/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:44:38,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:44:38,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:44:38,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:44:38,839 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 [2021-06-05 23:44:38,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:44:38,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:44:38,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:44:38,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:44:38,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:44:38,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:44:38,878 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:44:38,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:44:38,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:44:38,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:44:38,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:44:38,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:44:38,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:44:38,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:44:38,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:44:38,880 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:44:38,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:44:38,880 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:44:38,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:44:38,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:44:38,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:44:38,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:44:38,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:44:38,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:44:38,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:44:38,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:44:38,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:44:38,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:44:38,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:44:38,882 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:44:38,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:44:38,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:44:39,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:44:39,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:44:39,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:44:39,195 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:44:39,198 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:44:39,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl [2021-06-05 23:44:39,199 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl' [2021-06-05 23:44:39,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:44:39,222 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:44:39,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:44:39,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:44:39,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:44:39,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:39" (1/1) ... [2021-06-05 23:44:39,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:39" (1/1) ... [2021-06-05 23:44:39,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:44:39,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:44:39,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:44:39,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:44:39,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:39" (1/1) ... [2021-06-05 23:44:39,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:39" (1/1) ... [2021-06-05 23:44:39,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:39" (1/1) ... [2021-06-05 23:44:39,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:39" (1/1) ... [2021-06-05 23:44:39,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:39" (1/1) ... [2021-06-05 23:44:39,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:39" (1/1) ... [2021-06-05 23:44:39,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:39" (1/1) ... [2021-06-05 23:44:39,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:44:39,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:44:39,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:44:39,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:44:39,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:44:39,330 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:44:39,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:44:39,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:44:39,331 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:44:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:44:39,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:44:39,331 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:44:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:44:39,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:44:39,332 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:44:39,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:44:39,575 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:44:39,577 INFO L202 PluginConnector]: Adding new model dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:44:39 BoogieIcfgContainer [2021-06-05 23:44:39,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:44:39,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:44:39,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:44:39,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:44:39,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:39" (1/2) ... [2021-06-05 23:44:39,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87ed38f and model type dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:44:39, skipping insertion in model container [2021-06-05 23:44:39,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:44:39" (2/2) ... [2021-06-05 23:44:39,583 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq.wvr.bpl [2021-06-05 23:44:39,587 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:44:39,588 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:44:39,588 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:44:39,605 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:44:39,631 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 23:44:39,649 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 23:44:39,682 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:44:39,682 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:44:39,682 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:44:39,683 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:44:39,683 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:44:39,683 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:44:39,683 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:44:39,683 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:44:39,690 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-06-05 23:44:39,702 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 23:44:39,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:39,711 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:39,711 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:39,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-06-05 23:44:39,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:39,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389906955] [2021-06-05 23:44:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:39,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:39,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389906955] [2021-06-05 23:44:39,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389906955] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:44:39,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:44:39,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:44:39,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433584905] [2021-06-05 23:44:39,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:44:39,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:44:39,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:44:39,897 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:39,922 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-06-05 23:44:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:44:39,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 23:44:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:39,931 INFO L225 Difference]: With dead ends: 104 [2021-06-05 23:44:39,932 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 23:44:39,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:44:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 23:44:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-06-05 23:44:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-06-05 23:44:39,978 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-06-05 23:44:39,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:39,978 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-06-05 23:44:39,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-06-05 23:44:39,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:44:39,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:39,980 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:39,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:44:39,980 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-06-05 23:44:39,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:39,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620204254] [2021-06-05 23:44:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:40,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:40,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620204254] [2021-06-05 23:44:40,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620204254] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:44:40,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:44:40,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:44:40,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744612670] [2021-06-05 23:44:40,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:44:40,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:40,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:44:40,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:44:40,039 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:40,062 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-06-05 23:44:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:44:40,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 23:44:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:40,064 INFO L225 Difference]: With dead ends: 91 [2021-06-05 23:44:40,064 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 23:44:40,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:44:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 23:44:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-06-05 23:44:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-06-05 23:44:40,074 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-06-05 23:44:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:40,074 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-06-05 23:44:40,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-06-05 23:44:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:44:40,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:40,076 INFO L554 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] [2021-06-05 23:44:40,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:44:40,076 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:40,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-06-05 23:44:40,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:40,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824506048] [2021-06-05 23:44:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:40,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:40,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824506048] [2021-06-05 23:44:40,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824506048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:40,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616599043] [2021-06-05 23:44:40,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:40,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:44:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:40,502 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 13 treesize of output 9 [2021-06-05 23:44:40,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:40,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:40,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:40,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 23:44:40,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:44:40,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:40,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:40,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:40,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-06-05 