07-09 18:37:33,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:33,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:33,907 INFO L508 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] [2021-07-09 18:37:34,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2359 [2021-07-09 18:37:34,108 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:34,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1001444339, now seen corresponding path program 54 times [2021-07-09 18:37:34,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:34,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214229180] [2021-07-09 18:37:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:34,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:34,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214229180] [2021-07-09 18:37:34,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214229180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:34,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391258428] [2021-07-09 18:37:34,384 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 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 [2021-07-09 18:37:34,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:37:34,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:34,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:37:34,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:34,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,633 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:37:34,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:37:34,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:34,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-07-09 18:37:34,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:34,692 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 23 treesize of output 39 [2021-07-09 18:37:34,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:34,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-07-09 18:37:34,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,759 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:34,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:37:34,760 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,783 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-07-09 18:37:34,783 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 32 treesize of output 26 [2021-07-09 18:37:34,784 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,809 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:37:34,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-07-09 18:37:34,810 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,826 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:34,826 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 37 treesize of output 1 [2021-07-09 18:37:34,827 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,842 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:34,842 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 30 treesize of output 1 [2021-07-09 18:37:34,843 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,859 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:34,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:37:34,860 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,876 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:34,877 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 37 treesize of output 1 [2021-07-09 18:37:34,877 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,892 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:34,892 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 28 treesize of output 1 [2021-07-09 18:37:34,893 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,908 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:34,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:37:34,909 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,933 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-09 18:37:34,933 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 30 treesize of output 24 [2021-07-09 18:37:34,935 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,958 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:37:34,958 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 30 treesize of output 25 [2021-07-09 18:37:34,959 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:34,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:34,968 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:37:34,968 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 35 treesize of output 1 [2021-07-09 18:37:34,969 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:35,042 INFO L628 ElimStorePlain]: treesize reduction 126, result has 35.4 percent of original size [2021-07-09 18:37:35,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:37:35,043 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-07-09 18:37:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:35,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391258428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:35,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:35,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:37:35,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893726523] [2021-07-09 18:37:35,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:35,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:35,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:35,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:35,134 INFO L87 Difference]: Start difference. First operand 2087 states and 7187 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:37,686 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-07-09 18:37:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:38,210 INFO L93 Difference]: Finished difference Result 3534 states and 11458 transitions. [2021-07-09 18:37:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:37:38,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:38,216 INFO L225 Difference]: With dead ends: 3534 [2021-07-09 18:37:38,216 INFO L226 Difference]: Without dead ends: 3500 [2021-07-09 18:37:38,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 2958.4ms TimeCoverageRelationStatistics Valid=658, Invalid=2534, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:37:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-07-09 18:37:38,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2096. [2021-07-09 18:37:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.4520286396181383) internal successors, (7232), 2095 states have internal predecessors, (7232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7232 transitions. [2021-07-09 18:37:38,254 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7232 transitions. Word has length 26 [2021-07-09 18:37:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:38,254 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 7232 transitions. [2021-07-09 18:37:38,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7232 transitions. [2021-07-09 18:37:38,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:38,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:38,257 INFO L508 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] [2021-07-09 18:37:38,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2428,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:38,473 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:38,473 INFO L82 PathProgramCache]: Analyzing trace with hash -505799277, now seen corresponding path program 30 times [2021-07-09 18:37:38,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:38,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119604839] [2021-07-09 18:37:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:38,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:38,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119604839] [2021-07-09 18:37:38,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119604839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:38,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438631519] [2021-07-09 18:37:38,626 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 [2021-07-09 18:37:38,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:37:38,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:38,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:37:38,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:39,073 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:39,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:37:39,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,095 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:39,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:37:39,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,114 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:39,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:37:39,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,125 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:39,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-09 18:37:39,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:39,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:37:39,145 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,154 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:39,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-09 18:37:39,155 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,175 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:39,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:37:39,178 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,188 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:39,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:39,189 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,198 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:39,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:37:39,199 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,208 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:39,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:37:39,209 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,226 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-09 18:37:39,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 23 [2021-07-09 18:37:39,227 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,236 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:39,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-09 18:37:39,237 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,245 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:39,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-09 18:37:39,246 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,263 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:39,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:37:39,264 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,273 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:37:39,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:37:39,274 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,283 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-07-09 18:37:39,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 19 [2021-07-09 18:37:39,284 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:39,478 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-07-09 18:37:39,479 INFO L628 ElimStorePlain]: treesize reduction 43, result has 79.1 percent of original size [2021-07-09 18:37:39,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 18:37:39,482 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:729, output treesize:157 [2021-07-09 18:37:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:39,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438631519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:39,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:39,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-09 18:37:39,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910492984] [2021-07-09 18:37:39,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:37:39,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:39,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:37:39,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:37:39,627 INFO L87 Difference]: Start difference. First operand 2096 states and 7232 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:40,630 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-07-09 18:37:41,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:41,332 INFO L93 Difference]: Finished difference Result 2796 states and 9280 transitions. [2021-07-09 18:37:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:37:41,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:41,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:41,337 INFO L225 Difference]: With dead ends: 2796 [2021-07-09 18:37:41,337 INFO L226 Difference]: Without dead ends: 2751 [2021-07-09 18:37:41,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1591.2ms TimeCoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:37:41,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-07-09 18:37:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2123. [2021-07-09 18:37:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.4542884071630535) internal successors, (7330), 2122 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7330 transitions. [2021-07-09 18:37:41,366 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7330 transitions. Word has length 26 [2021-07-09 18:37:41,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:41,366 INFO L482 AbstractCegarLoop]: Abstraction has 2123 states and 7330 transitions. [2021-07-09 18:37:41,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:41,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7330 transitions. [2021-07-09 18:37:41,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:41,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:41,369 INFO L508 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] [2021-07-09 18:37:41,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2463 [2021-07-09 18:37:41,569 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:41,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:41,569 INFO L82 PathProgramCache]: Analyzing trace with hash 266862281, now seen corresponding path program 31 times [2021-07-09 18:37:41,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:41,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350805004] [2021-07-09 18:37:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:41,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:41,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350805004] [2021-07-09 18:37:41,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350805004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:41,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373964881] [2021-07-09 18:37:41,849 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 [2021-07-09 18:37:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:41,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:37:41,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:42,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:42,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:37:42,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:42,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-07-09 18:37:42,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,136 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:42,136 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 38 treesize of output 26 [2021-07-09 18:37:42,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:42,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-07-09 18:37:42,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,163 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:42,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:37:42,163 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,173 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:42,174 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 45 treesize of output 25 [2021-07-09 18:37:42,175 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,185 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:42,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 1 [2021-07-09 18:37:42,186 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,196 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:42,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:37:42,197 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,207 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:42,208 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 38 treesize of output 1 [2021-07-09 18:37:42,208 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,217 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:42,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-07-09 18:37:42,218 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,227 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:42,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:37:42,227 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,237 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:42,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-09 18:37:42,238 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,246 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:42,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 23 [2021-07-09 18:37:42,248 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,260 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:42,260 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 23 [2021-07-09 18:37:42,262 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,274 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:42,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2021-07-09 18:37:42,275 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:42,282 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:42,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 1 [2021-07-09 18:37:42,283 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:42,418 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-07-09 18:37:42,418 INFO L628 ElimStorePlain]: treesize reduction 47, result has 69.3 percent of original size [2021-07-09 18:37:42,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:37:42,419 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:821, output treesize:106 [2021-07-09 18:37:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:42,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373964881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:42,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:42,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:37:42,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559280151] [2021-07-09 18:37:42,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:42,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:42,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:42,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:42,503 INFO L87 Difference]: Start difference. First operand 2123 states and 7330 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:43,823 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-07-09 18:37:44,238 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-09 18:37:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:44,410 INFO L93 Difference]: Finished difference Result 2903 states and 9622 transitions. [2021-07-09 18:37:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:37:44,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:44,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:44,415 INFO L225 Difference]: With dead ends: 2903 [2021-07-09 18:37:44,415 INFO L226 Difference]: Without dead ends: 2858 [2021-07-09 18:37:44,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1822.5ms TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:37:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-07-09 18:37:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2119. [2021-07-09 18:37:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.453257790368272) internal successors, (7314), 2118 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7314 transitions. [2021-07-09 18:37:44,446 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7314 transitions. Word has length 26 [2021-07-09 18:37:44,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:44,446 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7314 transitions. [2021-07-09 18:37:44,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7314 transitions. [2021-07-09 18:37:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:44,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:44,449 INFO L508 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] [2021-07-09 18:37:44,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2511 [2021-07-09 18:37:44,649 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:44,650 INFO L82 PathProgramCache]: Analyzing trace with hash -176639705, now seen corresponding path program 32 times [2021-07-09 18:37:44,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:44,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732723016] [2021-07-09 18:37:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:44,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732723016] [2021-07-09 18:37:44,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732723016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489523556] [2021-07-09 18:37:44,813 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 [2021-07-09 18:37:44,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:44,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:44,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:37:44,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:45,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:45,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:45,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:37:45,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:45,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:37:45,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,403 INFO L628 ElimStorePlain]: treesize reduction 117, result has 42.9 percent of original size [2021-07-09 18:37:45,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:45,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:45,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:45,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:45,439 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 23 treesize of output 13 [2021-07-09 18:37:45,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:45,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:45,464 INFO L518 ElimStorePlain]: Eliminatee v_prenex_278 vanished before elimination [2021-07-09 18:37:45,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:37:45,466 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:24 [2021-07-09 18:37:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:45,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489523556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:45,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:45,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:37:45,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983478203] [2021-07-09 18:37:45,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:37:45,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:45,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:37:45,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:37:45,497 INFO L87 Difference]: Start difference. First operand 2119 states and 7314 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:46,509 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-07-09 18:37:46,672 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-07-09 18:37:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:46,760 INFO L93 Difference]: Finished difference Result 2789 states and 9380 transitions. [2021-07-09 18:37:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:37:46,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:46,765 INFO L225 Difference]: With dead ends: 2789 [2021-07-09 18:37:46,765 INFO L226 Difference]: Without dead ends: 2774 [2021-07-09 18:37:46,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1379.6ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:37:46,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2021-07-09 18:37:46,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 2117. [2021-07-09 18:37:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 3.452741020793951) internal successors, (7306), 2116 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 7306 transitions. [2021-07-09 18:37:46,795 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 7306 transitions. Word has length 26 [2021-07-09 18:37:46,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:46,795 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 7306 transitions. [2021-07-09 18:37:46,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 7306 transitions. [2021-07-09 18:37:46,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:46,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:46,798 INFO L508 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] [2021-07-09 18:37:47,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2530 [2021-07-09 18:37:47,001 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash -344448797, now seen corresponding path program 33 times [2021-07-09 18:37:47,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:47,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187718506] [2021-07-09 18:37:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:47,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:47,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187718506] [2021-07-09 18:37:47,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187718506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:47,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296394464] [2021-07-09 18:37:47,160 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 [2021-07-09 18:37:47,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:37:47,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:47,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:37:47,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:47,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,508 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:47,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:47,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:47,520 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 16 treesize of output 18 [2021-07-09 18:37:47,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,532 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:47,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:47,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:47,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:37:47,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,555 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:47,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:47,556 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,564 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:47,564 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 28 treesize of output 16 [2021-07-09 18:37:47,565 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,573 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:47,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:47,573 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,582 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:47,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:47,583 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,594 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:47,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:47,595 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,604 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:47,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:47,605 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,617 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:47,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:37:47,618 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,631 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:47,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:37:47,632 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,645 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:47,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-07-09 18:37:47,646 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,655 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:47,655 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 30 treesize of output 1 [2021-07-09 18:37:47,656 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,663 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:47,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:47,664 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:47,669 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:47,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:47,670 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:47,754 INFO L628 ElimStorePlain]: treesize reduction 44, result has 67.9 percent of original size [2021-07-09 18:37:47,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:37:47,756 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:75 [2021-07-09 18:37:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:47,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296394464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:47,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:47,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:37:47,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154642377] [2021-07-09 18:37:47,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:47,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:47,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:47,847 INFO L87 Difference]: Start difference. First operand 2117 states and 7306 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:48,314 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-07-09 18:37:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:48,921 INFO L93 Difference]: Finished difference Result 2583 states and 8714 transitions. [2021-07-09 18:37:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:37:48,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:48,926 INFO L225 Difference]: With dead ends: 2583 [2021-07-09 18:37:48,926 INFO L226 Difference]: Without dead ends: 2568 [2021-07-09 18:37:48,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 988.2ms TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:37:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-07-09 18:37:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2111. [2021-07-09 18:37:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 3.4526066350710902) internal successors, (7285), 2110 states have internal predecessors, (7285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:48,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 7285 transitions. [2021-07-09 18:37:48,953 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 7285 transitions. Word has length 26 [2021-07-09 18:37:48,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:48,954 INFO L482 AbstractCegarLoop]: Abstraction has 2111 states and 7285 transitions. [2021-07-09 18:37:48,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:48,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 7285 transitions. [2021-07-09 18:37:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:48,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:48,957 INFO L508 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] [2021-07-09 18:37:49,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2550,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:49,172 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash -129711505, now seen corresponding path program 34 times [2021-07-09 18:37:49,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:49,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119093163] [2021-07-09 18:37:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:49,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:49,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119093163] [2021-07-09 18:37:49,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119093163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:49,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629000438] [2021-07-09 18:37:49,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:37:49,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:37:49,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:49,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:37:49,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:49,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:49,957 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:49,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2021-07-09 18:37:49,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:49,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:49,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:49,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:37:49,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:50,346 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2021-07-09 18:37:50,346 INFO L628 ElimStorePlain]: treesize reduction 29, result has 93.3 percent of original size [2021-07-09 18:37:50,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:50,370 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:50,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:37:50,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:50,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:50,395 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:50,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:37:50,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:50,575 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-07-09 18:37:50,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:50,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:50,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:50,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:37:50,602 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:50,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:50,621 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:50,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:37:50,623 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:50,969 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-07-09 18:37:50,969 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.5 percent of original size [2021-07-09 18:37:50,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:50,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:50,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-07-09 18:37:50,994 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:50,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:51,011 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:51,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:37:51,013 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:51,158 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-07-09 18:37:51,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:51,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:51,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:51,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:37:51,196 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:51,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:51,214 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:51,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:37:51,215 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:51,473 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-07-09 18:37:51,474 INFO L628 ElimStorePlain]: treesize reduction 16, result has 94.8 percent of original size [2021-07-09 18:37:51,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-09 18:37:51,489 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:259 [2021-07-09 18:37:51,669 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-07-09 18:37:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:51,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629000438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:51,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:51,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:37:51,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218917923] [2021-07-09 18:37:51,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:37:51,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:51,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:37:51,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:37:51,706 INFO L87 Difference]: Start difference. First operand 2111 states and 7285 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:51,935 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2021-07-09 18:37:52,249 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-07-09 18:37:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:52,705 INFO L93 Difference]: Finished difference Result 2792 states and 9404 transitions. [2021-07-09 18:37:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:37:52,705 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:52,710 INFO L225 Difference]: With dead ends: 2792 [2021-07-09 18:37:52,710 INFO L226 Difference]: Without dead ends: 2767 [2021-07-09 18:37:52,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1325.6ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:37:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2021-07-09 18:37:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2092. [2021-07-09 18:37:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.4490674318507892) internal successors, (7212), 2091 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:52,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 7212 transitions. [2021-07-09 18:37:52,737 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 7212 transitions. Word has length 26 [2021-07-09 18:37:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:52,737 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 7212 transitions. [2021-07-09 18:37:52,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 7212 transitions. [2021-07-09 18:37:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:52,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:52,740 INFO L508 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] [2021-07-09 18:37:52,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2597,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:52,941 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 35 times [2021-07-09 18:37:52,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:52,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292837375] [2021-07-09 18:37:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:53,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:53,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292837375] [2021-07-09 18:37:53,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292837375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:53,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476088126] [2021-07-09 18:37:53,084 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 [2021-07-09 18:37:53,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:37:53,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:53,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:37:53,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:53,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:53,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,474 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 30 treesize of output 16 [2021-07-09 18:37:53,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-07-09 18:37:53,480 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:37:53,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:53,493 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-07-09 18:37:53,499 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:37:53,505 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:53,511 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:37:53,517 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:53,523 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:53,529 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 19 [2021-07-09 18:37:53,534 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-07-09 18:37:53,541 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:53,546 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:53,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:53,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:53,549 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:53,569 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 18:37:53,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:37:53,570 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-07-09 18:37:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:53,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476088126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:53,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:53,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:37:53,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631812929] [2021-07-09 18:37:53,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:53,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:53,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:53,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:53,595 INFO L87 Difference]: Start difference. First operand 2092 states and 7212 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:54,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:54,353 INFO L93 Difference]: Finished difference Result 2658 states and 8951 transitions. [2021-07-09 18:37:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:37:54,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:54,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:54,357 INFO L225 Difference]: With dead ends: 2658 [2021-07-09 18:37:54,358 INFO L226 Difference]: Without dead ends: 2643 [2021-07-09 18:37:54,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 841.2ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:37:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-07-09 18:37:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2095. [2021-07-09 18:37:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 2094 states have (on average 3.451289398280802) internal successors, (7227), 2094 states have internal predecessors, (7227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 7227 transitions. [2021-07-09 18:37:54,386 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 7227 transitions. Word has length 26 [2021-07-09 18:37:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:54,386 INFO L482 AbstractCegarLoop]: Abstraction has 2095 states and 7227 transitions. [2021-07-09 18:37:54,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 7227 transitions. [2021-07-09 18:37:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:54,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:54,389 INFO L508 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] [2021-07-09 18:37:54,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2670,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:54,589 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:54,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:54,589 INFO L82 PathProgramCache]: Analyzing trace with hash 987336491, now seen corresponding path program 36 times [2021-07-09 18:37:54,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:54,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313673118] [2021-07-09 18:37:54,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:54,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:54,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313673118] [2021-07-09 18:37:54,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313673118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:54,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811573247] [2021-07-09 18:37:54,745 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 [2021-07-09 18:37:54,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:37:54,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:54,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:37:54,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:54,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:54,958 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:54,959 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 28 treesize of output 16 [2021-07-09 18:37:54,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:54,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:54,967 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:54,967 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 28 treesize of output 16 [2021-07-09 18:37:54,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:54,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:54,978 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:54,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:54,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:54,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:54,987 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:54,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:54,988 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:54,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:54,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:54,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:37:54,999 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,010 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:55,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:37:55,012 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,022 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:55,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:55,023 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,034 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:37:55,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:37:55,035 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:55,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:37:55,047 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,055 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:55,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:55,056 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,065 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:55,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:37:55,065 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,074 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:55,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:55,074 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,082 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:55,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:37:55,083 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,091 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:55,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:37:55,092 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,099 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:37:55,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:37:55,100 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:55,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:55,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:37:55,109 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:55,179 INFO L628 ElimStorePlain]: treesize reduction 55, result has 55.6 percent of original size [2021-07-09 18:37:55,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:37:55,180 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:569, output treesize:69 [2021-07-09 18:37:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:55,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811573247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:55,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:55,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:37:55,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254045877] [2021-07-09 18:37:55,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:55,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:55,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:55,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:55,273 INFO L87 Difference]: Start difference. First operand 2095 states and 7227 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:56,295 INFO L93 Difference]: Finished difference Result 2926 states and 9825 transitions. [2021-07-09 18:37:56,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:37:56,296 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:56,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:56,300 INFO L225 Difference]: With dead ends: 2926 [2021-07-09 18:37:56,300 INFO L226 Difference]: Without dead ends: 2911 [2021-07-09 18:37:56,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1039.3ms TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:37:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-07-09 18:37:56,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2092. [2021-07-09 18:37:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.4490674318507892) internal successors, (7212), 2091 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 7212 transitions. [2021-07-09 18:37:56,330 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 7212 transitions. Word has length 26 [2021-07-09 18:37:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:56,330 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 7212 transitions. [2021-07-09 18:37:56,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 7212 transitions. [2021-07-09 18:37:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:56,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:56,333 INFO L508 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] [2021-07-09 18:37:56,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:37:56,533 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:56,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:56,534 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 37 times [2021-07-09 18:37:56,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:56,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856352119] [2021-07-09 18:37:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:56,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:56,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856352119] [2021-07-09 18:37:56,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856352119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:56,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471637538] [2021-07-09 18:37:56,647 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 [2021-07-09 18:37:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:56,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:37:56,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:56,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:56,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:56,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:37:56,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:56,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:56,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:56,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-07-09 18:37:56,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,036 INFO L628 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2021-07-09 18:37:57,037 INFO L518 ElimStorePlain]: Eliminatee v_prenex_291 vanished before elimination [2021-07-09 18:37:57,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:57,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:37:57,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:57,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:37:57,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:37:57,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:57,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:57,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:37:57,091 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:31 [2021-07-09 18:37:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:57,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471637538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:57,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:57,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:37:57,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632679850] [2021-07-09 18:37:57,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:57,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:57,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:57,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:57,129 INFO L87 Difference]: Start difference. First operand 2092 states and 7212 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:57,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:37:57,603 INFO L93 Difference]: Finished difference Result 2732 states and 9177 transitions. [2021-07-09 18:37:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:37:57,604 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:37:57,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:37:57,608 INFO L225 Difference]: With dead ends: 2732 [2021-07-09 18:37:57,608 INFO L226 Difference]: Without dead ends: 2702 [2021-07-09 18:37:57,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 590.9ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:37:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2021-07-09 18:37:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 2096. [2021-07-09 18:37:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.452505966587112) internal successors, (7233), 2095 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7233 transitions. [2021-07-09 18:37:57,636 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7233 transitions. Word has length 26 [2021-07-09 18:37:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:37:57,636 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 7233 transitions. [2021-07-09 18:37:57,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:57,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7233 transitions. [2021-07-09 18:37:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:37:57,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:37:57,639 INFO L508 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] [2021-07-09 18:37:57,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2728 [2021-07-09 18:37:57,839 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:37:57,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:37:57,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 38 times [2021-07-09 18:37:57,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:37:57,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164054986] [2021-07-09 18:37:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:37:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:37:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:57,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:37:57,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164054986] [2021-07-09 18:37:57,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164054986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:57,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046859428] [2021-07-09 18:37:57,986 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 [2021-07-09 18:37:58,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:37:58,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:37:58,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:37:58,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:37:58,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:58,483 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:58,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:37:58,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:58,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:58,506 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:58,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:37:58,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:58,645 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-09 18:37:58,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:58,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:58,669 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:58,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:37:58,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:58,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:58,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:58,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:37:58,691 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:58,817 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-09 18:37:58,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:58,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:58,839 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:58,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:37:58,843 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:58,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:58,862 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:37:58,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:37:58,864 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:58,993 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-09 18:37:58,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:58,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,013 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:37:59,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:37:59,014 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:37:59,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:59,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:37:59,032 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:37:59,134 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-07-09 18:37:59,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:37:59,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:37:59,160 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:241 [2021-07-09 18:37:59,343 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-07-09 18:37:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:37:59,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046859428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:37:59,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:37:59,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-09 18:37:59,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754757189] [2021-07-09 18:37:59,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:37:59,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:37:59,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:37:59,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:37:59,386 INFO L87 Difference]: Start difference. First operand 2096 states and 7233 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:37:59,767 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-07-09 18:38:00,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:00,106 INFO L93 Difference]: Finished difference Result 2726 states and 9219 transitions. [2021-07-09 18:38:00,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:38:00,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:00,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:00,110 INFO L225 Difference]: With dead ends: 2726 [2021-07-09 18:38:00,111 INFO L226 Difference]: Without dead ends: 2711 [2021-07-09 18:38:00,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1016.5ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:38:00,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-07-09 18:38:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2120. [2021-07-09 18:38:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.4502123643227938) internal successors, (7311), 2119 states have internal predecessors, (7311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7311 transitions. [2021-07-09 18:38:00,147 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7311 transitions. Word has length 26 [2021-07-09 18:38:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:00,147 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7311 transitions. [2021-07-09 18:38:00,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:00,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7311 transitions. [2021-07-09 18:38:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:00,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:00,150 INFO L508 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] [2021-07-09 18:38:00,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2742 [2021-07-09 18:38:00,350 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:00,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:00,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 39 times [2021-07-09 18:38:00,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:00,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653337377] [2021-07-09 18:38:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:00,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:00,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653337377] [2021-07-09 18:38:00,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653337377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:00,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740005372] [2021-07-09 18:38:00,646 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 [2021-07-09 18:38:00,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:38:00,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:00,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:38:00,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:01,057 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:38:01,292 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_312, v_prenex_313]} [2021-07-09 18:38:01,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:01,296 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 21 treesize of output 13 [2021-07-09 18:38:01,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:01,367 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-07-09 18:38:01,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:01,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:01,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:38:01,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:01,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:01,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:01,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:01,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:38:01,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:01,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:01,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:38:01,420 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:22 [2021-07-09 18:38:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:01,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740005372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:01,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:01,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:38:01,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530590026] [2021-07-09 18:38:01,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:01,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:01,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:01,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:01,458 INFO L87 Difference]: Start difference. First operand 2120 states and 7311 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) [2021-07-09 18:38:02,173 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-09 18:38:02,391 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-07-09 18:38:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:02,552 INFO L93 Difference]: Finished difference Result 2785 states and 9315 transitions. [2021-07-09 18:38:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:38:02,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:02,557 INFO L225 Difference]: With dead ends: 2785 [2021-07-09 18:38:02,557 INFO L226 Difference]: Without dead ends: 2740 [2021-07-09 18:38:02,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1413.8ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:38:02,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-07-09 18:38:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 2156. [2021-07-09 18:38:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.451508120649652) internal successors, (7438), 2155 states have internal predecessors, (7438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7438 transitions. [2021-07-09 18:38:02,585 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7438 transitions. Word has length 26 [2021-07-09 18:38:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:02,585 INFO L482 AbstractCegarLoop]: Abstraction has 2156 states and 7438 transitions. [2021-07-09 18:38:02,585 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) [2021-07-09 18:38:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7438 transitions. [2021-07-09 18:38:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:02,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:02,588 INFO L508 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] [2021-07-09 18:38:02,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2805,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:02,789 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:02,789 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 40 times [2021-07-09 18:38:02,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:02,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496789293] [2021-07-09 18:38:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:03,083 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-07-09 18:38:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:03,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:03,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496789293] [2021-07-09 18:38:03,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496789293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:03,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120455667] [2021-07-09 18:38:03,147 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 [2021-07-09 18:38:03,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:03,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:03,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:38:03,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:03,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:03,374 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 24 treesize of output 24 [2021-07-09 18:38:03,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:03,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-07-09 18:38:03,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,408 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:03,408 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 38 treesize of output 26 [2021-07-09 18:38:03,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:03,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-07-09 18:38:03,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:03,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-07-09 18:38:03,439 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,451 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:03,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-07-09 18:38:03,452 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,463 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:03,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 1 [2021-07-09 18:38:03,464 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,474 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:03,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:38:03,475 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,487 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:03,487 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 38 treesize of output 1 [2021-07-09 18:38:03,487 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,497 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:03,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-07-09 18:38:03,497 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,507 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:03,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-07-09 18:38:03,508 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,517 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:03,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-07-09 18:38:03,518 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,527 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:03,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 23 [2021-07-09 18:38:03,528 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,541 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:03,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 23 [2021-07-09 18:38:03,542 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,554 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:03,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2021-07-09 18:38:03,555 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:03,562 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:03,562 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 43 treesize of output 1 [2021-07-09 18:38:03,563 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:03,685 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-07-09 18:38:03,686 INFO L628 ElimStorePlain]: treesize reduction 47, result has 69.3 percent of original size [2021-07-09 18:38:03,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:38:03,687 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:821, output treesize:106 [2021-07-09 18:38:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:03,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120455667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:03,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:03,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:38:03,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986805227] [2021-07-09 18:38:03,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:03,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:03,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:03,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:03,780 INFO L87 Difference]: Start difference. First operand 2156 states and 7438 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:04,616 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-07-09 18:38:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:04,861 INFO L93 Difference]: Finished difference Result 2977 states and 9961 transitions. [2021-07-09 18:38:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:38:04,861 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:04,867 INFO L225 Difference]: With dead ends: 2977 [2021-07-09 18:38:04,867 INFO L226 Difference]: Without dead ends: 2947 [2021-07-09 18:38:04,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1186.3ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:38:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-07-09 18:38:04,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2143. [2021-07-09 18:38:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.4495798319327733) internal successors, (7389), 2142 states have internal predecessors, (7389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7389 transitions. [2021-07-09 18:38:04,901 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7389 transitions. Word has length 26 [2021-07-09 18:38:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:04,901 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7389 transitions. [2021-07-09 18:38:04,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7389 transitions. [2021-07-09 18:38:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:04,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:04,904 INFO L508 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] [2021-07-09 18:38:05,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2818,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:05,104 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:05,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 41 times [2021-07-09 18:38:05,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:05,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125833350] [2021-07-09 18:38:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:05,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:05,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125833350] [2021-07-09 18:38:05,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125833350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:05,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854162309] [2021-07-09 18:38:05,360 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 [2021-07-09 18:38:05,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:38:05,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:05,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:05,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:05,750 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-07-09 18:38:05,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:05,878 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:05,878 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 28 treesize of output 20 [2021-07-09 18:38:05,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:05,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:05,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:05,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:05,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:06,213 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-07-09 18:38:06,214 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.6 percent of original size [2021-07-09 18:38:06,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:06,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:06,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:38:06,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:06,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:06,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:06,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:38:06,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:06,530 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-07-09 18:38:06,530 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.8 percent of original size [2021-07-09 18:38:06,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:06,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:06,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:38:06,544 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:06,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:06,555 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:06,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:06,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:06,682 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-07-09 18:38:06,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:06,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:06,696 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:06,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:06,698 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:06,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:06,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:06,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-07-09 18:38:06,711 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:06,828 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-07-09 18:38:06,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:06,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:06,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:06,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:38:06,845 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:06,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:06,854 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:06,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:38:06,855 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:06,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:06,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-09 