23:44:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:40,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616599043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:40,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:40,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 23:44:40,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779128402] [2021-06-05 23:44:40,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:44:40,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:40,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:44:40,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:44:40,561 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:40,684 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-06-05 23:44:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:44:40,685 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) 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 23 [2021-06-05 23:44:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:40,691 INFO L225 Difference]: With dead ends: 154 [2021-06-05 23:44:40,691 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 23:44:40,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:44:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 23:44:40,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-06-05 23:44:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:40,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-06-05 23:44:40,708 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-06-05 23:44:40,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:40,709 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-06-05 23:44:40,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:40,709 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-06-05 23:44:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:44:40,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:40,710 INFO L554 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] [2021-06-05 23:44:40,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 23:44:40,927 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:40,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-06-05 23:44:40,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:40,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834911711] [2021-06-05 23:44:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:41,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:41,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834911711] [2021-06-05 23:44:41,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834911711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:41,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596441980] [2021-06-05 23:44:41,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:41,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:41,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:44:41,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:41,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596441980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:41,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:41,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 23:44:41,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764411783] [2021-06-05 23:44:41,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:44:41,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:41,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:44:41,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:44:41,140 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:41,223 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-06-05 23:44:41,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:44:41,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 27 [2021-06-05 23:44:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:41,225 INFO L225 Difference]: With dead ends: 284 [2021-06-05 23:44:41,226 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 23:44:41,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:44:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 23:44:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-06-05 23:44:41,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-06-05 23:44:41,255 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-06-05 23:44:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:41,255 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-06-05 23:44:41,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-06-05 23:44:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:44:41,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:41,258 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:41,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:41,477 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:41,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:41,478 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-06-05 23:44:41,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:41,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128473858] [2021-06-05 23:44:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:41,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:41,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128473858] [2021-06-05 23:44:41,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128473858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:41,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502864818] [2021-06-05 23:44:41,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:41,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:44:41,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:41,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:44:41,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:42,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:42,107 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 29 treesize of output 27 [2021-06-05 23:44:42,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:42,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:42,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:42,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-06-05 23:44:42,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:42,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2021-06-05 23:44:42,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:42,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:42,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:42,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-06-05 23:44:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:42,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502864818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:42,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:42,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-06-05 23:44:42,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534900520] [2021-06-05 23:44:42,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:44:42,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:42,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:44:42,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:42,527 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:44,448 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-06-05 23:44:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:44:44,449 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:44:44,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:44,452 INFO L225 Difference]: With dead ends: 650 [2021-06-05 23:44:44,452 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 23:44:44,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1622.9ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:44:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 23:44:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-06-05 23:44:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-06-05 23:44:44,468 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-06-05 23:44:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:44,469 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-06-05 23:44:44,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:44,469 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-06-05 23:44:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:44:44,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:44,472 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:44,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:44,693 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:44,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-06-05 23:44:44,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:44,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534144420] [2021-06-05 23:44:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:44:44,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:44,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534144420] [2021-06-05 23:44:44,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534144420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:44,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670869140] [2021-06-05 23:44:44,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:44,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:44,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:44,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:44:44,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:45,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:45,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 23:44:45,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:45,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:45,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:45,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 23:44:45,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:45,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:45,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 23:44:45,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:45,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:45,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:45,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 23:44:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:45,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670869140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:45,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:45,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 23:44:45,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279373655] [2021-06-05 23:44:45,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:44:45,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:44:45,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:44:45,441 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:46,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:46,175 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-06-05 23:44:46,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:44:46,176 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:44:46,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:46,180 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 23:44:46,180 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 23:44:46,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 638.6ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:44:46,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 23:44:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-06-05 23:44:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-06-05 23:44:46,196 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-06-05 23:44:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:46,196 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-06-05 23:44:46,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-06-05 23:44:46,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:44:46,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:46,197 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:46,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:46,417 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-06-05 23:44:46,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:46,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783388083] [2021-06-05 23:44:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:46,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:46,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783388083] [2021-06-05 23:44:46,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783388083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:46,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431625241] [2021-06-05 23:44:46,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:46,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:44:46,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:46,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:44:46,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:46,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:46,943 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 24 treesize of output 24 [2021-06-05 23:44:46,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:46,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:46,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:46,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-05 23:44:47,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:47,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:47,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:44:47,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:47,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:47,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:47,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 23:44:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:47,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431625241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:47,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:47,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 23:44:47,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145030514] [2021-06-05 23:44:47,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:44:47,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:47,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:44:47,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:44:47,107 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:47,921 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-06-05 23:44:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:44:47,922 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:44:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:47,926 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 23:44:47,926 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 23:44:47,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 692.8ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:44:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 23:44:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-06-05 23:44:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-06-05 23:44:47,948 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-06-05 23:44:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:47,949 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-06-05 23:44:47,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-06-05 23:44:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:44:47,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:47,950 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:48,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:44:48,165 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:48,166 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-06-05 23:44:48,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:48,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85260656] [2021-06-05 23:44:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:44:48,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:48,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85260656] [2021-06-05 23:44:48,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85260656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:48,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221096475] [2021-06-05 23:44:48,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:48,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:44:48,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:44:48,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:48,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:48,723 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 24 treesize of output 24 [2021-06-05 23:44:48,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:48,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:48,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:48,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-05 23:44:48,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:48,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:48,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:48,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 23:44:48,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:48,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:48,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:48,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 23:44:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:48,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221096475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:48,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:48,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-06-05 23:44:48,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919388961] [2021-06-05 23:44:48,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:48,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:48,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:48,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:48,835 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:49,378 INFO L93 Difference]: Finished difference Result 1039 states and 2202 transitions. [2021-06-05 23:44:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:44:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:44:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:49,382 INFO L225 Difference]: With dead ends: 1039 [2021-06-05 23:44:49,382 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 23:44:49,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 527.3ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:44:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 23:44:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 487. [2021-06-05 23:44:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1790123456790123) internal successors, (1059), 486 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1059 transitions. [2021-06-05 23:44:49,397 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1059 transitions. Word has length 32 [2021-06-05 23:44:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:49,397 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1059 transitions. [2021-06-05 23:44:49,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:49,397 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1059 transitions. [2021-06-05 23:44:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:44:49,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:49,398 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:49,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:49,613 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:49,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-06-05 23:44:49,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:49,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354042681] [2021-06-05 23:44:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:49,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:49,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354042681] [2021-06-05 23:44:49,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354042681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:49,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571203540] [2021-06-05 23:44:49,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:49,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:44:49,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:50,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:50,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 23:44:50,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:50,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:50,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:50,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 23:44:50,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:50,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:50,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:50,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 23:44:50,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:50,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:50,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:50,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 23:44:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:50,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571203540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:50,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:50,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 23:44:50,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680232796] [2021-06-05 23:44:50,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:44:50,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:50,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:44:50,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:44:50,265 INFO L87 Difference]: Start difference. First operand 487 states and 1059 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:50,865 INFO L93 Difference]: Finished difference Result 1050 states and 2227 transitions. [2021-06-05 23:44:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:44:50,866 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:44:50,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:50,871 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 23:44:50,871 INFO L226 Difference]: Without dead ends: 952 [2021-06-05 23:44:50,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 553.3ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:44:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-06-05 23:44:50,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 467. [2021-06-05 23:44:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.1609442060085837) internal successors, (1007), 466 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1007 transitions. [2021-06-05 23:44:50,884 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1007 transitions. Word has length 32 [2021-06-05 23:44:50,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:50,884 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1007 transitions. [2021-06-05 23:44:50,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1007 transitions. [2021-06-05 23:44:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:44:50,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:50,887 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:51,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:51,110 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:51,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:51,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-06-05 23:44:51,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:51,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587705308] [2021-06-05 23:44:51,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:51,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:51,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587705308] [2021-06-05 23:44:51,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587705308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:51,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29586459] [2021-06-05 23:44:51,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:51,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:51,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:51,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:44:51,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:51,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29586459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:51,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:51,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-05 23:44:51,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734068570] [2021-06-05 23:44:51,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:44:51,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:51,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:44:51,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:44:51,266 INFO L87 Difference]: Start difference. First operand 467 states and 1007 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:51,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:51,341 INFO L93 Difference]: Finished difference Result 885 states and 1908 transitions. [2021-06-05 23:44:51,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:44:51,341 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 23:44:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:51,344 INFO L225 Difference]: With dead ends: 885 [2021-06-05 23:44:51,344 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 23:44:51,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:44:51,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 23:44:51,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 716. [2021-06-05 