18:38:06,971 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:411, output treesize:176 [2021-07-09 18:38:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:07,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854162309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:07,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:07,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:38:07,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461565398] [2021-07-09 18:38:07,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:38:07,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:07,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:38:07,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:38:07,103 INFO L87 Difference]: Start difference. First operand 2143 states and 7389 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) [2021-07-09 18:38:07,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:07,772 INFO L93 Difference]: Finished difference Result 2746 states and 9264 transitions. [2021-07-09 18:38:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:38:07,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:07,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:07,778 INFO L225 Difference]: With dead ends: 2746 [2021-07-09 18:38:07,778 INFO L226 Difference]: Without dead ends: 2721 [2021-07-09 18:38:07,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1029.8ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:38:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-07-09 18:38:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2147. [2021-07-09 18:38:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.449673811742777) internal successors, (7403), 2146 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7403 transitions. [2021-07-09 18:38:07,811 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7403 transitions. Word has length 26 [2021-07-09 18:38:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:07,811 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7403 transitions. [2021-07-09 18:38:07,811 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) [2021-07-09 18:38:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7403 transitions. [2021-07-09 18:38:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:07,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:07,814 INFO L508 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] [2021-07-09 18:38:08,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2837,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:08,014 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:08,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 42 times [2021-07-09 18:38:08,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:08,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720650102] [2021-07-09 18:38:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:08,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:08,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720650102] [2021-07-09 18:38:08,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720650102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:08,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574305742] [2021-07-09 18:38:08,296 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 [2021-07-09 18:38:08,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:38:08,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:08,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:08,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:08,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:08,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:08,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,543 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:08,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:38:08,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,553 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:08,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:08,554 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,562 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:08,562 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 28 treesize of output 16 [2021-07-09 18:38:08,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,574 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:08,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-07-09 18:38:08,575 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,583 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:08,583 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 28 treesize of output 16 [2021-07-09 18:38:08,585 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,596 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:08,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:08,597 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,607 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:08,607 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 28 treesize of output 1 [2021-07-09 18:38:08,608 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,615 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:08,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:38:08,616 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,627 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:08,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:38:08,629 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,637 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:08,637 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 35 treesize of output 19 [2021-07-09 18:38:08,638 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,648 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:08,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:38:08,648 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,658 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:08,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:38:08,658 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,666 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:08,666 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 28 treesize of output 16 [2021-07-09 18:38:08,667 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:08,677 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 16 treesize of output 18 [2021-07-09 18:38:08,680 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:08,686 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:08,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:38:08,687 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:08,767 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-07-09 18:38:08,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:38:08,768 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-07-09 18:38:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:08,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574305742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:08,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:08,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:38:08,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828637036] [2021-07-09 18:38:08,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:08,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:08,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:08,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:08,857 INFO L87 Difference]: Start difference. First operand 2147 states and 7403 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:09,565 INFO L93 Difference]: Finished difference Result 2702 states and 9149 transitions. [2021-07-09 18:38:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:38:09,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:09,570 INFO L225 Difference]: With dead ends: 2702 [2021-07-09 18:38:09,570 INFO L226 Difference]: Without dead ends: 2687 [2021-07-09 18:38:09,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 834.4ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:38:09,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-07-09 18:38:09,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2153. [2021-07-09 18:38:09,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.451208178438662) internal successors, (7427), 2152 states have internal predecessors, (7427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7427 transitions. [2021-07-09 18:38:09,600 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7427 transitions. Word has length 26 [2021-07-09 18:38:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:09,600 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7427 transitions. [2021-07-09 18:38:09,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7427 transitions. [2021-07-09 18:38:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:09,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:09,603 INFO L508 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] [2021-07-09 18:38:09,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2875 [2021-07-09 18:38:09,804 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:09,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 55 times [2021-07-09 18:38:09,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:09,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613576926] [2021-07-09 18:38:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:09,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:09,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613576926] [2021-07-09 18:38:09,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613576926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:09,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105633073] [2021-07-09 18:38:09,978 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 [2021-07-09 18:38:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:10,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:10,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:10,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:38:10,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:10,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:38:10,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:38:10,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:38:10,486 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:38:10,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:38:10,500 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:38:10,507 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:38:10,521 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:10,528 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:38:10,535 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:10,542 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:10,548 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:10,555 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:10,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:10,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:10,559 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:10,579 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 18:38:10,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:38:10,580 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-09 18:38:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:10,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105633073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:10,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:10,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:38:10,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190933481] [2021-07-09 18:38:10,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:10,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:10,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:10,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:10,603 INFO L87 Difference]: Start difference. First operand 2153 states and 7427 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) 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) [2021-07-09 18:38:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:11,200 INFO L93 Difference]: Finished difference Result 2728 states and 8906 transitions. [2021-07-09 18:38:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:38:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:11,205 INFO L225 Difference]: With dead ends: 2728 [2021-07-09 18:38:11,205 INFO L226 Difference]: Without dead ends: 2691 [2021-07-09 18:38:11,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 631.7ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:38:11,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-07-09 18:38:11,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2175. [2021-07-09 18:38:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.4498620055197793) internal successors, (7500), 2174 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7500 transitions. [2021-07-09 18:38:11,237 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7500 transitions. Word has length 26 [2021-07-09 18:38:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:11,237 INFO L482 AbstractCegarLoop]: Abstraction has 2175 states and 7500 transitions. [2021-07-09 18:38:11,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) 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) [2021-07-09 18:38:11,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7500 transitions. [2021-07-09 18:38:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:11,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:11,240 INFO L508 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] [2021-07-09 18:38:11,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2894 [2021-07-09 18:38:11,441 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:11,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 56 times [2021-07-09 18:38:11,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:11,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215152919] [2021-07-09 18:38:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:11,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:11,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215152919] [2021-07-09 18:38:11,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215152919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:11,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941793266] [2021-07-09 18:38:11,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:11,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:11,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:11,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:11,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:11,935 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_328, v_prenex_324], 5=[A, v_prenex_326]} [2021-07-09 18:38:11,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:11,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:11,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:11,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:11,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 13 [2021-07-09 18:38:11,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:11,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:11,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:11,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:38:11,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:12,022 INFO L628 ElimStorePlain]: treesize reduction 130, result has 40.1 percent of original size [2021-07-09 18:38:12,023 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-07-09 18:38:12,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:12,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:12,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:38:12,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:12,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:12,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:12,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:12,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:12,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:38:12,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:12,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:12,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:38:12,075 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:31 [2021-07-09 18:38:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:12,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941793266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:12,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:12,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:38:12,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943180564] [2021-07-09 18:38:12,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:12,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:12,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:12,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:12,112 INFO L87 Difference]: Start difference. First operand 2175 states and 7500 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) 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) [2021-07-09 18:38:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:13,084 INFO L93 Difference]: Finished difference Result 2675 states and 8982 transitions. [2021-07-09 18:38:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:38:13,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:13,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:13,088 INFO L225 Difference]: With dead ends: 2675 [2021-07-09 18:38:13,088 INFO L226 Difference]: Without dead ends: 2629 [2021-07-09 18:38:13,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 948.4ms TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:38:13,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-07-09 18:38:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 2171. [2021-07-09 18:38:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 3.4442396313364054) internal successors, (7474), 2170 states have internal predecessors, (7474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 7474 transitions. [2021-07-09 18:38:13,126 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 7474 transitions. Word has length 26 [2021-07-09 18:38:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:13,127 INFO L482 AbstractCegarLoop]: Abstraction has 2171 states and 7474 transitions. [2021-07-09 18:38:13,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) 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) [2021-07-09 18:38:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 7474 transitions. [2021-07-09 18:38:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:13,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:13,129 INFO L508 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] [2021-07-09 18:38:13,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2996,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:13,330 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:13,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:13,330 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 57 times [2021-07-09 18:38:13,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:13,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101647819] [2021-07-09 18:38:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:13,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:13,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101647819] [2021-07-09 18:38:13,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101647819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:13,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466074561] [2021-07-09 18:38:13,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:13,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:38:13,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:13,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:38:13,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:13,967 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_333, v_prenex_335], 5=[A, v_prenex_334]} [2021-07-09 18:38:13,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:13,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:13,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:38:13,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:13,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:13,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:13,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:14,073 INFO L628 ElimStorePlain]: treesize reduction 143, result has 42.8 percent of original size [2021-07-09 18:38:14,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:14,076 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 13 treesize of output 7 [2021-07-09 18:38:14,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:14,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:14,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:14,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:14,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:38:14,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:14,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:14,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:14,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:14,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:14,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:14,140 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 25 treesize of output 13 [2021-07-09 18:38:14,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:14,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:14,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:38:14,164 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:303, output treesize:31 [2021-07-09 18:38:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:14,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466074561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:14,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:14,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:38:14,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373351847] [2021-07-09 18:38:14,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:14,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:14,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:14,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:14,204 INFO L87 Difference]: Start difference. First operand 2171 states and 7474 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) 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) [2021-07-09 18:38:14,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:14,842 INFO L93 Difference]: Finished difference Result 2624 states and 8866 transitions. [2021-07-09 18:38:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:38:14,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:14,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:14,847 INFO L225 Difference]: With dead ends: 2624 [2021-07-09 18:38:14,847 INFO L226 Difference]: Without dead ends: 2609 [2021-07-09 18:38:14,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 830.4ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:38:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-07-09 18:38:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2181. [2021-07-09 18:38:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 3.445412844036697) internal successors, (7511), 2180 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 7511 transitions. [2021-07-09 18:38:14,879 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 7511 transitions. Word has length 26 [2021-07-09 18:38:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:14,879 INFO L482 AbstractCegarLoop]: Abstraction has 2181 states and 7511 transitions. [2021-07-09 18:38:14,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) 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) [2021-07-09 18:38:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 7511 transitions. [2021-07-09 18:38:14,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:14,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:14,882 INFO L508 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] [2021-07-09 18:38:15,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3010 [2021-07-09 18:38:15,083 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:15,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:15,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 43 times [2021-07-09 18:38:15,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:15,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473288148] [2021-07-09 18:38:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:15,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:15,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473288148] [2021-07-09 18:38:15,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473288148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:15,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633148254] [2021-07-09 18:38:15,384 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 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 [2021-07-09 18:38:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:15,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:15,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:15,756 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_338], 2=[A, v_prenex_336]} [2021-07-09 18:38:15,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,759 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 21 treesize of output 13 [2021-07-09 18:38:15,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,852 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-07-09 18:38:15,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:38:15,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:15,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:15,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:15,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:15,903 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 23 treesize of output 13 [2021-07-09 18:38:15,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:15,947 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-07-09 18:38:15,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:38:15,949 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-07-09 18:38:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:15,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633148254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:15,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:15,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:38:15,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016395974] [2021-07-09 18:38:15,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:15,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:15,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:15,986 INFO L87 Difference]: Start difference. First operand 2181 states and 7511 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:16,724 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-07-09 18:38:17,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:17,071 INFO L93 Difference]: Finished difference Result 2827 states and 9420 transitions. [2021-07-09 18:38:17,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:38:17,071 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:17,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:17,076 INFO L225 Difference]: With dead ends: 2827 [2021-07-09 18:38:17,076 INFO L226 Difference]: Without dead ends: 2797 [2021-07-09 18:38:17,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1199.6ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:38:17,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-07-09 18:38:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2189. [2021-07-09 18:38:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 3.4437842778793417) internal successors, (7535), 2188 states have internal predecessors, (7535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 7535 transitions. [2021-07-09 18:38:17,107 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 7535 transitions. Word has length 26 [2021-07-09 18:38:17,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:17,107 INFO L482 AbstractCegarLoop]: Abstraction has 2189 states and 7535 transitions. [2021-07-09 18:38:17,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:17,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 7535 transitions. [2021-07-09 18:38:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:17,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:17,110 INFO L508 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] [2021-07-09 18:38:17,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:17,312 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:17,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:17,312 INFO L82 PathProgramCache]: Analyzing trace with hash 352643691, now seen corresponding path program 58 times [2021-07-09 18:38:17,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:17,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138117355] [2021-07-09 18:38:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:17,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:17,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138117355] [2021-07-09 18:38:17,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138117355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:17,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927928055] [2021-07-09 18:38:17,451 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 [2021-07-09 18:38:17,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:17,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:17,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:17,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:17,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,938 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 35 treesize of output 19 [2021-07-09 18:38:17,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:17,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:38:17,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,954 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 37 treesize of output 19 [2021-07-09 18:38:17,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:17,961 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:17,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:17,969 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:17,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,975 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 35 treesize of output 19 [2021-07-09 18:38:17,976 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,983 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 30 treesize of output 16 [2021-07-09 18:38:17,984 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:17,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:38:17,991 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:17,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:17,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:17,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:38:17,999 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:38:18,007 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:38:18,016 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:38:18,024 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:38:18,031 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,038 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 30 treesize of output 16 [2021-07-09 18:38:18,039 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:18,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:18,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:38:18,043 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:18,065 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-07-09 18:38:18,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:38:18,066 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-09 18:38:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:18,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927928055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:18,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:18,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 18:38:18,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496666189] [2021-07-09 18:38:18,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:18,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:18,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:18,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:18,089 INFO L87 Difference]: Start difference. First operand 2189 states and 7535 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:19,121 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-07-09 18:38:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:19,382 INFO L93 Difference]: Finished difference Result 3223 states and 10393 transitions. [2021-07-09 18:38:19,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:38:19,383 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:19,389 INFO L225 Difference]: With dead ends: 3223 [2021-07-09 18:38:19,389 INFO L226 Difference]: Without dead ends: 3186 [2021-07-09 18:38:19,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1106.3ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:38:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-07-09 18:38:19,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2237. [2021-07-09 18:38:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 3.4485688729874777) internal successors, (7711), 2236 states have internal predecessors, (7711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 7711 transitions. [2021-07-09 18:38:19,424 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 7711 transitions. Word has length 26 [2021-07-09 18:38:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:19,424 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 7711 transitions. [2021-07-09 18:38:19,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 7711 transitions. [2021-07-09 18:38:19,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:19,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:19,427 INFO L508 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] [2021-07-09 18:38:19,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3036,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:19,633 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:19,633 INFO L82 PathProgramCache]: Analyzing trace with hash 392132503, now seen corresponding path program 44 times [2021-07-09 18:38:19,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:19,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636895376] [2021-07-09 18:38:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:19,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:19,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636895376] [2021-07-09 18:38:19,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636895376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:19,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231577999] [2021-07-09 18:38:19,917 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 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 [2021-07-09 18:38:19,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:19,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:19,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:19,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:20,375 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-07-09 18:38:20,899 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:20,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 [2021-07-09 18:38:20,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:20,913 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:20,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-07-09 18:38:20,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,273 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 126 [2021-07-09 18:38:21,273 INFO L628 ElimStorePlain]: treesize reduction 74, result has 84.5 percent of original size [2021-07-09 18:38:21,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:21,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-07-09 18:38:21,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,455 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-07-09 18:38:21,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:21,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:21,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:38:21,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,491 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:21,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:38:21,491 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,627 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:38:21,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:21,650 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:21,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:38:21,654 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,789 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-09 18:38:21,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:21,815 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:21,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:38:21,821 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:21,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:21,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:38:21,842 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:22,072 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 107 [2021-07-09 18:38:22,072 INFO L628 ElimStorePlain]: treesize reduction 27, result has 91.1 percent of original size [2021-07-09 18:38:22,105 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:22,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:38:22,107 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:22,219 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-09 18:38:22,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:22,238 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:22,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:38:22,242 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:22,350 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-07-09 18:38:22,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:22,367 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:22,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:22,369 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:22,477 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-07-09 18:38:22,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:22,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:22,492 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:539, output treesize:412 [2021-07-09 18:38:22,677 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-07-09 18:38:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:22,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231577999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:22,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:22,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:38:22,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130801885] [2021-07-09 18:38:22,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:38:22,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:22,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:38:22,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:22,784 INFO L87 Difference]: Start difference. First operand 2237 states and 7711 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:23,868 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-07-09 18:38:24,437 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-07-09 18:38:24,857 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2021-07-09 18:38:25,277 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 96 [2021-07-09 18:38:25,524 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-09 18:38:26,121 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 107 [2021-07-09 18:38:26,627 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2021-07-09 18:38:27,358 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 108 [2021-07-09 18:38:27,572 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-07-09 18:38:28,184 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2021-07-09 18:38:28,383 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-07-09 18:38:28,760 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-07-09 18:38:29,188 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-07-09 18:38:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:29,404 INFO L93 Difference]: Finished difference Result 3399 states and 11009 transitions. [2021-07-09 18:38:29,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:38:29,404 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:29,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:29,410 INFO L225 Difference]: With dead ends: 3399 [2021-07-09 18:38:29,410 INFO L226 Difference]: Without dead ends: 3354 [2021-07-09 18:38:29,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 6443.1ms TimeCoverageRelationStatistics Valid=484, Invalid=2378, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:38:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-07-09 18:38:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 2260. [2021-07-09 18:38:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2259 states have (on average 3.454183266932271) internal successors, (7803), 2259 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 7803 transitions. [2021-07-09 18:38:29,442 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 7803 transitions. Word has length 26 [2021-07-09 18:38:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:29,442 INFO L482 AbstractCegarLoop]: Abstraction has 2260 states and 7803 transitions. [2021-07-09 18:38:29,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:29,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 7803 transitions. [2021-07-09 18:38:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:29,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:29,445 INFO L508 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] [2021-07-09 18:38:29,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3126,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:29,646 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:29,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:29,646 INFO L82 PathProgramCache]: Analyzing trace with hash -658448197, now seen corresponding path program 45 times [2021-07-09 18:38:29,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:29,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918473000] [2021-07-09 18:38:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:29,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:29,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918473000] [2021-07-09 18:38:29,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918473000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:29,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156044153] [2021-07-09 18:38:29,910 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 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 [2021-07-09 18:38:29,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:38:29,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:29,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:29,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:30,207 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-09 18:38:30,380 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-09 18:38:30,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:30,501 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:38:30,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-07-09 18:38:30,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:30,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:30,530 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:30,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 31 [2021-07-09 18:38:30,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:30,936 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 156 [2021-07-09 18:38:30,936 INFO L628 ElimStorePlain]: treesize reduction 74, result has 85.2 percent of original size [2021-07-09 18:38:30,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:30,961 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:30,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 [2021-07-09 18:38:30,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:31,150 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-07-09 18:38:31,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:31,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:31,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:31,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:38:31,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:31,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:31,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:31,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:38:31,204 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:31,516 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 144 [2021-07-09 18:38:31,516 INFO L628 ElimStorePlain]: treesize reduction 49, result has 87.8 percent of original size [2021-07-09 18:38:31,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:31,544 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:31,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:38:31,545 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:31,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:31,570 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:31,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:38:31,571 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:31,823 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2021-07-09 18:38:31,823 INFO L628 ElimStorePlain]: treesize reduction 33, result has 90.0 percent of original size [2021-07-09 18:38:31,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:31,845 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:31,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:38:31,846 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:31,964 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-09 18:38:31,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:31,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:31,987 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:31,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-07-09 18:38:31,991 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:32,102 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-07-09 18:38:32,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:32,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:38:32,125 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:32,235 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-09 18:38:32,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:32,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:32,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-09 18:38:32,262 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:32,468 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 112 [2021-07-09 18:38:32,469 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.4 percent of original size [2021-07-09 18:38:32,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:38:32,486 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:563, output treesize:231 [2021-07-09 18:38:32,606 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-07-09 18:38:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:32,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156044153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:32,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:32,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:38:32,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229603724] [2021-07-09 18:38:32,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:32,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:32,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:32,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:32,647 INFO L87 Difference]: Start difference. First operand 2260 states and 7803 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:32,972 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-07-09 18:38:33,895 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 36 [2021-07-09 18:38:34,432 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-07-09 18:38:34,771 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-07-09 18:38:35,129 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-07-09 18:38:35,501 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 112 [2021-07-09 18:38:35,892 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-07-09 18:38:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:36,142 INFO L93 Difference]: Finished difference Result 3654 states and 11998 transitions. [2021-07-09 18:38:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:38:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:36,149 INFO L225 Difference]: With dead ends: 3654 [2021-07-09 18:38:36,149 INFO L226 Difference]: Without dead ends: 3624 [2021-07-09 18:38:36,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 3622.9ms TimeCoverageRelationStatistics Valid=385, Invalid=1255, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:38:36,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2021-07-09 18:38:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 2265. [2021-07-09 18:38:36,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 3.4487632508833923) internal successors, (7808), 2264 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 7808 transitions. [2021-07-09 18:38:36,186 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 7808 transitions. Word has length 26 [2021-07-09 18:38:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:36,186 INFO L482 AbstractCegarLoop]: Abstraction has 2265 states and 7808 transitions. [2021-07-09 18:38:36,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 7808 transitions. [2021-07-09 18:38:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:36,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:36,189 INFO L508 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] [2021-07-09 18:38:36,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3207 [2021-07-09 18:38:36,389 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:36,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:36,390 INFO L82 PathProgramCache]: Analyzing trace with hash 578637215, now seen corresponding path program 59 times [2021-07-09 18:38:36,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:36,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480312491] [2021-07-09 18:38:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:36,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:36,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480312491] [2021-07-09 18:38:36,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480312491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:36,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50571556] [2021-07-09 18:38:36,529 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 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 [2021-07-09 18:38:36,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:38:36,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:36,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:37,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:37,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:38:37,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:37,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:38:37,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:37,075 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:38:37,082 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:37,089 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:38:37,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:38:37,104 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:38:37,111 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:38:37,118 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:37,125 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-07-09 18:38:37,132 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:38:37,138 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:37,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:37,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:37,142 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:37,160 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-07-09 18:38:37,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:38:37,161 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-09 18:38:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:37,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50571556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:37,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:37,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:38:37,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4559363] [2021-07-09 18:38:37,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:37,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:37,188 INFO L87 Difference]: Start difference. First operand 2265 states and 7808 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:38,250 INFO L93 Difference]: Finished difference Result 3677 states and 11972 transitions. [2021-07-09 18:38:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:38:38,250 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:38,256 INFO L225 Difference]: With dead ends: 3677 [2021-07-09 18:38:38,256 INFO L226 Difference]: Without dead ends: 3647 [2021-07-09 18:38:38,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 941.0ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:38:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-07-09 18:38:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 2319. [2021-07-09 18:38:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 3.4516824849007763) internal successors, (8001), 2318 states have internal predecessors, (8001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 8001 transitions. [2021-07-09 18:38:38,295 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 8001 transitions. Word has length 26 [2021-07-09 18:38:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:38,295 INFO L482 AbstractCegarLoop]: Abstraction has 2319 states and 8001 transitions. [2021-07-09 18:38:38,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 8001 transitions. [2021-07-09 18:38:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:38,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:38,298 INFO L508 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] [2021-07-09 18:38:38,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3250 [2021-07-09 18:38:38,499 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:38,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 60 times [2021-07-09 18:38:38,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:38,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651780577] [2021-07-09 18:38:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:38,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:38,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651780577] [2021-07-09 18:38:38,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651780577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:38,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340399204] [2021-07-09 18:38:38,632 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 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 [2021-07-09 18:38:38,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:38:38,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:38,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:38,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:38,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:38,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:38,876 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:38:38,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:38:38,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:38,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:38,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:38,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:38,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-07-09 18:38:38,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:38,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:38,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:38,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:38,933 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 23 treesize of output 39 [2021-07-09 18:38:38,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:38,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:38,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:38,965 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 37 treesize of output 45 [2021-07-09 18:38:38,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:38,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:38,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:38,991 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:38:38,991 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 37 treesize of output 1 [2021-07-09 18:38:38,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:38,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:38,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,018 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-07-09 18:38:39,018 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 32 treesize of output 26 [2021-07-09 18:38:39,020 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,046 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:38:39,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-07-09 18:38:39,047 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,064 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:38:39,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:38:39,064 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,079 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:38:39,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-07-09 18:38:39,080 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,097 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:38:39,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:38:39,098 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,113 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:38:39,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:38:39,114 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,128 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:38:39,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-07-09 18:38:39,129 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,144 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:38:39,144 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 35 treesize of output 1 [2021-07-09 18:38:39,145 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,167 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-07-09 18:38:39,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:38:39,168 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,190 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:38:39,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-07-09 18:38:39,191 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:39,200 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:38:39,200 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 35 treesize of output 1 [2021-07-09 18:38:39,201 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:39,271 INFO L628 ElimStorePlain]: treesize reduction 132, result has 34.3 percent of original size [2021-07-09 18:38:39,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:38:39,272 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-07-09 18:38:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:39,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340399204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:39,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:39,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 18:38:39,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498264418] [2021-07-09 18:38:39,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:39,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:39,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:39,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:39,359 INFO L87 Difference]: Start difference. First operand 2319 states and 8001 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:41,161 INFO L93 Difference]: Finished difference Result 3983 states and 12879 transitions. [2021-07-09 18:38:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:38:41,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:41,169 INFO L225 Difference]: With dead ends: 3983 [2021-07-09 18:38:41,169 INFO L226 Difference]: Without dead ends: 3939 [2021-07-09 18:38:41,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1632.5ms TimeCoverageRelationStatistics Valid=466, Invalid=1696, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:38:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2021-07-09 18:38:41,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 2319. [2021-07-09 18:38:41,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 3.4490940465918896) internal successors, (7995), 2318 states have internal predecessors, (7995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:41,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 7995 transitions. [2021-07-09 18:38:41,210 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 7995 transitions. Word has length 26 [2021-07-09 18:38:41,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:41,210 INFO L482 AbstractCegarLoop]: Abstraction has 2319 states and 7995 transitions. [2021-07-09 18:38:41,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 7995 transitions. [2021-07-09 18:38:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:41,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:41,213 INFO L508 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] [2021-07-09 18:38:41,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3356,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:41,414 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:41,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:41,414 INFO L82 PathProgramCache]: Analyzing trace with hash 534773347, now seen corresponding path program 46 times [2021-07-09 18:38:41,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:41,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246453740] [2021-07-09 18:38:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:41,674 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-07-09 18:38:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:41,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:41,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246453740] [2021-07-09 18:38:41,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246453740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:41,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762704103] [2021-07-09 18:38:41,802 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 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 [2021-07-09 18:38:41,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:38:41,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:41,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:38:41,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:42,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:42,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-07-09 18:38:42,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,058 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:42,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-07-09 18:38:42,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:42,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:38:42,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,100 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:42,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:42,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,113 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:42,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:42,114 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,128 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:42,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:38:42,130 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,143 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:42,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:38:42,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,156 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:42,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:38:42,157 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,171 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:42,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:38:42,172 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,185 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:42,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:38:42,186 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,198 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:42,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:42,199 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,212 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:42,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-07-09 18:38:42,213 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:42,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-07-09 18:38:42,231 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,243 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:42,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:38:42,244 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,256 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:42,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:42,257 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:42,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:42,264 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:38:42,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-07-09 18:38:42,265 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:42,340 INFO L628 ElimStorePlain]: treesize reduction 57, result has 57.5 percent of original size [2021-07-09 18:38:42,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:38:42,341 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:77 [2021-07-09 18:38:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:42,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762704103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:42,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:42,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:38:42,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98322701] [2021-07-09 18:38:42,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:42,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:42,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:42,432 INFO L87 Difference]: Start difference. First operand 2319 states and 7995 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:43,770 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-07-09 18:38:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:44,217 INFO L93 Difference]: Finished difference Result 3035 states and 10159 transitions. [2021-07-09 18:38:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:38:44,217 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:44,223 INFO L225 Difference]: With dead ends: 3035 [2021-07-09 18:38:44,223 INFO L226 Difference]: Without dead ends: 3005 [2021-07-09 18:38:44,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1771.3ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:38:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-07-09 18:38:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2314. [2021-07-09 18:38:44,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2313 states have (on average 3.4466061392131433) internal successors, (7972), 2313 states have internal predecessors, (7972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 7972 transitions. [2021-07-09 18:38:44,255 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 7972 transitions. Word has length 26 [2021-07-09 18:38:44,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:44,255 INFO L482 AbstractCegarLoop]: Abstraction has 2314 states and 7972 transitions. [2021-07-09 18:38:44,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:44,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 7972 transitions. [2021-07-09 18:38:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:44,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:44,258 INFO L508 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] [2021-07-09 18:38:44,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3390,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:44,458 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:44,459 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 47 times [2021-07-09 18:38:44,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:44,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156452320] [2021-07-09 18:38:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:44,675 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-07-09 18:38:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:44,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:44,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156452320] [2021-07-09 18:38:44,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156452320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:44,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941170572] [2021-07-09 18:38:44,822 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 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 [2021-07-09 18:38:44,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:38:44,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:44,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:45,205 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-07-09 18:38:45,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:45,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:38:45,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:45,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,348 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:45,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:38:45,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:45,647 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-07-09 18:38:45,648 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.6 percent of original size [2021-07-09 18:38:45,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:45,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:38:45,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:45,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,675 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:45,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:38:45,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:45,812 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 18:38:45,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:45,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:45,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:38:45,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,839 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:45,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:38:45,840 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:45,964 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 18:38:45,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:45,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,977 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:45,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:45,979 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:45,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:45,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:45,988 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 16 treesize of output 18 [2021-07-09 18:38:45,991 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:46,103 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-07-09 18:38:46,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:46,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:46,116 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:38:46,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:38:46,117 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:46,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:46,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:46,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:38:46,127 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:46,239 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-07-09 18:38:46,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:46,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-09 18:38:46,244 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:411, output treesize:176 [2021-07-09 18:38:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:46,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941170572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:46,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:46,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:38:46,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564995223] [2021-07-09 18:38:46,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:38:46,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:46,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:38:46,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:38:46,379 INFO L87 Difference]: Start difference. First operand 2314 states and 7972 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:47,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:47,539 INFO L93 Difference]: Finished difference Result 3062 states and 10279 transitions. [2021-07-09 18:38:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:38:47,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:47,545 INFO L225 Difference]: With dead ends: 3062 [2021-07-09 18:38:47,545 INFO L226 Difference]: Without dead ends: 3037 [2021-07-09 18:38:47,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1485.5ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:38:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-07-09 18:38:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2304. [2021-07-09 18:38:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 3.449413808076422) internal successors, (7944), 2303 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 7944 transitions. [2021-07-09 18:38:47,577 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 7944 transitions. Word has length 26 [2021-07-09 18:38:47,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:47,578 INFO L482 AbstractCegarLoop]: Abstraction has 2304 states and 7944 transitions. [2021-07-09 18:38:47,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:47,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 7944 transitions. [2021-07-09 18:38:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:47,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:47,581 INFO L508 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] [2021-07-09 18:38:47,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3412,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:47,781 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 61 times [2021-07-09 18:38:47,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:47,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572240059] [2021-07-09 18:38:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:47,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:47,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572240059] [2021-07-09 18:38:47,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572240059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:47,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860301827] [2021-07-09 18:38:47,967 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 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 [2021-07-09 