23:44:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.1846153846153844) internal successors, (1562), 715 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1562 transitions. [2021-06-05 23:44:51,359 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1562 transitions. Word has length 36 [2021-06-05 23:44:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:51,359 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1562 transitions. [2021-06-05 23:44:51,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:51,360 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1562 transitions. [2021-06-05 23:44:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:44:51,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:51,362 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:51,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 23:44:51,573 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:51,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-06-05 23:44:51,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:51,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736483262] [2021-06-05 23:44:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:51,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:51,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736483262] [2021-06-05 23:44:51,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736483262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:51,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954503063] [2021-06-05 23:44:51,925 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:51,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:44:51,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:51,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 23:44:51,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:52,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:52,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2021-06-05 23:44:52,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:52,375 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.3 percent of original size [2021-06-05 23:44:52,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:52,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:32 [2021-06-05 23:44:52,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:52,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:52,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:52,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:52,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 43 [2021-06-05 23:44:52,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:52,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:52,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:52,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-06-05 23:44:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:52,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954503063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:52,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:52,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 23:44:52,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443819131] [2021-06-05 23:44:52,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 23:44:52,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:52,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 23:44:52,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:44:52,830 INFO L87 Difference]: Start difference. First operand 716 states and 1562 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:56,777 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-06-05 23:44:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:44:56,777 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:44:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:56,786 INFO L225 Difference]: With dead ends: 2812 [2021-06-05 23:44:56,786 INFO L226 Difference]: Without dead ends: 2548 [2021-06-05 23:44:56,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 3028.6ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 23:44:56,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-05 23:44:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-06-05 23:44:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-06-05 23:44:56,811 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-06-05 23:44:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:56,812 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-06-05 23:44:56,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-06-05 23:44:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:44:56,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:56,813 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:57,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:57,029 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:57,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-06-05 23:44:57,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:57,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159227005] [2021-06-05 23:44:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:44:57,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:57,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159227005] [2021-06-05 23:44:57,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159227005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:57,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696112528] [2021-06-05 23:44:57,432 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:57,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:57,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:57,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:44:57,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:58,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:58,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 23:44:58,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:58,251 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 23:44:58,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:58,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 23:44:58,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:58,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:58,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:58,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:58,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 23:44:58,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:58,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:58,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:58,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:58,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 23:44:58,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:58,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:58,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:58,698 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-06-05 23:44:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:58,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696112528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:58,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:58,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 23:44:58,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174876181] [2021-06-05 23:44:58,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:44:58,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:58,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:44:58,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:44:58,710 INFO L87 Difference]: Start difference. First operand 737 states and 1581 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:00,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:00,779 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-06-05 23:45:00,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:45:00,779 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:45:00,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:00,786 INFO L225 Difference]: With dead ends: 2302 [2021-06-05 23:45:00,786 INFO L226 Difference]: Without dead ends: 2145 [2021-06-05 23:45:00,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1927.4ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:45:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-05 23:45:00,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-06-05 23:45:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-06-05 23:45:00,809 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-06-05 23:45:00,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:00,810 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-06-05 23:45:00,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:00,810 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-06-05 23:45:00,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:45:00,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:00,811 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:01,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:01,034 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:01,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:01,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-06-05 23:45:01,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:01,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724258559] [2021-06-05 23:45:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:01,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:01,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724258559] [2021-06-05 23:45:01,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724258559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:01,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278630693] [2021-06-05 23:45:01,435 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:01,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:45:01,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:01,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:45:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:02,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:02,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 23:45:02,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:02,135 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.0 percent of original size [2021-06-05 23:45:02,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:02,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:57 [2021-06-05 23:45:02,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:02,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:02,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:02,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:02,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:02,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:02,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:02,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:02,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 23:45:02,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:02,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:02,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:02,411 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:5 [2021-06-05 23:45:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:02,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278630693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:02,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:02,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 23:45:02,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597122368] [2021-06-05 23:45:02,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:45:02,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:02,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:45:02,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:45:02,425 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:05,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:05,110 INFO L93 Difference]: Finished difference Result 2586 states and 5448 transitions. [2021-06-05 23:45:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:45:05,110 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:45:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:05,117 INFO L225 Difference]: With dead ends: 2586 [2021-06-05 23:45:05,117 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 23:45:05,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 2152.0ms TimeCoverageRelationStatistics Valid=836, Invalid=5326, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:45:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 23:45:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 746. [2021-06-05 23:45:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.153020134228188) internal successors, (1604), 745 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1604 transitions. [2021-06-05 23:45:05,139 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1604 transitions. Word has length 41 [2021-06-05 23:45:05,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:05,139 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1604 transitions. [2021-06-05 23:45:05,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1604 transitions. [2021-06-05 23:45:05,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:45:05,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:05,141 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:05,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:05,364 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:05,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:05,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-06-05 23:45:05,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:05,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122993407] [2021-06-05 23:45:05,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:45:05,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:05,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122993407] [2021-06-05 23:45:05,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122993407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:05,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936858333] [2021-06-05 23:45:05,743 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:05,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:45:05,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:45:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:06,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:06,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 23:45:06,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:06,650 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.7 percent of original size [2021-06-05 23:45:06,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:06,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:52, output treesize:53 [2021-06-05 23:45:08,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:08,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:08,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:08,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:08,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:08,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2021-06-05 23:45:09,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:45:09,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:09,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:09,058 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-06-05 23:45:09,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 1 [2021-06-05 23:45:09,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:09,093 INFO L628 ElimStorePlain]: treesize reduction 21, result has 59.6 percent of original size [2021-06-05 23:45:09,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:09,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:100, output treesize:21 [2021-06-05 23:45:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:09,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936858333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:09,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:09,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 23:45:09,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311397270] [2021-06-05 23:45:09,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:45:09,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:09,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:45:09,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:45:09,205 INFO L87 Difference]: Start difference. First operand 746 states and 1604 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:12,534 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 23:45:13,689 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 23:45:14,431 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 23:45:14,860 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 23:45:15,521 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 23:45:16,231 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 23:45:19,000 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 23:45:21,238 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 23:45:23,023 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-05 23:45:24,674 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 23:45:24,981 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-05 23:45:25,947 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 23:45:26,614 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 23:45:27,255 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 23:45:28,712 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-06-05 23:45:35,499 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 23:45:35,908 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 23:45:37,835 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 23:45:38,714 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 23:45:42,689 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 23:45:47,349 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 23:45:50,997 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 23:45:52,031 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 23:45:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:53,464 INFO L93 Difference]: Finished difference Result 3393 states and 7212 transitions. [2021-06-05 23:45:53,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 23:45:53,465 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:45:53,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:53,475 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 23:45:53,475 INFO L226 Difference]: Without dead ends: 3071 [2021-06-05 23:45:53,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5845 ImplicationChecksByTransitivity, 26854.1ms TimeCoverageRelationStatistics Valid=2687, Invalid=14343, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 23:45:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-06-05 23:45:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 882. [2021-06-05 23:45:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.155505107832009) internal successors, (1899), 881 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1899 transitions. [2021-06-05 23:45:53,506 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1899 transitions. Word has length 41 [2021-06-05 23:45:53,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:53,507 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 1899 transitions. [2021-06-05 23:45:53,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:53,507 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1899 transitions. [2021-06-05 23:45:53,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:45:53,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:53,509 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:53,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:53,729 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:53,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:53,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-06-05 23:45:53,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:53,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935922450] [2021-06-05 23:45:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:45:54,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:54,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935922450] [2021-06-05 23:45:54,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935922450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:54,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218574618] [2021-06-05 23:45:54,090 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:54,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:45:54,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:54,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:54,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 23:45:54,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:54,914 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-06-05 23:45:54,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:54,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-06-05 23:45:55,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:55,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:55,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:55,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:55,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:55,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:55,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:55,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 23:45:55,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:55,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:55,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:55,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 23:45:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:55,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218574618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:55,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:55,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 23:45:55,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255362966] [2021-06-05 23:45:55,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:45:55,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:55,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:45:55,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:45:55,038 INFO L87 Difference]: Start difference. First operand 882 states and 1899 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:57,091 INFO L93 Difference]: Finished difference Result 3308 states and 7100 transitions. [2021-06-05 23:45:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:45:57,091 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:45:57,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:57,102 INFO L225 Difference]: With dead ends: 3308 [2021-06-05 23:45:57,102 INFO L226 Difference]: Without dead ends: 3100 [2021-06-05 23:45:57,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1689.5ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:45:57,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-06-05 23:45:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1074. [2021-06-05 23:45:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.1491146318732524) internal successors, (2306), 1073 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:57,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2306 transitions. [2021-06-05 23:45:57,132 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2306 transitions. Word has length 41 [2021-06-05 23:45:57,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:57,132 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 2306 transitions. [2021-06-05 23:45:57,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:57,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2306 transitions. [2021-06-05 23:45:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:45:57,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:57,134 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:57,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 23:45:57,337 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:57,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-06-05 23:45:57,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:57,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645278964] [2021-06-05 23:45:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:57,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:57,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645278964] [2021-06-05 23:45:57,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645278964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:57,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753176435] [2021-06-05 23:45:57,723 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:57,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:45:57,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:57,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:45:57,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:58,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:58,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 23:45:58,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:58,412 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 23:45:58,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:58,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 23:45:58,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:58,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:58,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:58,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:58,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:58,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:58,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:58,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:58,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 