18:38:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:47,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:47,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-07-09 18:38:48,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-07-09 18:38:48,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:38:48,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:48,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-07-09 18:38:48,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,508 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 39 treesize of output 16 [2021-07-09 18:38:48,509 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-07-09 18:38:48,517 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,524 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 30 treesize of output 16 [2021-07-09 18:38:48,525 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-07-09 18:38:48,533 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:38:48,542 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,549 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 35 treesize of output 19 [2021-07-09 18:38:48,550 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-07-09 18:38:48,559 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:38:48,567 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-07-09 18:38:48,574 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:48,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:48,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-07-09 18:38:48,579 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:48,599 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-07-09 18:38:48,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:38:48,600 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-07-09 18:38:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:48,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860301827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:48,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:48,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:38:48,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939937857] [2021-07-09 18:38:48,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:48,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:48,623 INFO L87 Difference]: Start difference. First operand 2304 states and 7944 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:50,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:50,153 INFO L93 Difference]: Finished difference Result 3206 states and 10682 transitions. [2021-07-09 18:38:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:38:50,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:50,158 INFO L225 Difference]: With dead ends: 3206 [2021-07-09 18:38:50,159 INFO L226 Difference]: Without dead ends: 3169 [2021-07-09 18:38:50,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1396.4ms TimeCoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:38:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-07-09 18:38:50,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 2344. [2021-07-09 18:38:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.452838241570636) internal successors, (8090), 2343 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 8090 transitions. [2021-07-09 18:38:50,191 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 8090 transitions. Word has length 26 [2021-07-09 18:38:50,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:50,192 INFO L482 AbstractCegarLoop]: Abstraction has 2344 states and 8090 transitions. [2021-07-09 18:38:50,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 8090 transitions. [2021-07-09 18:38:50,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:50,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:50,195 INFO L508 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] [2021-07-09 18:38:50,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3448,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:50,395 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:50,396 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 62 times [2021-07-09 18:38:50,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:50,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534164143] [2021-07-09 18:38:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:50,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:50,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534164143] [2021-07-09 18:38:50,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534164143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:50,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640338291] [2021-07-09 18:38:50,575 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 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 [2021-07-09 18:38:50,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:38:50,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:50,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:38:50,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:50,916 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-07-09 18:38:50,965 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_401, v_prenex_403], 5=[A, v_prenex_399]} [2021-07-09 18:38:50,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:50,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:50,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:50,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:38:50,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:51,067 INFO L628 ElimStorePlain]: treesize reduction 133, result has 44.6 percent of original size [2021-07-09 18:38:51,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:51,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:51,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:51,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:38:51,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:51,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:51,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:51,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:51,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:51,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:38:51,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:51,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:51,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:51,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:38:51,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 13 [2021-07-09 18:38:51,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:51,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:51,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:38:51,150 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:274, output treesize:31 [2021-07-09 18:38:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:51,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640338291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:51,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:51,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-07-09 18:38:51,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187542866] [2021-07-09 18:38:51,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:38:51,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:51,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:38:51,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:38:51,189 INFO L87 Difference]: Start difference. First operand 2344 states and 8090 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:38:53,033 INFO L93 Difference]: Finished difference Result 3360 states and 11166 transitions. [2021-07-09 18:38:53,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:38:53,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:38:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:38:53,039 INFO L225 Difference]: With dead ends: 3360 [2021-07-09 18:38:53,039 INFO L226 Difference]: Without dead ends: 3326 [2021-07-09 18:38:53,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1690.9ms TimeCoverageRelationStatistics Valid=528, Invalid=1922, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:38:53,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-07-09 18:38:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2364. [2021-07-09 18:38:53,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 3.446043165467626) internal successors, (8143), 2363 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 8143 transitions. [2021-07-09 18:38:53,073 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 8143 transitions. Word has length 26 [2021-07-09 18:38:53,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:38:53,073 INFO L482 AbstractCegarLoop]: Abstraction has 2364 states and 8143 transitions. [2021-07-09 18:38:53,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:53,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 8143 transitions. [2021-07-09 18:38:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:38:53,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:38:53,076 INFO L508 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] [2021-07-09 18:38:53,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3546 [2021-07-09 18:38:53,277 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:38:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:38:53,277 INFO L82 PathProgramCache]: Analyzing trace with hash 256075815, now seen corresponding path program 48 times [2021-07-09 18:38:53,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:38:53,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273441769] [2021-07-09 18:38:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:38:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:38:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:53,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:38:53,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273441769] [2021-07-09 18:38:53,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273441769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:53,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581007667] [2021-07-09 18:38:53,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:38:53,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:38:53,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:38:53,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:38:53,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:38:54,081 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-07-09 18:38:54,522 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_437, v_prenex_427, A, v_prenex_439, v_prenex_428, v_prenex_431, v_prenex_432, v_prenex_421, v_prenex_423, v_prenex_435], 3=[v_prenex_422, v_prenex_425]} [2021-07-09 18:38:54,553 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:54,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 28 [2021-07-09 18:38:54,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:54,909 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 147 [2021-07-09 18:38:54,910 INFO L628 ElimStorePlain]: treesize reduction 122, result has 76.9 percent of original size [2021-07-09 18:38:54,910 INFO L518 ElimStorePlain]: Eliminatee v_prenex_427 vanished before elimination [2021-07-09 18:38:54,935 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:54,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:38:54,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:55,101 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-07-09 18:38:55,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:55,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:55,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:38:55,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:55,288 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-07-09 18:38:55,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:55,310 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:55,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:38:55,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:55,459 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-07-09 18:38:55,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:55,459 INFO L518 ElimStorePlain]: Eliminatee v_prenex_431 vanished before elimination [2021-07-09 18:38:55,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:55,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:38:55,480 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:55,631 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-07-09 18:38:55,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:55,652 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:55,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 [2021-07-09 18:38:55,654 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:55,803 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-07-09 18:38:55,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:55,826 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:38:55,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:38:55,828 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:55,976 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-09 18:38:55,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:55,996 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:38:55,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:38:55,997 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,142 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-07-09 18:38:56,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:56,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:56,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-07-09 18:38:56,165 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,302 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-07-09 18:38:56,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:56,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:38:56,325 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-07-09 18:38:56,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-07-09 18:38:56,328 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:38:56,477 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-07-09 18:38:56,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:38:56,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-09 18:38:56,493 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:545, output treesize:490 [2021-07-09 18:38:56,713 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-07-09 18:38:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:38:56,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581007667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:38:56,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:38:56,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:38:56,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320846013] [2021-07-09 18:38:56,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:38:56,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:38:56,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:38:56,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:38:56,821 INFO L87 Difference]: Start difference. First operand 2364 states and 8143 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:38:57,445 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-07-09 18:38:58,391 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-07-09 18:38:58,741 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-07-09 18:38:59,075 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-07-09 18:38:59,322 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-07-09 18:38:59,574 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2021-07-09 18:38:59,807 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-09 18:39:00,447 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2021-07-09 18:39:00,715 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2021-07-09 18:39:01,535 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 96 [2021-07-09 18:39:02,084 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-07-09 18:39:02,340 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-07-09 18:39:02,519 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 26 [2021-07-09 18:39:02,695 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2021-07-09 18:39:02,863 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 30 [2021-07-09 18:39:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:03,089 INFO L93 Difference]: Finished difference Result 3432 states and 11237 transitions. [2021-07-09 18:39:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:39:03,089 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:03,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:03,095 INFO L225 Difference]: With dead ends: 3432 [2021-07-09 18:39:03,095 INFO L226 Difference]: Without dead ends: 3387 [2021-07-09 18:39:03,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 6098.2ms TimeCoverageRelationStatistics Valid=402, Invalid=2460, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:39:03,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3387 states. [2021-07-09 18:39:03,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3387 to 2369. [2021-07-09 18:39:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 3.4451013513513513) internal successors, (8158), 2368 states have internal predecessors, (8158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 8158 transitions. [2021-07-09 18:39:03,132 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 8158 transitions. Word has length 26 [2021-07-09 18:39:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:03,132 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 8158 transitions. [2021-07-09 18:39:03,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 8158 transitions. [2021-07-09 18:39:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:03,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:03,135 INFO L508 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] [2021-07-09 18:39:03,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-07-09 18:39:03,337 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:03,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:03,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1128567001, now seen corresponding path program 49 times [2021-07-09 18:39:03,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:03,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258549195] [2021-07-09 18:39:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:03,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258549195] [2021-07-09 18:39:03,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258549195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511078151] [2021-07-09 18:39:03,626 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 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 [2021-07-09 18:39:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:03,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:39:03,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:04,068 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-07-09 18:39:04,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,316 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:39:04,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-07-09 18:39:04,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:04,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,342 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:39:04,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 28 [2021-07-09 18:39:04,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:04,736 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 152 [2021-07-09 18:39:04,737 INFO L628 ElimStorePlain]: treesize reduction 76, result has 84.7 percent of original size [2021-07-09 18:39:04,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,762 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:39:04,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:39:04,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:04,941 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-07-09 18:39:04,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:04,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,967 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:39:04,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:39:04,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:04,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:04,993 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-07-09 18:39:04,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-07-09 18:39:04,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:05,303 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 144 [2021-07-09 18:39:05,304 INFO L628 ElimStorePlain]: treesize reduction 33, result has 91.6 percent of original size [2021-07-09 18:39:05,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:05,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:05,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:39:05,332 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:05,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:05,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:05,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:39:05,354 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:05,622 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 136 [2021-07-09 18:39:05,623 INFO L628 ElimStorePlain]: treesize reduction 49, result has 85.8 percent of original size [2021-07-09 18:39:05,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:05,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:05,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:39:05,646 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:05,863 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2021-07-09 18:39:05,863 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-07-09 18:39:05,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:05,883 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:39:05,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 [2021-07-09 18:39:05,884 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:05,989 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:39:05,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:05,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:06,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-07-09 18:39:06,010 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:06,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:06,128 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-07-09 18:39:06,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:39:06,129 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:06,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:06,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-09 18:39:06,242 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:563, output treesize:231 [2021-07-09 18:39:06,361 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-09 18:39:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:06,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511078151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:06,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:06,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:39:06,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124488734] [2021-07-09 18:39:06,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:06,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:06,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:06,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:06,393 INFO L87 Difference]: Start difference. First operand 2369 states and 8158 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:06,711 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-07-09 18:39:07,310 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-07-09 18:39:07,636 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-07-09 18:39:07,817 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-09 18:39:08,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:08,065 INFO L93 Difference]: Finished difference Result 3462 states and 11530 transitions. [2021-07-09 18:39:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:39:08,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:08,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:08,071 INFO L225 Difference]: With dead ends: 3462 [2021-07-09 18:39:08,071 INFO L226 Difference]: Without dead ends: 3432 [2021-07-09 18:39:08,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1985.4ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:39:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2021-07-09 18:39:08,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 2352. [2021-07-09 18:39:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.441514249255636) internal successors, (8091), 2351 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 8091 transitions. [2021-07-09 18:39:08,106 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 8091 transitions. Word has length 26 [2021-07-09 18:39:08,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:08,107 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 8091 transitions. [2021-07-09 18:39:08,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:08,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 8091 transitions. [2021-07-09 18:39:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:08,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:08,110 INFO L508 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] [2021-07-09 18:39:08,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3598 [2021-07-09 18:39:08,310 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:08,310 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 50 times [2021-07-09 18:39:08,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:08,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193475015] [2021-07-09 18:39:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:08,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:08,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193475015] [2021-07-09 18:39:08,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193475015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:08,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757152328] [2021-07-09 18:39:08,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:39:08,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:08,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:39:08,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:08,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:08,809 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 28 treesize of output 24 [2021-07-09 18:39:08,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,821 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:08,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:39:08,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,829 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:08,829 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 33 treesize of output 19 [2021-07-09 18:39:08,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,839 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:08,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:39:08,839 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,850 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:08,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-07-09 18:39:08,851 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,859 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:08,859 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 28 treesize of output 16 [2021-07-09 18:39:08,861 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,871 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:08,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-07-09 18:39:08,873 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,882 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:08,882 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 28 treesize of output 1 [2021-07-09 18:39:08,883 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,890 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:08,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-07-09 18:39:08,891 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,902 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:08,902 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 28 treesize of output 20 [2021-07-09 18:39:08,903 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,911 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:08,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:39:08,912 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,922 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:08,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:39:08,923 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,931 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:08,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:39:08,932 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,940 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:08,940 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 28 treesize of output 16 [2021-07-09 18:39:08,940 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:08,950 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 16 treesize of output 18 [2021-07-09 18:39:08,953 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:08,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:08,959 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:39:08,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-07-09 18:39:08,959 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:09,030 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-07-09 18:39:09,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:39:09,031 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-07-09 18:39:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:09,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757152328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:09,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:09,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:39:09,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081888592] [2021-07-09 18:39:09,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:39:09,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:09,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:39:09,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:39:09,117 INFO L87 Difference]: Start difference. First operand 2352 states and 8091 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:10,100 INFO L93 Difference]: Finished difference Result 3124 states and 10478 transitions. [2021-07-09 18:39:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:39:10,100 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:10,106 INFO L225 Difference]: With dead ends: 3124 [2021-07-09 18:39:10,106 INFO L226 Difference]: Without dead ends: 3099 [2021-07-09 18:39:10,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 976.8ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:39:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2021-07-09 18:39:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 2339. [2021-07-09 18:39:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.441830624465355) internal successors, (8047), 2338 states have internal predecessors, (8047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 8047 transitions. [2021-07-09 18:39:10,141 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 8047 transitions. Word has length 26 [2021-07-09 18:39:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:10,141 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 8047 transitions. [2021-07-09 18:39:10,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:10,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 8047 transitions. [2021-07-09 18:39:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:10,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:10,144 INFO L508 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] [2021-07-09 18:39:10,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3645,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:10,345 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 51 times [2021-07-09 18:39:10,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:10,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341167619] [2021-07-09 18:39:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:10,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:10,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341167619] [2021-07-09 18:39:10,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341167619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:10,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271756834] [2021-07-09 18:39:10,675 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 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 [2021-07-09 18:39:10,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:39:10,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:10,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:39:10,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:11,033 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-07-09 18:39:11,190 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_481, v_prenex_482, v_prenex_478], 3=[v_prenex_480]} [2021-07-09 18:39:11,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,206 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:11,206 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 28 treesize of output 20 [2021-07-09 18:39:11,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:11,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-07-09 18:39:11,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:11,561 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-07-09 18:39:11,562 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.4 percent of original size [2021-07-09 18:39:11,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,577 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:11,577 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 28 treesize of output 20 [2021-07-09 18:39:11,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:11,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-07-09 18:39:11,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:11,741 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-09 18:39:11,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:39:11,758 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:11,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,769 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:11,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:39:11,770 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:11,900 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-09 18:39:11,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:11,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-07-09 18:39:11,915 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:11,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:11,925 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:39:11,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-07-09 18:39:11,926 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:12,043 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-07-09 18:39:12,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:12,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,056 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:39:12,056 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 25 treesize of output 19 [2021-07-09 18:39:12,058 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:12,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:12,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:12,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-07-09 18:39:12,070 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:12,173 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-07-09 18:39:12,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:12,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-07-09 18:39:12,179 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:421, output treesize:186 [2021-07-09 18:39:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:12,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271756834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:12,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:12,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-09 18:39:12,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331414201] [2021-07-09 18:39:12,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:12,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:12,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:12,325 INFO L87 Difference]: Start difference. First operand 2339 states and 8047 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:13,152 INFO L93 Difference]: Finished difference Result 2991 states and 10107 transitions. [2021-07-09 18:39:13,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:39:13,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:13,158 INFO L225 Difference]: With dead ends: 2991 [2021-07-09 18:39:13,158 INFO L226 Difference]: Without dead ends: 2976 [2021-07-09 18:39:13,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1147.1ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:39:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-07-09 18:39:13,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2333. [2021-07-09 18:39:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2332 states have (on average 3.442967409948542) internal successors, (8029), 2332 states have internal predecessors, (8029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 8029 transitions. [2021-07-09 18:39:13,189 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 8029 transitions. Word has length 26 [2021-07-09 18:39:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:13,189 INFO L482 AbstractCegarLoop]: Abstraction has 2333 states and 8029 transitions. [2021-07-09 18:39:13,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:13,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 8029 transitions. [2021-07-09 18:39:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:13,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:13,192 INFO L508 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] [2021-07-09 18:39:13,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3664,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:13,393 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash 118535907, now seen corresponding path program 63 times [2021-07-09 18:39:13,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:13,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731495835] [2021-07-09 18:39:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:13,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:13,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731495835] [2021-07-09 18:39:13,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731495835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:13,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751893037] [2021-07-09 18:39:13,551 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 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 [2021-07-09 18:39:13,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:39:13,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:13,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:39:13,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:14,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,056 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:39:14,056 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 37 treesize of output 35 [2021-07-09 18:39:14,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,084 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:39:14,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:39:14,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,104 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:14,104 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 35 treesize of output 1 [2021-07-09 18:39:14,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,127 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-07-09 18:39:14,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-07-09 18:39:14,128 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,151 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:39:14,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-07-09 18:39:14,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,169 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:14,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:39:14,169 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,185 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:14,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-07-09 18:39:14,185 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,201 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:14,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:39:14,202 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,225 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:39:14,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-09 18:39:14,226 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,249 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:39:14,249 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 28 treesize of output 26 [2021-07-09 18:39:14,251 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,274 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-07-09 18:39:14,274 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 30 treesize of output 25 [2021-07-09 18:39:14,275 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,297 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-07-09 18:39:14,298 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 28 treesize of output 23 [2021-07-09 18:39:14,299 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:14,321 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 23 treesize of output 41 [2021-07-09 18:39:14,327 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,342 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:14,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:39:14,343 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,357 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:14,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:39:14,357 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:14,365 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:14,366 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 30 treesize of output 1 [2021-07-09 18:39:14,366 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:14,454 INFO L628 ElimStorePlain]: treesize reduction 105, result has 47.0 percent of original size [2021-07-09 18:39:14,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:39:14,456 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-07-09 18:39:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:14,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751893037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:14,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:14,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:39:14,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409139790] [2021-07-09 18:39:14,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:39:14,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:14,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:39:14,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:14,533 INFO L87 Difference]: Start difference. First operand 2333 states and 8029 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:16,268 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-07-09 18:39:16,957 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-07-09 18:39:17,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:17,064 INFO L93 Difference]: Finished difference Result 3591 states and 11838 transitions. [2021-07-09 18:39:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:39:17,064 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:17,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:17,070 INFO L225 Difference]: With dead ends: 3591 [2021-07-09 18:39:17,071 INFO L226 Difference]: Without dead ends: 3547 [2021-07-09 18:39:17,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2226.9ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:39:17,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2021-07-09 18:39:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 2360. [2021-07-09 18:39:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.4412886816447648) internal successors, (8118), 2359 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 8118 transitions. [2021-07-09 18:39:17,107 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 8118 transitions. Word has length 26 [2021-07-09 18:39:17,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:17,107 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 8118 transitions. [2021-07-09 18:39:17,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:17,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 8118 transitions. [2021-07-09 18:39:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:17,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:17,110 INFO L508 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] [2021-07-09 18:39:17,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3701,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:17,311 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1466803217, now seen corresponding path program 64 times [2021-07-09 18:39:17,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:17,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257381518] [2021-07-09 18:39:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:17,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:17,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257381518] [2021-07-09 18:39:17,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257381518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:17,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169031341] [2021-07-09 18:39:17,608 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 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 [2021-07-09 18:39:17,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:17,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:17,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:39:17,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:17,979 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-07-09 18:39:18,062 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_486], 5=[v_prenex_487, v_prenex_488]} [2021-07-09 18:39:18,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:18,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:18,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:18,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:18,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-07-09 18:39:18,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:18,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:18,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:18,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:18,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 13 [2021-07-09 18:39:18,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:18,162 INFO L628 ElimStorePlain]: treesize reduction 130, result has 41.2 percent of original size [2021-07-09 18:39:18,162 INFO L518 ElimStorePlain]: Eliminatee v_prenex_486 vanished before elimination [2021-07-09 18:39:18,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:18,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:18,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-09 18:39:18,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:18,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:18,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:18,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:18,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:39:18,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-09 18:39:18,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:18,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:18,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:39:18,221 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:274, output treesize:24 [2021-07-09 18:39:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:18,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169031341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:18,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:18,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-09 18:39:18,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68779907] [2021-07-09 18:39:18,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:39:18,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:18,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:39:18,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:39:18,264 INFO L87 Difference]: Start difference. First operand 2360 states and 8118 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:19,897 INFO L93 Difference]: Finished difference Result 3132 states and 10494 transitions. [2021-07-09 18:39:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:39:19,898 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:19,904 INFO L225 Difference]: With dead ends: 3132 [2021-07-09 18:39:19,904 INFO L226 Difference]: Without dead ends: 3117 [2021-07-09 18:39:19,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1375.8ms TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:39:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-07-09 18:39:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2360. [2021-07-09 18:39:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.4412886816447648) internal successors, (8118), 2359 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 8118 transitions. [2021-07-09 18:39:19,942 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 8118 transitions. Word has length 26 [2021-07-09 18:39:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:19,942 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 8118 transitions. [2021-07-09 18:39:19,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 8118 transitions. [2021-07-09 18:39:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:39:19,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:19,945 INFO L508 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] [2021-07-09 18:39:20,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3815 [2021-07-09 18:39:20,146 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1440707985, now seen corresponding path program 65 times [2021-07-09 18:39:20,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:20,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529363538] [2021-07-09 18:39:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:20,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:20,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529363538] [2021-07-09 18:39:20,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529363538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:20,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638120120] [2021-07-09 18:39:20,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:39:20,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:39:20,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:20,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:39:20,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:20,816 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-09 18:39:21,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,235 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:39:21,235 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 28 treesize of output 30 [2021-07-09 18:39:21,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,291 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-09 18:39:21,291 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 33 treesize of output 43 [2021-07-09 18:39:21,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,763 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-07-09 18:39:21,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:21,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:21,804 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 23 treesize of output 41 [2021-07-09 18:39:21,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:21,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:21,845 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:39:21,845 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 28 treesize of output 26 [2021-07-09 18:39:21,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:22,282 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 18:39:22,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:22,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:22,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:22,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:22,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-07-09 18:39:22,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:22,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:22,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:22,363 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:39:22,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-07-09 18:39:22,364 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:22,770 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-07-09 18:39:22,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:22,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:22,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:22,808 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:39:22,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-07-09 18:39:22,810 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:22,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:22,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:22,843 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:39:22,843 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 35 treesize of output 35 [2021-07-09 18:39:22,848 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:23,543 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 142 [2021-07-09 18:39:23,543 INFO L628 ElimStorePlain]: treesize reduction 31, result has 95.0 percent of original size [2021-07-09 18:39:23,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:23,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:23,578 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:39:23,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-07-09 18:39:23,580 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:23,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:23,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:23,613 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:39:23,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-07-09 18:39:23,615 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:23,936 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-07-09 18:39:23,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:23,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:23,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:23,972 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-07-09 18:39:23,972 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 30 treesize of output 28 [2021-07-09 18:39:23,974 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:23,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:23,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:24,005 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:39:24,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:39:24,009 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:24,581 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2021-07-09 18:39:24,582 INFO L628 ElimStorePlain]: treesize reduction 33, result has 93.4 percent of original size [2021-07-09 18:39:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:24,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:24,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:24,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:39:24,624 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:24,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:24,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:24,654 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:39:24,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-07-09 18:39:24,658 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:25,383 WARN L205 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 111 [2021-07-09 18:39:25,383 INFO L628 ElimStorePlain]: treesize reduction 40, result has 91.2 percent of original size [2021-07-09 18:39:25,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:25,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:25,415 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-07-09 18:39:25,415 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 32 treesize of output 26 [2021-07-09 18:39:25,417 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:25,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:25,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:39:25,445 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:39:25,445 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 37 treesize of output 35 [2021-07-09 18:39:25,448 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 18:39:25,671 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-07-09 18:39:25,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:39:25,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-07-09 18:39:25,691 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:422 [2021-07-09 18:39:25,835 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2021-07-09 18:39:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:25,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638120120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:25,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:25,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-09 18:39:25,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120278177] [2021-07-09 18:39:25,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:39:25,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:25,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:39:25,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:39:25,933 INFO L87 Difference]: Start difference. First operand 2360 states and 8118 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:26,306 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-07-09 18:39:26,785 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-07-09 18:39:26,984 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-07-09 18:39:28,298 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2021-07-09 18:39:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:28,730 INFO L93 Difference]: Finished difference Result 3258 states and 10844 transitions. [2021-07-09 18:39:28,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:39:28,731 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:39:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:28,736 INFO L225 Difference]: With dead ends: 3258 [2021-07-09 18:39:28,736 INFO L226 Difference]: Without dead ends: 3228 [2021-07-09 18:39:28,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 3095.7ms TimeCoverageRelationStatistics Valid=299, Invalid=1261, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:39:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-07-09 18:39:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2352. [2021-07-09 18:39:28,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.442364951084645) internal successors, (8093), 2351 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 8093 transitions. [2021-07-09 18:39:28,767 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 8093 transitions. Word has length 26 [2021-07-09 18:39:28,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:28,767 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 8093 transitions. [2021-07-09 18:39:28,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:28,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 8093 transitions. [2021-07-09 18:39:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:28,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:28,770 INFO L508 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] [2021-07-09 18:39:28,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3830,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:28,972 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:28,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:28,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 52 times [2021-07-09 18:39:28,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:28,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516285735] [2021-07-09 18:39:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:29,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:29,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516285735] [2021-07-09 18:39:29,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516285735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:29,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023348090] [2021-07-09 18:39:29,013 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 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 [2021-07-09 18:39:29,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:29,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:29,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:29,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:29,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023348090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:29,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:29,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:39:29,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738494555] [2021-07-09 18:39:29,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:39:29,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:29,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:39:29,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:39:29,139 INFO L87 Difference]: Start difference. First operand 2352 states and 8093 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) [2021-07-09 18:39:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:29,985 INFO L93 Difference]: Finished difference Result 5410 states and 16973 transitions. [2021-07-09 18:39:29,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:39:29,985 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 [2021-07-09 18:39:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:29,994 INFO L225 Difference]: With dead ends: 5410 [2021-07-09 18:39:29,994 INFO L226 Difference]: Without dead ends: 5410 [2021-07-09 18:39:29,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 519.5ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:39:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2021-07-09 18:39:30,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 2548. [2021-07-09 18:39:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2547 states have (on average 3.486062033765214) internal successors, (8879), 2547 states have internal predecessors, (8879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 8879 transitions. [2021-07-09 18:39:30,046 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 8879 transitions. Word has length 28 [2021-07-09 18:39:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:30,046 INFO L482 AbstractCegarLoop]: Abstraction has 2548 states and 8879 transitions. [2021-07-09 18:39:30,046 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) [2021-07-09 18:39:30,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 8879 transitions. [2021-07-09 18:39:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:30,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:30,050 INFO L508 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] [2021-07-09 18:39:30,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3901,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:30,250 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:30,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:30,250 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 53 times [2021-07-09 18:39:30,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:30,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148528761] [2021-07-09 18:39:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:30,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:30,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148528761] [2021-07-09 18:39:30,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148528761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:30,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484114926] [2021-07-09 18:39:30,290 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 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 [2021-07-09 18:39:30,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:39:30,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:30,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:30,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:30,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484114926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:30,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:30,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:39:30,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526055121] [2021-07-09 18:39:30,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:39:30,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:30,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:39:30,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:39:30,433 INFO L87 Difference]: Start difference. First operand 2548 states and 8879 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) [2021-07-09 18:39:31,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:31,675 INFO L93 Difference]: Finished difference Result 7046 states and 21713 transitions. [2021-07-09 18:39:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:39:31,675 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 [2021-07-09 18:39:31,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:31,687 INFO L225 Difference]: With dead ends: 7046 [2021-07-09 18:39:31,687 INFO L226 Difference]: Without dead ends: 7046 [2021-07-09 18:39:31,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:39:31,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2021-07-09 18:39:31,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 2559. [2021-07-09 18:39:31,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2558 states have (on average 3.492181391712275) internal successors, (8933), 2558 states have internal predecessors, (8933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 8933 transitions. [2021-07-09 18:39:31,760 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 8933 transitions. Word has length 28 [2021-07-09 18:39:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:31,761 INFO L482 AbstractCegarLoop]: Abstraction has 2559 states and 8933 transitions. [2021-07-09 18:39:31,761 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) [2021-07-09 18:39:31,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 8933 transitions. [2021-07-09 18:39:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:31,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:31,764 INFO L508 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] [2021-07-09 18:39:31,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3902 [2021-07-09 18:39:31,966 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:31,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:31,966 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 54 times [2021-07-09 18:39:31,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:31,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273187963] [2021-07-09 18:39:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:32,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:32,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273187963] [2021-07-09 18:39:32,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273187963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:32,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214744104] [2021-07-09 18:39:32,006 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 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 [2021-07-09 18:39:32,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:39:32,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:32,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:32,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:32,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214744104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:32,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:32,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:39:32,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493751534] [2021-07-09 18:39:32,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:39:32,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:39:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:39:32,130 INFO L87 Difference]: Start difference. First operand 2559 states and 8933 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) [2021-07-09 18:39:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:33,328 INFO L93 Difference]: Finished difference Result 6437 states and 20239 transitions. [2021-07-09 18:39:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:39:33,328 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 [2021-07-09 18:39:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:33,338 INFO L225 Difference]: With dead ends: 6437 [2021-07-09 18:39:33,338 INFO L226 Difference]: Without dead ends: 6437 [2021-07-09 18:39:33,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 717.5ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:39:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6437 states. [2021-07-09 18:39:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6437 to 2507. [2021-07-09 18:39:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2506 states have (on average 3.4720670391061454) internal successors, (8701), 2506 states have internal predecessors, (8701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 8701 transitions. [2021-07-09 18:39:33,393 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 8701 transitions. Word has length 28 [2021-07-09 18:39:33,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:33,393 INFO L482 AbstractCegarLoop]: Abstraction has 2507 states and 8701 transitions. [2021-07-09 18:39:33,393 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) [2021-07-09 18:39:33,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 8701 transitions. [2021-07-09 18:39:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:33,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:33,396 INFO L508 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] [2021-07-09 18:39:33,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3903 [2021-07-09 18:39:33,597 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:33,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 55 times [2021-07-09 18:39:33,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:33,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706858683] [2021-07-09 18:39:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:33,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:33,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706858683] [2021-07-09 18:39:33,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706858683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:33,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375762237] [2021-07-09 18:39:33,642 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 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 [2021-07-09 18:39:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:33,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:33,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:33,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375762237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:33,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:33,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:39:33,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829509462] [2021-07-09 18:39:33,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:39:33,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:33,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:39:33,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:39:33,772 INFO L87 Difference]: Start difference. First operand 2507 states and 8701 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) [2021-07-09 18:39:34,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:34,874 INFO L93 Difference]: Finished difference Result 5496 states and 17140 transitions. [2021-07-09 18:39:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:39:34,875 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 [2021-07-09 18:39:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:34,884 INFO L225 Difference]: With dead ends: 5496 [2021-07-09 18:39:34,884 INFO L226 Difference]: Without dead ends: 5496 [2021-07-09 18:39:34,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 647.8ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:39:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-07-09 18:39:34,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 2522. [2021-07-09 18:39:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 3.4668782229274098) internal successors, (8740), 2521 states have internal predecessors, (8740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 8740 transitions. [2021-07-09 18:39:34,931 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 8740 transitions. Word has length 28 [2021-07-09 18:39:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:34,931 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 8740 transitions. [2021-07-09 18:39:34,931 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) [2021-07-09 18:39:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 8740 transitions. [2021-07-09 18:39:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:34,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:34,935 INFO L508 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] [2021-07-09 18:39:35,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3904,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:35,135 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:35,135 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 66 times [2021-07-09 18:39:35,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:35,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637660703] [2021-07-09 18:39:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:35,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:35,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637660703] [2021-07-09 18:39:35,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637660703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:35,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571598922] [2021-07-09 18:39:35,176 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 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 [2021-07-09 18:39:35,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:39:35,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:35,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:35,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571598922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:35,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:35,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:39:35,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366053253] [2021-07-09 18:39:35,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:35,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:35,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:35,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:35,288 INFO L87 Difference]: Start difference. First operand 2522 states and 8740 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) [2021-07-09 18:39:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:35,863 INFO L93 Difference]: Finished difference Result 4908 states and 15515 transitions. [2021-07-09 18:39:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:39:35,863 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 [2021-07-09 