23:45:58,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:58,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:58,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:58,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 23:45:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:58,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753176435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:58,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:58,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 23:45:58,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583422286] [2021-06-05 23:45:58,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:45:58,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:58,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:45:58,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:45:58,586 INFO L87 Difference]: Start difference. First operand 1074 states and 2306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:01,239 INFO L93 Difference]: Finished difference Result 3729 states and 7998 transitions. [2021-06-05 23:46:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:46:01,239 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:46:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:01,250 INFO L225 Difference]: With dead ends: 3729 [2021-06-05 23:46:01,250 INFO L226 Difference]: Without dead ends: 3485 [2021-06-05 23:46:01,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1944.3ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:46:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-06-05 23:46:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 1340. [2021-06-05 23:46:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.1598207617625094) internal successors, (2892), 1339 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2892 transitions. [2021-06-05 23:46:01,285 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2892 transitions. Word has length 41 [2021-06-05 23:46:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:01,285 INFO L482 AbstractCegarLoop]: Abstraction has 1340 states and 2892 transitions. [2021-06-05 23:46:01,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2892 transitions. [2021-06-05 23:46:01,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:46:01,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:01,288 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:01,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:01,509 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:01,509 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-06-05 23:46:01,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:01,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915055483] [2021-06-05 23:46:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:01,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:01,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915055483] [2021-06-05 23:46:01,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915055483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:01,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993940654] [2021-06-05 23:46:01,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:01,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:46:01,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:01,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 23:46:01,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:02,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:02,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 23:46:02,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:02,515 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.4 percent of original size [2021-06-05 23:46:02,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:02,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:57 [2021-06-05 23:46:02,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:02,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:02,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:02,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:02,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:02,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-06-05 23:46:02,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:46:02,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:02,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:02,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:02,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:02,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:03,019 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-06-05 23:46:03,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 23:46:03,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:03,086 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-06-05 23:46:03,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:46:03,099 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-06-05 23:46:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:03,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993940654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:03,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:03,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-06-05 23:46:03,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39821551] [2021-06-05 23:46:03,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:46:03,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:03,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:46:03,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:46:03,212 INFO L87 Difference]: Start difference. First operand 1340 states and 2892 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:06,689 INFO L93 Difference]: Finished difference Result 3544 states and 7640 transitions. [2021-06-05 23:46:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:46:06,689 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:46:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:06,695 INFO L225 Difference]: With dead ends: 3544 [2021-06-05 23:46:06,695 INFO L226 Difference]: Without dead ends: 3383 [2021-06-05 23:46:06,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 3013.5ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:46:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-06-05 23:46:06,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 1483. [2021-06-05 23:46:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.163292847503374) internal successors, (3206), 1482 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3206 transitions. [2021-06-05 23:46:06,731 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3206 transitions. Word has length 41 [2021-06-05 23:46:06,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:06,731 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 3206 transitions. [2021-06-05 23:46:06,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:06,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3206 transitions. [2021-06-05 23:46:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:46:06,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:06,734 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:06,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 23:46:06,958 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:06,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-06-05 23:46:06,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:06,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676917311] [2021-06-05 23:46:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:07,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:07,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676917311] [2021-06-05 23:46:07,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676917311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:07,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277447716] [2021-06-05 23:46:07,023 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:07,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:46:07,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:46:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:07,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277447716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:07,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:07,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-05 23:46:07,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346844031] [2021-06-05 23:46:07,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:46:07,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:07,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:46:07,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:46:07,158 INFO L87 Difference]: Start difference. First operand 1483 states and 3206 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:07,253 INFO L93 Difference]: Finished difference Result 2019 states and 4365 transitions. [2021-06-05 23:46:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:46:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:46:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:07,262 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 23:46:07,263 INFO L226 Difference]: Without dead ends: 1969 [2021-06-05 23:46:07,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:46:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2021-06-05 23:46:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1621. [2021-06-05 23:46:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.175925925925926) internal successors, (3525), 1620 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3525 transitions. [2021-06-05 23:46:07,305 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3525 transitions. Word has length 45 [2021-06-05 23:46:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:07,305 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3525 transitions. [2021-06-05 23:46:07,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:07,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3525 transitions. [2021-06-05 23:46:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 23:46:07,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:07,309 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:07,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:07,533 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-06-05 23:46:07,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:07,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463877314] [2021-06-05 23:46:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 23:46:07,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:07,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463877314] [2021-06-05 23:46:07,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463877314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:07,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585816001] [2021-06-05 23:46:07,563 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:07,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:46:07,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:07,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:46:07,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:46:07,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585816001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:07,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:07,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 23:46:07,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649946664] [2021-06-05 23:46:07,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:46:07,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:07,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:46:07,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:46:07,649 INFO L87 Difference]: Start difference. First operand 1621 states and 3525 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:07,669 INFO L93 Difference]: Finished difference Result 2104 states and 4548 transitions. [2021-06-05 23:46:07,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:46:07,669 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 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 46 [2021-06-05 23:46:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:07,672 INFO L225 Difference]: With dead ends: 2104 [2021-06-05 23:46:07,672 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 23:46:07,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:46:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 23:46:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1445. [2021-06-05 23:46:07,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.1717451523545708) internal successors, (3136), 1444 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 3136 transitions. [2021-06-05 23:46:07,698 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 3136 transitions. Word has length 46 [2021-06-05 23:46:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:07,698 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 3136 transitions. [2021-06-05 23:46:07,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 3136 transitions. [2021-06-05 23:46:07,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 23:46:07,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:07,701 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:07,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:07,921 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-06-05 23:46:07,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:07,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822210649] [2021-06-05 23:46:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:46:07,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:07,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822210649] [2021-06-05 23:46:07,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822210649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:07,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482257744] [2021-06-05 23:46:07,957 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:07,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:46:07,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:46:07,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:46:08,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482257744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:08,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:08,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 23:46:08,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196209043] [2021-06-05 23:46:08,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:46:08,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:08,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:46:08,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:46:08,055 INFO L87 Difference]: Start difference. First operand 1445 states and 3136 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:08,086 INFO L93 Difference]: Finished difference Result 1604 states and 3442 transitions. [2021-06-05 23:46:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:46:08,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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 46 [2021-06-05 23:46:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:08,089 INFO L225 Difference]: With dead ends: 1604 [2021-06-05 23:46:08,089 INFO L226 Difference]: Without dead ends: 1604 [2021-06-05 23:46:08,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:46:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-06-05 23:46:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1207. [2021-06-05 23:46:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 2.1550580431177444) internal successors, (2599), 1206 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2599 transitions. [2021-06-05 23:46:08,109 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2599 transitions. Word has length 46 [2021-06-05 23:46:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:08,109 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2599 transitions. [2021-06-05 23:46:08,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2599 transitions. [2021-06-05 23:46:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 23:46:08,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:08,112 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:08,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 23:46:08,325 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:08,325 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-06-05 23:46:08,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:08,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621148030] [2021-06-05 23:46:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:08,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:08,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621148030] [2021-06-05 23:46:08,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621148030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:08,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41405690] [2021-06-05 23:46:08,991 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:09,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:46:09,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:09,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:09,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2021-06-05 23:46:09,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:09,671 INFO L628 ElimStorePlain]: treesize reduction 86, result has 58.7 percent of original size [2021-06-05 23:46:09,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:09,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:48 [2021-06-05 23:46:10,090 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:46:10,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-06-05 23:46:10,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:10,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:10,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:10,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-06-05 23:46:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:10,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41405690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:10,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:10,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-06-05 23:46:10,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224608863] [2021-06-05 23:46:10,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 23:46:10,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:10,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 23:46:10,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:46:10,105 INFO L87 Difference]: Start difference. First operand 1207 states and 2599 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:13,665 INFO L93 Difference]: Finished difference Result 2755 states and 5872 transitions. [2021-06-05 23:46:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:46:13,665 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 23:46:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:13,669 INFO L225 Difference]: With dead ends: 2755 [2021-06-05 23:46:13,669 INFO L226 Difference]: Without dead ends: 2659 [2021-06-05 23:46:13,670 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2806.5ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:46:13,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-06-05 23:46:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 1299. [2021-06-05 23:46:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.1656394453004624) internal successors, (2811), 1298 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2811 transitions. [2021-06-05 23:46:13,695 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2811 transitions. Word has length 50 [2021-06-05 23:46:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:13,695 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 2811 transitions. [2021-06-05 23:46:13,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2811 transitions. [2021-06-05 23:46:13,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 23:46:13,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:13,698 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:13,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:13,920 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:13,920 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-06-05 23:46:13,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:13,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286778493] [2021-06-05 23:46:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:46:14,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:14,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286778493] [2021-06-05 23:46:14,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286778493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:14,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983327448] [2021-06-05 23:46:14,418 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:14,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:46:14,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:14,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:46:14,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:15,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:15,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-06-05 23:46:15,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:15,746 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-06-05 23:46:15,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:15,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-06-05 23:46:16,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:16,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:16,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:16,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:16,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-06-05 23:46:16,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:16,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:16,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:16,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:16,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 23:46:16,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:16,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:16,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:16,353 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-06-05 23:46:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:16,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983327448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:16,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:16,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-06-05 23:46:16,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397468772] [2021-06-05 23:46:16,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 23:46:16,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:16,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 23:46:16,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:46:16,363 INFO L87 Difference]: Start difference. First operand 1299 states and 2811 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:21,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:21,658 INFO L93 Difference]: Finished difference Result 3297 states and 7007 transitions. [2021-06-05 23:46:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 23:46:21,658 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 23:46:21,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:21,663 INFO L225 Difference]: With dead ends: 3297 [2021-06-05 23:46:21,663 INFO L226 Difference]: Without dead ends: 3184 [2021-06-05 23:46:21,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4563.5ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 23:46:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-06-05 23:46:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 1653. [2021-06-05 23:46:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.151331719128329) internal successors, (3554), 1652 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3554 transitions. [2021-06-05 23:46:21,696 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3554 transitions. Word has length 50 [2021-06-05 23:46:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:21,696 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 3554 transitions. [2021-06-05 23:46:21,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:21,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3554 transitions. [2021-06-05 23:46:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 23:46:21,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:21,700 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:21,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 23:46:21,923 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:21,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-06-05 23:46:21,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:21,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847178104] [2021-06-05 23:46:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:22,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:22,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847178104] [2021-06-05 23:46:22,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847178104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:22,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451056242] [2021-06-05 23:46:22,441 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:22,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:46:22,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:22,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:46:22,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:25,040 