18:39:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:35,871 INFO L225 Difference]: With dead ends: 4908 [2021-07-09 18:39:35,871 INFO L226 Difference]: Without dead ends: 4908 [2021-07-09 18:39:35,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:39:35,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4908 states. [2021-07-09 18:39:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4908 to 2592. [2021-07-09 18:39:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 3.4515631030490157) internal successors, (8943), 2591 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 8943 transitions. [2021-07-09 18:39:35,919 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 8943 transitions. Word has length 28 [2021-07-09 18:39:35,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:35,919 INFO L482 AbstractCegarLoop]: Abstraction has 2592 states and 8943 transitions. [2021-07-09 18:39:35,919 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) [2021-07-09 18:39:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 8943 transitions. [2021-07-09 18:39:35,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:35,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:35,922 INFO L508 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] [2021-07-09 18:39:36,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3905 [2021-07-09 18:39:36,123 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:36,123 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 56 times [2021-07-09 18:39:36,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:36,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131097015] [2021-07-09 18:39:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:36,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:36,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131097015] [2021-07-09 18:39:36,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131097015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:36,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747576498] [2021-07-09 18:39:36,165 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 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 [2021-07-09 18:39:36,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:36,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:36,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:36,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:36,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747576498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:36,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:36,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:39:36,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064516657] [2021-07-09 18:39:36,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:39:36,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:36,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:39:36,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:39:36,249 INFO L87 Difference]: Start difference. First operand 2592 states and 8943 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) [2021-07-09 18:39:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:36,424 INFO L93 Difference]: Finished difference Result 4133 states and 13562 transitions. [2021-07-09 18:39:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:39:36,424 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 [2021-07-09 18:39:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:36,430 INFO L225 Difference]: With dead ends: 4133 [2021-07-09 18:39:36,430 INFO L226 Difference]: Without dead ends: 4085 [2021-07-09 18:39:36,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:39:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-07-09 18:39:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 2922. [2021-07-09 18:39:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.501198219787744) internal successors, (10227), 2921 states have internal predecessors, (10227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10227 transitions. [2021-07-09 18:39:36,472 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10227 transitions. Word has length 28 [2021-07-09 18:39:36,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:36,472 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10227 transitions. [2021-07-09 18:39:36,472 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) [2021-07-09 18:39:36,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10227 transitions. [2021-07-09 18:39:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:36,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:36,476 INFO L508 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] [2021-07-09 18:39:36,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3906,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:36,676 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:36,676 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 57 times [2021-07-09 18:39:36,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:36,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597059596] [2021-07-09 18:39:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:36,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:36,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597059596] [2021-07-09 18:39:36,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597059596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:36,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424578029] [2021-07-09 18:39:36,709 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 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 [2021-07-09 18:39:36,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:39:36,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:36,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:36,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:36,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424578029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:36,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:36,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:39:36,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884948989] [2021-07-09 18:39:36,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:39:36,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:36,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:39:36,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:39:36,809 INFO L87 Difference]: Start difference. First operand 2922 states and 10227 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) [2021-07-09 18:39:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:37,396 INFO L93 Difference]: Finished difference Result 4714 states and 15191 transitions. [2021-07-09 18:39:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:39:37,397 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 [2021-07-09 18:39:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:37,405 INFO L225 Difference]: With dead ends: 4714 [2021-07-09 18:39:37,405 INFO L226 Difference]: Without dead ends: 4667 [2021-07-09 18:39:37,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 339.2ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:39:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-07-09 18:39:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 3096. [2021-07-09 18:39:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 3.5150242326332797) internal successors, (10879), 3095 states have internal predecessors, (10879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 10879 transitions. [2021-07-09 18:39:37,475 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 10879 transitions. Word has length 28 [2021-07-09 18:39:37,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:37,475 INFO L482 AbstractCegarLoop]: Abstraction has 3096 states and 10879 transitions. [2021-07-09 18:39:37,475 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) [2021-07-09 18:39:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 10879 transitions. [2021-07-09 18:39:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:37,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:37,480 INFO L508 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] [2021-07-09 18:39:37,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3907 [2021-07-09 18:39:37,681 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:37,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 58 times [2021-07-09 18:39:37,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:37,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439201996] [2021-07-09 18:39:37,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:37,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:37,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439201996] [2021-07-09 18:39:37,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439201996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:37,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273551372] [2021-07-09 18:39:37,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:37,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:37,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:37,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273551372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:37,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:37,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:39:37,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415648228] [2021-07-09 18:39:37,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:37,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:37,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:37,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:37,825 INFO L87 Difference]: Start difference. First operand 3096 states and 10879 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) [2021-07-09 18:39:38,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:38,498 INFO L93 Difference]: Finished difference Result 5031 states and 15895 transitions. [2021-07-09 18:39:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:39:38,498 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 [2021-07-09 18:39:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:38,507 INFO L225 Difference]: With dead ends: 5031 [2021-07-09 18:39:38,507 INFO L226 Difference]: Without dead ends: 5005 [2021-07-09 18:39:38,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:39:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2021-07-09 18:39:38,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 3120. [2021-07-09 18:39:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3119 states have (on average 3.521000320615582) internal successors, (10982), 3119 states have internal predecessors, (10982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 10982 transitions. [2021-07-09 18:39:38,565 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 10982 transitions. Word has length 28 [2021-07-09 18:39:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:38,565 INFO L482 AbstractCegarLoop]: Abstraction has 3120 states and 10982 transitions. [2021-07-09 18:39:38,565 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) [2021-07-09 18:39:38,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 10982 transitions. [2021-07-09 18:39:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:38,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:38,570 INFO L508 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] [2021-07-09 18:39:38,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3908 [2021-07-09 18:39:38,773 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:38,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:38,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 59 times [2021-07-09 18:39:38,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:38,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597622852] [2021-07-09 18:39:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:38,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:38,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597622852] [2021-07-09 18:39:38,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597622852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:38,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097528247] [2021-07-09 18:39:38,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:38,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:39:38,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:38,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:38,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:38,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097528247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:38,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:38,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:39:38,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771524864] [2021-07-09 18:39:38,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:38,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:38,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:38,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:38,915 INFO L87 Difference]: Start difference. First operand 3120 states and 10982 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) [2021-07-09 18:39:39,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:39,601 INFO L93 Difference]: Finished difference Result 5035 states and 15933 transitions. [2021-07-09 18:39:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:39:39,601 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 [2021-07-09 18:39:39,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:39,611 INFO L225 Difference]: With dead ends: 5035 [2021-07-09 18:39:39,611 INFO L226 Difference]: Without dead ends: 5029 [2021-07-09 18:39:39,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 423.5ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:39:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2021-07-09 18:39:39,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 3123. [2021-07-09 18:39:39,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 3.5153747597693785) internal successors, (10975), 3122 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 10975 transitions. [2021-07-09 18:39:39,673 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 10975 transitions. Word has length 28 [2021-07-09 18:39:39,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:39,673 INFO L482 AbstractCegarLoop]: Abstraction has 3123 states and 10975 transitions. [2021-07-09 18:39:39,673 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) [2021-07-09 18:39:39,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 10975 transitions. [2021-07-09 18:39:39,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:39,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:39,678 INFO L508 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] [2021-07-09 18:39:39,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:39,894 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:39,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 60 times [2021-07-09 18:39:39,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:39,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894378314] [2021-07-09 18:39:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:39,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:39,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894378314] [2021-07-09 18:39:39,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894378314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:39,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981661443] [2021-07-09 18:39:39,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:39,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:39:39,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:39,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:39,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:40,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981661443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:40,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:40,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:40,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064562551] [2021-07-09 18:39:40,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:40,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:40,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:40,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:40,018 INFO L87 Difference]: Start difference. First operand 3123 states and 10975 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) [2021-07-09 18:39:40,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:40,592 INFO L93 Difference]: Finished difference Result 5805 states and 18700 transitions. [2021-07-09 18:39:40,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:39:40,592 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 [2021-07-09 18:39:40,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:40,602 INFO L225 Difference]: With dead ends: 5805 [2021-07-09 18:39:40,602 INFO L226 Difference]: Without dead ends: 5722 [2021-07-09 18:39:40,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:39:40,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5722 states. [2021-07-09 18:39:40,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5722 to 3270. [2021-07-09 18:39:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 3269 states have (on average 3.5460385438972164) internal successors, (11592), 3269 states have internal predecessors, (11592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 11592 transitions. [2021-07-09 18:39:40,671 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 11592 transitions. Word has length 28 [2021-07-09 18:39:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:40,671 INFO L482 AbstractCegarLoop]: Abstraction has 3270 states and 11592 transitions. [2021-07-09 18:39:40,672 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) [2021-07-09 18:39:40,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 11592 transitions. [2021-07-09 18:39:40,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:40,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:40,677 INFO L508 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] [2021-07-09 18:39:40,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3910,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:40,877 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:40,877 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 61 times [2021-07-09 18:39:40,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:40,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147272143] [2021-07-09 18:39:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:40,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:40,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147272143] [2021-07-09 18:39:40,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147272143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:40,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558669060] [2021-07-09 18:39:40,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:40,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:39:40,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:39:40,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558669060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:40,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:40,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:39:40,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402963598] [2021-07-09 18:39:40,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:39:40,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:40,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:39:40,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:39:40,987 INFO L87 Difference]: Start difference. First operand 3270 states and 11592 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) [2021-07-09 18:39:41,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:41,144 INFO L93 Difference]: Finished difference Result 4551 states and 15064 transitions. [2021-07-09 18:39:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:39:41,145 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 [2021-07-09 18:39:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:41,152 INFO L225 Difference]: With dead ends: 4551 [2021-07-09 18:39:41,152 INFO L226 Difference]: Without dead ends: 4551 [2021-07-09 18:39:41,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:39:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-07-09 18:39:41,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3038. [2021-07-09 18:39:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 3.5284820546592033) internal successors, (10716), 3037 states have internal predecessors, (10716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:41,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 10716 transitions. [2021-07-09 18:39:41,203 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 10716 transitions. Word has length 28 [2021-07-09 18:39:41,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:41,203 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 10716 transitions. [2021-07-09 18:39:41,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 10716 transitions. [2021-07-09 18:39:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:41,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:41,207 INFO L508 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] [2021-07-09 18:39:41,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-07-09 18:39:41,408 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:41,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 62 times [2021-07-09 18:39:41,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:41,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570475799] [2021-07-09 18:39:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:41,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:41,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570475799] [2021-07-09 18:39:41,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570475799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:41,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595112440] [2021-07-09 18:39:41,442 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 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 [2021-07-09 18:39:41,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:41,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:41,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:41,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:41,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595112440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:41,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:41,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:41,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969485311] [2021-07-09 18:39:41,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:41,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:41,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:41,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:41,541 INFO L87 Difference]: Start difference. First operand 3038 states and 10716 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) [2021-07-09 18:39:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:42,194 INFO L93 Difference]: Finished difference Result 6432 states and 20472 transitions. [2021-07-09 18:39:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:39:42,194 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 [2021-07-09 18:39:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:42,207 INFO L225 Difference]: With dead ends: 6432 [2021-07-09 18:39:42,207 INFO L226 Difference]: Without dead ends: 6432 [2021-07-09 18:39:42,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 378.6ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:39:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6432 states. [2021-07-09 18:39:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6432 to 3056. [2021-07-09 18:39:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3055 states have (on average 3.528314238952537) internal successors, (10779), 3055 states have internal predecessors, (10779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 10779 transitions. [2021-07-09 18:39:42,283 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 10779 transitions. Word has length 28 [2021-07-09 18:39:42,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:42,283 INFO L482 AbstractCegarLoop]: Abstraction has 3056 states and 10779 transitions. [2021-07-09 18:39:42,283 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) [2021-07-09 18:39:42,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 10779 transitions. [2021-07-09 18:39:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:42,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:42,287 INFO L508 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] [2021-07-09 18:39:42,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3912 [2021-07-09 18:39:42,501 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:42,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:42,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 63 times [2021-07-09 18:39:42,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:42,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778390059] [2021-07-09 18:39:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:42,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778390059] [2021-07-09 18:39:42,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778390059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066856978] [2021-07-09 18:39:42,533 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 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 [2021-07-09 18:39:42,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:39:42,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:42,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:42,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066856978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:42,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:42,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:42,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249010836] [2021-07-09 18:39:42,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:42,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:42,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:42,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:42,629 INFO L87 Difference]: Start difference. First operand 3056 states and 10779 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) [2021-07-09 18:39:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:43,380 INFO L93 Difference]: Finished difference Result 6687 states and 21252 transitions. [2021-07-09 18:39:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:39:43,381 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 [2021-07-09 18:39:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:43,393 INFO L225 Difference]: With dead ends: 6687 [2021-07-09 18:39:43,393 INFO L226 Difference]: Without dead ends: 6687 [2021-07-09 18:39:43,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 410.7ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:39:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6687 states. [2021-07-09 18:39:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6687 to 3150. [2021-07-09 18:39:43,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3150 states, 3149 states have (on average 3.520482692918387) internal successors, (11086), 3149 states have internal predecessors, (11086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 11086 transitions. [2021-07-09 18:39:43,468 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 11086 transitions. Word has length 28 [2021-07-09 18:39:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:43,468 INFO L482 AbstractCegarLoop]: Abstraction has 3150 states and 11086 transitions. [2021-07-09 18:39:43,468 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) [2021-07-09 18:39:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 11086 transitions. [2021-07-09 18:39:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:43,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:43,472 INFO L508 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] [2021-07-09 18:39:43,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3913 [2021-07-09 18:39:43,673 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 64 times [2021-07-09 18:39:43,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:43,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741101582] [2021-07-09 18:39:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:43,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:43,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741101582] [2021-07-09 18:39:43,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741101582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:43,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778981980] [2021-07-09 18:39:43,709 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 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 [2021-07-09 18:39:43,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:43,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:43,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:43,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:43,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778981980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:43,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:43,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:43,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815576038] [2021-07-09 18:39:43,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:43,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:43,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:43,799 INFO L87 Difference]: Start difference. First operand 3150 states and 11086 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) [2021-07-09 18:39:44,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:44,385 INFO L93 Difference]: Finished difference Result 6847 states and 21782 transitions. [2021-07-09 18:39:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:39:44,385 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 [2021-07-09 18:39:44,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:44,399 INFO L225 Difference]: With dead ends: 6847 [2021-07-09 18:39:44,399 INFO L226 Difference]: Without dead ends: 6811 [2021-07-09 18:39:44,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:39:44,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6811 states. [2021-07-09 18:39:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6811 to 3552. [2021-07-09 18:39:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 3.5457617572514786) internal successors, (12591), 3551 states have internal predecessors, (12591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 12591 transitions. [2021-07-09 18:39:44,496 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 12591 transitions. Word has length 28 [2021-07-09 18:39:44,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:44,496 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 12591 transitions. [2021-07-09 18:39:44,496 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) [2021-07-09 18:39:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 12591 transitions. [2021-07-09 18:39:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:44,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:44,501 INFO L508 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] [2021-07-09 18:39:44,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3914,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:44,702 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:44,702 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 65 times [2021-07-09 18:39:44,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:44,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798951994] [2021-07-09 18:39:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:44,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:44,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798951994] [2021-07-09 18:39:44,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798951994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:44,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063379715] [2021-07-09 18:39:44,734 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 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 [2021-07-09 18:39:44,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:39:44,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:44,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:39:44,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:44,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063379715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:44,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:44,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:44,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989294854] [2021-07-09 18:39:44,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:44,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:44,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:44,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:44,826 INFO L87 Difference]: Start difference. First operand 3552 states and 12591 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) [2021-07-09 18:39:45,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:45,397 INFO L93 Difference]: Finished difference Result 7020 states and 22256 transitions. [2021-07-09 18:39:45,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:39:45,397 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 [2021-07-09 18:39:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:45,410 INFO L225 Difference]: With dead ends: 7020 [2021-07-09 18:39:45,410 INFO L226 Difference]: Without dead ends: 7020 [2021-07-09 18:39:45,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:39:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7020 states. [2021-07-09 18:39:45,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7020 to 3265. [2021-07-09 18:39:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3265 states, 3264 states have (on average 3.5082720588235294) internal successors, (11451), 3264 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3265 states to 3265 states and 11451 transitions. [2021-07-09 18:39:45,490 INFO L78 Accepts]: Start accepts. Automaton has 3265 states and 11451 transitions. Word has length 28 [2021-07-09 18:39:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:45,490 INFO L482 AbstractCegarLoop]: Abstraction has 3265 states and 11451 transitions. [2021-07-09 18:39:45,490 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) [2021-07-09 18:39:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3265 states and 11451 transitions. [2021-07-09 18:39:45,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:45,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:45,495 INFO L508 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] [2021-07-09 18:39:45,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3915 [2021-07-09 18:39:45,695 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:45,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:45,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 66 times [2021-07-09 18:39:45,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:45,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674791978] [2021-07-09 18:39:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:45,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:45,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674791978] [2021-07-09 18:39:45,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674791978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065042824] [2021-07-09 18:39:45,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:39:45,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:39:45,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:45,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:45,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:45,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065042824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:45,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:45,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:39:45,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849983016] [2021-07-09 18:39:45,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:39:45,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:45,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:39:45,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:39:45,854 INFO L87 Difference]: Start difference. First operand 3265 states and 11451 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) [2021-07-09 18:39:46,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:46,562 INFO L93 Difference]: Finished difference Result 6180 states and 19991 transitions. [2021-07-09 18:39:46,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:39:46,563 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 [2021-07-09 18:39:46,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:46,574 INFO L225 Difference]: With dead ends: 6180 [2021-07-09 18:39:46,574 INFO L226 Difference]: Without dead ends: 6176 [2021-07-09 18:39:46,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:39:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-07-09 18:39:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 3025. [2021-07-09 18:39:46,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 3.5327380952380953) internal successors, (10683), 3024 states have internal predecessors, (10683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 10683 transitions. [2021-07-09 18:39:46,640 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 10683 transitions. Word has length 28 [2021-07-09 18:39:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:46,640 INFO L482 AbstractCegarLoop]: Abstraction has 3025 states and 10683 transitions. [2021-07-09 18:39:46,640 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) [2021-07-09 18:39:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 10683 transitions. [2021-07-09 18:39:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:46,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:46,644 INFO L508 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] [2021-07-09 18:39:46,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3916 [2021-07-09 18:39:46,845 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 67 times [2021-07-09 18:39:46,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:46,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309955562] [2021-07-09 18:39:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:46,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:46,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309955562] [2021-07-09 18:39:46,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309955562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:46,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614524839] [2021-07-09 18:39:46,889 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:39:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:46,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:46,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:47,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614524839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:47,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:47,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:39:47,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187301341] [2021-07-09 18:39:47,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:47,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:47,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:47,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:47,006 INFO L87 Difference]: Start difference. First operand 3025 states and 10683 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) [2021-07-09 18:39:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:48,046 INFO L93 Difference]: Finished difference Result 9433 states and 30825 transitions. [2021-07-09 18:39:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:39:48,046 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 [2021-07-09 18:39:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:48,070 INFO L225 Difference]: With dead ends: 9433 [2021-07-09 18:39:48,070 INFO L226 Difference]: Without dead ends: 9433 [2021-07-09 18:39:48,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 592.0ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:39:48,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-07-09 18:39:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 3201. [2021-07-09 18:39:48,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 3.6003125) internal successors, (11521), 3200 states have internal predecessors, (11521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 11521 transitions. [2021-07-09 18:39:48,172 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 11521 transitions. Word has length 28 [2021-07-09 18:39:48,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:48,172 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 11521 transitions. [2021-07-09 18:39:48,172 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) [2021-07-09 18:39:48,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 11521 transitions. [2021-07-09 18:39:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:48,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:48,177 INFO L508 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] [2021-07-09 18:39:48,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3917 [2021-07-09 18:39:48,377 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:48,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:48,377 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 68 times [2021-07-09 18:39:48,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:48,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752769524] [2021-07-09 18:39:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:48,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:48,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752769524] [2021-07-09 18:39:48,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752769524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:48,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693466850] [2021-07-09 18:39:48,414 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 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 [2021-07-09 18:39:48,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:48,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:48,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:48,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:48,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:48,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693466850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:48,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:48,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:39:48,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829757356] [2021-07-09 18:39:48,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:48,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:48,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:48,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:48,535 INFO L87 Difference]: Start difference. First operand 3201 states and 11521 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) [2021-07-09 18:39:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:49,534 INFO L93 Difference]: Finished difference Result 9262 states and 30360 transitions. [2021-07-09 18:39:49,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:39:49,534 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 [2021-07-09 18:39:49,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:49,555 INFO L225 Difference]: With dead ends: 9262 [2021-07-09 18:39:49,555 INFO L226 Difference]: Without dead ends: 9262 [2021-07-09 18:39:49,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 602.0ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:39:49,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2021-07-09 18:39:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 3173. [2021-07-09 18:39:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 3172 states have (on average 3.5851197982345524) internal successors, (11372), 3172 states have internal predecessors, (11372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 11372 transitions. [2021-07-09 18:39:49,660 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 11372 transitions. Word has length 28 [2021-07-09 18:39:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:49,660 INFO L482 AbstractCegarLoop]: Abstraction has 3173 states and 11372 transitions. [2021-07-09 18:39:49,660 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) [2021-07-09 18:39:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 11372 transitions. [2021-07-09 18:39:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:49,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:49,665 INFO L508 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] [2021-07-09 18:39:49,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3918 [2021-07-09 18:39:49,865 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 69 times [2021-07-09 18:39:49,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:49,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443642308] [2021-07-09 18:39:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:49,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:49,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443642308] [2021-07-09 18:39:49,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443642308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:49,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304383554] [2021-07-09 18:39:49,898 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 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 [2021-07-09 18:39:49,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:39:49,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:49,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:50,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304383554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:50,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:50,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:39:50,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571576805] [2021-07-09 18:39:50,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:39:50,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:39:50,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:39:50,019 INFO L87 Difference]: Start difference. First operand 3173 states and 11372 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) [2021-07-09 18:39:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:50,914 INFO L93 Difference]: Finished difference Result 8699 states and 27601 transitions. [2021-07-09 18:39:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:39:50,914 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 [2021-07-09 18:39:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:50,933 INFO L225 Difference]: With dead ends: 8699 [2021-07-09 18:39:50,933 INFO L226 Difference]: Without dead ends: 8699 [2021-07-09 18:39:50,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 509.5ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:39:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8699 states. [2021-07-09 18:39:51,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8699 to 3193. [2021-07-09 18:39:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3193 states, 3192 states have (on average 3.588345864661654) internal successors, (11454), 3192 states have internal predecessors, (11454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 11454 transitions. [2021-07-09 18:39:51,024 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 11454 transitions. Word has length 28 [2021-07-09 18:39:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:51,024 INFO L482 AbstractCegarLoop]: Abstraction has 3193 states and 11454 transitions. [2021-07-09 18:39:51,025 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) [2021-07-09 18:39:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 11454 transitions. [2021-07-09 18:39:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:51,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:51,029 INFO L508 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] [2021-07-09 18:39:51,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3919 [2021-07-09 18:39:51,229 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:51,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:51,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 70 times [2021-07-09 18:39:51,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:51,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993346372] [2021-07-09 18:39:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:51,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:51,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993346372] [2021-07-09 18:39:51,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993346372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:51,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610244860] [2021-07-09 18:39:51,277 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 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 [2021-07-09 18:39:51,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:39:51,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:51,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:51,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:51,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610244860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:51,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:51,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:39:51,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815207962] [2021-07-09 18:39:51,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:39:51,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:51,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:39:51,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:39:51,374 INFO L87 Difference]: Start difference. First operand 3193 states and 11454 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) [2021-07-09 18:39:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:52,234 INFO L93 Difference]: Finished difference Result 8208 states and 26413 transitions. [2021-07-09 18:39:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:39:52,234 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 [2021-07-09 18:39:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:52,249 INFO L225 Difference]: With dead ends: 8208 [2021-07-09 18:39:52,249 INFO L226 Difference]: Without dead ends: 8200 [2021-07-09 18:39:52,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:39:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8200 states. [2021-07-09 18:39:52,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8200 to 3175. [2021-07-09 18:39:52,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 3.584436042848141) internal successors, (11377), 3174 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 11377 transitions. [2021-07-09 18:39:52,353 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 11377 transitions. Word has length 28 [2021-07-09 18:39:52,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:52,353 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 11377 transitions. [2021-07-09 18:39:52,353 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) [2021-07-09 18:39:52,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 11377 transitions. [2021-07-09 18:39:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:52,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:52,358 INFO L508 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] [2021-07-09 18:39:52,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3920,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:52,573 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:52,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:52,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 71 times [2021-07-09 18:39:52,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:52,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472038883] [2021-07-09 18:39:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:52,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:52,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472038883] [2021-07-09 18:39:52,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472038883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:52,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907878539] [2021-07-09 18:39:52,621 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 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 [2021-07-09 18:39:52,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:39:52,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:52,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:52,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:52,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907878539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:52,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:52,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:39:52,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198522281] [2021-07-09 18:39:52,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:52,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:52,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:52,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:52,735 INFO L87 Difference]: Start difference. First operand 3175 states and 11377 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) [2021-07-09 18:39:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:53,682 INFO L93 Difference]: Finished difference Result 8126 states and 26160 transitions. [2021-07-09 18:39:53,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:39:53,682 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 [2021-07-09 18:39:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:53,697 INFO L225 Difference]: With dead ends: 8126 [2021-07-09 18:39:53,697 INFO L226 Difference]: Without dead ends: 8126 [2021-07-09 18:39:53,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 526.7ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:39:53,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-07-09 18:39:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 3191. [2021-07-09 18:39:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 3.5865203761755486) internal successors, (11441), 3190 states have internal predecessors, (11441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 11441 transitions. [2021-07-09 18:39:53,796 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 11441 transitions. Word has length 28 [2021-07-09 18:39:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:53,796 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 11441 transitions. [2021-07-09 18:39:53,796 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) [2021-07-09 18:39:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 11441 transitions. [2021-07-09 18:39:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:53,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:53,801 INFO L508 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] [2021-07-09 18:39:54,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3921 [2021-07-09 18:39:54,001 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:54,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:54,002 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 72 times [2021-07-09 18:39:54,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:54,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735714351] [2021-07-09 18:39:54,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:54,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:54,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735714351] [2021-07-09 18:39:54,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735714351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:54,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748927842] [2021-07-09 18:39:54,037 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 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 [2021-07-09 18:39:54,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:39:54,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:54,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:54,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:54,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748927842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:54,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:54,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:39:54,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246475904] [2021-07-09 18:39:54,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:54,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:54,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:54,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:54,148 INFO L87 Difference]: Start difference. First operand 3191 states and 11441 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) [2021-07-09 18:39:55,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:55,034 INFO L93 Difference]: Finished difference Result 7794 states and 25376 transitions. [2021-07-09 18:39:55,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:39:55,034 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 [2021-07-09 18:39:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:55,049 INFO L225 Difference]: With dead ends: 7794 [2021-07-09 18:39:55,049 INFO L226 Difference]: Without dead ends: 7786 [2021-07-09 18:39:55,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:39:55,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7786 states. [2021-07-09 18:39:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7786 to 2948. [2021-07-09 18:39:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 3.508313539192399) internal successors, (10339), 2947 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:55,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 10339 transitions. [2021-07-09 18:39:55,149 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 10339 transitions. Word has length 28 [2021-07-09 18:39:55,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:55,150 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 10339 transitions. [2021-07-09 18:39:55,150 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) [2021-07-09 18:39:55,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 10339 transitions. [2021-07-09 18:39:55,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:55,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:55,154 INFO L508 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] [2021-07-09 18:39:55,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3922,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:55,354 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:55,354 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 73 times [2021-07-09 18:39:55,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:55,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321985278] [2021-07-09 18:39:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:55,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:55,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321985278] [2021-07-09 18:39:55,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321985278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:55,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766103360] [2021-07-09 18:39:55,391 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 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 [2021-07-09 18:39:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:55,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:55,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:55,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766103360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:55,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:55,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:39:55,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005560267] [2021-07-09 18:39:55,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:39:55,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:55,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:39:55,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:39:55,513 INFO L87 Difference]: Start difference. First operand 2948 states and 10339 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) [2021-07-09 18:39:56,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:56,348 INFO L93 Difference]: Finished difference Result 6003 states and 19292 transitions. [2021-07-09 18:39:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:39:56,348 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 [2021-07-09 18:39:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:56,359 INFO L225 Difference]: With dead ends: 6003 [2021-07-09 18:39:56,359 INFO L226 Difference]: Without dead ends: 6003 [2021-07-09 18:39:56,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 509.6ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:39:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6003 states. [2021-07-09 18:39:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6003 to 2960. [2021-07-09 18:39:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2959 states have (on average 3.5069280162216967) internal successors, (10377), 2959 states have internal predecessors, (10377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 10377 transitions. [2021-07-09 18:39:56,418 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 10377 transitions. Word has length 28 [2021-07-09 18:39:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:56,418 INFO L482 AbstractCegarLoop]: Abstraction has 2960 states and 10377 transitions. [2021-07-09 18:39:56,418 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) [2021-07-09 18:39:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 10377 transitions. [2021-07-09 18:39:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:56,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:56,422 INFO L508 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] [2021-07-09 18:39:56,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3923 [2021-07-09 18:39:56,623 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:56,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 74 times [2021-07-09 18:39:56,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:56,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526425474] [2021-07-09 18:39:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:56,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:56,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526425474] [2021-07-09 18:39:56,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526425474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:56,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122150985] [2021-07-09 18:39:56,657 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 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 [2021-07-09 18:39:56,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:39:56,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:56,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:56,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:56,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122150985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:56,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:56,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:39:56,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453520488] [2021-07-09 18:39:56,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:39:56,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:56,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:39:56,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:39:56,780 INFO L87 Difference]: Start difference. First operand 2960 states and 10377 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) [2021-07-09 18:39:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:57,800 INFO L93 Difference]: Finished difference Result 6789 states and 21302 transitions. [2021-07-09 18:39:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:39:57,800 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 [2021-07-09 18:39:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:57,813 INFO L225 Difference]: With dead ends: 6789 [2021-07-09 18:39:57,813 INFO L226 Difference]: Without dead ends: 6789 [2021-07-09 18:39:57,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 651.8ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:39:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6789 states. [2021-07-09 18:39:57,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6789 to 3026. [2021-07-09 18:39:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3025 states have (on average 3.5021487603305785) internal successors, (10594), 3025 states have internal predecessors, (10594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 10594 transitions. [2021-07-09 18:39:57,887 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 10594 transitions. Word has length 28 [2021-07-09 18:39:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:57,887 INFO L482 AbstractCegarLoop]: Abstraction has 3026 states and 10594 transitions. [2021-07-09 18:39:57,887 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) [2021-07-09 18:39:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 10594 transitions. [2021-07-09 18:39:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:57,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:57,891 INFO L508 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] [2021-07-09 18:39:58,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3924,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:39:58,091 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 75 times [2021-07-09 18:39:58,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:58,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897938076] [2021-07-09 18:39:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:58,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:58,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897938076] [2021-07-09 18:39:58,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897938076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:58,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777310788] [2021-07-09 18:39:58,125 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 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 [2021-07-09 18:39:58,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:39:58,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:39:58,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:58,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777310788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:58,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:58,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:39:58,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328952891] [2021-07-09 18:39:58,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:39:58,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:58,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:39:58,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:39:58,242 INFO L87 Difference]: Start difference. First operand 3026 states and 10594 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) [2021-07-09 18:39:59,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:39:59,245 INFO L93 Difference]: Finished difference Result 6345 states and 20138 transitions. [2021-07-09 18:39:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:39:59,245 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 [2021-07-09 18:39:59,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:39:59,257 INFO L225 Difference]: With dead ends: 6345 [2021-07-09 18:39:59,257 INFO L226 Difference]: Without dead ends: 6341 [2021-07-09 18:39:59,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 596.4ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:39:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6341 states. [2021-07-09 18:39:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6341 to 2952. [2021-07-09 18:39:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.4984750931887496) internal successors, (10324), 2951 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:39:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 10324 transitions. [2021-07-09 18:39:59,323 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 10324 transitions. Word has length 28 [2021-07-09 18:39:59,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:39:59,323 INFO L482 AbstractCegarLoop]: Abstraction has 2952 states and 10324 transitions. [2021-07-09 18:39:59,323 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) [2021-07-09 18:39:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 10324 transitions. [2021-07-09 18:39:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:39:59,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:39:59,327 INFO L508 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] [2021-07-09 18:39:59,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3925 [2021-07-09 18:39:59,527 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:39:59,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:39:59,528 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 67 times [2021-07-09 18:39:59,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:39:59,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870372751] [2021-07-09 18:39:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:39:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:59,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:39:59,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870372751] [2021-07-09 18:39:59,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870372751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:59,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447711061] [2021-07-09 18:39:59,569 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 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 [2021-07-09 18:39:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:39:59,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:39:59,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:39:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:39:59,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447711061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:39:59,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:39:59,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:39:59,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99496846] [2021-07-09 18:39:59,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:39:59,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:39:59,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:39:59,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:39:59,665 INFO L87 Difference]: Start difference. First operand 2952 states and 10324 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) [2021-07-09 18:40:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:00,189 INFO L93 Difference]: Finished difference Result 5472 states and 17679 transitions. [2021-07-09 18:40:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:40:00,189 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 [2021-07-09 18:40:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:00,199 INFO L225 Difference]: With dead ends: 5472 [2021-07-09 18:40:00,199 INFO L226 Difference]: Without dead ends: 5472 [2021-07-09 18:40:00,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:40:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-07-09 18:40:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 2952. [2021-07-09 18:40:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.5005083022704166) internal successors, (10330), 2951 states have internal predecessors, (10330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:00,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 10330 transitions. [2021-07-09 18:40:00,268 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 10330 transitions. Word has length 28 [2021-07-09 18:40:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:00,268 INFO L482 AbstractCegarLoop]: Abstraction has 2952 states and 10330 transitions. [2021-07-09 18:40:00,268 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) [2021-07-09 18:40:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 10330 transitions. [2021-07-09 18:40:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:00,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:00,272 INFO L508 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] [2021-07-09 18:40:00,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3926 [2021-07-09 18:40:00,473 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 68 times [2021-07-09 18:40:00,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:00,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967687776] [2021-07-09 18:40:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:00,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:00,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967687776] [2021-07-09 18:40:00,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967687776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:00,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230274923] [2021-07-09 18:40:00,513 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 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 [2021-07-09 18:40:00,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:00,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:00,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:00,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:00,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230274923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:00,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:00,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:00,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483425591] [2021-07-09 18:40:00,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:00,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:00,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:00,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:00,612 INFO L87 Difference]: Start difference. First operand 2952 states and 10330 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) [2021-07-09 18:40:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:01,320 INFO L93 Difference]: Finished difference Result 5809 states and 18633 transitions. [2021-07-09 18:40:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:40:01,320 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 [2021-07-09 18:40:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:01,330 INFO L225 Difference]: With dead ends: 5809 [2021-07-09 18:40:01,331 INFO L226 Difference]: Without dead ends: 5809 [2021-07-09 18:40:01,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:40:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5809 states. [2021-07-09 18:40:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5809 to 2943. [2021-07-09 18:40:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 2942 states have (on average 3.500679809653297) internal successors, (10299), 2942 states have internal predecessors, (10299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 10299 transitions. [2021-07-09 18:40:01,389 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 10299 transitions. Word has length 28 [2021-07-09 18:40:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:01,389 INFO L482 AbstractCegarLoop]: Abstraction has 2943 states and 10299 transitions. [2021-07-09 18:40:01,390 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) [2021-07-09 18:40:01,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 10299 transitions. [2021-07-09 18:40:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:01,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:01,393 INFO L508 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] [2021-07-09 18:40:01,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3927 [2021-07-09 18:40:01,596 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:01,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 69 times [2021-07-09 18:40:01,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:01,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373377834] [2021-07-09 18:40:01,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:01,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:01,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373377834] [2021-07-09 18:40:01,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373377834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:01,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755758346] [2021-07-09 18:40:01,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:40:01,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:01,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:01,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:01,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:01,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755758346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:01,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:01,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:01,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573181663] [2021-07-09 18:40:01,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:01,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:01,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:01,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:01,735 INFO L87 Difference]: Start difference. First operand 2943 states and 10299 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) [2021-07-09 18:40:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:02,532 INFO L93 Difference]: Finished difference Result 6283 states and 19914 transitions. [2021-07-09 18:40:02,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:40:02,532 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 [2021-07-09 18:40:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:02,543 INFO L225 Difference]: With dead ends: 6283 [2021-07-09 18:40:02,543 INFO L226 Difference]: Without dead ends: 6283 [2021-07-09 18:40:02,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:40:02,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6283 states. [2021-07-09 18:40:02,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6283 to 3003. [2021-07-09 18:40:02,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.4966688874083944) internal successors, (10497), 3002 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10497 transitions. [2021-07-09 18:40:02,607 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10497 transitions. Word has length 28 [2021-07-09 18:40:02,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:02,607 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 10497 transitions. [2021-07-09 18:40:02,607 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) [2021-07-09 18:40:02,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10497 transitions. [2021-07-09 18:40:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:02,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:02,611 INFO L508 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] [2021-07-09 18:40:02,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3928 [2021-07-09 18:40:02,812 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:02,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:02,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 70 times [2021-07-09 18:40:02,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:02,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233079543] [2021-07-09 18:40:02,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:02,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:02,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233079543] [2021-07-09 18:40:02,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233079543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:02,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207552543] [2021-07-09 18:40:02,846 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 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 [2021-07-09 18:40:02,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:02,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:02,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:02,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:02,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207552543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:02,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:02,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:40:02,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481943196] [2021-07-09 18:40:02,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:02,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:02,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:02,961 INFO L87 Difference]: Start difference. First operand 3003 states and 10497 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) [2021-07-09 18:40:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:03,503 INFO L93 Difference]: Finished difference Result 7087 states and 23881 transitions. [2021-07-09 18:40:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:40:03,503 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 [2021-07-09 18:40:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:03,517 INFO L225 Difference]: With dead ends: 7087 [2021-07-09 18:40:03,517 INFO L226 Difference]: Without dead ends: 7087 [2021-07-09 18:40:03,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:40:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7087 states. [2021-07-09 18:40:03,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7087 to 4173. [2021-07-09 18:40:03,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 3.6116970278044103) internal successors, (15068), 4172 states have internal predecessors, (15068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 15068 transitions. [2021-07-09 18:40:03,624 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 15068 transitions. Word has length 28 [2021-07-09 18:40:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:03,624 INFO L482 AbstractCegarLoop]: Abstraction has 4173 states and 15068 transitions. [2021-07-09 18:40:03,624 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) [2021-07-09 18:40:03,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 15068 transitions. [2021-07-09 18:40:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:03,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:03,630 INFO L508 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] [2021-07-09 18:40:03,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3929 [2021-07-09 18:40:03,830 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:03,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:03,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 71 times [2021-07-09 18:40:03,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:03,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236281416] [2021-07-09 18:40:03,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:03,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:03,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236281416] [2021-07-09 18:40:03,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236281416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:03,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440619308] [2021-07-09 18:40:03,870 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 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 [2021-07-09 18:40:03,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:40:03,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:03,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:03,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:03,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440619308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:03,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:03,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:40:03,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731632644] [2021-07-09 18:40:03,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:03,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:03,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:03,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:03,961 INFO L87 Difference]: Start difference. First operand 4173 states and 15068 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) [2021-07-09 18:40:04,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:04,691 INFO L93 Difference]: Finished difference Result 7520 states and 25447 transitions. [2021-07-09 18:40:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:40:04,691 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 [2021-07-09 18:40:04,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:04,706 INFO L225 Difference]: With dead ends: 7520 [2021-07-09 18:40:04,706 INFO L226 Difference]: Without dead ends: 7516 [2021-07-09 18:40:04,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:40:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-07-09 18:40:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 4065. [2021-07-09 18:40:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 3.6205708661417324) internal successors, (14714), 4064 states have internal predecessors, (14714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 14714 transitions. [2021-07-09 18:40:04,793 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 14714 transitions. Word has length 28 [2021-07-09 18:40:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:04,793 INFO L482 AbstractCegarLoop]: Abstraction has 4065 states and 14714 transitions. [2021-07-09 18:40:04,794 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) [2021-07-09 18:40:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 14714 transitions. [2021-07-09 18:40:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:04,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:04,799 INFO L508 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] [2021-07-09 18:40:05,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3930,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:05,000 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:05,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:05,000 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 76 times [2021-07-09 18:40:05,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:05,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424023444] [2021-07-09 18:40:05,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:05,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:05,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424023444] [2021-07-09 18:40:05,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424023444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:05,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242311644] [2021-07-09 18:40:05,027 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 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 [2021-07-09 18:40:05,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:05,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:05,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:05,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:05,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242311644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:05,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:05,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:40:05,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667585014] [2021-07-09 18:40:05,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:05,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:05,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:05,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:05,132 INFO L87 Difference]: Start difference. First operand 4065 states and 14714 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) [2021-07-09 18:40:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:05,922 INFO L93 Difference]: Finished difference Result 8329 states and 27951 transitions. [2021-07-09 18:40:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:40:05,922 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 [2021-07-09 18:40:05,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:05,937 INFO L225 Difference]: With dead ends: 8329 [2021-07-09 18:40:05,938 INFO L226 Difference]: Without dead ends: 8320 [2021-07-09 18:40:05,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:40:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8320 states. [2021-07-09 18:40:06,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8320 to 4505. [2021-07-09 18:40:06,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4504 states have (on average 3.70892539964476) internal successors, (16705), 4504 states have internal predecessors, (16705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 16705 transitions. [2021-07-09 18:40:06,033 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 16705 transitions. Word has length 28 [2021-07-09 18:40:06,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:06,033 INFO L482 AbstractCegarLoop]: Abstraction has 4505 states and 16705 transitions. [2021-07-09 18:40:06,033 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) [2021-07-09 18:40:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 16705 transitions. [2021-07-09 18:40:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:06,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:06,039 INFO L508 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] [2021-07-09 18:40:06,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:06,240 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:06,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 77 times [2021-07-09 18:40:06,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:06,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554797141] [2021-07-09 18:40:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:06,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:06,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554797141] [2021-07-09 18:40:06,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554797141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:06,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490316865] [2021-07-09 18:40:06,270 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 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 [2021-07-09 18:40:06,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:40:06,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:06,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:06,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:06,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490316865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:06,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:06,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:40:06,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101933084] [2021-07-09 18:40:06,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:06,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:06,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:06,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:06,374 INFO L87 Difference]: Start difference. First operand 4505 states and 16705 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) [2021-07-09 18:40:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:07,134 INFO L93 Difference]: Finished difference Result 8622 states and 28858 transitions. [2021-07-09 18:40:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:40:07,134 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 [2021-07-09 18:40:07,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:07,150 INFO L225 Difference]: With dead ends: 8622 [2021-07-09 18:40:07,150 INFO L226 Difference]: Without dead ends: 8622 [2021-07-09 18:40:07,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:40:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8622 states. [2021-07-09 18:40:07,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8622 to 4525. [2021-07-09 18:40:07,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4525 states, 4524 states have (on average 3.6965075154730327) internal successors, (16723), 4524 states have internal predecessors, (16723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4525 states to 4525 states and 16723 transitions. [2021-07-09 18:40:07,253 INFO L78 Accepts]: Start accepts. Automaton has 4525 states and 16723 transitions. Word has length 28 [2021-07-09 18:40:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:07,253 INFO L482 AbstractCegarLoop]: Abstraction has 4525 states and 16723 transitions. [2021-07-09 18:40:07,253 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) [2021-07-09 18:40:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4525 states and 16723 transitions. [2021-07-09 18:40:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:07,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:07,260 INFO L508 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] [2021-07-09 18:40:07,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3932,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:07,476 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 78 times [2021-07-09 18:40:07,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:07,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849420448] [2021-07-09 18:40:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:07,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:07,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849420448] [2021-07-09 18:40:07,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849420448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:07,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658474650] [2021-07-09 18:40:07,511 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 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 [2021-07-09 18:40:07,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:40:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:07,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:07,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658474650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:07,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:07,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:40:07,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518972045] [2021-07-09 18:40:07,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:07,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:07,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:07,593 INFO L87 Difference]: Start difference. First operand 4525 states and 16723 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) [2021-07-09 18:40:07,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:07,992 INFO L93 Difference]: Finished difference Result 8054 states and 28373 transitions. [2021-07-09 18:40:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:40:07,992 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 [2021-07-09 18:40:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:08,008 INFO L225 Difference]: With dead ends: 8054 [2021-07-09 18:40:08,008 INFO L226 Difference]: Without dead ends: 7950 [2021-07-09 18:40:08,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:40:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2021-07-09 18:40:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 5973. [2021-07-09 18:40:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5973 states, 5972 states have (on average 3.7582049564634965) internal successors, (22444), 5972 states have internal predecessors, (22444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:08,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5973 states to 5973 states and 22444 transitions. [2021-07-09 18:40:08,151 INFO L78 Accepts]: Start accepts. Automaton has 5973 states and 22444 transitions. Word has length 28 [2021-07-09 18:40:08,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:08,151 INFO L482 AbstractCegarLoop]: Abstraction has 5973 states and 22444 transitions. [2021-07-09 18:40:08,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:08,152 INFO L276 IsEmpty]: Start isEmpty. Operand 5973 states and 22444 transitions. [2021-07-09 18:40:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:08,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:08,163 INFO L508 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] [2021-07-09 18:40:08,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3933 [2021-07-09 18:40:08,363 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:08,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:08,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 79 times [2021-07-09 18:40:08,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:08,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494074417] [2021-07-09 18:40:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:08,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:08,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494074417] [2021-07-09 18:40:08,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494074417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:08,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954682231] [2021-07-09 18:40:08,390 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 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 [2021-07-09 18:40:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:08,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:40:08,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:08,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954682231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:08,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:08,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:40:08,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587181859] [2021-07-09 18:40:08,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:40:08,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:08,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:40:08,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:40:08,465 INFO L87 Difference]: Start difference. First operand 5973 states and 22444 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) [2021-07-09 18:40:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:08,632 INFO L93 Difference]: Finished difference Result 8289 states and 29168 transitions. [2021-07-09 18:40:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:40:08,632 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 [2021-07-09 18:40:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:08,648 INFO L225 Difference]: With dead ends: 8289 [2021-07-09 18:40:08,648 INFO L226 Difference]: Without dead ends: 8289 [2021-07-09 18:40:08,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:40:08,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-07-09 18:40:08,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 6119. [2021-07-09 18:40:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 6118 states have (on average 3.7355344883949004) internal successors, (22854), 6118 states have internal predecessors, (22854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 22854 transitions. [2021-07-09 18:40:08,774 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 22854 transitions. Word has length 28 [2021-07-09 18:40:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:08,775 INFO L482 AbstractCegarLoop]: Abstraction has 6119 states and 22854 transitions. [2021-07-09 18:40:08,775 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) [2021-07-09 18:40:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 22854 transitions. [2021-07-09 18:40:08,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:08,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:08,784 INFO L508 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] [2021-07-09 18:40:08,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3934,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:08,984 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:08,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 80 times [2021-07-09 18:40:08,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:08,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174924492] [2021-07-09 18:40:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:09,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:09,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174924492] [2021-07-09 18:40:09,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174924492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:09,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510408861] [2021-07-09 18:40:09,027 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 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 [2021-07-09 18:40:09,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:09,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:09,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510408861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:09,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:09,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:40:09,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45764118] [2021-07-09 18:40:09,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:09,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:09,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:09,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:09,114 INFO L87 Difference]: Start difference. First operand 6119 states and 22854 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) [2021-07-09 18:40:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:09,834 INFO L93 Difference]: Finished difference Result 12663 states and 44044 transitions. [2021-07-09 18:40:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:40:09,835 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 [2021-07-09 18:40:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:09,864 INFO L225 Difference]: With dead ends: 12663 [2021-07-09 18:40:09,864 INFO L226 Difference]: Without dead ends: 12663 [2021-07-09 18:40:09,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 432.6ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:40:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12663 states. [2021-07-09 18:40:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12663 to 6788. [2021-07-09 18:40:10,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6788 states, 6787 states have (on average 3.7501105053779282) internal successors, (25452), 6787 states have internal predecessors, (25452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:10,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6788 states to 6788 states and 25452 transitions. [2021-07-09 18:40:10,060 INFO L78 Accepts]: Start accepts. Automaton has 6788 states and 25452 transitions. Word has length 28 [2021-07-09 18:40:10,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:10,060 INFO L482 AbstractCegarLoop]: Abstraction has 6788 states and 25452 transitions. [2021-07-09 18:40:10,060 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) [2021-07-09 18:40:10,060 INFO L276 IsEmpty]: Start isEmpty. Operand 6788 states and 25452 transitions. [2021-07-09 18:40:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:10,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:10,072 INFO L508 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] [2021-07-09 18:40:10,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3935 [2021-07-09 18:40:10,273 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:10,273 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 81 times [2021-07-09 18:40:10,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:10,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759749594] [2021-07-09 18:40:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:10,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:10,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759749594] [2021-07-09 18:40:10,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759749594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:10,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313376694] [2021-07-09 18:40:10,307 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 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 [2021-07-09 18:40:10,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:10,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:10,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:10,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:10,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313376694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:10,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:10,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 18:40:10,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940024379] [2021-07-09 18:40:10,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:10,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:10,392 INFO L87 Difference]: Start difference. First operand 6788 states and 25452 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) [2021-07-09 18:40:11,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:11,061 INFO L93 Difference]: Finished difference Result 12824 states and 44637 transitions. [2021-07-09 18:40:11,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:40:11,062 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 [2021-07-09 18:40:11,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:11,094 INFO L225 Difference]: With dead ends: 12824 [2021-07-09 18:40:11,094 INFO L226 Difference]: Without dead ends: 12824 [2021-07-09 18:40:11,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:40:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-07-09 18:40:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 7036. [2021-07-09 18:40:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 7035 states have (on average 3.729637526652452) internal successors, (26238), 7035 states have internal predecessors, (26238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 26238 transitions. [2021-07-09 18:40:11,278 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 26238 transitions. Word has length 28 [2021-07-09 18:40:11,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:11,278 INFO L482 AbstractCegarLoop]: Abstraction has 7036 states and 26238 transitions. [2021-07-09 18:40:11,278 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) [2021-07-09 18:40:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 26238 transitions. [2021-07-09 18:40:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:11,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:11,291 INFO L508 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] [2021-07-09 18:40:11,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3936,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:11,491 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:11,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:11,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 82 times [2021-07-09 18:40:11,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:11,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624393877] [2021-07-09 18:40:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:11,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:11,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624393877] [2021-07-09 18:40:11,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624393877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:11,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93093596] [2021-07-09 18:40:11,518 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 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 [2021-07-09 18:40:11,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:11,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:11,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:11,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:11,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93093596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:11,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:11,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:40:11,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953289990] [2021-07-09 18:40:11,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:40:11,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:11,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:40:11,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:40:11,602 INFO L87 Difference]: Start difference. First operand 7036 states and 26238 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) [2021-07-09 18:40:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:11,927 INFO L93 Difference]: Finished difference Result 10405 states and 36941 transitions. [2021-07-09 18:40:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:40:11,927 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 [2021-07-09 18:40:11,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:11,950 INFO L225 Difference]: With dead ends: 10405 [2021-07-09 18:40:11,950 INFO L226 Difference]: Without dead ends: 10405 [2021-07-09 18:40:11,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:40:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10405 states. [2021-07-09 18:40:12,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10405 to 7946. [2021-07-09 18:40:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7946 states, 7945 states have (on average 3.7539332913782255) internal successors, (29825), 7945 states have internal predecessors, (29825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7946 states to 7946 states and 29825 transitions. [2021-07-09 18:40:12,139 INFO L78 Accepts]: Start accepts. Automaton has 7946 states and 29825 transitions. Word has length 28 [2021-07-09 18:40:12,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:12,140 INFO L482 AbstractCegarLoop]: Abstraction has 7946 states and 29825 transitions. [2021-07-09 18:40:12,140 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) [2021-07-09 18:40:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 7946 states and 29825 transitions. [2021-07-09 18:40:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:12,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:12,153 INFO L508 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] [2021-07-09 18:40:12,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3937,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:12,354 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:12,354 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 83 times [2021-07-09 18:40:12,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:12,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999248032] [2021-07-09 18:40:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:12,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:12,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999248032] [2021-07-09 18:40:12,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999248032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:12,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687649510] [2021-07-09 18:40:12,387 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 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 [2021-07-09 18:40:12,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:40:12,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:12,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:12,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:12,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687649510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:12,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:12,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 18:40:12,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089622761] [2021-07-09 18:40:12,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:12,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:12,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:12,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:12,468 INFO L87 Difference]: Start difference. First operand 7946 states and 29825 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) [2021-07-09 18:40:13,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:13,079 INFO L93 Difference]: Finished difference Result 13522 states and 48006 transitions. [2021-07-09 18:40:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:40:13,079 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 [2021-07-09 18:40:13,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:13,111 INFO L225 Difference]: With dead ends: 13522 [2021-07-09 18:40:13,111 INFO L226 Difference]: Without dead ends: 13518 [2021-07-09 18:40:13,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:40:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13518 states. [2021-07-09 18:40:13,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13518 to 7858. [2021-07-09 18:40:13,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7857 states have (on average 3.7557591956217387) internal successors, (29509), 7857 states have internal predecessors, (29509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 29509 transitions. [2021-07-09 18:40:13,346 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 29509 transitions. Word has length 28 [2021-07-09 18:40:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:13,346 INFO L482 AbstractCegarLoop]: Abstraction has 7858 states and 29509 transitions. [2021-07-09 18:40:13,346 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) [2021-07-09 18:40:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 29509 transitions. [2021-07-09 18:40:13,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:13,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:13,359 INFO L508 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] [2021-07-09 18:40:13,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3938 [2021-07-09 18:40:13,560 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:13,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:13,560 INFO L82 PathProgramCache]: Analyzing trace with hash -48820569, now seen corresponding path program 84 times [2021-07-09 18:40:13,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:13,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312802453] [2021-07-09 18:40:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:13,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:13,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312802453] [2021-07-09 18:40:13,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312802453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:13,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934709000] [2021-07-09 18:40:13,595 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 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 [2021-07-09 18:40:13,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:13,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:13,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:13,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:13,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934709000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:13,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:13,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:40:13,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480181641] [2021-07-09 18:40:13,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:13,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:13,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:13,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:13,693 INFO L87 Difference]: Start difference. First operand 7858 states and 29509 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) [2021-07-09 18:40:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:14,121 INFO L93 Difference]: Finished difference Result 10648 states and 37827 transitions. [2021-07-09 18:40:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:40:14,121 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 [2021-07-09 18:40:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:14,145 INFO L225 Difference]: With dead ends: 10648 [2021-07-09 18:40:14,145 INFO L226 Difference]: Without dead ends: 10648 [2021-07-09 18:40:14,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:40:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10648 states. [2021-07-09 18:40:14,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10648 to 7756. [2021-07-09 18:40:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7756 states, 7755 states have (on average 3.752675693101225) internal successors, (29102), 7755 states have internal predecessors, (29102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:14,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7756 states to 7756 states and 29102 transitions. [2021-07-09 18:40:14,313 INFO L78 Accepts]: Start accepts. Automaton has 7756 states and 29102 transitions. Word has length 28 [2021-07-09 18:40:14,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:14,313 INFO L482 AbstractCegarLoop]: Abstraction has 7756 states and 29102 transitions. [2021-07-09 18:40:14,313 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) [2021-07-09 18:40:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 7756 states and 29102 transitions. [2021-07-09 18:40:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:14,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:14,375 INFO L508 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] [2021-07-09 18:40:14,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3939,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:14,576 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:14,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:14,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 85 times [2021-07-09 18:40:14,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:14,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495159492] [2021-07-09 18:40:14,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:14,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:14,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495159492] [2021-07-09 18:40:14,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495159492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:14,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326954450] [2021-07-09 18:40:14,615 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 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 [2021-07-09 18:40:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:14,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:14,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:14,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326954450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:14,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:14,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:40:14,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975074725] [2021-07-09 18:40:14,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:14,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:14,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:14,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:14,694 INFO L87 Difference]: Start difference. First operand 7756 states and 29102 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) [2021-07-09 18:40:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:15,340 INFO L93 Difference]: Finished difference Result 13360 states and 47364 transitions. [2021-07-09 18:40:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:40:15,340 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 [2021-07-09 18:40:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:15,372 INFO L225 Difference]: With dead ends: 13360 [2021-07-09 18:40:15,372 INFO L226 Difference]: Without dead ends: 13348 [2021-07-09 18:40:15,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:40:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13348 states. [2021-07-09 18:40:15,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13348 to 7756. [2021-07-09 18:40:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7756 states, 7755 states have (on average 3.7513862024500324) internal successors, (29092), 7755 states have internal predecessors, (29092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7756 states to 7756 states and 29092 transitions. [2021-07-09 18:40:15,637 INFO L78 Accepts]: Start accepts. Automaton has 7756 states and 29092 transitions. Word has length 28 [2021-07-09 18:40:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:15,637 INFO L482 AbstractCegarLoop]: Abstraction has 7756 states and 29092 transitions. [2021-07-09 18:40:15,637 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) [2021-07-09 18:40:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 7756 states and 29092 transitions. [2021-07-09 18:40:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:15,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:15,650 INFO L508 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] [2021-07-09 18:40:15,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3940,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:15,851 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:15,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:15,851 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 86 times [2021-07-09 18:40:15,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:15,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877058214] [2021-07-09 18:40:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:15,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:15,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877058214] [2021-07-09 18:40:15,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877058214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:15,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463598730] [2021-07-09 18:40:15,890 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 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 [2021-07-09 18:40:15,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:15,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:15,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:15,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:15,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463598730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:15,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:15,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:40:15,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792677040] [2021-07-09 18:40:15,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:15,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:15,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:15,987 INFO L87 Difference]: Start difference. First operand 7756 states and 29092 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) [2021-07-09 18:40:17,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:17,133 INFO L93 Difference]: Finished difference Result 20318 states and 70854 transitions. [2021-07-09 18:40:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:40:17,134 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 [2021-07-09 18:40:17,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:17,188 INFO L225 Difference]: With dead ends: 20318 [2021-07-09 18:40:17,188 INFO L226 Difference]: Without dead ends: 20318 [2021-07-09 18:40:17,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 683.5ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:40:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20318 states. [2021-07-09 18:40:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20318 to 10596. [2021-07-09 18:40:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10596 states, 10595 states have (on average 3.79443133553563) internal successors, (40202), 10595 states have internal predecessors, (40202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10596 states to 10596 states and 40202 transitions. [2021-07-09 18:40:17,605 INFO L78 Accepts]: Start accepts. Automaton has 10596 states and 40202 transitions. Word has length 28 [2021-07-09 18:40:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:17,605 INFO L482 AbstractCegarLoop]: Abstraction has 10596 states and 40202 transitions. [2021-07-09 18:40:17,605 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) [2021-07-09 18:40:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 10596 states and 40202 transitions. [2021-07-09 18:40:17,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:17,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:17,623 INFO L508 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] [2021-07-09 18:40:17,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3941,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:17,824 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:17,824 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 87 times [2021-07-09 18:40:17,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:17,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329855306] [2021-07-09 18:40:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:17,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:17,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329855306] [2021-07-09 18:40:17,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329855306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:17,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606363880] [2021-07-09 18:40:17,866 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 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 [2021-07-09 18:40:17,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:17,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:17,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:17,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:17,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606363880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:17,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:17,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:40:17,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763468383] [2021-07-09 18:40:17,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:17,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:17,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:17,955 INFO L87 Difference]: Start difference. First operand 10596 states and 40202 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) [2021-07-09 18:40:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:19,031 INFO L93 Difference]: Finished difference Result 19544 states and 68833 transitions. [2021-07-09 18:40:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:40:19,032 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 [2021-07-09 18:40:19,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:19,080 INFO L225 Difference]: With dead ends: 19544 [2021-07-09 18:40:19,080 INFO L226 Difference]: Without dead ends: 19532 [2021-07-09 18:40:19,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 647.3ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:40:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19532 states. [2021-07-09 18:40:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19532 to 10410. [2021-07-09 18:40:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10410 states, 10409 states have (on average 3.8004611393985974) internal successors, (39559), 10409 states have internal predecessors, (39559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10410 states to 10410 states and 39559 transitions. [2021-07-09 18:40:19,423 INFO L78 Accepts]: Start accepts. Automaton has 10410 states and 39559 transitions. Word has length 28 [2021-07-09 18:40:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:19,423 INFO L482 AbstractCegarLoop]: Abstraction has 10410 states and 39559 transitions. [2021-07-09 18:40:19,423 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) [2021-07-09 18:40:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 10410 states and 39559 transitions. [2021-07-09 18:40:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:19,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:19,440 INFO L508 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] [2021-07-09 18:40:19,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3942 [2021-07-09 18:40:19,641 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:19,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:19,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 88 times [2021-07-09 18:40:19,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:19,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578677164] [2021-07-09 18:40:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:19,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:19,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578677164] [2021-07-09 18:40:19,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578677164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:19,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524914425] [2021-07-09 18:40:19,680 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 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 [2021-07-09 18:40:19,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:19,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:19,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:19,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:19,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524914425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:19,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:19,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:40:19,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65981164] [2021-07-09 18:40:19,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:19,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:19,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:19,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:19,767 INFO L87 Difference]: Start difference. First operand 10410 states and 39559 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) [2021-07-09 18:40:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:20,785 INFO L93 Difference]: Finished difference Result 19373 states and 68230 transitions. [2021-07-09 18:40:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:40:20,785 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 [2021-07-09 18:40:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:20,834 INFO L225 Difference]: With dead ends: 19373 [2021-07-09 18:40:20,834 INFO L226 Difference]: Without dead ends: 19337 [2021-07-09 18:40:20,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:40:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19337 states. [2021-07-09 18:40:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19337 to 10460. [2021-07-09 18:40:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10460 states, 10459 states have (on average 3.798451094750932) internal successors, (39728), 10459 states have internal predecessors, (39728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10460 states to 10460 states and 39728 transitions. [2021-07-09 18:40:21,164 INFO L78 Accepts]: Start accepts. Automaton has 10460 states and 39728 transitions. Word has length 28 [2021-07-09 18:40:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:21,164 INFO L482 AbstractCegarLoop]: Abstraction has 10460 states and 39728 transitions. [2021-07-09 18:40:21,164 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) [2021-07-09 18:40:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 10460 states and 39728 transitions. [2021-07-09 18:40:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:21,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:21,182 INFO L508 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] [2021-07-09 18:40:21,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3943,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:21,383 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:21,383 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 89 times [2021-07-09 18:40:21,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:21,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437488183] [2021-07-09 18:40:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:21,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:21,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437488183] [2021-07-09 18:40:21,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437488183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:21,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800647517] [2021-07-09 18:40:21,424 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 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 [2021-07-09 18:40:21,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:40:21,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:21,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:21,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:21,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800647517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:21,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:21,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:40:21,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292301963] [2021-07-09 18:40:21,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:21,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:21,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:21,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:21,541 INFO L87 Difference]: Start difference. First operand 10460 states and 39728 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) [2021-07-09 18:40:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:22,973 INFO L93 Difference]: Finished difference Result 19259 states and 67953 transitions. [2021-07-09 18:40:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 18:40:22,973 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 [2021-07-09 18:40:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:23,022 INFO L225 Difference]: With dead ends: 19259 [2021-07-09 18:40:23,022 INFO L226 Difference]: Without dead ends: 19259 [2021-07-09 18:40:23,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 907.0ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:40:23,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19259 states. [2021-07-09 18:40:23,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19259 to 10656. [2021-07-09 18:40:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10656 states, 10655 states have (on average 3.7895823557015484) internal successors, (40378), 10655 states have internal predecessors, (40378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10656 states to 10656 states and 40378 transitions. [2021-07-09 18:40:23,398 INFO L78 Accepts]: Start accepts. Automaton has 10656 states and 40378 transitions. Word has length 28 [2021-07-09 18:40:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:23,398 INFO L482 AbstractCegarLoop]: Abstraction has 10656 states and 40378 transitions. [2021-07-09 18:40:23,398 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) [2021-07-09 18:40:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand 10656 states and 40378 transitions. [2021-07-09 18:40:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:23,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:23,418 INFO L508 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] [2021-07-09 18:40:23,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3944 [2021-07-09 18:40:23,619 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:23,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:23,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 90 times [2021-07-09 18:40:23,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:23,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691807632] [2021-07-09 18:40:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:23,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:23,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691807632] [2021-07-09 18:40:23,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691807632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:23,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702163251] [2021-07-09 18:40:23,671 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 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 [2021-07-09 18:40:23,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:40:23,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:23,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:23,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702163251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:23,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:23,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:40:23,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137540346] [2021-07-09 18:40:23,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:23,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:23,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:23,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:23,791 INFO L87 Difference]: Start difference. First operand 10656 states and 40378 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) [2021-07-09 18:40:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:25,111 INFO L93 Difference]: Finished difference Result 18895 states and 66950 transitions. [2021-07-09 18:40:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:40:25,112 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 [2021-07-09 18:40:25,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:25,165 INFO L225 Difference]: With dead ends: 18895 [2021-07-09 18:40:25,165 INFO L226 Difference]: Without dead ends: 18883 [2021-07-09 18:40:25,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 752.4ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:40:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18883 states. [2021-07-09 18:40:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18883 to 10538. [2021-07-09 18:40:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10538 states, 10537 states have (on average 3.793964126411692) internal successors, (39977), 10537 states have internal predecessors, (39977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10538 states to 10538 states and 39977 transitions. [2021-07-09 18:40:25,523 INFO L78 Accepts]: Start accepts. Automaton has 10538 states and 39977 transitions. Word has length 28 [2021-07-09 18:40:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:25,524 INFO L482 AbstractCegarLoop]: Abstraction has 10538 states and 39977 transitions. [2021-07-09 18:40:25,524 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) [2021-07-09 18:40:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 10538 states and 39977 transitions. [2021-07-09 18:40:25,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:25,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:25,542 INFO L508 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] [2021-07-09 18:40:25,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3945,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:25,745 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 91 times [2021-07-09 18:40:25,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:25,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027128307] [2021-07-09 18:40:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:25,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:25,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027128307] [2021-07-09 18:40:25,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027128307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:25,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543260356] [2021-07-09 18:40:25,785 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 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 [2021-07-09 18:40:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:25,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:25,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:25,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543260356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:25,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:25,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 18:40:25,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074683117] [2021-07-09 18:40:25,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:25,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:25,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:25,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:25,883 INFO L87 Difference]: Start difference. First operand 10538 states and 39977 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) [2021-07-09 18:40:26,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:26,926 INFO L93 Difference]: Finished difference Result 18135 states and 64866 transitions. [2021-07-09 18:40:26,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:40:26,927 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 [2021-07-09 18:40:26,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:26,972 INFO L225 Difference]: With dead ends: 18135 [2021-07-09 18:40:26,973 INFO L226 Difference]: Without dead ends: 18099 [2021-07-09 18:40:26,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 583.2ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:40:26,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18099 states. [2021-07-09 18:40:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18099 to 10562. [2021-07-09 18:40:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10562 states, 10561 states have (on average 3.7929173373733547) internal successors, (40057), 10561 states have internal predecessors, (40057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10562 states to 10562 states and 40057 transitions. [2021-07-09 18:40:27,317 INFO L78 Accepts]: Start accepts. Automaton has 10562 states and 40057 transitions. Word has length 28 [2021-07-09 18:40:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:27,317 INFO L482 AbstractCegarLoop]: Abstraction has 10562 states and 40057 transitions. [2021-07-09 18:40:27,318 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) [2021-07-09 18:40:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 10562 states and 40057 transitions. [2021-07-09 18:40:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:27,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:27,337 INFO L508 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] [2021-07-09 18:40:27,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3946,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:27,537 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:27,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 92 times [2021-07-09 18:40:27,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:27,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551883548] [2021-07-09 18:40:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:27,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:27,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551883548] [2021-07-09 18:40:27,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551883548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:27,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357776395] [2021-07-09 18:40:27,571 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 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 [2021-07-09 18:40:27,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:27,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:27,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:27,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:27,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357776395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:27,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:27,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:27,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497289702] [2021-07-09 18:40:27,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:27,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:27,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:27,693 INFO L87 Difference]: Start difference. First operand 10562 states and 40057 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) [2021-07-09 18:40:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:28,978 INFO L93 Difference]: Finished difference Result 26263 states and 93462 transitions. [2021-07-09 18:40:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:40:28,978 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 [2021-07-09 18:40:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:29,054 INFO L225 Difference]: With dead ends: 26263 [2021-07-09 18:40:29,054 INFO L226 Difference]: Without dead ends: 26263 [2021-07-09 18:40:29,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 743.9ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:40:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26263 states. [2021-07-09 18:40:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26263 to 10852. [2021-07-09 18:40:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10852 states, 10851 states have (on average 3.818173440235923) internal successors, (41431), 10851 states have internal predecessors, (41431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10852 states to 10852 states and 41431 transitions. [2021-07-09 18:40:29,490 INFO L78 Accepts]: Start accepts. Automaton has 10852 states and 41431 transitions. Word has length 28 [2021-07-09 18:40:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:29,490 INFO L482 AbstractCegarLoop]: Abstraction has 10852 states and 41431 transitions. [2021-07-09 18:40:29,490 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) [2021-07-09 18:40:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 10852 states and 41431 transitions. [2021-07-09 18:40:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:29,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:29,509 INFO L508 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] [2021-07-09 18:40:29,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3947 [2021-07-09 18:40:29,710 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:29,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:29,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 93 times [2021-07-09 18:40:29,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:29,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402632535] [2021-07-09 18:40:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:29,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:29,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402632535] [2021-07-09 18:40:29,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402632535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:29,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622019399] [2021-07-09 18:40:29,754 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 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 [2021-07-09 18:40:29,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:40:29,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:29,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:29,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:29,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622019399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:29,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:29,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:29,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341143691] [2021-07-09 18:40:29,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:29,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:29,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:29,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:29,878 INFO L87 Difference]: Start difference. First operand 10852 states and 41431 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) [2021-07-09 18:40:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:31,241 INFO L93 Difference]: Finished difference Result 25703 states and 92092 transitions. [2021-07-09 18:40:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:40:31,242 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 [2021-07-09 18:40:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:31,329 INFO L225 Difference]: With dead ends: 25703 [2021-07-09 18:40:31,329 INFO L226 Difference]: Without dead ends: 25703 [2021-07-09 18:40:31,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 747.4ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:40:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25703 states. [2021-07-09 18:40:31,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25703 to 10754. [2021-07-09 18:40:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10754 states, 10753 states have (on average 3.8055426392634613) internal successors, (40921), 10753 states have internal predecessors, (40921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10754 states to 10754 states and 40921 transitions. [2021-07-09 18:40:31,828 INFO L78 Accepts]: Start accepts. Automaton has 10754 states and 40921 transitions. Word has length 28 [2021-07-09 18:40:31,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:31,828 INFO L482 AbstractCegarLoop]: Abstraction has 10754 states and 40921 transitions. [2021-07-09 18:40:31,828 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) [2021-07-09 18:40:31,828 INFO L276 IsEmpty]: Start isEmpty. Operand 10754 states and 40921 transitions. [2021-07-09 18:40:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:31,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:31,847 INFO L508 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] [2021-07-09 18:40:32,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3948 [2021-07-09 18:40:32,047 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:32,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:32,048 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 94 times [2021-07-09 18:40:32,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:32,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530899513] [2021-07-09 18:40:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:32,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:32,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530899513] [2021-07-09 18:40:32,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530899513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:32,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995934764] [2021-07-09 18:40:32,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:40:32,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:32,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:32,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:32,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:32,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995934764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:32,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:32,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:40:32,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288091098] [2021-07-09 18:40:32,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:32,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:32,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:32,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:32,199 INFO L87 Difference]: Start difference. First operand 10754 states and 40921 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) [2021-07-09 18:40:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:33,057 INFO L93 Difference]: Finished difference Result 20426 states and 73440 transitions. [2021-07-09 18:40:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:40:33,058 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 [2021-07-09 18:40:33,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:33,108 INFO L225 Difference]: With dead ends: 20426 [2021-07-09 18:40:33,108 INFO L226 Difference]: Without dead ends: 20426 [2021-07-09 18:40:33,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:40:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2021-07-09 18:40:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 10763. [2021-07-09 18:40:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10763 states, 10762 states have (on average 3.804497305333581) internal successors, (40944), 10762 states have internal predecessors, (40944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10763 states to 10763 states and 40944 transitions. [2021-07-09 18:40:33,462 INFO L78 Accepts]: Start accepts. Automaton has 10763 states and 40944 transitions. Word has length 28 [2021-07-09 18:40:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:33,462 INFO L482 AbstractCegarLoop]: Abstraction has 10763 states and 40944 transitions. [2021-07-09 18:40:33,462 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) [2021-07-09 18:40:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 10763 states and 40944 transitions. [2021-07-09 18:40:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:33,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:33,480 INFO L508 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] [2021-07-09 18:40:33,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3949,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:33,681 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:33,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:33,681 INFO L82 PathProgramCache]: Analyzing trace with hash -31074195, now seen corresponding path program 95 times [2021-07-09 18:40:33,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:33,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49617286] [2021-07-09 18:40:33,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:33,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:33,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49617286] [2021-07-09 18:40:33,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49617286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:33,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701615817] [2021-07-09 18:40:33,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:40:33,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:40:33,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:33,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:33,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:33,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701615817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:33,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:33,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:40:33,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092434877] [2021-07-09 18:40:33,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:40:33,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:33,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:40:33,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:40:33,788 INFO L87 Difference]: Start difference. First operand 10763 states and 40944 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) [2021-07-09 18:40:34,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:34,165 INFO L93 Difference]: Finished difference Result 12782 states and 46713 transitions. [2021-07-09 18:40:34,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:40:34,165 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 [2021-07-09 18:40:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:34,195 INFO L225 Difference]: With dead ends: 12782 [2021-07-09 18:40:34,195 INFO L226 Difference]: Without dead ends: 12749 [2021-07-09 18:40:34,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:40:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12749 states. [2021-07-09 18:40:34,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12749 to 10707. [2021-07-09 18:40:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10707 states, 10706 states have (on average 3.8048757705959275) internal successors, (40735), 10706 states have internal predecessors, (40735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10707 states to 10707 states and 40735 transitions. [2021-07-09 18:40:34,422 INFO L78 Accepts]: Start accepts. Automaton has 10707 states and 40735 transitions. Word has length 28 [2021-07-09 18:40:34,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:34,422 INFO L482 AbstractCegarLoop]: Abstraction has 10707 states and 40735 transitions. [2021-07-09 18:40:34,422 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) [2021-07-09 18:40:34,422 INFO L276 IsEmpty]: Start isEmpty. Operand 10707 states and 40735 transitions. [2021-07-09 18:40:34,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:34,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:34,440 INFO L508 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] [2021-07-09 18:40:34,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:34,640 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:34,641 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 96 times [2021-07-09 18:40:34,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:34,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445483122] [2021-07-09 18:40:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:34,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:34,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445483122] [2021-07-09 18:40:34,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445483122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:34,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077568957] [2021-07-09 18:40:34,675 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 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 [2021-07-09 18:40:34,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:40:34,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:34,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:34,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077568957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:34,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:34,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:40:34,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381853165] [2021-07-09 18:40:34,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:34,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:34,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:34,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:34,806 INFO L87 Difference]: Start difference. First operand 10707 states and 40735 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) [2021-07-09 18:40:35,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:35,570 INFO L93 Difference]: Finished difference Result 18923 states and 68585 transitions. [2021-07-09 18:40:35,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:40:35,571 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 [2021-07-09 18:40:35,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:35,619 INFO L225 Difference]: With dead ends: 18923 [2021-07-09 18:40:35,619 INFO L226 Difference]: Without dead ends: 18923 [2021-07-09 18:40:35,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 418.8ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:40:35,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18923 states. [2021-07-09 18:40:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18923 to 10719. [2021-07-09 18:40:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10719 states, 10718 states have (on average 3.8041612241089755) internal successors, (40773), 10718 states have internal predecessors, (40773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10719 states to 10719 states and 40773 transitions. [2021-07-09 18:40:35,951 INFO L78 Accepts]: Start accepts. Automaton has 10719 states and 40773 transitions. Word has length 28 [2021-07-09 18:40:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:35,951 INFO L482 AbstractCegarLoop]: Abstraction has 10719 states and 40773 transitions. [2021-07-09 18:40:35,951 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) [2021-07-09 18:40:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 10719 states and 40773 transitions. [2021-07-09 18:40:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:35,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:35,969 INFO L508 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] [2021-07-09 18:40:36,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3951,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:36,170 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:36,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:36,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 97 times [2021-07-09 18:40:36,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:36,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231890683] [2021-07-09 18:40:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:36,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:36,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231890683] [2021-07-09 18:40:36,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231890683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:36,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986386983] [2021-07-09 18:40:36,204 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 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 [2021-07-09 18:40:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:36,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:36,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:36,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986386983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:36,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:36,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:36,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708970060] [2021-07-09 18:40:36,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:36,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:36,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:36,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:36,350 INFO L87 Difference]: Start difference. First operand 10719 states and 40773 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) [2021-07-09 18:40:37,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:37,418 INFO L93 Difference]: Finished difference Result 19527 states and 70320 transitions. [2021-07-09 18:40:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:40:37,418 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 [2021-07-09 18:40:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:37,471 INFO L225 Difference]: With dead ends: 19527 [2021-07-09 18:40:37,471 INFO L226 Difference]: Without dead ends: 19527 [2021-07-09 18:40:37,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 670.0ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:40:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19527 states. [2021-07-09 18:40:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19527 to 10827. [2021-07-09 18:40:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10827 states, 10826 states have (on average 3.797062627009052) internal successors, (41107), 10826 states have internal predecessors, (41107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10827 states to 10827 states and 41107 transitions. [2021-07-09 18:40:37,779 INFO L78 Accepts]: Start accepts. Automaton has 10827 states and 41107 transitions. Word has length 28 [2021-07-09 18:40:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:37,779 INFO L482 AbstractCegarLoop]: Abstraction has 10827 states and 41107 transitions. [2021-07-09 18:40:37,779 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) [2021-07-09 18:40:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 10827 states and 41107 transitions. [2021-07-09 18:40:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:37,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:37,862 INFO L508 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] [2021-07-09 18:40:38,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3952 [2021-07-09 18:40:38,063 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 98 times [2021-07-09 18:40:38,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:38,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914747232] [2021-07-09 18:40:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:38,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:38,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914747232] [2021-07-09 18:40:38,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914747232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:38,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209133022] [2021-07-09 18:40:38,097 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 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 [2021-07-09 18:40:38,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:38,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:38,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:38,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:38,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209133022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:38,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:38,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:40:38,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184178714] [2021-07-09 18:40:38,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:38,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:38,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:38,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:38,216 INFO L87 Difference]: Start difference. First operand 10827 states and 41107 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) [2021-07-09 18:40:39,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:39,166 INFO L93 Difference]: Finished difference Result 19102 states and 69164 transitions. [2021-07-09 18:40:39,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:40:39,166 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 [2021-07-09 18:40:39,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:39,210 INFO L225 Difference]: With dead ends: 19102 [2021-07-09 18:40:39,210 INFO L226 Difference]: Without dead ends: 19098 [2021-07-09 18:40:39,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:40:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19098 states. [2021-07-09 18:40:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19098 to 10753. [2021-07-09 18:40:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10753 states, 10752 states have (on average 3.800967261904762) internal successors, (40868), 10752 states have internal predecessors, (40868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10753 states to 10753 states and 40868 transitions. [2021-07-09 18:40:39,510 INFO L78 Accepts]: Start accepts. Automaton has 10753 states and 40868 transitions. Word has length 28 [2021-07-09 18:40:39,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:39,510 INFO L482 AbstractCegarLoop]: Abstraction has 10753 states and 40868 transitions. [2021-07-09 18:40:39,511 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) [2021-07-09 18:40:39,511 INFO L276 IsEmpty]: Start isEmpty. Operand 10753 states and 40868 transitions. [2021-07-09 18:40:39,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:39,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:39,528 INFO L508 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] [2021-07-09 18:40:39,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3953,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:39,728 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:39,729 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 99 times [2021-07-09 18:40:39,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:39,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323979224] [2021-07-09 18:40:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:39,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:39,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323979224] [2021-07-09 18:40:39,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323979224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:39,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505575380] [2021-07-09 18:40:39,772 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 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 [2021-07-09 18:40:39,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:40:39,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:39,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:39,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:39,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505575380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:39,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:39,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:39,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127368758] [2021-07-09 18:40:39,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:39,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:39,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:39,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:39,891 INFO L87 Difference]: Start difference. First operand 10753 states and 40868 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) [2021-07-09 18:40:41,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:41,066 INFO L93 Difference]: Finished difference Result 18533 states and 66656 transitions. [2021-07-09 18:40:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:40:41,067 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 [2021-07-09 18:40:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:41,114 INFO L225 Difference]: With dead ends: 18533 [2021-07-09 18:40:41,114 INFO L226 Difference]: Without dead ends: 18533 [2021-07-09 18:40:41,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 688.9ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:40:41,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18533 states. [2021-07-09 18:40:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18533 to 10980. [2021-07-09 18:40:41,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 3.8041716003278987) internal successors, (41766), 10979 states have internal predecessors, (41766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 41766 transitions. [2021-07-09 18:40:41,443 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 41766 transitions. Word has length 28 [2021-07-09 18:40:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:41,443 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 41766 transitions. [2021-07-09 18:40:41,443 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) [2021-07-09 18:40:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 41766 transitions. [2021-07-09 18:40:41,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:41,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:41,461 INFO L508 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] [2021-07-09 18:40:41,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3954 [2021-07-09 18:40:41,662 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:41,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 100 times [2021-07-09 18:40:41,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:41,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294604933] [2021-07-09 18:40:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:41,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:41,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294604933] [2021-07-09 18:40:41,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294604933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:41,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860617989] [2021-07-09 18:40:41,701 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 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 [2021-07-09 18:40:41,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:41,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:41,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:41,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:41,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860617989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:41,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:41,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:41,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225951351] [2021-07-09 18:40:41,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:40:41,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:41,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:40:41,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:40:41,807 INFO L87 Difference]: Start difference. First operand 10980 states and 41766 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) [2021-07-09 18:40:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:42,745 INFO L93 Difference]: Finished difference Result 18246 states and 65858 transitions. [2021-07-09 18:40:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:40:42,746 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 [2021-07-09 18:40:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:42,787 INFO L225 Difference]: With dead ends: 18246 [2021-07-09 18:40:42,787 INFO L226 Difference]: Without dead ends: 18234 [2021-07-09 18:40:42,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 549.3ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:40:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18234 states. [2021-07-09 18:40:43,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18234 to 11082. [2021-07-09 18:40:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11082 states, 11081 states have (on average 3.798303402220016) internal successors, (42089), 11081 states have internal predecessors, (42089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11082 states to 11082 states and 42089 transitions. [2021-07-09 18:40:43,074 INFO L78 Accepts]: Start accepts. Automaton has 11082 states and 42089 transitions. Word has length 28 [2021-07-09 18:40:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:43,074 INFO L482 AbstractCegarLoop]: Abstraction has 11082 states and 42089 transitions. [2021-07-09 18:40:43,074 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) [2021-07-09 18:40:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 11082 states and 42089 transitions. [2021-07-09 18:40:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:43,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:43,092 INFO L508 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] [2021-07-09 18:40:43,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3955,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:43,293 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:43,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 72 times [2021-07-09 18:40:43,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:43,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026415267] [2021-07-09 18:40:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:43,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:43,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026415267] [2021-07-09 18:40:43,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026415267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:43,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386822069] [2021-07-09 18:40:43,333 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 [2021-07-09 18:40:43,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:40:43,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:43,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:43,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:43,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386822069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:43,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:43,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:40:43,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335712766] [2021-07-09 18:40:43,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:43,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:43,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:43,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:43,483 INFO L87 Difference]: Start difference. First operand 11082 states and 42089 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) [2021-07-09 18:40:43,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:43,927 INFO L93 Difference]: Finished difference Result 15733 states and 58180 transitions. [2021-07-09 18:40:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:40:43,927 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 [2021-07-09 18:40:43,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:43,964 INFO L225 Difference]: With dead ends: 15733 [2021-07-09 18:40:43,964 INFO L226 Difference]: Without dead ends: 15733 [2021-07-09 18:40:43,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:40:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15733 states. [2021-07-09 18:40:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15733 to 11154. [2021-07-09 18:40:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11154 states, 11153 states have (on average 3.7938671209540034) internal successors, (42313), 11153 states have internal predecessors, (42313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 42313 transitions. [2021-07-09 18:40:44,211 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 42313 transitions. Word has length 28 [2021-07-09 18:40:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:44,211 INFO L482 AbstractCegarLoop]: Abstraction has 11154 states and 42313 transitions. [2021-07-09 18:40:44,211 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) [2021-07-09 18:40:44,211 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 42313 transitions. [2021-07-09 18:40:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:44,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:44,229 INFO L508 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] [2021-07-09 18:40:44,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3956 [2021-07-09 18:40:44,429 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:44,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:44,430 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 73 times [2021-07-09 18:40:44,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:44,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713983186] [2021-07-09 18:40:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:44,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:44,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713983186] [2021-07-09 18:40:44,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713983186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:44,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553513661] [2021-07-09 18:40:44,464 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 [2021-07-09 18:40:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:44,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:44,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:44,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553513661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:44,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:44,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:40:44,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648019693] [2021-07-09 18:40:44,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:44,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:44,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:44,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:44,554 INFO L87 Difference]: Start difference. First operand 11154 states and 42313 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) [2021-07-09 18:40:45,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:45,068 INFO L93 Difference]: Finished difference Result 16710 states and 61024 transitions. [2021-07-09 18:40:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:40:45,068 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 [2021-07-09 18:40:45,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:45,107 INFO L225 Difference]: With dead ends: 16710 [2021-07-09 18:40:45,107 INFO L226 Difference]: Without dead ends: 16710 [2021-07-09 18:40:45,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:40:45,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16710 states. [2021-07-09 18:40:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16710 to 11484. [2021-07-09 18:40:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 3.7768875729339024) internal successors, (43370), 11483 states have internal predecessors, (43370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:45,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 43370 transitions. [2021-07-09 18:40:45,376 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 43370 transitions. Word has length 28 [2021-07-09 18:40:45,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:45,376 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 43370 transitions. [2021-07-09 18:40:45,376 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) [2021-07-09 18:40:45,376 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 43370 transitions. [2021-07-09 18:40:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:45,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:45,395 INFO L508 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] [2021-07-09 18:40:45,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3957,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:45,595 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:45,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:45,596 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 74 times [2021-07-09 18:40:45,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:45,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662578768] [2021-07-09 18:40:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:45,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:45,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662578768] [2021-07-09 18:40:45,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662578768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:45,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593317172] [2021-07-09 18:40:45,629 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 [2021-07-09 18:40:45,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:45,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:45,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593317172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:45,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:45,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:40:45,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060523760] [2021-07-09 18:40:45,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:40:45,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:45,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:40:45,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:40:45,706 INFO L87 Difference]: Start difference. First operand 11484 states and 43370 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) [2021-07-09 18:40:46,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:46,168 INFO L93 Difference]: Finished difference Result 16200 states and 59687 transitions. [2021-07-09 18:40:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:40:46,168 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 [2021-07-09 18:40:46,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:46,204 INFO L225 Difference]: With dead ends: 16200 [2021-07-09 18:40:46,204 INFO L226 Difference]: Without dead ends: 16192 [2021-07-09 18:40:46,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:40:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16192 states. [2021-07-09 18:40:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16192 to 11424. [2021-07-09 18:40:46,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11424 states, 11423 states have (on average 3.7788671977589074) internal successors, (43166), 11423 states have internal predecessors, (43166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11424 states to 11424 states and 43166 transitions. [2021-07-09 18:40:46,473 INFO L78 Accepts]: Start accepts. Automaton has 11424 states and 43166 transitions. Word has length 28 [2021-07-09 18:40:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:46,473 INFO L482 AbstractCegarLoop]: Abstraction has 11424 states and 43166 transitions. [2021-07-09 18:40:46,473 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) [2021-07-09 18:40:46,473 INFO L276 IsEmpty]: Start isEmpty. Operand 11424 states and 43166 transitions. [2021-07-09 18:40:46,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:46,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:46,494 INFO L508 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] [2021-07-09 18:40:46,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3958 [2021-07-09 18:40:46,695 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:46,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:46,695 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 75 times [2021-07-09 18:40:46,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:46,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489873422] [2021-07-09 18:40:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:46,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:46,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489873422] [2021-07-09 18:40:46,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489873422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:46,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666133202] [2021-07-09 18:40:46,734 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 [2021-07-09 18:40:46,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:40:46,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:46,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:46,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:46,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666133202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:46,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:46,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:40:46,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641738041] [2021-07-09 18:40:46,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:46,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:46,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:46,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:46,814 INFO L87 Difference]: Start difference. First operand 11424 states and 43166 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) [2021-07-09 18:40:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:47,274 INFO L93 Difference]: Finished difference Result 16100 states and 59399 transitions. [2021-07-09 18:40:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:40:47,274 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 [2021-07-09 18:40:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:47,312 INFO L225 Difference]: With dead ends: 16100 [2021-07-09 18:40:47,312 INFO L226 Difference]: Without dead ends: 16088 [2021-07-09 18:40:47,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:40:47,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16088 states. [2021-07-09 18:40:47,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16088 to 11406. [2021-07-09 18:40:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11406 states, 11405 states have (on average 3.779307321350285) internal successors, (43103), 11405 states have internal predecessors, (43103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11406 states to 11406 states and 43103 transitions. [2021-07-09 18:40:47,567 INFO L78 Accepts]: Start accepts. Automaton has 11406 states and 43103 transitions. Word has length 28 [2021-07-09 18:40:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:47,567 INFO L482 AbstractCegarLoop]: Abstraction has 11406 states and 43103 transitions. [2021-07-09 18:40:47,568 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) [2021-07-09 18:40:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 11406 states and 43103 transitions. [2021-07-09 18:40:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:47,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:47,587 INFO L508 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] [2021-07-09 18:40:47,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3959 [2021-07-09 18:40:47,787 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:47,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:47,787 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 76 times [2021-07-09 18:40:47,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:47,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886023320] [2021-07-09 18:40:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:47,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:47,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886023320] [2021-07-09 18:40:47,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886023320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:47,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099860456] [2021-07-09 18:40:47,823 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 [2021-07-09 18:40:47,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:47,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:47,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:47,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:47,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099860456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:47,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:47,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:40:47,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846217305] [2021-07-09 18:40:47,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:40:47,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:47,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:40:47,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:40:47,940 INFO L87 Difference]: Start difference. First operand 11406 states and 43103 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) [2021-07-09 18:40:49,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:49,037 INFO L93 Difference]: Finished difference Result 21916 states and 78065 transitions. [2021-07-09 18:40:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:40:49,038 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 [2021-07-09 18:40:49,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:49,090 INFO L225 Difference]: With dead ends: 21916 [2021-07-09 18:40:49,091 INFO L226 Difference]: Without dead ends: 21916 [2021-07-09 18:40:49,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 545.3ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:40:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21916 states. [2021-07-09 18:40:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21916 to 11388. [2021-07-09 18:40:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11388 states, 11387 states have (on average 3.7779924475278825) internal successors, (43020), 11387 states have internal predecessors, (43020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11388 states to 11388 states and 43020 transitions. [2021-07-09 18:40:49,390 INFO L78 Accepts]: Start accepts. Automaton has 11388 states and 43020 transitions. Word has length 28 [2021-07-09 18:40:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:49,390 INFO L482 AbstractCegarLoop]: Abstraction has 11388 states and 43020 transitions. [2021-07-09 18:40:49,390 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) [2021-07-09 18:40:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 11388 states and 43020 transitions. [2021-07-09 18:40:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:49,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:49,408 INFO L508 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] [2021-07-09 18:40:49,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3960,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:49,609 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:49,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1660375731, now seen corresponding path program 101 times [2021-07-09 18:40:49,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:49,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539627695] [2021-07-09 18:40:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:49,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:49,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539627695] [2021-07-09 18:40:49,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539627695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:49,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141270773] [2021-07-09 18:40:49,637 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 [2021-07-09 18:40:49,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:40:49,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:49,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:49,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:49,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141270773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:49,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:49,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:40:49,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247599721] [2021-07-09 18:40:49,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:49,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:49,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:49,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:49,745 INFO L87 Difference]: Start difference. First operand 11388 states and 43020 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) [2021-07-09 18:40:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:50,464 INFO L93 Difference]: Finished difference Result 17700 states and 63852 transitions. [2021-07-09 18:40:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:40:50,464 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 [2021-07-09 18:40:50,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:50,512 INFO L225 Difference]: With dead ends: 17700 [2021-07-09 18:40:50,512 INFO L226 Difference]: Without dead ends: 17684 [2021-07-09 18:40:50,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:40:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17684 states. [2021-07-09 18:40:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17684 to 12696. [2021-07-09 18:40:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12696 states, 12695 states have (on average 3.8450571090980703) internal successors, (48813), 12695 states have internal predecessors, (48813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12696 states to 12696 states and 48813 transitions. [2021-07-09 18:40:50,842 INFO L78 Accepts]: Start accepts. Automaton has 12696 states and 48813 transitions. Word has length 28 [2021-07-09 18:40:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:50,842 INFO L482 AbstractCegarLoop]: Abstraction has 12696 states and 48813 transitions. [2021-07-09 18:40:50,842 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) [2021-07-09 18:40:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 12696 states and 48813 transitions. [2021-07-09 18:40:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:50,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:50,865 INFO L508 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] [2021-07-09 18:40:51,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:51,066 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:51,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:51,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1748793285, now seen corresponding path program 102 times [2021-07-09 18:40:51,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:51,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334345883] [2021-07-09 18:40:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:40:51,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:51,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334345883] [2021-07-09 18:40:51,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334345883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:51,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949360631] [2021-07-09 18:40:51,097 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 [2021-07-09 18:40:51,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:40:51,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:51,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:51,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:51,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949360631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:51,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:51,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-09 18:40:51,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693842769] [2021-07-09 18:40:51,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:51,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:51,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:51,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:51,203 INFO L87 Difference]: Start difference. First operand 12696 states and 48813 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) [2021-07-09 18:40:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:51,958 INFO L93 Difference]: Finished difference Result 17792 states and 64097 transitions. [2021-07-09 18:40:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:40:51,958 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 [2021-07-09 18:40:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:52,000 INFO L225 Difference]: With dead ends: 17792 [2021-07-09 18:40:52,000 INFO L226 Difference]: Without dead ends: 17786 [2021-07-09 18:40:52,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:40:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17786 states. [2021-07-09 18:40:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17786 to 12666. [2021-07-09 18:40:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12666 states, 12665 states have (on average 3.844295302013423) internal successors, (48688), 12665 states have internal predecessors, (48688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12666 states to 12666 states and 48688 transitions. [2021-07-09 18:40:52,320 INFO L78 Accepts]: Start accepts. Automaton has 12666 states and 48688 transitions. Word has length 28 [2021-07-09 18:40:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:52,321 INFO L482 AbstractCegarLoop]: Abstraction has 12666 states and 48688 transitions. [2021-07-09 18:40:52,321 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) [2021-07-09 18:40:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 12666 states and 48688 transitions. [2021-07-09 18:40:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:52,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:52,343 INFO L508 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] [2021-07-09 18:40:52,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:52,544 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:52,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:52,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1491665525, now seen corresponding path program 103 times [2021-07-09 18:40:52,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:52,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26941199] [2021-07-09 18:40:52,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:52,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:52,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26941199] [2021-07-09 18:40:52,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26941199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:52,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910721391] [2021-07-09 18:40:52,570 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 [2021-07-09 18:40:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:52,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:52,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:52,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910721391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:52,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:52,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:40:52,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991304283] [2021-07-09 18:40:52,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:52,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:52,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:52,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:52,668 INFO L87 Difference]: Start difference. First operand 12666 states and 48688 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) [2021-07-09 18:40:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:53,308 INFO L93 Difference]: Finished difference Result 19854 states and 71614 transitions. [2021-07-09 18:40:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:40:53,308 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 [2021-07-09 18:40:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:53,370 INFO L225 Difference]: With dead ends: 19854 [2021-07-09 18:40:53,370 INFO L226 Difference]: Without dead ends: 19838 [2021-07-09 18:40:53,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:40:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19838 states. [2021-07-09 18:40:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19838 to 12721. [2021-07-09 18:40:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12721 states, 12720 states have (on average 3.8488207547169813) internal successors, (48957), 12720 states have internal predecessors, (48957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12721 states to 12721 states and 48957 transitions. [2021-07-09 18:40:53,723 INFO L78 Accepts]: Start accepts. Automaton has 12721 states and 48957 transitions. Word has length 28 [2021-07-09 18:40:53,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:53,723 INFO L482 AbstractCegarLoop]: Abstraction has 12721 states and 48957 transitions. [2021-07-09 18:40:53,723 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) [2021-07-09 18:40:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 12721 states and 48957 transitions. [2021-07-09 18:40:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:53,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:53,746 INFO L508 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] [2021-07-09 18:40:53,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3963,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:53,946 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:53,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:53,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 104 times [2021-07-09 18:40:53,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:53,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288659700] [2021-07-09 18:40:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:54,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:54,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288659700] [2021-07-09 18:40:54,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288659700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:54,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155342121] [2021-07-09 18:40:54,061 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 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 [2021-07-09 18:40:54,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:54,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:54,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:54,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:54,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155342121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:54,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:54,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-09 18:40:54,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101781667] [2021-07-09 18:40:54,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:54,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:54,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:54,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:54,165 INFO L87 Difference]: Start difference. First operand 12721 states and 48957 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) [2021-07-09 18:40:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:54,868 INFO L93 Difference]: Finished difference Result 20992 states and 75172 transitions. [2021-07-09 18:40:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:40:54,869 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 [2021-07-09 18:40:54,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:54,930 INFO L225 Difference]: With dead ends: 20992 [2021-07-09 18:40:54,930 INFO L226 Difference]: Without dead ends: 20992 [2021-07-09 18:40:54,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 474.8ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:40:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20992 states. [2021-07-09 18:40:55,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20992 to 12737. [2021-07-09 18:40:55,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12737 states, 12736 states have (on average 3.845791457286432) internal successors, (48980), 12736 states have internal predecessors, (48980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12737 states to 12737 states and 48980 transitions. [2021-07-09 18:40:55,349 INFO L78 Accepts]: Start accepts. Automaton has 12737 states and 48980 transitions. Word has length 28 [2021-07-09 18:40:55,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:55,349 INFO L482 AbstractCegarLoop]: Abstraction has 12737 states and 48980 transitions. [2021-07-09 18:40:55,349 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) [2021-07-09 18:40:55,349 INFO L276 IsEmpty]: Start isEmpty. Operand 12737 states and 48980 transitions. [2021-07-09 18:40:55,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:55,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:55,374 INFO L508 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] [2021-07-09 18:40:55,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3964,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:55,577 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:55,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:55,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 77 times [2021-07-09 18:40:55,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:55,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855700547] [2021-07-09 18:40:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:55,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:55,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855700547] [2021-07-09 18:40:55,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855700547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:55,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966688208] [2021-07-09 18:40:55,610 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 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 [2021-07-09 18:40:55,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:40:55,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:55,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:40:55,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:55,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966688208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:55,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:55,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:40:55,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527081081] [2021-07-09 18:40:55,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:40:55,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:55,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:40:55,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:40:55,709 INFO L87 Difference]: Start difference. First operand 12737 states and 48980 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) [2021-07-09 18:40:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:56,654 INFO L93 Difference]: Finished difference Result 22133 states and 81225 transitions. [2021-07-09 18:40:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:40:56,655 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 [2021-07-09 18:40:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:56,719 INFO L225 Difference]: With dead ends: 22133 [2021-07-09 18:40:56,719 INFO L226 Difference]: Without dead ends: 22129 [2021-07-09 18:40:56,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:40:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22129 states. [2021-07-09 18:40:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22129 to 12991. [2021-07-09 18:40:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12990 states have (on average 3.8354888375673597) internal successors, (49823), 12990 states have internal predecessors, (49823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 49823 transitions. [2021-07-09 18:40:57,168 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 49823 transitions. Word has length 28 [2021-07-09 18:40:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:57,168 INFO L482 AbstractCegarLoop]: Abstraction has 12991 states and 49823 transitions. [2021-07-09 18:40:57,168 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) [2021-07-09 18:40:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 49823 transitions. [2021-07-09 18:40:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:57,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:57,196 INFO L508 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] [2021-07-09 18:40:57,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3965,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:57,396 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:57,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:57,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1750460849, now seen corresponding path program 105 times [2021-07-09 18:40:57,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:57,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343253153] [2021-07-09 18:40:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:57,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343253153] [2021-07-09 18:40:57,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343253153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:57,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616159132] [2021-07-09 18:40:57,428 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 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 [2021-07-09 18:40:57,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:40:57,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:57,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:57,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616159132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:57,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:57,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:40:57,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272057146] [2021-07-09 18:40:57,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:57,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:57,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:57,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:57,518 INFO L87 Difference]: Start difference. First operand 12991 states and 49823 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) [2021-07-09 18:40:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:58,172 INFO L93 Difference]: Finished difference Result 18794 states and 68812 transitions. [2021-07-09 18:40:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:40:58,172 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 [2021-07-09 18:40:58,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:58,221 INFO L225 Difference]: With dead ends: 18794 [2021-07-09 18:40:58,221 INFO L226 Difference]: Without dead ends: 18768 [2021-07-09 18:40:58,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:40:58,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18768 states. [2021-07-09 18:40:58,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18768 to 13271. [2021-07-09 18:40:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 3.853654860587792) internal successors, (51138), 13270 states have internal predecessors, (51138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 51138 transitions. [2021-07-09 18:40:58,571 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 51138 transitions. Word has length 28 [2021-07-09 18:40:58,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:58,571 INFO L482 AbstractCegarLoop]: Abstraction has 13271 states and 51138 transitions. [2021-07-09 18:40:58,571 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) [2021-07-09 18:40:58,571 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 51138 transitions. [2021-07-09 18:40:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:58,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:58,596 INFO L508 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] [2021-07-09 18:40:58,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3966 [2021-07-09 18:40:58,796 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:58,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:58,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 106 times [2021-07-09 18:40:58,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:58,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674151527] [2021-07-09 18:40:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:58,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:58,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674151527] [2021-07-09 18:40:58,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674151527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:58,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014181676] [2021-07-09 18:40:58,833 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 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 [2021-07-09 18:40:58,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:58,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:58,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:40:58,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:58,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014181676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:58,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:58,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:40:58,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190949702] [2021-07-09 18:40:58,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:40:58,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:58,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:40:58,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:40:58,929 INFO L87 Difference]: Start difference. First operand 13271 states and 51138 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) [2021-07-09 18:40:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:59,707 INFO L93 Difference]: Finished difference Result 18772 states and 67861 transitions. [2021-07-09 18:40:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:40:59,708 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 [2021-07-09 18:40:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:59,756 INFO L225 Difference]: With dead ends: 18772 [2021-07-09 18:40:59,756 INFO L226 Difference]: Without dead ends: 18772 [2021-07-09 18:40:59,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 452.4ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:40:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18772 states. [2021-07-09 18:41:00,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18772 to 13226. [2021-07-09 18:41:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13226 states, 13225 states have (on average 3.8455198487712665) internal successors, (50857), 13225 states have internal predecessors, (50857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13226 states to 13226 states and 50857 transitions. [2021-07-09 18:41:00,086 INFO L78 Accepts]: Start accepts. Automaton has 13226 states and 50857 transitions. Word has length 28 [2021-07-09 18:41:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:00,086 INFO L482 AbstractCegarLoop]: Abstraction has 13226 states and 50857 transitions. [2021-07-09 18:41:00,086 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) [2021-07-09 18:41:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 13226 states and 50857 transitions. [2021-07-09 18:41:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:00,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:00,109 INFO L508 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] [2021-07-09 18:41:00,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3967,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:00,310 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:00,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:00,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1518971225, now seen corresponding path program 107 times [2021-07-09 18:41:00,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:00,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426745493] [2021-07-09 18:41:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:00,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:00,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426745493] [2021-07-09 18:41:00,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426745493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:00,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638166507] [2021-07-09 18:41:00,343 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 [2021-07-09 18:41:00,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:41:00,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:00,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:00,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:00,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638166507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:00,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:00,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:41:00,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645541514] [2021-07-09 18:41:00,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:00,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:00,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:00,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:00,445 INFO L87 Difference]: Start difference. First operand 13226 states and 50857 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) [2021-07-09 18:41:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:01,128 INFO L93 Difference]: Finished difference Result 20120 states and 73134 transitions. [2021-07-09 18:41:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:41:01,129 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 [2021-07-09 18:41:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:01,183 INFO L225 Difference]: With dead ends: 20120 [2021-07-09 18:41:01,183 INFO L226 Difference]: Without dead ends: 20120 [2021-07-09 18:41:01,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:41:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20120 states. [2021-07-09 18:41:01,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20120 to 13939. [2021-07-09 18:41:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13939 states, 13938 states have (on average 3.8318266609269624) internal successors, (53408), 13938 states have internal predecessors, (53408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 53408 transitions. [2021-07-09 18:41:01,571 INFO L78 Accepts]: Start accepts. Automaton has 13939 states and 53408 transitions. Word has length 28 [2021-07-09 18:41:01,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:01,571 INFO L482 AbstractCegarLoop]: Abstraction has 13939 states and 53408 transitions. [2021-07-09 18:41:01,571 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) [2021-07-09 18:41:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand 13939 states and 53408 transitions. [2021-07-09 18:41:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:01,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:01,597 INFO L508 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] [2021-07-09 18:41:01,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3968 [2021-07-09 18:41:01,797 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:01,797 INFO L82 PathProgramCache]: Analyzing trace with hash -629568261, now seen corresponding path program 108 times [2021-07-09 18:41:01,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:01,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040543881] [2021-07-09 18:41:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:01,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:01,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040543881] [2021-07-09 18:41:01,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040543881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:01,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005536499] [2021-07-09 18:41:01,829 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 [2021-07-09 18:41:01,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:41:01,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:01,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:01,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:01,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005536499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:01,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:01,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:41:01,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083565812] [2021-07-09 18:41:01,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:01,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:01,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:01,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:01,929 INFO L87 Difference]: Start difference. First operand 13939 states and 53408 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) [2021-07-09 18:41:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:02,805 INFO L93 Difference]: Finished difference Result 22535 states and 80778 transitions. [2021-07-09 18:41:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:41:02,805 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 [2021-07-09 18:41:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:02,865 INFO L225 Difference]: With dead ends: 22535 [2021-07-09 18:41:02,865 INFO L226 Difference]: Without dead ends: 22535 [2021-07-09 18:41:02,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:41:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22535 states. [2021-07-09 18:41:03,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22535 to 14169. [2021-07-09 18:41:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14169 states, 14168 states have (on average 3.8435206098249575) internal successors, (54455), 14168 states have internal predecessors, (54455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:03,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14169 states to 14169 states and 54455 transitions. [2021-07-09 18:41:03,232 INFO L78 Accepts]: Start accepts. Automaton has 14169 states and 54455 transitions. Word has length 28 [2021-07-09 18:41:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:03,233 INFO L482 AbstractCegarLoop]: Abstraction has 14169 states and 54455 transitions. [2021-07-09 18:41:03,233 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) [2021-07-09 18:41:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 14169 states and 54455 transitions. [2021-07-09 18:41:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:03,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:03,259 INFO L508 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] [2021-07-09 18:41:03,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3969,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:03,460 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:03,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 78 times [2021-07-09 18:41:03,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:03,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985480093] [2021-07-09 18:41:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:03,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:03,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985480093] [2021-07-09 18:41:03,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985480093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:03,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627681902] [2021-07-09 18:41:03,496 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 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 [2021-07-09 18:41:03,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:41:03,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:03,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:03,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:03,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627681902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:03,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:03,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:41:03,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588633388] [2021-07-09 18:41:03,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:03,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:03,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:03,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:03,620 INFO L87 Difference]: Start difference. First operand 14169 states and 54455 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) [2021-07-09 18:41:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:05,195 INFO L93 Difference]: Finished difference Result 39203 states and 140890 transitions. [2021-07-09 18:41:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:41:05,195 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 [2021-07-09 18:41:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:05,307 INFO L225 Difference]: With dead ends: 39203 [2021-07-09 18:41:05,308 INFO L226 Difference]: Without dead ends: 39203 [2021-07-09 18:41:05,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 881.0ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:41:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39203 states. [2021-07-09 18:41:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39203 to 15405. [2021-07-09 18:41:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15405 states, 15404 states have (on average 3.890028564009348) internal successors, (59922), 15404 states have internal predecessors, (59922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15405 states to 15405 states and 59922 transitions. [2021-07-09 18:41:05,937 INFO L78 Accepts]: Start accepts. Automaton has 15405 states and 59922 transitions. Word has length 28 [2021-07-09 18:41:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:05,937 INFO L482 AbstractCegarLoop]: Abstraction has 15405 states and 59922 transitions. [2021-07-09 18:41:05,937 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) [2021-07-09 18:41:05,937 INFO L276 IsEmpty]: Start isEmpty. Operand 15405 states and 59922 transitions. [2021-07-09 18:41:05,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:05,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:05,964 INFO L508 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] [2021-07-09 18:41:06,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:06,164 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:06,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 79 times [2021-07-09 18:41:06,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:06,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123119459] [2021-07-09 18:41:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:06,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:06,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123119459] [2021-07-09 18:41:06,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123119459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:06,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869033880] [2021-07-09 18:41:06,198 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 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 [2021-07-09 18:41:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:06,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:06,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:06,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869033880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:06,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:06,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:41:06,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778444916] [2021-07-09 18:41:06,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:06,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:06,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:06,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:06,320 INFO L87 Difference]: Start difference. First operand 15405 states and 59922 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) [2021-07-09 18:41:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:07,885 INFO L93 Difference]: Finished difference Result 38231 states and 138333 transitions. [2021-07-09 18:41:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:41:07,885 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 [2021-07-09 18:41:07,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:07,994 INFO L225 Difference]: With dead ends: 38231 [2021-07-09 18:41:07,994 INFO L226 Difference]: Without dead ends: 38231 [2021-07-09 18:41:07,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 888.9ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:41:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38231 states. [2021-07-09 18:41:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38231 to 15379. [2021-07-09 18:41:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15379 states, 15378 states have (on average 3.886461178306672) internal successors, (59766), 15378 states have internal predecessors, (59766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15379 states to 15379 states and 59766 transitions. [2021-07-09 18:41:08,594 INFO L78 Accepts]: Start accepts. Automaton has 15379 states and 59766 transitions. Word has length 28 [2021-07-09 18:41:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:08,594 INFO L482 AbstractCegarLoop]: Abstraction has 15379 states and 59766 transitions. [2021-07-09 18:41:08,594 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) [2021-07-09 18:41:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 15379 states and 59766 transitions. [2021-07-09 18:41:08,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:08,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:08,620 INFO L508 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] [2021-07-09 18:41:08,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:08,821 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:08,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 109 times [2021-07-09 18:41:08,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:08,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184512705] [2021-07-09 18:41:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:08,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:08,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184512705] [2021-07-09 18:41:08,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184512705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:08,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569913340] [2021-07-09 18:41:08,865 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 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 [2021-07-09 18:41:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:08,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:08,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:08,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569913340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:08,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:08,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:41:08,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396452996] [2021-07-09 18:41:08,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:08,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:08,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:08,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:08,941 INFO L87 Difference]: Start difference. First operand 15379 states and 59766 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) [2021-07-09 18:41:09,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:09,234 INFO L93 Difference]: Finished difference Result 23740 states and 90889 transitions. [2021-07-09 18:41:09,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:41:09,234 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 [2021-07-09 18:41:09,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:09,300 INFO L225 Difference]: With dead ends: 23740 [2021-07-09 18:41:09,300 INFO L226 Difference]: Without dead ends: 23693 [2021-07-09 18:41:09,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:09,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23693 states. [2021-07-09 18:41:09,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23693 to 20498. [2021-07-09 18:41:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20498 states, 20497 states have (on average 3.9016441430453237) internal successors, (79972), 20497 states have internal predecessors, (79972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20498 states to 20498 states and 79972 transitions. [2021-07-09 18:41:09,817 INFO L78 Accepts]: Start accepts. Automaton has 20498 states and 79972 transitions. Word has length 28 [2021-07-09 18:41:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:09,817 INFO L482 AbstractCegarLoop]: Abstraction has 20498 states and 79972 transitions. [2021-07-09 18:41:09,817 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) [2021-07-09 18:41:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 20498 states and 79972 transitions. [2021-07-09 18:41:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:09,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:09,853 INFO L508 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] [2021-07-09 18:41:10,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3972,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:10,057 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:10,057 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 110 times [2021-07-09 18:41:10,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:10,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978838411] [2021-07-09 18:41:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:10,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:10,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978838411] [2021-07-09 18:41:10,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978838411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:10,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099586510] [2021-07-09 18:41:10,085 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 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 [2021-07-09 18:41:10,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:10,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:10,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:10,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:10,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099586510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:10,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:10,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:41:10,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481782081] [2021-07-09 18:41:10,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:10,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:10,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:10,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:10,168 INFO L87 Difference]: Start difference. First operand 20498 states and 79972 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) [2021-07-09 18:41:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:10,445 INFO L93 Difference]: Finished difference Result 23252 states and 88342 transitions. [2021-07-09 18:41:10,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:41:10,446 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 [2021-07-09 18:41:10,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:10,509 INFO L225 Difference]: With dead ends: 23252 [2021-07-09 18:41:10,509 INFO L226 Difference]: Without dead ends: 23252 [2021-07-09 18:41:10,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23252 states. [2021-07-09 18:41:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23252 to 20001. [2021-07-09 18:41:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20001 states, 20000 states have (on average 3.89) internal successors, (77800), 20000 states have internal predecessors, (77800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 77800 transitions. [2021-07-09 18:41:10,968 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 77800 transitions. Word has length 28 [2021-07-09 18:41:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:10,968 INFO L482 AbstractCegarLoop]: Abstraction has 20001 states and 77800 transitions. [2021-07-09 18:41:10,968 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) [2021-07-09 18:41:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 77800 transitions. [2021-07-09 18:41:11,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:11,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:11,005 INFO L508 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] [2021-07-09 18:41:11,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3973 [2021-07-09 18:41:11,213 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:11,213 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 111 times [2021-07-09 18:41:11,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:11,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594847282] [2021-07-09 18:41:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:11,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:11,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594847282] [2021-07-09 18:41:11,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594847282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:11,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318309066] [2021-07-09 18:41:11,249 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 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 [2021-07-09 18:41:11,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:41:11,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:11,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:11,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:11,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318309066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:11,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:11,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 18:41:11,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962321277] [2021-07-09 18:41:11,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:41:11,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:11,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:41:11,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:41:11,358 INFO L87 Difference]: Start difference. First operand 20001 states and 77800 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) [2021-07-09 18:41:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:12,325 INFO L93 Difference]: Finished difference Result 31840 states and 117907 transitions. [2021-07-09 18:41:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:41:12,326 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 [2021-07-09 18:41:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:12,413 INFO L225 Difference]: With dead ends: 31840 [2021-07-09 18:41:12,413 INFO L226 Difference]: Without dead ends: 31840 [2021-07-09 18:41:12,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 535.7ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:41:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31840 states. [2021-07-09 18:41:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31840 to 20067. [2021-07-09 18:41:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20067 states, 20066 states have (on average 3.888069371075451) internal successors, (78018), 20066 states have internal predecessors, (78018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20067 states to 20067 states and 78018 transitions. [2021-07-09 18:41:12,950 INFO L78 Accepts]: Start accepts. Automaton has 20067 states and 78018 transitions. Word has length 28 [2021-07-09 18:41:12,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:12,951 INFO L482 AbstractCegarLoop]: Abstraction has 20067 states and 78018 transitions. [2021-07-09 18:41:12,951 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) [2021-07-09 18:41:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 20067 states and 78018 transitions. [2021-07-09 18:41:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:12,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:12,987 INFO L508 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] [2021-07-09 18:41:13,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3974,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:13,187 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:13,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 112 times [2021-07-09 18:41:13,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:13,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184747034] [2021-07-09 18:41:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:13,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:13,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184747034] [2021-07-09 18:41:13,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184747034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:13,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471646580] [2021-07-09 18:41:13,225 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 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 [2021-07-09 18:41:13,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:13,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:13,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471646580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:13,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:13,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:41:13,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990486831] [2021-07-09 18:41:13,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:13,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:13,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:13,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:13,344 INFO L87 Difference]: Start difference. First operand 20067 states and 78018 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) [2021-07-09 18:41:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:14,832 INFO L93 Difference]: Finished difference Result 40672 states and 148990 transitions. [2021-07-09 18:41:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:41:14,833 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 [2021-07-09 18:41:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:14,958 INFO L225 Difference]: With dead ends: 40672 [2021-07-09 18:41:14,958 INFO L226 Difference]: Without dead ends: 40672 [2021-07-09 18:41:14,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 846.0ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:41:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40672 states. [2021-07-09 18:41:15,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40672 to 20072. [2021-07-09 18:41:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20072 states, 20071 states have (on average 3.8901400029893876) internal successors, (78079), 20071 states have internal predecessors, (78079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20072 states to 20072 states and 78079 transitions. [2021-07-09 18:41:15,642 INFO L78 Accepts]: Start accepts. Automaton has 20072 states and 78079 transitions. Word has length 28 [2021-07-09 18:41:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:15,642 INFO L482 AbstractCegarLoop]: Abstraction has 20072 states and 78079 transitions. [2021-07-09 18:41:15,642 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) [2021-07-09 18:41:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 20072 states and 78079 transitions. [2021-07-09 18:41:15,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:15,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:15,678 INFO L508 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] [2021-07-09 18:41:15,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3975,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:15,878 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 113 times [2021-07-09 18:41:15,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:15,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624287927] [2021-07-09 18:41:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:15,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:15,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624287927] [2021-07-09 18:41:15,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624287927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:15,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462620589] [2021-07-09 18:41:15,915 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 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 [2021-07-09 18:41:15,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:41:15,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:15,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:15,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:16,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462620589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:16,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:16,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:41:16,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277711389] [2021-07-09 18:41:16,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:16,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:16,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:16,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:16,037 INFO L87 Difference]: Start difference. First operand 20072 states and 78079 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) [2021-07-09 18:41:17,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:17,529 INFO L93 Difference]: Finished difference Result 40237 states and 148140 transitions. [2021-07-09 18:41:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 18:41:17,530 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 [2021-07-09 18:41:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:17,660 INFO L225 Difference]: With dead ends: 40237 [2021-07-09 18:41:17,660 INFO L226 Difference]: Without dead ends: 40237 [2021-07-09 18:41:17,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 839.9ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:41:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40237 states. [2021-07-09 18:41:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40237 to 19860. [2021-07-09 18:41:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19860 states, 19859 states have (on average 3.8822700035248503) internal successors, (77098), 19859 states have internal predecessors, (77098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19860 states to 19860 states and 77098 transitions. [2021-07-09 18:41:18,360 INFO L78 Accepts]: Start accepts. Automaton has 19860 states and 77098 transitions. Word has length 28 [2021-07-09 18:41:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:18,360 INFO L482 AbstractCegarLoop]: Abstraction has 19860 states and 77098 transitions. [2021-07-09 18:41:18,360 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) [2021-07-09 18:41:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 19860 states and 77098 transitions. [2021-07-09 18:41:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:18,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:18,396 INFO L508 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] [2021-07-09 18:41:18,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3976 [2021-07-09 18:41:18,596 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:18,596 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 114 times [2021-07-09 18:41:18,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:18,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266288952] [2021-07-09 18:41:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:18,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:18,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266288952] [2021-07-09 18:41:18,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266288952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:18,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766190206] [2021-07-09 18:41:18,625 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 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 [2021-07-09 18:41:18,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:18,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:18,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:18,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:41:18,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766190206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:18,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:18,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:41:18,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915695914] [2021-07-09 18:41:18,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:18,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:18,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:18,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:18,704 INFO L87 Difference]: Start difference. First operand 19860 states and 77098 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) [2021-07-09 18:41:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:18,993 INFO L93 Difference]: Finished difference Result 29387 states and 109674 transitions. [2021-07-09 18:41:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:41:18,993 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 [2021-07-09 18:41:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:19,078 INFO L225 Difference]: With dead ends: 29387 [2021-07-09 18:41:19,078 INFO L226 Difference]: Without dead ends: 29370 [2021-07-09 18:41:19,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:19,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29370 states. [2021-07-09 18:41:19,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29370 to 20128. [2021-07-09 18:41:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20128 states, 20127 states have (on average 3.887812391315149) internal successors, (78250), 20127 states have internal predecessors, (78250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20128 states to 20128 states and 78250 transitions. [2021-07-09 18:41:19,672 INFO L78 Accepts]: Start accepts. Automaton has 20128 states and 78250 transitions. Word has length 28 [2021-07-09 18:41:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:19,672 INFO L482 AbstractCegarLoop]: Abstraction has 20128 states and 78250 transitions. [2021-07-09 18:41:19,672 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) [2021-07-09 18:41:19,672 INFO L276 IsEmpty]: Start isEmpty. Operand 20128 states and 78250 transitions. [2021-07-09 18:41:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:19,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:19,707 INFO L508 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] [2021-07-09 18:41:19,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3977,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:19,907 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:19,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:19,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 115 times [2021-07-09 18:41:19,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:19,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745799487] [2021-07-09 18:41:19,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:19,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:19,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745799487] [2021-07-09 18:41:19,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745799487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:19,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842062991] [2021-07-09 18:41:19,938 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 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 [2021-07-09 18:41:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:19,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:19,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:41:20,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842062991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:20,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:20,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:41:20,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045053863] [2021-07-09 18:41:20,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:20,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:20,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:20,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:20,021 INFO L87 Difference]: Start difference. First operand 20128 states and 78250 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) [2021-07-09 18:41:20,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:20,317 INFO L93 Difference]: Finished difference Result 31182 states and 115264 transitions. [2021-07-09 18:41:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:41:20,317 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 [2021-07-09 18:41:20,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:20,413 INFO L225 Difference]: With dead ends: 31182 [2021-07-09 18:41:20,413 INFO L226 Difference]: Without dead ends: 31182 [2021-07-09 18:41:20,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:41:20,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31182 states. [2021-07-09 18:41:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31182 to 19797. [2021-07-09 18:41:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19797 states, 19796 states have (on average 3.8727015558698725) internal successors, (76664), 19796 states have internal predecessors, (76664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19797 states to 19797 states and 76664 transitions. [2021-07-09 18:41:21,121 INFO L78 Accepts]: Start accepts. Automaton has 19797 states and 76664 transitions. Word has length 28 [2021-07-09 18:41:21,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:21,122 INFO L482 AbstractCegarLoop]: Abstraction has 19797 states and 76664 transitions. [2021-07-09 18:41:21,122 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) [2021-07-09 18:41:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 19797 states and 76664 transitions. [2021-07-09 18:41:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:21,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:21,156 INFO L508 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] [2021-07-09 18:41:21,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3978 [2021-07-09 18:41:21,356 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 116 times [2021-07-09 18:41:21,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:21,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103212861] [2021-07-09 18:41:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:21,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:21,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103212861] [2021-07-09 18:41:21,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103212861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:21,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208532114] [2021-07-09 18:41:21,527 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 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 [2021-07-09 18:41:21,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:21,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:21,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:21,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:21,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208532114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:21,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:21,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:41:21,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545338758] [2021-07-09 18:41:21,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:21,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:21,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:21,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:21,623 INFO L87 Difference]: Start difference. First operand 19797 states and 76664 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) [2021-07-09 18:41:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:22,439 INFO L93 Difference]: Finished difference Result 29369 states and 109123 transitions. [2021-07-09 18:41:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:41:22,440 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 [2021-07-09 18:41:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:22,598 INFO L225 Difference]: With dead ends: 29369 [2021-07-09 18:41:22,598 INFO L226 Difference]: Without dead ends: 29369 [2021-07-09 18:41:22,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 529.8ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:41:22,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29369 states. [2021-07-09 18:41:23,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29369 to 19845. [2021-07-09 18:41:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19845 states, 19844 states have (on average 3.871497681918968) internal successors, (76826), 19844 states have internal predecessors, (76826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19845 states to 19845 states and 76826 transitions. [2021-07-09 18:41:23,154 INFO L78 Accepts]: Start accepts. Automaton has 19845 states and 76826 transitions. Word has length 28 [2021-07-09 18:41:23,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:23,154 INFO L482 AbstractCegarLoop]: Abstraction has 19845 states and 76826 transitions. [2021-07-09 18:41:23,154 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) [2021-07-09 18:41:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 19845 states and 76826 transitions. [2021-07-09 18:41:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:23,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:23,187 INFO L508 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] [2021-07-09 18:41:23,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3979,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:23,388 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:23,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 117 times [2021-07-09 18:41:23,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:23,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584323395] [2021-07-09 18:41:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:23,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:23,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584323395] [2021-07-09 18:41:23,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584323395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:23,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217736232] [2021-07-09 18:41:23,424 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 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 [2021-07-09 18:41:23,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:41:23,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:23,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:23,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:23,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217736232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:23,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:23,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:41:23,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297192725] [2021-07-09 18:41:23,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:23,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:23,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:23,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:23,521 INFO L87 Difference]: Start difference. First operand 19845 states and 76826 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) [2021-07-09 18:41:24,251 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-09 18:41:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:24,678 INFO L93 Difference]: Finished difference Result 30894 states and 113497 transitions. [2021-07-09 18:41:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:41:24,678 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 [2021-07-09 18:41:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:24,793 INFO L225 Difference]: With dead ends: 30894 [2021-07-09 18:41:24,793 INFO L226 Difference]: Without dead ends: 30894 [2021-07-09 18:41:24,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 645.4ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:41:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30894 states. [2021-07-09 18:41:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30894 to 20391. [2021-07-09 18:41:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20391 states, 20390 states have (on average 3.8505640019617458) internal successors, (78513), 20390 states have internal predecessors, (78513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20391 states to 20391 states and 78513 transitions. [2021-07-09 18:41:25,531 INFO L78 Accepts]: Start accepts. Automaton has 20391 states and 78513 transitions. Word has length 28 [2021-07-09 18:41:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:25,531 INFO L482 AbstractCegarLoop]: Abstraction has 20391 states and 78513 transitions. [2021-07-09 18:41:25,531 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) [2021-07-09 18:41:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 20391 states and 78513 transitions. [2021-07-09 18:41:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:25,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:25,565 INFO L508 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] [2021-07-09 18:41:25,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3980 [2021-07-09 18:41:25,766 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:25,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:25,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 118 times [2021-07-09 18:41:25,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:25,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455614328] [2021-07-09 18:41:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:25,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:25,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455614328] [2021-07-09 18:41:25,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455614328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:25,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183032642] [2021-07-09 18:41:25,803 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 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 [2021-07-09 18:41:25,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:25,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:25,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:25,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183032642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:25,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:25,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:41:25,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415688117] [2021-07-09 18:41:25,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:25,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:25,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:25,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:25,903 INFO L87 Difference]: Start difference. First operand 20391 states and 78513 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) [2021-07-09 18:41:26,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:26,854 INFO L93 Difference]: Finished difference Result 30020 states and 111194 transitions. [2021-07-09 18:41:26,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:41:26,855 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 [2021-07-09 18:41:26,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:26,943 INFO L225 Difference]: With dead ends: 30020 [2021-07-09 18:41:26,944 INFO L226 Difference]: Without dead ends: 30016 [2021-07-09 18:41:26,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 447.1ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:41:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30016 states. [2021-07-09 18:41:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30016 to 20283. [2021-07-09 18:41:27,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20283 states, 20282 states have (on average 3.8532196035893898) internal successors, (78151), 20282 states have internal predecessors, (78151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 78151 transitions. [2021-07-09 18:41:27,549 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 78151 transitions. Word has length 28 [2021-07-09 18:41:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:27,549 INFO L482 AbstractCegarLoop]: Abstraction has 20283 states and 78151 transitions. [2021-07-09 18:41:27,549 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) [2021-07-09 18:41:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 78151 transitions. [2021-07-09 18:41:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:27,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:27,585 INFO L508 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] [2021-07-09 18:41:27,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:27,785 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:27,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:27,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1066349071, now seen corresponding path program 119 times [2021-07-09 18:41:27,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:27,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141461534] [2021-07-09 18:41:27,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:27,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:27,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141461534] [2021-07-09 18:41:27,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141461534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:27,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146245967] [2021-07-09 18:41:27,813 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 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 [2021-07-09 18:41:27,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:27,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:27,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:27,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:41:27,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146245967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:27,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:27,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:41:27,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930404973] [2021-07-09 18:41:27,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:41:27,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:27,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:41:27,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:41:27,888 INFO L87 Difference]: Start difference. First operand 20283 states and 78151 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) [2021-07-09 18:41:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:28,135 INFO L93 Difference]: Finished difference Result 25295 states and 94083 transitions. [2021-07-09 18:41:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:41:28,135 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 [2021-07-09 18:41:28,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:28,205 INFO L225 Difference]: With dead ends: 25295 [2021-07-09 18:41:28,206 INFO L226 Difference]: Without dead ends: 25295 [2021-07-09 18:41:28,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:28,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25295 states. [2021-07-09 18:41:28,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25295 to 20593. [2021-07-09 18:41:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20593 states, 20592 states have (on average 3.8444055944055946) internal successors, (79164), 20592 states have internal predecessors, (79164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:28,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20593 states to 20593 states and 79164 transitions. [2021-07-09 18:41:28,942 INFO L78 Accepts]: Start accepts. Automaton has 20593 states and 79164 transitions. Word has length 28 [2021-07-09 18:41:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:28,942 INFO L482 AbstractCegarLoop]: Abstraction has 20593 states and 79164 transitions. [2021-07-09 18:41:28,942 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) [2021-07-09 18:41:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 20593 states and 79164 transitions. [2021-07-09 18:41:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:28,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:28,976 INFO L508 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] [2021-07-09 18:41:29,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3982,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:29,176 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash -136149327, now seen corresponding path program 120 times [2021-07-09 18:41:29,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:29,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972386582] [2021-07-09 18:41:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:29,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:29,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972386582] [2021-07-09 18:41:29,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972386582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:29,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367152603] [2021-07-09 18:41:29,212 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 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 [2021-07-09 18:41:29,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:29,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:29,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:29,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:41:29,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367152603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:29,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:29,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:41:29,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017761797] [2021-07-09 18:41:29,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:29,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:29,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:29,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:29,298 INFO L87 Difference]: Start difference. First operand 20593 states and 79164 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) [2021-07-09 18:41:30,126 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-07-09 18:41:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:30,258 INFO L93 Difference]: Finished difference Result 31016 states and 113583 transitions. [2021-07-09 18:41:30,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:41:30,258 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 [2021-07-09 18:41:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:30,460 INFO L225 Difference]: With dead ends: 31016 [2021-07-09 18:41:30,460 INFO L226 Difference]: Without dead ends: 31016 [2021-07-09 18:41:30,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:41:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31016 states. [2021-07-09 18:41:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31016 to 22203. [2021-07-09 18:41:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22203 states, 22202 states have (on average 3.856454373479867) internal successors, (85621), 22202 states have internal predecessors, (85621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22203 states to 22203 states and 85621 transitions. [2021-07-09 18:41:31,101 INFO L78 Accepts]: Start accepts. Automaton has 22203 states and 85621 transitions. Word has length 28 [2021-07-09 18:41:31,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:31,101 INFO L482 AbstractCegarLoop]: Abstraction has 22203 states and 85621 transitions. [2021-07-09 18:41:31,101 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) [2021-07-09 18:41:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 22203 states and 85621 transitions. [2021-07-09 18:41:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:31,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:31,146 INFO L508 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] [2021-07-09 18:41:31,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:31,346 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:31,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1975921655, now seen corresponding path program 121 times [2021-07-09 18:41:31,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:31,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587412478] [2021-07-09 18:41:31,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:31,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:31,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587412478] [2021-07-09 18:41:31,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587412478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:31,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063588867] [2021-07-09 18:41:31,386 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 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 [2021-07-09 18:41:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:31,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:31,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:41:31,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063588867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:31,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:31,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:41:31,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264251993] [2021-07-09 18:41:31,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:31,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:31,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:31,475 INFO L87 Difference]: Start difference. First operand 22203 states and 85621 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) [2021-07-09 18:41:32,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:32,349 INFO L93 Difference]: Finished difference Result 29255 states and 109041 transitions. [2021-07-09 18:41:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:41:32,350 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 [2021-07-09 18:41:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:32,444 INFO L225 Difference]: With dead ends: 29255 [2021-07-09 18:41:32,444 INFO L226 Difference]: Without dead ends: 29243 [2021-07-09 18:41:32,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 488.4ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:41:32,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29243 states. [2021-07-09 18:41:33,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29243 to 22351. [2021-07-09 18:41:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22351 states, 22350 states have (on average 3.8510514541387026) internal successors, (86071), 22350 states have internal predecessors, (86071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22351 states to 22351 states and 86071 transitions. [2021-07-09 18:41:33,141 INFO L78 Accepts]: Start accepts. Automaton has 22351 states and 86071 transitions. Word has length 28 [2021-07-09 18:41:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:33,142 INFO L482 AbstractCegarLoop]: Abstraction has 22351 states and 86071 transitions. [2021-07-09 18:41:33,142 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) [2021-07-09 18:41:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 22351 states and 86071 transitions. [2021-07-09 18:41:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:33,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:33,179 INFO L508 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] [2021-07-09 18:41:33,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:33,379 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:33,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1688262325, now seen corresponding path program 122 times [2021-07-09 18:41:33,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:33,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234435850] [2021-07-09 18:41:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:33,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:33,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234435850] [2021-07-09 18:41:33,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234435850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:33,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769139893] [2021-07-09 18:41:33,411 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 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 [2021-07-09 18:41:33,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:33,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:33,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:33,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:33,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769139893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:33,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:33,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:41:33,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581351220] [2021-07-09 18:41:33,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:41:33,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:33,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:41:33,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:41:33,488 INFO L87 Difference]: Start difference. First operand 22351 states and 86071 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) [2021-07-09 18:41:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:33,745 INFO L93 Difference]: Finished difference Result 25610 states and 97028 transitions. [2021-07-09 18:41:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:41:33,745 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 [2021-07-09 18:41:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:33,814 INFO L225 Difference]: With dead ends: 25610 [2021-07-09 18:41:33,814 INFO L226 Difference]: Without dead ends: 25610 [2021-07-09 18:41:33,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25610 states. [2021-07-09 18:41:34,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25610 to 23154. [2021-07-09 18:41:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23154 states, 23153 states have (on average 3.8461538461538463) internal successors, (89050), 23153 states have internal predecessors, (89050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23154 states to 23154 states and 89050 transitions. [2021-07-09 18:41:34,527 INFO L78 Accepts]: Start accepts. Automaton has 23154 states and 89050 transitions. Word has length 28 [2021-07-09 18:41:34,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:34,527 INFO L482 AbstractCegarLoop]: Abstraction has 23154 states and 89050 transitions. [2021-07-09 18:41:34,527 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) [2021-07-09 18:41:34,527 INFO L276 IsEmpty]: Start isEmpty. Operand 23154 states and 89050 transitions. [2021-07-09 18:41:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:34,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:34,571 INFO L508 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] [2021-07-09 18:41:34,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:34,778 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:34,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:34,778 INFO L82 PathProgramCache]: Analyzing trace with hash 2131923893, now seen corresponding path program 123 times [2021-07-09 18:41:34,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:34,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377272544] [2021-07-09 18:41:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:34,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:34,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377272544] [2021-07-09 18:41:34,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377272544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:34,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640281493] [2021-07-09 18:41:34,818 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 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 [2021-07-09 18:41:34,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:41:34,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:34,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:34,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640281493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:34,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:34,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:41:34,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976216481] [2021-07-09 18:41:34,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:34,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:34,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:34,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:34,909 INFO L87 Difference]: Start difference. First operand 23154 states and 89050 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) [2021-07-09 18:41:35,653 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-09 18:41:35,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:35,835 INFO L93 Difference]: Finished difference Result 30991 states and 114399 transitions. [2021-07-09 18:41:35,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:41:35,835 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 [2021-07-09 18:41:35,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:35,925 INFO L225 Difference]: With dead ends: 30991 [2021-07-09 18:41:35,925 INFO L226 Difference]: Without dead ends: 30991 [2021-07-09 18:41:35,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 530.8ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:41:35,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30991 states. [2021-07-09 18:41:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30991 to 24366. [2021-07-09 18:41:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24366 states, 24365 states have (on average 3.8139134003693824) internal successors, (92926), 24365 states have internal predecessors, (92926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24366 states to 24366 states and 92926 transitions. [2021-07-09 18:41:36,631 INFO L78 Accepts]: Start accepts. Automaton has 24366 states and 92926 transitions. Word has length 28 [2021-07-09 18:41:36,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:36,631 INFO L482 AbstractCegarLoop]: Abstraction has 24366 states and 92926 transitions. [2021-07-09 18:41:36,631 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) [2021-07-09 18:41:36,631 INFO L276 IsEmpty]: Start isEmpty. Operand 24366 states and 92926 transitions. [2021-07-09 18:41:36,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:36,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:36,671 INFO L508 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] [2021-07-09 18:41:36,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3986,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:36,871 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:36,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:36,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1422950451, now seen corresponding path program 124 times [2021-07-09 18:41:36,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:36,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743700332] [2021-07-09 18:41:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:36,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:36,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743700332] [2021-07-09 18:41:36,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743700332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:36,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27748966] [2021-07-09 18:41:36,911 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 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 [2021-07-09 18:41:36,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:36,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:36,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:36,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27748966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:36,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:36,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:41:36,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187912571] [2021-07-09 18:41:36,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:36,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:36,988 INFO L87 Difference]: Start difference. First operand 24366 states and 92926 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) [2021-07-09 18:41:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:37,706 INFO L93 Difference]: Finished difference Result 30092 states and 112016 transitions. [2021-07-09 18:41:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:41:37,706 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 [2021-07-09 18:41:37,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:37,805 INFO L225 Difference]: With dead ends: 30092 [2021-07-09 18:41:37,805 INFO L226 Difference]: Without dead ends: 30084 [2021-07-09 18:41:37,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:41:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30084 states. [2021-07-09 18:41:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30084 to 24188. [2021-07-09 18:41:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24188 states, 24187 states have (on average 3.820027287385786) internal successors, (92395), 24187 states have internal predecessors, (92395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24188 states to 24188 states and 92395 transitions. [2021-07-09 18:41:38,578 INFO L78 Accepts]: Start accepts. Automaton has 24188 states and 92395 transitions. Word has length 28 [2021-07-09 18:41:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:38,578 INFO L482 AbstractCegarLoop]: Abstraction has 24188 states and 92395 transitions. [2021-07-09 18:41:38,578 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) [2021-07-09 18:41:38,578 INFO L276 IsEmpty]: Start isEmpty. Operand 24188 states and 92395 transitions. [2021-07-09 18:41:38,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:38,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:38,619 INFO L508 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] [2021-07-09 18:41:38,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3987,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:38,820 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:38,820 INFO L82 PathProgramCache]: Analyzing trace with hash 27046477, now seen corresponding path program 125 times [2021-07-09 18:41:38,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:38,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649922498] [2021-07-09 18:41:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:38,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:38,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649922498] [2021-07-09 18:41:38,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649922498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:38,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011862457] [2021-07-09 18:41:38,851 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 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 [2021-07-09 18:41:38,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:41:38,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:38,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:38,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:38,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011862457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:38,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:38,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:41:38,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538223101] [2021-07-09 18:41:38,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:38,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:38,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:38,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:38,946 INFO L87 Difference]: Start difference. First operand 24188 states and 92395 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) [2021-07-09 18:41:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:39,802 INFO L93 Difference]: Finished difference Result 31919 states and 117608 transitions. [2021-07-09 18:41:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:41:39,802 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 [2021-07-09 18:41:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:39,895 INFO L225 Difference]: With dead ends: 31919 [2021-07-09 18:41:39,895 INFO L226 Difference]: Without dead ends: 31919 [2021-07-09 18:41:39,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 499.2ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:41:40,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31919 states. [2021-07-09 18:41:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31919 to 25212. [2021-07-09 18:41:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25212 states, 25211 states have (on average 3.796160406171909) internal successors, (95705), 25211 states have internal predecessors, (95705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25212 states to 25212 states and 95705 transitions. [2021-07-09 18:41:40,696 INFO L78 Accepts]: Start accepts. Automaton has 25212 states and 95705 transitions. Word has length 28 [2021-07-09 18:41:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:40,696 INFO L482 AbstractCegarLoop]: Abstraction has 25212 states and 95705 transitions. [2021-07-09 18:41:40,696 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) [2021-07-09 18:41:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 25212 states and 95705 transitions. [2021-07-09 18:41:40,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:40,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:40,744 INFO L508 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] [2021-07-09 18:41:40,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:40,945 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1055976179, now seen corresponding path program 126 times [2021-07-09 18:41:40,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:40,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586125223] [2021-07-09 18:41:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:40,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:40,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586125223] [2021-07-09 18:41:40,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586125223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:40,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232681828] [2021-07-09 18:41:40,980 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 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 [2021-07-09 18:41:41,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:41,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:41,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:41,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:41,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232681828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:41,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:41,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:41:41,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437846873] [2021-07-09 18:41:41,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:41,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:41,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:41,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:41,177 INFO L87 Difference]: Start difference. First operand 25212 states and 95705 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) [2021-07-09 18:41:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:41,546 INFO L93 Difference]: Finished difference Result 30875 states and 116320 transitions. [2021-07-09 18:41:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:41:41,546 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 [2021-07-09 18:41:41,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:41,630 INFO L225 Difference]: With dead ends: 30875 [2021-07-09 18:41:41,631 INFO L226 Difference]: Without dead ends: 30862 [2021-07-09 18:41:41,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:41:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30862 states. [2021-07-09 18:41:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30862 to 29308. [2021-07-09 18:41:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29308 states, 29307 states have (on average 3.8146517896748215) internal successors, (111796), 29307 states have internal predecessors, (111796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29308 states to 29308 states and 111796 transitions. [2021-07-09 18:41:42,392 INFO L78 Accepts]: Start accepts. Automaton has 29308 states and 111796 transitions. Word has length 28 [2021-07-09 18:41:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:42,392 INFO L482 AbstractCegarLoop]: Abstraction has 29308 states and 111796 transitions. [2021-07-09 18:41:42,392 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) [2021-07-09 18:41:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 29308 states and 111796 transitions. [2021-07-09 18:41:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:42,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:42,445 INFO L508 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] [2021-07-09 18:41:42,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3989,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:42,645 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:42,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:42,645 INFO L82 PathProgramCache]: Analyzing trace with hash 415101939, now seen corresponding path program 127 times [2021-07-09 18:41:42,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:42,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778404835] [2021-07-09 18:41:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:42,788 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 18:41:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:42,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:42,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778404835] [2021-07-09 18:41:42,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778404835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:42,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617981541] [2021-07-09 18:41:42,789 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 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 [2021-07-09 18:41:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:42,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:42,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:42,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617981541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:42,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:42,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:41:42,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716398096] [2021-07-09 18:41:42,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:42,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:42,870 INFO L87 Difference]: Start difference. First operand 29308 states and 111796 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) [2021-07-09 18:41:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:43,237 INFO L93 Difference]: Finished difference Result 32311 states and 121127 transitions. [2021-07-09 18:41:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:41:43,238 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 [2021-07-09 18:41:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:43,459 INFO L225 Difference]: With dead ends: 32311 [2021-07-09 18:41:43,459 INFO L226 Difference]: Without dead ends: 32311 [2021-07-09 18:41:43,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:41:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32311 states. [2021-07-09 18:41:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32311 to 29053. [2021-07-09 18:41:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29053 states, 29052 states have (on average 3.81099407958144) internal successors, (110717), 29052 states have internal predecessors, (110717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29053 states to 29053 states and 110717 transitions. [2021-07-09 18:41:44,220 INFO L78 Accepts]: Start accepts. Automaton has 29053 states and 110717 transitions. Word has length 28 [2021-07-09 18:41:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:44,220 INFO L482 AbstractCegarLoop]: Abstraction has 29053 states and 110717 transitions. [2021-07-09 18:41:44,220 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) [2021-07-09 18:41:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 29053 states and 110717 transitions. [2021-07-09 18:41:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:44,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:44,398 INFO L508 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] [2021-07-09 18:41:44,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3990 [2021-07-09 18:41:44,604 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:44,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:44,604 INFO L82 PathProgramCache]: Analyzing trace with hash -17774665, now seen corresponding path program 128 times [2021-07-09 18:41:44,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:44,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537702522] [2021-07-09 18:41:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:44,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:44,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537702522] [2021-07-09 18:41:44,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537702522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:44,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484485822] [2021-07-09 18:41:44,636 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 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 [2021-07-09 18:41:44,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:44,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:44,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:44,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484485822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:44,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:44,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:41:44,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681861114] [2021-07-09 18:41:44,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:44,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:44,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:44,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:44,714 INFO L87 Difference]: Start difference. First operand 29053 states and 110717 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) [2021-07-09 18:41:45,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:45,414 INFO L93 Difference]: Finished difference Result 35470 states and 132021 transitions. [2021-07-09 18:41:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:41:45,414 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 [2021-07-09 18:41:45,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:45,511 INFO L225 Difference]: With dead ends: 35470 [2021-07-09 18:41:45,511 INFO L226 Difference]: Without dead ends: 35462 [2021-07-09 18:41:45,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:41:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35462 states. [2021-07-09 18:41:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35462 to 29019. [2021-07-09 18:41:46,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29019 states, 29018 states have (on average 3.8114273898959268) internal successors, (110600), 29018 states have internal predecessors, (110600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29019 states to 29019 states and 110600 transitions. [2021-07-09 18:41:46,428 INFO L78 Accepts]: Start accepts. Automaton has 29019 states and 110600 transitions. Word has length 28 [2021-07-09 18:41:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:46,428 INFO L482 AbstractCegarLoop]: Abstraction has 29019 states and 110600 transitions. [2021-07-09 18:41:46,428 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) [2021-07-09 18:41:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 29019 states and 110600 transitions. [2021-07-09 18:41:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:46,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:46,482 INFO L508 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] [2021-07-09 18:41:46,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3991 [2021-07-09 18:41:46,683 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:46,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:46,683 INFO L82 PathProgramCache]: Analyzing trace with hash -913595481, now seen corresponding path program 129 times [2021-07-09 18:41:46,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:46,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593767352] [2021-07-09 18:41:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:46,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:46,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593767352] [2021-07-09 18:41:46,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593767352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:46,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126327011] [2021-07-09 18:41:46,716 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 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 [2021-07-09 18:41:46,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:41:46,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:46,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:46,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126327011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:46,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:46,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:41:46,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125237861] [2021-07-09 18:41:46,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:46,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:46,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:46,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:46,794 INFO L87 Difference]: Start difference. First operand 29019 states and 110600 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) [2021-07-09 18:41:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:47,345 INFO L93 Difference]: Finished difference Result 31865 states and 120062 transitions. [2021-07-09 18:41:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:41:47,345 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 [2021-07-09 18:41:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:47,428 INFO L225 Difference]: With dead ends: 31865 [2021-07-09 18:41:47,428 INFO L226 Difference]: Without dead ends: 31865 [2021-07-09 18:41:47,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:41:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31865 states. [2021-07-09 18:41:47,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31865 to 29551. [2021-07-09 18:41:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29551 states, 29550 states have (on average 3.8099492385786804) internal successors, (112584), 29550 states have internal predecessors, (112584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29551 states to 29551 states and 112584 transitions. [2021-07-09 18:41:48,109 INFO L78 Accepts]: Start accepts. Automaton has 29551 states and 112584 transitions. Word has length 28 [2021-07-09 18:41:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:48,109 INFO L482 AbstractCegarLoop]: Abstraction has 29551 states and 112584 transitions. [2021-07-09 18:41:48,109 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) [2021-07-09 18:41:48,109 INFO L276 IsEmpty]: Start isEmpty. Operand 29551 states and 112584 transitions. [2021-07-09 18:41:48,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:48,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:48,296 INFO L508 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] [2021-07-09 18:41:48,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:48,497 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:48,497 INFO L82 PathProgramCache]: Analyzing trace with hash 579561993, now seen corresponding path program 130 times [2021-07-09 18:41:48,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:48,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440200731] [2021-07-09 18:41:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:48,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:48,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440200731] [2021-07-09 18:41:48,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440200731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:48,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872358719] [2021-07-09 18:41:48,532 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 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 [2021-07-09 18:41:48,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:48,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:48,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:48,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:48,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872358719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:48,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:48,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:41:48,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735579929] [2021-07-09 18:41:48,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:48,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:48,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:48,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:48,619 INFO L87 Difference]: Start difference. First operand 29551 states and 112584 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) [2021-07-09 18:41:49,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:49,416 INFO L93 Difference]: Finished difference Result 36395 states and 135424 transitions. [2021-07-09 18:41:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:41:49,417 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 [2021-07-09 18:41:49,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:49,514 INFO L225 Difference]: With dead ends: 36395 [2021-07-09 18:41:49,515 INFO L226 Difference]: Without dead ends: 36371 [2021-07-09 18:41:49,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 286.8ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:41:49,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36371 states. [2021-07-09 18:41:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36371 to 29723. [2021-07-09 18:41:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29723 states, 29722 states have (on average 3.8058677074221117) internal successors, (113118), 29722 states have internal predecessors, (113118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29723 states to 29723 states and 113118 transitions. [2021-07-09 18:41:50,243 INFO L78 Accepts]: Start accepts. Automaton has 29723 states and 113118 transitions. Word has length 28 [2021-07-09 18:41:50,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:50,243 INFO L482 AbstractCegarLoop]: Abstraction has 29723 states and 113118 transitions. [2021-07-09 18:41:50,243 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) [2021-07-09 18:41:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 29723 states and 113118 transitions. [2021-07-09 18:41:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:50,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:50,458 INFO L508 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] [2021-07-09 18:41:50,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:50,673 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:50,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1271447701, now seen corresponding path program 131 times [2021-07-09 18:41:50,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:50,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311443052] [2021-07-09 18:41:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:50,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:50,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311443052] [2021-07-09 18:41:50,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311443052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:50,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35262993] [2021-07-09 18:41:50,711 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 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 [2021-07-09 18:41:50,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:50,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:50,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:41:50,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:50,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35262993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:50,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:50,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-09 18:41:50,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362677458] [2021-07-09 18:41:50,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:50,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:50,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:50,785 INFO L87 Difference]: Start difference. First operand 29723 states and 113118 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) [2021-07-09 18:41:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:51,283 INFO L93 Difference]: Finished difference Result 32279 states and 121530 transitions. [2021-07-09 18:41:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:41:51,283 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 [2021-07-09 18:41:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:51,507 INFO L225 Difference]: With dead ends: 32279 [2021-07-09 18:41:51,508 INFO L226 Difference]: Without dead ends: 32279 [2021-07-09 18:41:51,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:41:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32279 states. [2021-07-09 18:41:52,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32279 to 29649. [2021-07-09 18:41:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29649 states, 29648 states have (on average 3.8067323259579062) internal successors, (112862), 29648 states have internal predecessors, (112862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29649 states to 29649 states and 112862 transitions. [2021-07-09 18:41:52,247 INFO L78 Accepts]: Start accepts. Automaton has 29649 states and 112862 transitions. Word has length 28 [2021-07-09 18:41:52,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:52,247 INFO L482 AbstractCegarLoop]: Abstraction has 29649 states and 112862 transitions. [2021-07-09 18:41:52,247 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) [2021-07-09 18:41:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand 29649 states and 112862 transitions. [2021-07-09 18:41:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:52,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:52,306 INFO L508 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] [2021-07-09 18:41:52,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:52,506 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:52,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:52,507 INFO L82 PathProgramCache]: Analyzing trace with hash -412931571, now seen corresponding path program 132 times [2021-07-09 18:41:52,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:52,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854805051] [2021-07-09 18:41:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:52,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:52,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854805051] [2021-07-09 18:41:52,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854805051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:52,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023766794] [2021-07-09 18:41:52,551 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 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 [2021-07-09 18:41:52,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:41:52,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:52,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:52,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:52,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023766794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:52,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:52,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 18:41:52,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057427810] [2021-07-09 18:41:52,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:52,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:52,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:52,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:52,639 INFO L87 Difference]: Start difference. First operand 29649 states and 112862 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) [2021-07-09 18:41:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:53,449 INFO L93 Difference]: Finished difference Result 36318 states and 135165 transitions. [2021-07-09 18:41:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:41:53,449 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 [2021-07-09 18:41:53,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:53,548 INFO L225 Difference]: With dead ends: 36318 [2021-07-09 18:41:53,548 INFO L226 Difference]: Without dead ends: 36278 [2021-07-09 18:41:53,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:41:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36278 states. [2021-07-09 18:41:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36278 to 29805. [2021-07-09 18:41:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29805 states, 29804 states have (on average 3.80284525567038) internal successors, (113340), 29804 states have internal predecessors, (113340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29805 states to 29805 states and 113340 transitions. [2021-07-09 18:41:54,459 INFO L78 Accepts]: Start accepts. Automaton has 29805 states and 113340 transitions. Word has length 28 [2021-07-09 18:41:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:54,459 INFO L482 AbstractCegarLoop]: Abstraction has 29805 states and 113340 transitions. [2021-07-09 18:41:54,459 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) [2021-07-09 18:41:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 29805 states and 113340 transitions. [2021-07-09 18:41:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:54,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:54,517 INFO L508 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] [2021-07-09 18:41:54,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:54,718 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:54,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1625942477, now seen corresponding path program 133 times [2021-07-09 18:41:54,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:54,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566638076] [2021-07-09 18:41:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:54,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566638076] [2021-07-09 18:41:54,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566638076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681790728] [2021-07-09 18:41:54,753 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 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 [2021-07-09 18:41:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:54,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:54,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:54,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681790728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:54,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:54,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:41:54,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597229702] [2021-07-09 18:41:54,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:54,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:54,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:54,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:54,877 INFO L87 Difference]: Start difference. First operand 29805 states and 113340 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) [2021-07-09 18:41:56,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:56,411 INFO L93 Difference]: Finished difference Result 68211 states and 251076 transitions. [2021-07-09 18:41:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:41:56,411 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 [2021-07-09 18:41:56,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:56,628 INFO L225 Difference]: With dead ends: 68211 [2021-07-09 18:41:56,628 INFO L226 Difference]: Without dead ends: 68211 [2021-07-09 18:41:56,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 650.9ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:41:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68211 states. [2021-07-09 18:41:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68211 to 37529. [2021-07-09 18:41:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37529 states, 37528 states have (on average 3.8846727776593477) internal successors, (145784), 37528 states have internal predecessors, (145784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37529 states to 37529 states and 145784 transitions. [2021-07-09 18:41:58,207 INFO L78 Accepts]: Start accepts. Automaton has 37529 states and 145784 transitions. Word has length 28 [2021-07-09 18:41:58,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:58,207 INFO L482 AbstractCegarLoop]: Abstraction has 37529 states and 145784 transitions. [2021-07-09 18:41:58,207 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) [2021-07-09 18:41:58,207 INFO L276 IsEmpty]: Start isEmpty. Operand 37529 states and 145784 transitions. [2021-07-09 18:41:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:41:58,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:58,280 INFO L508 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] [2021-07-09 18:41:58,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3996,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:58,481 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:58,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2102072739, now seen corresponding path program 134 times [2021-07-09 18:41:58,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:58,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134600022] [2021-07-09 18:41:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:58,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:58,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134600022] [2021-07-09 18:41:58,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134600022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:58,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086714885] [2021-07-09 18:41:58,513 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 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 [2021-07-09 18:41:58,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:58,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:58,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:41:58,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:58,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086714885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:58,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:58,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:41:58,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281722627] [2021-07-09 18:41:58,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:41:58,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:58,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:41:58,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:41:58,634 INFO L87 Difference]: Start difference. First operand 37529 states and 145784 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) [2021-07-09 18:41:59,421 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-09 18:42:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:00,016 INFO L93 Difference]: Finished difference Result 67584 states and 249415 transitions. [2021-07-09 18:42:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:42:00,016 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 [2021-07-09 18:42:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:00,235 INFO L225 Difference]: With dead ends: 67584 [2021-07-09 18:42:00,235 INFO L226 Difference]: Without dead ends: 67584 [2021-07-09 18:42:00,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 763.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:42:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67584 states. [2021-07-09 18:42:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67584 to 37526. [2021-07-09 18:42:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37526 states, 37525 states have (on average 3.884610259826782) internal successors, (145770), 37525 states have internal predecessors, (145770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37526 states to 37526 states and 145770 transitions. [2021-07-09 18:42:01,828 INFO L78 Accepts]: Start accepts. Automaton has 37526 states and 145770 transitions. Word has length 28 [2021-07-09 18:42:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:01,828 INFO L482 AbstractCegarLoop]: Abstraction has 37526 states and 145770 transitions. [2021-07-09 18:42:01,828 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) [2021-07-09 18:42:01,828 INFO L276 IsEmpty]: Start isEmpty. Operand 37526 states and 145770 transitions. [2021-07-09 18:42:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:01,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:01,895 INFO L508 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] [2021-07-09 18:42:02,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:02,095 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:02,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:02,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1020548699, now seen corresponding path program 135 times [2021-07-09 18:42:02,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:02,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383947839] [2021-07-09 18:42:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:02,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:02,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383947839] [2021-07-09 18:42:02,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383947839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:02,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545572193] [2021-07-09 18:42:02,126 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 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 [2021-07-09 18:42:02,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:42:02,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:02,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:02,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:02,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545572193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:02,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:02,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:42:02,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702134695] [2021-07-09 18:42:02,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:42:02,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:02,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:42:02,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:42:02,241 INFO L87 Difference]: Start difference. First operand 37526 states and 145770 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) [2021-07-09 18:42:03,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:03,800 INFO L93 Difference]: Finished difference Result 62987 states and 233868 transitions. [2021-07-09 18:42:03,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:42:03,801 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 [2021-07-09 18:42:03,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:04,005 INFO L225 Difference]: With dead ends: 62987 [2021-07-09 18:42:04,005 INFO L226 Difference]: Without dead ends: 62987 [2021-07-09 18:42:04,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 581.0ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:42:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62987 states. [2021-07-09 18:42:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62987 to 37548. [2021-07-09 18:42:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37548 states, 37547 states have (on average 3.8849175699789598) internal successors, (145867), 37547 states have internal predecessors, (145867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37548 states to 37548 states and 145867 transitions. [2021-07-09 18:42:05,527 INFO L78 Accepts]: Start accepts. Automaton has 37548 states and 145867 transitions. Word has length 28 [2021-07-09 18:42:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:05,527 INFO L482 AbstractCegarLoop]: Abstraction has 37548 states and 145867 transitions. [2021-07-09 18:42:05,527 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) [2021-07-09 18:42:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 37548 states and 145867 transitions. [2021-07-09 18:42:05,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:05,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:05,621 INFO L508 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] [2021-07-09 18:42:05,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3998,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:05,821 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:05,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1101924787, now seen corresponding path program 136 times [2021-07-09 18:42:05,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:05,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730039884] [2021-07-09 18:42:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:05,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:05,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730039884] [2021-07-09 18:42:05,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730039884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:05,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61274421] [2021-07-09 18:42:05,854 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 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 [2021-07-09 18:42:05,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:05,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:05,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:05,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:05,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61274421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:05,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:05,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:42:05,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455679400] [2021-07-09 18:42:05,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:42:05,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:05,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:42:05,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:42:05,975 INFO L87 Difference]: Start difference. First operand 37548 states and 145867 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) [2021-07-09 18:42:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:07,172 INFO L93 Difference]: Finished difference Result 62120 states and 231628 transitions. [2021-07-09 18:42:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:42:07,172 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 [2021-07-09 18:42:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:07,384 INFO L225 Difference]: With dead ends: 62120 [2021-07-09 18:42:07,384 INFO L226 Difference]: Without dead ends: 62112 [2021-07-09 18:42:07,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 496.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:42:07,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62112 states. [2021-07-09 18:42:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62112 to 37548. [2021-07-09 18:42:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37548 states, 37547 states have (on average 3.8847577702612726) internal successors, (145861), 37547 states have internal predecessors, (145861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37548 states to 37548 states and 145861 transitions. [2021-07-09 18:42:08,956 INFO L78 Accepts]: Start accepts. Automaton has 37548 states and 145861 transitions. Word has length 28 [2021-07-09 18:42:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:08,956 INFO L482 AbstractCegarLoop]: Abstraction has 37548 states and 145861 transitions. [2021-07-09 18:42:08,956 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) [2021-07-09 18:42:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 37548 states and 145861 transitions. [2021-07-09 18:42:09,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:09,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:09,032 INFO L508 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] [2021-07-09 18:42:09,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3999 [2021-07-09 18:42:09,247 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:09,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2032582003, now seen corresponding path program 137 times [2021-07-09 18:42:09,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:09,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931453908] [2021-07-09 18:42:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:09,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:09,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931453908] [2021-07-09 18:42:09,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931453908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:09,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813744954] [2021-07-09 18:42:09,280 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 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 [2021-07-09 18:42:09,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:42:09,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:09,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:09,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:09,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813744954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:09,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:09,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:09,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167728066] [2021-07-09 18:42:09,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:09,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:09,424 INFO L87 Difference]: Start difference. First operand 37548 states and 145861 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) [2021-07-09 18:42:10,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:10,789 INFO L93 Difference]: Finished difference Result 61801 states and 230767 transitions. [2021-07-09 18:42:10,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:42:10,789 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 [2021-07-09 18:42:10,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:11,167 INFO L225 Difference]: With dead ends: 61801 [2021-07-09 18:42:11,167 INFO L226 Difference]: Without dead ends: 61801 [2021-07-09 18:42:11,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 578.4ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:42:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61801 states. [2021-07-09 18:42:12,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61801 to 37556. [2021-07-09 18:42:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37556 states, 37555 states have (on average 3.884835574490747) internal successors, (145895), 37555 states have internal predecessors, (145895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37556 states to 37556 states and 145895 transitions. [2021-07-09 18:42:12,505 INFO L78 Accepts]: Start accepts. Automaton has 37556 states and 145895 transitions. Word has length 28 [2021-07-09 18:42:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:12,505 INFO L482 AbstractCegarLoop]: Abstraction has 37556 states and 145895 transitions. [2021-07-09 18:42:12,505 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) [2021-07-09 18:42:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 37556 states and 145895 transitions. [2021-07-09 18:42:12,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:12,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:12,573 INFO L508 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] [2021-07-09 18:42:12,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-07-09 18:42:12,773 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:12,774 INFO L82 PathProgramCache]: Analyzing trace with hash -619346139, now seen corresponding path program 138 times [2021-07-09 18:42:12,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:12,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009359923] [2021-07-09 18:42:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:12,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:12,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009359923] [2021-07-09 18:42:12,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009359923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:12,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272291016] [2021-07-09 18:42:12,805 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 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 [2021-07-09 18:42:12,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:42:12,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:12,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:12,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:12,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272291016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:12,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:12,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:12,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333128092] [2021-07-09 18:42:12,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:12,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:12,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:12,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:12,923 INFO L87 Difference]: Start difference. First operand 37556 states and 145895 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) [2021-07-09 18:42:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:14,170 INFO L93 Difference]: Finished difference Result 61590 states and 230241 transitions. [2021-07-09 18:42:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:42:14,170 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 [2021-07-09 18:42:14,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:14,568 INFO L225 Difference]: With dead ends: 61590 [2021-07-09 18:42:14,568 INFO L226 Difference]: Without dead ends: 61582 [2021-07-09 18:42:14,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 488.1ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:42:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61582 states. [2021-07-09 18:42:15,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61582 to 37556. [2021-07-09 18:42:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37556 states, 37555 states have (on average 3.884782319265078) internal successors, (145893), 37555 states have internal predecessors, (145893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:15,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37556 states to 37556 states and 145893 transitions. [2021-07-09 18:42:15,932 INFO L78 Accepts]: Start accepts. Automaton has 37556 states and 145893 transitions. Word has length 28 [2021-07-09 18:42:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:15,933 INFO L482 AbstractCegarLoop]: Abstraction has 37556 states and 145893 transitions. [2021-07-09 18:42:15,933 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) [2021-07-09 18:42:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 37556 states and 145893 transitions. [2021-07-09 18:42:16,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:16,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:16,000 INFO L508 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] [2021-07-09 18:42:16,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-07-09 18:42:16,200 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:16,201 INFO L82 PathProgramCache]: Analyzing trace with hash 384081845, now seen corresponding path program 139 times [2021-07-09 18:42:16,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:16,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011585507] [2021-07-09 18:42:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:16,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:16,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011585507] [2021-07-09 18:42:16,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011585507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:16,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389083511] [2021-07-09 18:42:16,234 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 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 [2021-07-09 18:42:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:16,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:16,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:16,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389083511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:16,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:16,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:42:16,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380041490] [2021-07-09 18:42:16,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:16,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:16,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:16,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:16,339 INFO L87 Difference]: Start difference. First operand 37556 states and 145893 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) [2021-07-09 18:42:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:17,712 INFO L93 Difference]: Finished difference Result 60972 states and 226630 transitions. [2021-07-09 18:42:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:42:17,712 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 [2021-07-09 18:42:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:18,125 INFO L225 Difference]: With dead ends: 60972 [2021-07-09 18:42:18,125 INFO L226 Difference]: Without dead ends: 60972 [2021-07-09 18:42:18,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 779.8ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:42:18,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60972 states. [2021-07-09 18:42:19,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60972 to 40355. [2021-07-09 18:42:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40355 states, 40354 states have (on average 3.8889081627595776) internal successors, (156933), 40354 states have internal predecessors, (156933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40355 states to 40355 states and 156933 transitions. [2021-07-09 18:42:19,641 INFO L78 Accepts]: Start accepts. Automaton has 40355 states and 156933 transitions. Word has length 28 [2021-07-09 18:42:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:19,642 INFO L482 AbstractCegarLoop]: Abstraction has 40355 states and 156933 transitions. [2021-07-09 18:42:19,642 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) [2021-07-09 18:42:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 40355 states and 156933 transitions. [2021-07-09 18:42:19,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:19,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:19,714 INFO L508 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] [2021-07-09 18:42:19,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4002 [2021-07-09 18:42:19,915 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:19,915 INFO L82 PathProgramCache]: Analyzing trace with hash 465457933, now seen corresponding path program 140 times [2021-07-09 18:42:19,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:19,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790275250] [2021-07-09 18:42:19,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:19,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:19,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790275250] [2021-07-09 18:42:19,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790275250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:19,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453586099] [2021-07-09 18:42:19,949 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 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 [2021-07-09 18:42:19,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:19,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:19,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:19,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:20,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453586099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:20,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:20,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:42:20,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208907692] [2021-07-09 18:42:20,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:20,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:20,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:20,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:20,046 INFO L87 Difference]: Start difference. First operand 40355 states and 156933 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) [2021-07-09 18:42:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:21,281 INFO L93 Difference]: Finished difference Result 60488 states and 225357 transitions. [2021-07-09 18:42:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:42:21,282 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 [2021-07-09 18:42:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:21,700 INFO L225 Difference]: With dead ends: 60488 [2021-07-09 18:42:21,700 INFO L226 Difference]: Without dead ends: 60480 [2021-07-09 18:42:21,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:42:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60480 states. [2021-07-09 18:42:22,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60480 to 40081. [2021-07-09 18:42:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40081 states, 40080 states have (on average 3.8941616766467066) internal successors, (156078), 40080 states have internal predecessors, (156078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40081 states to 40081 states and 156078 transitions. [2021-07-09 18:42:23,100 INFO L78 Accepts]: Start accepts. Automaton has 40081 states and 156078 transitions. Word has length 28 [2021-07-09 18:42:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:23,100 INFO L482 AbstractCegarLoop]: Abstraction has 40081 states and 156078 transitions. [2021-07-09 18:42:23,100 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) [2021-07-09 18:42:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 40081 states and 156078 transitions. [2021-07-09 18:42:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:23,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:23,180 INFO L508 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] [2021-07-09 18:42:23,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4003,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:23,381 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:23,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1049634039, now seen corresponding path program 141 times [2021-07-09 18:42:23,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:23,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717887013] [2021-07-09 18:42:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:23,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:23,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717887013] [2021-07-09 18:42:23,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717887013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:23,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712323345] [2021-07-09 18:42:23,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:42:23,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:42:23,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:23,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:23,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:23,672 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-09 18:42:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:23,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712323345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:23,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:23,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-09 18:42:23,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163153697] [2021-07-09 18:42:23,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:23,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:23,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:23,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:23,704 INFO L87 Difference]: Start difference. First operand 40081 states and 156078 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) [2021-07-09 18:42:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:24,800 INFO L93 Difference]: Finished difference Result 59033 states and 221360 transitions. [2021-07-09 18:42:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:42:24,800 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 [2021-07-09 18:42:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:25,011 INFO L225 Difference]: With dead ends: 59033 [2021-07-09 18:42:25,011 INFO L226 Difference]: Without dead ends: 59009 [2021-07-09 18:42:25,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 353.2ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:42:25,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59009 states. [2021-07-09 18:42:26,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59009 to 39991. [2021-07-09 18:42:26,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39991 states, 39990 states have (on average 3.893998499624906) internal successors, (155721), 39990 states have internal predecessors, (155721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39991 states to 39991 states and 155721 transitions. [2021-07-09 18:42:26,499 INFO L78 Accepts]: Start accepts. Automaton has 39991 states and 155721 transitions. Word has length 28 [2021-07-09 18:42:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:26,499 INFO L482 AbstractCegarLoop]: Abstraction has 39991 states and 155721 transitions. [2021-07-09 18:42:26,499 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) [2021-07-09 18:42:26,499 INFO L276 IsEmpty]: Start isEmpty. Operand 39991 states and 155721 transitions. [2021-07-09 18:42:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:26,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:26,578 INFO L508 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] [2021-07-09 18:42:26,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:26,779 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:26,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:26,779 INFO L82 PathProgramCache]: Analyzing trace with hash 547492677, now seen corresponding path program 142 times [2021-07-09 18:42:26,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:26,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177134680] [2021-07-09 18:42:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:26,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:26,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177134680] [2021-07-09 18:42:26,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177134680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:26,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262880985] [2021-07-09 18:42:26,820 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 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 [2021-07-09 18:42:26,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:26,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:26,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:26,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:27,076 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-09 18:42:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:27,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262880985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:27,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:27,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:27,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598267913] [2021-07-09 18:42:27,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:27,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:27,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:27,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:27,138 INFO L87 Difference]: Start difference. First operand 39991 states and 155721 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) [2021-07-09 18:42:28,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:28,465 INFO L93 Difference]: Finished difference Result 60273 states and 224760 transitions. [2021-07-09 18:42:28,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:42:28,465 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 [2021-07-09 18:42:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:28,685 INFO L225 Difference]: With dead ends: 60273 [2021-07-09 18:42:28,685 INFO L226 Difference]: Without dead ends: 60273 [2021-07-09 18:42:28,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 592.5ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:42:28,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60273 states. [2021-07-09 18:42:30,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60273 to 40087. [2021-07-09 18:42:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40087 states, 40086 states have (on average 3.892506111859502) internal successors, (156035), 40086 states have internal predecessors, (156035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40087 states to 40087 states and 156035 transitions. [2021-07-09 18:42:30,356 INFO L78 Accepts]: Start accepts. Automaton has 40087 states and 156035 transitions. Word has length 28 [2021-07-09 18:42:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:30,356 INFO L482 AbstractCegarLoop]: Abstraction has 40087 states and 156035 transitions. [2021-07-09 18:42:30,356 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) [2021-07-09 18:42:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 40087 states and 156035 transitions. [2021-07-09 18:42:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:30,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:30,450 INFO L508 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] [2021-07-09 18:42:30,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4005,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:30,651 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:30,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:30,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2104435465, now seen corresponding path program 143 times [2021-07-09 18:42:30,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:30,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960079087] [2021-07-09 18:42:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:30,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:30,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960079087] [2021-07-09 18:42:30,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960079087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:30,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399667508] [2021-07-09 18:42:30,684 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 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 [2021-07-09 18:42:30,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:42:30,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:30,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:30,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:30,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399667508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:30,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:30,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 18:42:30,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213415219] [2021-07-09 18:42:30,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:42:30,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:30,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:42:30,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:42:30,802 INFO L87 Difference]: Start difference. First operand 40087 states and 156035 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) [2021-07-09 18:42:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:32,015 INFO L93 Difference]: Finished difference Result 59960 states and 223872 transitions. [2021-07-09 18:42:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:42:32,015 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 [2021-07-09 18:42:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:32,248 INFO L225 Difference]: With dead ends: 59960 [2021-07-09 18:42:32,249 INFO L226 Difference]: Without dead ends: 59952 [2021-07-09 18:42:32,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 486.4ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:42:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59952 states. [2021-07-09 18:42:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59952 to 40019. [2021-07-09 18:42:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40019 states, 40018 states have (on average 3.893822779749113) internal successors, (155823), 40018 states have internal predecessors, (155823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40019 states to 40019 states and 155823 transitions. [2021-07-09 18:42:33,920 INFO L78 Accepts]: Start accepts. Automaton has 40019 states and 155823 transitions. Word has length 28 [2021-07-09 18:42:33,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:33,920 INFO L482 AbstractCegarLoop]: Abstraction has 40019 states and 155823 transitions. [2021-07-09 18:42:33,920 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) [2021-07-09 18:42:33,920 INFO L276 IsEmpty]: Start isEmpty. Operand 40019 states and 155823 transitions. [2021-07-09 18:42:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:34,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:34,004 INFO L508 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] [2021-07-09 18:42:34,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4006,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:34,204 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:34,205 INFO L82 PathProgramCache]: Analyzing trace with hash 923074653, now seen corresponding path program 144 times [2021-07-09 18:42:34,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:34,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808622086] [2021-07-09 18:42:34,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:34,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:34,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808622086] [2021-07-09 18:42:34,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808622086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:34,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097838163] [2021-07-09 18:42:34,238 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 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 [2021-07-09 18:42:34,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:42:34,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:34,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:34,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:34,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097838163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:34,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:34,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-09 18:42:34,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092083799] [2021-07-09 18:42:34,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:42:34,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:34,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:42:34,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:42:34,346 INFO L87 Difference]: Start difference. First operand 40019 states and 155823 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) [2021-07-09 18:42:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:35,427 INFO L93 Difference]: Finished difference Result 58691 states and 220361 transitions. [2021-07-09 18:42:35,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:42:35,427 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 [2021-07-09 18:42:35,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:35,644 INFO L225 Difference]: With dead ends: 58691 [2021-07-09 18:42:35,645 INFO L226 Difference]: Without dead ends: 58667 [2021-07-09 18:42:35,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 358.5ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:42:35,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58667 states. [2021-07-09 18:42:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58667 to 39995. [2021-07-09 18:42:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39995 states, 39994 states have (on average 3.89395909386408) internal successors, (155735), 39994 states have internal predecessors, (155735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39995 states to 39995 states and 155735 transitions. [2021-07-09 18:42:37,328 INFO L78 Accepts]: Start accepts. Automaton has 39995 states and 155735 transitions. Word has length 28 [2021-07-09 18:42:37,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:37,328 INFO L482 AbstractCegarLoop]: Abstraction has 39995 states and 155735 transitions. [2021-07-09 18:42:37,328 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) [2021-07-09 18:42:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 39995 states and 155735 transitions. [2021-07-09 18:42:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:37,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:37,414 INFO L508 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] [2021-07-09 18:42:37,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4007 [2021-07-09 18:42:37,615 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:37,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:37,615 INFO L82 PathProgramCache]: Analyzing trace with hash 100408761, now seen corresponding path program 145 times [2021-07-09 18:42:37,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:37,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802229748] [2021-07-09 18:42:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:37,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:37,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802229748] [2021-07-09 18:42:37,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802229748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:37,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203764715] [2021-07-09 18:42:37,653 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 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 [2021-07-09 18:42:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:37,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:37,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:37,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203764715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:37,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:37,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:42:37,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717954222] [2021-07-09 18:42:37,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:37,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:37,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:37,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:37,748 INFO L87 Difference]: Start difference. First operand 39995 states and 155735 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) [2021-07-09 18:42:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:39,414 INFO L93 Difference]: Finished difference Result 61857 states and 229366 transitions. [2021-07-09 18:42:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:42:39,414 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 [2021-07-09 18:42:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:39,648 INFO L225 Difference]: With dead ends: 61857 [2021-07-09 18:42:39,648 INFO L226 Difference]: Without dead ends: 61857 [2021-07-09 18:42:39,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 844.8ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:42:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61857 states. [2021-07-09 18:42:41,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61857 to 44335. [2021-07-09 18:42:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44335 states, 44334 states have (on average 3.8442053502954843) internal successors, (170429), 44334 states have internal predecessors, (170429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44335 states to 44335 states and 170429 transitions. [2021-07-09 18:42:41,408 INFO L78 Accepts]: Start accepts. Automaton has 44335 states and 170429 transitions. Word has length 28 [2021-07-09 18:42:41,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:41,408 INFO L482 AbstractCegarLoop]: Abstraction has 44335 states and 170429 transitions. [2021-07-09 18:42:41,408 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) [2021-07-09 18:42:41,408 INFO L276 IsEmpty]: Start isEmpty. Operand 44335 states and 170429 transitions. [2021-07-09 18:42:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:41,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:41,495 INFO L508 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] [2021-07-09 18:42:41,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4008,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:41,695 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:41,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:41,696 INFO L82 PathProgramCache]: Analyzing trace with hash 181784849, now seen corresponding path program 146 times [2021-07-09 18:42:41,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:41,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990091037] [2021-07-09 18:42:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:41,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:41,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990091037] [2021-07-09 18:42:41,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990091037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:41,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376040696] [2021-07-09 18:42:41,750 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 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 [2021-07-09 18:42:41,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:41,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:41,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:41,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:41,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376040696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:41,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:41,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:42:41,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127606240] [2021-07-09 18:42:41,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:41,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:41,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:41,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:41,849 INFO L87 Difference]: Start difference. First operand 44335 states and 170429 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) [2021-07-09 18:42:43,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:43,469 INFO L93 Difference]: Finished difference Result 61088 states and 227260 transitions. [2021-07-09 18:42:43,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:42:43,470 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 [2021-07-09 18:42:43,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:43,694 INFO L225 Difference]: With dead ends: 61088 [2021-07-09 18:42:43,694 INFO L226 Difference]: Without dead ends: 61080 [2021-07-09 18:42:43,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 664.3ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:42:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61080 states. [2021-07-09 18:42:45,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61080 to 43223. [2021-07-09 18:42:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43223 states, 43222 states have (on average 3.862963305723937) internal successors, (166965), 43222 states have internal predecessors, (166965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43223 states to 43223 states and 166965 transitions. [2021-07-09 18:42:45,240 INFO L78 Accepts]: Start accepts. Automaton has 43223 states and 166965 transitions. Word has length 28 [2021-07-09 18:42:45,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:45,240 INFO L482 AbstractCegarLoop]: Abstraction has 43223 states and 166965 transitions. [2021-07-09 18:42:45,240 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) [2021-07-09 18:42:45,240 INFO L276 IsEmpty]: Start isEmpty. Operand 43223 states and 166965 transitions. [2021-07-09 18:42:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:45,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:45,324 INFO L508 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] [2021-07-09 18:42:45,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4009 [2021-07-09 18:42:45,525 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:45,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:45,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1333307123, now seen corresponding path program 147 times [2021-07-09 18:42:45,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:45,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87491773] [2021-07-09 18:42:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:45,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:45,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87491773] [2021-07-09 18:42:45,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87491773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:45,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78783553] [2021-07-09 18:42:45,562 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 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 [2021-07-09 18:42:45,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:42:45,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:45,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:45,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78783553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:45,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:45,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:42:45,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110663563] [2021-07-09 18:42:45,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:45,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:45,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:45,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:45,839 INFO L87 Difference]: Start difference. First operand 43223 states and 166965 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) [2021-07-09 18:42:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:47,130 INFO L93 Difference]: Finished difference Result 59466 states and 222744 transitions. [2021-07-09 18:42:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:42:47,131 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 [2021-07-09 18:42:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:47,348 INFO L225 Difference]: With dead ends: 59466 [2021-07-09 18:42:47,348 INFO L226 Difference]: Without dead ends: 59442 [2021-07-09 18:42:47,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 576.2ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:42:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59442 states. [2021-07-09 18:42:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59442 to 43235. [2021-07-09 18:42:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43235 states, 43234 states have (on average 3.860827126798353) internal successors, (166919), 43234 states have internal predecessors, (166919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43235 states to 43235 states and 166919 transitions. [2021-07-09 18:42:48,877 INFO L78 Accepts]: Start accepts. Automaton has 43235 states and 166919 transitions. Word has length 28 [2021-07-09 18:42:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:48,877 INFO L482 AbstractCegarLoop]: Abstraction has 43235 states and 166919 transitions. [2021-07-09 18:42:48,878 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) [2021-07-09 18:42:48,878 INFO L276 IsEmpty]: Start isEmpty. Operand 43235 states and 166919 transitions. [2021-07-09 18:42:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:49,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:49,153 INFO L508 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] [2021-07-09 18:42:49,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-07-09 18:42:49,353 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:49,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:49,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1959694861, now seen corresponding path program 148 times [2021-07-09 18:42:49,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:49,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873582732] [2021-07-09 18:42:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:49,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:49,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873582732] [2021-07-09 18:42:49,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873582732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:49,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722561706] [2021-07-09 18:42:49,392 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 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 [2021-07-09 18:42:49,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:49,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:49,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:49,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:49,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722561706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:49,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:49,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:42:49,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384245184] [2021-07-09 18:42:49,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:42:49,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:49,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:42:49,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:42:49,481 INFO L87 Difference]: Start difference. First operand 43235 states and 166919 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) [2021-07-09 18:42:50,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:50,755 INFO L93 Difference]: Finished difference Result 60717 states and 226269 transitions. [2021-07-09 18:42:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:42:50,755 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 [2021-07-09 18:42:50,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:50,978 INFO L225 Difference]: With dead ends: 60717 [2021-07-09 18:42:50,978 INFO L226 Difference]: Without dead ends: 60677 [2021-07-09 18:42:50,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:42:51,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60677 states. [2021-07-09 18:42:52,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60677 to 43367. [2021-07-09 18:42:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43367 states, 43366 states have (on average 3.860143891527925) internal successors, (167399), 43366 states have internal predecessors, (167399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43367 states to 43367 states and 167399 transitions. [2021-07-09 18:42:52,719 INFO L78 Accepts]: Start accepts. Automaton has 43367 states and 167399 transitions. Word has length 28 [2021-07-09 18:42:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:52,719 INFO L482 AbstractCegarLoop]: Abstraction has 43367 states and 167399 transitions. [2021-07-09 18:42:52,719 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) [2021-07-09 18:42:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 43367 states and 167399 transitions. [2021-07-09 18:42:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:52,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:52,805 INFO L508 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] [2021-07-09 18:42:53,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4011,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:53,005 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:53,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:53,005 INFO L82 PathProgramCache]: Analyzing trace with hash 243917385, now seen corresponding path program 149 times [2021-07-09 18:42:53,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:53,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141115920] [2021-07-09 18:42:53,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:53,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:53,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141115920] [2021-07-09 18:42:53,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141115920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:53,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335204514] [2021-07-09 18:42:53,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:42:53,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:42:53,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:53,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:53,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335204514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:53,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:53,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:42:53,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566099285] [2021-07-09 18:42:53,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:42:53,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:53,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:42:53,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:42:53,176 INFO L87 Difference]: Start difference. First operand 43367 states and 167399 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) [2021-07-09 18:42:54,067 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-09 18:42:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:54,808 INFO L93 Difference]: Finished difference Result 59965 states and 224001 transitions. [2021-07-09 18:42:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:42:54,808 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 [2021-07-09 18:42:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:55,174 INFO L225 Difference]: With dead ends: 59965 [2021-07-09 18:42:55,174 INFO L226 Difference]: Without dead ends: 59965 [2021-07-09 18:42:55,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 969.2ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:42:55,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59965 states. [2021-07-09 18:42:56,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59965 to 44272. [2021-07-09 18:42:56,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44272 states, 44271 states have (on average 3.8506019742043325) internal successors, (170470), 44271 states have internal predecessors, (170470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44272 states to 44272 states and 170470 transitions. [2021-07-09 18:42:56,616 INFO L78 Accepts]: Start accepts. Automaton has 44272 states and 170470 transitions. Word has length 28 [2021-07-09 18:42:56,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:56,616 INFO L482 AbstractCegarLoop]: Abstraction has 44272 states and 170470 transitions. [2021-07-09 18:42:56,616 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) [2021-07-09 18:42:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 44272 states and 170470 transitions. [2021-07-09 18:42:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:42:56,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:56,702 INFO L508 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] [2021-07-09 18:42:56,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4012 [2021-07-09 18:42:56,905 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956539, now seen corresponding path program 150 times [2021-07-09 18:42:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:56,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414016233] [2021-07-09 18:42:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:56,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:56,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414016233] [2021-07-09 18:42:56,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414016233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:56,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118328501] [2021-07-09 18:42:56,943 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 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 [2021-07-09 18:42:56,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:42:56,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:56,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:42:56,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:57,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118328501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:57,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:57,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:42:57,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81952089] [2021-07-09 18:42:57,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:42:57,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:57,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:42:57,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:42:57,063 INFO L87 Difference]: Start difference. First operand 44272 states and 170470 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) [2021-07-09 18:42:57,699 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-07-09 18:42:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:58,705 INFO L93 Difference]: Finished difference Result 59467 states and 222606 transitions. [2021-07-09 18:42:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:42:58,705 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 [2021-07-09 18:42:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:58,956 INFO L225 Difference]: With dead ends: 59467 [2021-07-09 18:42:58,956 INFO L226 Difference]: Without dead ends: 59459 [2021-07-09 18:42:58,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 851.6ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:42:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59459 states.