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 23:46:25,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:25,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 23:46:25,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:25,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:25,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 23:46:25,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:25,425 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2021-06-05 23:46:25,426 INFO L628 ElimStorePlain]: treesize reduction 124, result has 69.2 percent of original size [2021-06-05 23:46:25,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-06-05 23:46:25,530 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:150 [2021-06-05 23:46:36,881 WARN L205 SmtUtils]: Spent 8.78 s on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 23:46:55,236 WARN L205 SmtUtils]: Spent 12.58 s on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 23:46:55,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:55,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:55,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:55,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:55,599 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-06-05 23:46:55,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-06-05 23:46:56,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:56,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:56,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:56,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:56,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:56,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-06-05 23:46:56,847 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 176 [2021-06-05 23:46:57,762 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-06-05 23:46:57,983 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-06-05 23:46:58,190 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 269 [2021-06-05 23:46:59,150 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 60 [2021-06-05 23:46:59,377 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 60 [2021-06-05 23:46:59,627 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 61 [2021-06-05 23:46:59,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:59,898 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 73 [2021-06-05 23:46:59,899 INFO L628 ElimStorePlain]: treesize reduction 474, result has 24.8 percent of original size [2021-06-05 23:46:59,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 23:46:59,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:47 [2021-06-05 23:47:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:00,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451056242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:00,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:00,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-06-05 23:47:00,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099337588] [2021-06-05 23:47:00,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:47:00,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:00,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:47:00,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2269, Unknown=2, NotChecked=0, Total=2550 [2021-06-05 23:47:00,107 INFO L87 Difference]: Start difference. First operand 1653 states and 3554 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:13,747 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 23:47:21,193 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 137 DAG size of output: 40 [2021-06-05 23:47:22,148 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 23:47:30,937 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 142 DAG size of output: 42 [2021-06-05 23:47:33,846 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 23:47:48,094 WARN L205 SmtUtils]: Spent 6.78 s on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2021-06-05 23:47:52,498 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 23:48:00,568 WARN L205 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 23:48:08,755 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-06-05 23:48:16,491 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 134 DAG size of output: 44 [2021-06-05 23:48:26,782 WARN L205 SmtUtils]: Spent 3.64 s on a formula simplification. DAG size of input: 126 DAG size of output: 73 [2021-06-05 23:48:35,223 WARN L205 SmtUtils]: Spent 4.60 s on a formula simplification. DAG size of input: 124 DAG size of output: 46 [2021-06-05 23:48:44,172 WARN L205 SmtUtils]: Spent 4.61 s on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-06-05 23:48:56,608 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 55 [2021-06-05 23:49:01,953 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 73 [2021-06-05 23:49:07,763 WARN L205 SmtUtils]: Spent 4.75 s on a formula simplification. DAG size of input: 126 DAG size of output: 48 [2021-06-05 23:49:19,436 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-06-05 23:49:26,105 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2021-06-05 23:49:31,444 WARN L205 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-06-05 23:49:42,530 WARN L205 SmtUtils]: Spent 5.95 s on a formula simplification. DAG size of input: 123 DAG size of output: 51 [2021-06-05 23:49:51,866 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 23:49:56,936 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-06-05 23:50:13,909 WARN L205 SmtUtils]: Spent 5.66 s on a formula simplification. DAG size of input: 125 DAG size of output: 53 [2021-06-05 23:50:28,106 WARN L205 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 131 DAG size of output: 51 [2021-06-05 23:50:40,567 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 127 DAG size of output: 68 [2021-06-05 23:50:54,190 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2021-06-05 23:51:06,997 WARN L205 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 141 DAG size of output: 51 [2021-06-05 23:51:17,522 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2021-06-05 23:51:39,628 WARN L205 SmtUtils]: Spent 8.64 s on a formula simplification. DAG size of input: 129 DAG size of output: 60 [2021-06-05 23:51:59,311 WARN L205 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2021-06-05 23:52:07,260 WARN L205 SmtUtils]: Spent 7.04 s on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2021-06-05 23:52:23,181 WARN L205 SmtUtils]: Spent 5.68 s on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-06-05 23:52:41,646 WARN L205 SmtUtils]: Spent 8.44 s on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2021-06-05 23:53:05,829 WARN L205 SmtUtils]: Spent 7.50 s on a formula simplification. DAG size of input: 134 DAG size of output: 62 [2021-06-05 23:53:14,728 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 23:53:19,952 WARN L205 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2021-06-05 23:53:54,297 WARN L205 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2021-06-05 23:54:23,210 WARN L205 SmtUtils]: Spent 11.21 s on a formula simplification. DAG size of input: 117 DAG size of output: 65 [2021-06-05 23:54:34,989 WARN L205 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-06-05 23:54:43,876 WARN L205 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-05 23:54:51,902 WARN L205 SmtUtils]: Spent 4.55 s on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-06-05 23:55:35,443 WARN L205 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 145 DAG size of output: 52 [2021-06-05 23:56:07,320 WARN L205 SmtUtils]: Spent 7.19 s on a formula simplification. DAG size of input: 102 DAG size of output: 65 [2021-06-05 23:56:20,873 WARN L205 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-06-05 23:56:26,766 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-06-05 23:56:43,716 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 120 DAG size of output: 63 [2021-06-05 23:57:02,838 WARN L205 SmtUtils]: Spent 8.35 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-06-05 23:57:30,257 WARN L205 SmtUtils]: Spent 10.89 s on a formula simplification. DAG size of input: 117 DAG size of output: 75 [2021-06-05 23:58:00,428 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 122 DAG size of output: 65 [2021-06-05 23:58:17,630 WARN L205 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-06-05 23:58:27,174 WARN L205 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-06-05 23:59:00,836 WARN L205 SmtUtils]: Spent 11.23 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 Received shutdown request... [2021-06-05 23:59:07,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 23:59:08,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 23:59:08,196 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:59:08,198 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:59:08,199 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:59:08,199 INFO L202 PluginConnector]: Adding new model dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:59:08 BasicIcfg [2021-06-05 23:59:08,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:59:08,200 INFO L168 Benchmark]: Toolchain (without parser) took 868977.52 ms. Allocated memory was 333.4 MB in the beginning and 585.1 MB in the end (delta: 251.7 MB). Free memory was 313.0 MB in the beginning and 308.1 MB in the end (delta: 4.9 MB). Peak memory consumption was 258.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:59:08,200 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 333.4 MB. Free memory was 314.2 MB in the beginning and 314.1 MB in the end (delta: 76.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:59:08,200 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.97 ms. Allocated memory is still 333.4 MB. Free memory was 312.9 MB in the beginning and 311.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:59:08,200 INFO L168 Benchmark]: Boogie Preprocessor took 13.43 ms. Allocated memory is still 333.4 MB. Free memory was 311.4 MB in the beginning and 310.5 MB in the end (delta: 959.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:59:08,200 INFO L168 Benchmark]: RCFGBuilder took 311.41 ms. Allocated memory is still 333.4 MB. Free memory was 310.4 MB in the beginning and 297.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 23:59:08,200 INFO L168 Benchmark]: TraceAbstraction took 868620.65 ms. Allocated memory was 333.4 MB in the beginning and 585.1 MB in the end (delta: 251.7 MB). Free memory was 297.1 MB in the beginning and 308.1 MB in the end (delta: -11.0 MB). Peak memory consumption was 243.4 MB. Max. memory is 16.0 GB. [2021-06-05 23:59:08,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 333.4 MB. Free memory was 314.2 MB in the beginning and 314.1 MB in the end (delta: 76.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.97 ms. Allocated memory is still 333.4 MB. Free memory was 312.9 MB in the beginning and 311.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.43 ms. Allocated memory is still 333.4 MB. Free memory was 311.4 MB in the beginning and 310.5 MB in the end (delta: 959.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 311.41 ms. Allocated memory is still 333.4 MB. Free memory was 310.4 MB in the beginning and 297.5 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 868620.65 ms. Allocated memory was 333.4 MB in the beginning and 585.1 MB in the end (delta: 251.7 MB). Free memory was 297.1 MB in the beginning and 308.1 MB in the end (delta: -11.0 MB). Peak memory consumption was 243.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1653states) and FLOYD_HOARE automaton (currently 116 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 154 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 868516.1ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 49.4ms, AutomataDifference: 803154.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1118 SDtfs, 5127 SDslu, 11797 SDs, 0 SdLazy, 28146 SolverSat, 3084 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 143380.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1807 GetRequests, 592 SyntacticMatches, 45 SemanticMatches, 1169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36117 ImplicationChecksByTransitivity, 690125.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1653occurred in iteration=22, InterpolantAutomatonStates: 750, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 512.6ms AutomataMinimizationTime, 22 MinimizatonAttempts, 19446 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 118.5ms SsaConstructionTime, 467.1ms SatisfiabilityAnalysisTime, 58973.7ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 296 QuantifiedInterpolants, 27566 SizeOfPredicates, 225 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 538 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 268/1315 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown