/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-proofs/producer-consumer-counter-3-5rN.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 20:00:00,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 20:00:00,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 20:00:00,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 20:00:00,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 20:00:00,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 20:00:00,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 20:00:00,596 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 [2021-02-19 20:00:00,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 20:00:00,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 20:00:00,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 20:00:00,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 20:00:00,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 20:00:00,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 20:00:00,622 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 20:00:00,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 20:00:00,622 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 20:00:00,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 20:00:00,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 20:00:00,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 20:00:00,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 20:00:00,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 20:00:00,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 20:00:00,624 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 20:00:00,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 20:00:00,624 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 20:00:00,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 20:00:00,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 20:00:00,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 20:00:00,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 20:00:00,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 20:00:00,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:00:00,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 20:00:00,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 20:00:00,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 20:00:00,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 20:00:00,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 20:00:00,626 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 20:00:00,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 20:00:00,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 20:00:00,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 20:00:00,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 20:00:00,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 20:00:01,000 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 20:00:01,002 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 20:00:01,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/producer-consumer-counter-3-5rN.wvr.bpl [2021-02-19 20:00:01,004 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/producer-consumer-counter-3-5rN.wvr.bpl' [2021-02-19 20:00:01,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 20:00:01,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 20:00:01,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 20:00:01,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 20:00:01,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 20:00:01,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:00:01" (1/1) ... [2021-02-19 20:00:01,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:00:01" (1/1) ... [2021-02-19 20:00:01,079 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 20:00:01,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 20:00:01,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 20:00:01,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 20:00:01,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:00:01" (1/1) ... [2021-02-19 20:00:01,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:00:01" (1/1) ... [2021-02-19 20:00:01,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:00:01" (1/1) ... [2021-02-19 20:00:01,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:00:01" (1/1) ... [2021-02-19 20:00:01,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:00:01" (1/1) ... [2021-02-19 20:00:01,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:00:01" (1/1) ... [2021-02-19 20:00:01,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:00:01" (1/1) ... [2021-02-19 20:00:01,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 20:00:01,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 20:00:01,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 20:00:01,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 20:00:01,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:00:01" (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 [2021-02-19 20:00:01,168 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 20:00:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 20:00:01,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 20:00:01,169 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 20:00:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 20:00:01,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 20:00:01,169 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 20:00:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 20:00:01,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 20:00:01,170 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 20:00:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 20:00:01,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 20:00:01,170 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 20:00:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 20:00:01,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 20:00:01,171 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 20:00:01,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 20:00:01,471 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 20:00:01,472 INFO L202 PluginConnector]: Adding new model producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:00:01 BoogieIcfgContainer [2021-02-19 20:00:01,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 20:00:01,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 20:00:01,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 20:00:01,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 20:00:01,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:00:01" (1/2) ... [2021-02-19 20:00:01,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c0cf38 and model type producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 08:00:01, skipping insertion in model container [2021-02-19 20:00:01,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:00:01" (2/2) ... [2021-02-19 20:00:01,479 INFO L111 eAbstractionObserver]: Analyzing ICFG producer-consumer-counter-3-5rN.wvr.bpl [2021-02-19 20:00:01,493 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 20:00:01,493 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 20:00:01,497 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 20:00:01,497 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 20:00:01,594 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-02-19 20:00:01,616 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-02-19 20:00:01,644 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 20:00:01,644 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 20:00:01,644 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 20:00:01,644 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 20:00:01,644 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 20:00:01,644 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 20:00:01,645 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 20:00:01,645 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 20:00:01,662 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 40 transitions, 112 flow [2021-02-19 20:00:01,737 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 755 states, 753 states have (on average 3.634794156706507) internal successors, (2737), 754 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 755 states, 753 states have (on average 3.634794156706507) internal successors, (2737), 754 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:01,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 20:00:01,766 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:01,768 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:01,769 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:01,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:01,777 INFO L82 PathProgramCache]: Analyzing trace with hash 577150175, now seen corresponding path program 1 times [2021-02-19 20:00:01,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:01,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112821082] [2021-02-19 20:00:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:01,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112821082] [2021-02-19 20:00:01,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:00:01,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 20:00:01,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767198387] [2021-02-19 20:00:01,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 20:00:01,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:01,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 20:00:01,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:00:01,946 INFO L87 Difference]: Start difference. First operand has 755 states, 753 states have (on average 3.634794156706507) internal successors, (2737), 754 states have internal predecessors, (2737), 0 states have call successors, (0), 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 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:02,003 INFO L93 Difference]: Finished difference Result 912 states and 3051 transitions. [2021-02-19 20:00:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 20:00:02,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 20:00:02,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:02,023 INFO L225 Difference]: With dead ends: 912 [2021-02-19 20:00:02,023 INFO L226 Difference]: Without dead ends: 539 [2021-02-19 20:00:02,025 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:00:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-02-19 20:00:02,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-02-19 20:00:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.163568773234201) internal successors, (1702), 538 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1702 transitions. [2021-02-19 20:00:02,105 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1702 transitions. Word has length 24 [2021-02-19 20:00:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:02,106 INFO L480 AbstractCegarLoop]: Abstraction has 539 states and 1702 transitions. [2021-02-19 20:00:02,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1702 transitions. [2021-02-19 20:00:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 20:00:02,109 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:02,110 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:02,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 20:00:02,110 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:02,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:02,111 INFO L82 PathProgramCache]: Analyzing trace with hash -86040231, now seen corresponding path program 2 times [2021-02-19 20:00:02,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:02,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826494571] [2021-02-19 20:00:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:02,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826494571] [2021-02-19 20:00:02,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:00:02,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:00:02,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711228352] [2021-02-19 20:00:02,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:00:02,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:02,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:00:02,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:00:02,200 INFO L87 Difference]: Start difference. First operand 539 states and 1702 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:02,325 INFO L93 Difference]: Finished difference Result 863 states and 2726 transitions. [2021-02-19 20:00:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:00:02,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 20:00:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:02,331 INFO L225 Difference]: With dead ends: 863 [2021-02-19 20:00:02,331 INFO L226 Difference]: Without dead ends: 671 [2021-02-19 20:00:02,332 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:00:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-02-19 20:00:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2021-02-19 20:00:02,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.2208955223880595) internal successors, (2158), 670 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2158 transitions. [2021-02-19 20:00:02,370 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2158 transitions. Word has length 24 [2021-02-19 20:00:02,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:02,370 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 2158 transitions. [2021-02-19 20:00:02,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:02,370 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2158 transitions. [2021-02-19 20:00:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:00:02,373 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:02,373 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:02,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 20:00:02,374 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash 47996315, now seen corresponding path program 1 times [2021-02-19 20:00:02,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:02,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256434525] [2021-02-19 20:00:02,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:02,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256434525] [2021-02-19 20:00:02,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:00:02,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 20:00:02,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179651108] [2021-02-19 20:00:02,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 20:00:02,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:02,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 20:00:02,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:00:02,416 INFO L87 Difference]: Start difference. First operand 671 states and 2158 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:02,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:02,429 INFO L93 Difference]: Finished difference Result 752 states and 2398 transitions. [2021-02-19 20:00:02,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 20:00:02,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-02-19 20:00:02,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:02,435 INFO L225 Difference]: With dead ends: 752 [2021-02-19 20:00:02,435 INFO L226 Difference]: Without dead ends: 752 [2021-02-19 20:00:02,435 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:00:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-02-19 20:00:02,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2021-02-19 20:00:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.193075898801598) internal successors, (2398), 751 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2398 transitions. [2021-02-19 20:00:02,466 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2398 transitions. Word has length 27 [2021-02-19 20:00:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:02,467 INFO L480 AbstractCegarLoop]: Abstraction has 752 states and 2398 transitions. [2021-02-19 20:00:02,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2398 transitions. [2021-02-19 20:00:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:00:02,470 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:02,470 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:02,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 20:00:02,470 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1586834808, now seen corresponding path program 1 times [2021-02-19 20:00:02,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:02,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766031625] [2021-02-19 20:00:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:00:02,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766031625] [2021-02-19 20:00:02,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:00:02,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 20:00:02,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121598265] [2021-02-19 20:00:02,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 20:00:02,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 20:00:02,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:00:02,500 INFO L87 Difference]: Start difference. First operand 752 states and 2398 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:02,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:02,515 INFO L93 Difference]: Finished difference Result 800 states and 2514 transitions. [2021-02-19 20:00:02,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 20:00:02,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:00:02,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:02,521 INFO L225 Difference]: With dead ends: 800 [2021-02-19 20:00:02,521 INFO L226 Difference]: Without dead ends: 774 [2021-02-19 20:00:02,521 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:00:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-02-19 20:00:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 774. [2021-02-19 20:00:02,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.1720569210866754) internal successors, (2452), 773 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2452 transitions. [2021-02-19 20:00:02,569 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2452 transitions. Word has length 31 [2021-02-19 20:00:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:02,569 INFO L480 AbstractCegarLoop]: Abstraction has 774 states and 2452 transitions. [2021-02-19 20:00:02,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2452 transitions. [2021-02-19 20:00:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:00:02,572 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:02,572 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:02,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 20:00:02,572 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:02,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2050942947, now seen corresponding path program 1 times [2021-02-19 20:00:02,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:02,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877289158] [2021-02-19 20:00:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:02,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877289158] [2021-02-19 20:00:02,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72450059] [2021-02-19 20:00:02,800 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 [2021-02-19 20:00:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 20:00:02,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:03,115 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 [2021-02-19 20:00:03,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:03,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:03,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:03,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 20:00:03,212 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 [2021-02-19 20:00:03,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:03,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:03,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:03,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-02-19 20:00:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:03,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:03,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-02-19 20:00:03,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409157458] [2021-02-19 20:00:03,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:00:03,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:03,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:00:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:00:03,355 INFO L87 Difference]: Start difference. First operand 774 states and 2452 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:03,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:03,929 INFO L93 Difference]: Finished difference Result 1455 states and 4673 transitions. [2021-02-19 20:00:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 20:00:03,929 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:00:03,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:03,936 INFO L225 Difference]: With dead ends: 1455 [2021-02-19 20:00:03,936 INFO L226 Difference]: Without dead ends: 1119 [2021-02-19 20:00:03,937 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:00:03,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-02-19 20:00:03,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 906. [2021-02-19 20:00:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2132596685082873) internal successors, (2908), 905 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2908 transitions. [2021-02-19 20:00:03,971 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2908 transitions. Word has length 34 [2021-02-19 20:00:03,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:03,972 INFO L480 AbstractCegarLoop]: Abstraction has 906 states and 2908 transitions. [2021-02-19 20:00:03,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:03,972 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2908 transitions. [2021-02-19 20:00:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:00:03,976 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:03,976 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:04,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:00:04,190 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:04,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1386376495, now seen corresponding path program 2 times [2021-02-19 20:00:04,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:04,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525135880] [2021-02-19 20:00:04,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:04,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525135880] [2021-02-19 20:00:04,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265822914] [2021-02-19 20:00:04,262 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 [2021-02-19 20:00:04,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:00:04,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:00:04,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 20:00:04,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:00:04,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 20:00:04,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-02-19 20:00:04,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612575429] [2021-02-19 20:00:04,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:00:04,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:04,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:00:04,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:00:04,398 INFO L87 Difference]: Start difference. First operand 906 states and 2908 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:04,426 INFO L93 Difference]: Finished difference Result 2380 states and 7576 transitions. [2021-02-19 20:00:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:00:04,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:00:04,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:04,441 INFO L225 Difference]: With dead ends: 2380 [2021-02-19 20:00:04,441 INFO L226 Difference]: Without dead ends: 2330 [2021-02-19 20:00:04,441 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:00:04,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-02-19 20:00:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1654. [2021-02-19 20:00:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.327283726557774) internal successors, (5500), 1653 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:04,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5500 transitions. [2021-02-19 20:00:04,500 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5500 transitions. Word has length 37 [2021-02-19 20:00:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:04,501 INFO L480 AbstractCegarLoop]: Abstraction has 1654 states and 5500 transitions. [2021-02-19 20:00:04,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:04,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5500 transitions. [2021-02-19 20:00:04,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 20:00:04,505 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:04,506 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:04,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:00:04,728 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:04,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1069542546, now seen corresponding path program 3 times [2021-02-19 20:00:04,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:04,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215470865] [2021-02-19 20:00:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 20:00:04,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215470865] [2021-02-19 20:00:04,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292475606] [2021-02-19 20:00:04,774 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 [2021-02-19 20:00:04,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:00:04,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:00:04,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 20:00:04,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 20:00:04,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 20:00:04,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-02-19 20:00:04,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214205830] [2021-02-19 20:00:04,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:00:04,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:04,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:00:04,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:00:04,892 INFO L87 Difference]: Start difference. First operand 1654 states and 5500 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:04,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:04,934 INFO L93 Difference]: Finished difference Result 4845 states and 15851 transitions. [2021-02-19 20:00:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:00:04,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 20:00:04,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:04,962 INFO L225 Difference]: With dead ends: 4845 [2021-02-19 20:00:04,963 INFO L226 Difference]: Without dead ends: 4554 [2021-02-19 20:00:04,963 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:00:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-02-19 20:00:05,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3828. [2021-02-19 20:00:05,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.367650901489417) internal successors, (12888), 3827 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 12888 transitions. [2021-02-19 20:00:05,119 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 12888 transitions. Word has length 41 [2021-02-19 20:00:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:05,120 INFO L480 AbstractCegarLoop]: Abstraction has 3828 states and 12888 transitions. [2021-02-19 20:00:05,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:05,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 12888 transitions. [2021-02-19 20:00:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:00:05,130 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:05,130 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:05,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:00:05,346 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash -288017299, now seen corresponding path program 4 times [2021-02-19 20:00:05,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:05,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286014520] [2021-02-19 20:00:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 20:00:05,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286014520] [2021-02-19 20:00:05,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544817238] [2021-02-19 20:00:05,902 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 [2021-02-19 20:00:05,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:00:05,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:00:05,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:00:05,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:06,542 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:06,542 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 31 treesize of output 19 [2021-02-19 20:00:06,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:06,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:06,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:06,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-02-19 20:00:06,667 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:06,669 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 25 treesize of output 13 [2021-02-19 20:00:06,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:06,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:06,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:06,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:00:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:06,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:06,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-02-19 20:00:06,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187335573] [2021-02-19 20:00:06,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:00:06,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:06,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:00:06,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:00:06,796 INFO L87 Difference]: Start difference. First operand 3828 states and 12888 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:15,678 INFO L93 Difference]: Finished difference Result 26830 states and 89990 transitions. [2021-02-19 20:00:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-02-19 20:00:15,681 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 20:00:15,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:15,783 INFO L225 Difference]: With dead ends: 26830 [2021-02-19 20:00:15,783 INFO L226 Difference]: Without dead ends: 23098 [2021-02-19 20:00:15,792 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17127 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=5021, Invalid=37209, Unknown=0, NotChecked=0, Total=42230 [2021-02-19 20:00:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23098 states. [2021-02-19 20:00:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23098 to 4547. [2021-02-19 20:00:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 3.3515178178618568) internal successors, (15236), 4546 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 15236 transitions. [2021-02-19 20:00:16,126 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 15236 transitions. Word has length 44 [2021-02-19 20:00:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:16,129 INFO L480 AbstractCegarLoop]: Abstraction has 4547 states and 15236 transitions. [2021-02-19 20:00:16,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 15236 transitions. [2021-02-19 20:00:16,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:00:16,141 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:16,142 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:16,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:00:16,365 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:16,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1767430751, now seen corresponding path program 5 times [2021-02-19 20:00:16,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:16,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157978430] [2021-02-19 20:00:16,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:16,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157978430] [2021-02-19 20:00:16,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631826201] [2021-02-19 20:00:16,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:00:16,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:00:16,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:00:16,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 20:00:16,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:17,339 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:17,340 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 17 [2021-02-19 20:00:17,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:17,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:17,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:17,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-02-19 20:00:17,516 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:17,516 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 25 treesize of output 13 [2021-02-19 20:00:17,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:17,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:17,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:17,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:00:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:17,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:17,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:00:17,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205338063] [2021-02-19 20:00:17,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:00:17,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:00:17,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:00:17,609 INFO L87 Difference]: Start difference. First operand 4547 states and 15236 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:00:22,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:22,005 INFO L93 Difference]: Finished difference Result 28401 states and 94904 transitions. [2021-02-19 20:00:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-02-19 20:00:22,005 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:00:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:22,111 INFO L225 Difference]: With dead ends: 28401 [2021-02-19 20:00:22,111 INFO L226 Difference]: Without dead ends: 27869 [2021-02-19 20:00:22,114 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4710 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2046, Invalid=11760, Unknown=0, NotChecked=0, Total=13806 [2021-02-19 20:00:22,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27869 states. [2021-02-19 20:00:22,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27869 to 5370. [2021-02-19 20:00:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.3402868318122554) internal successors, (17934), 5369 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 17934 transitions. [2021-02-19 20:00:22,546 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 17934 transitions. Word has length 44 [2021-02-19 20:00:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:22,547 INFO L480 AbstractCegarLoop]: Abstraction has 5370 states and 17934 transitions. [2021-02-19 20:00:22,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:00:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 17934 transitions. [2021-02-19 20:00:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:00:22,563 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:22,563 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:22,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 20:00:22,778 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:22,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:22,778 INFO L82 PathProgramCache]: Analyzing trace with hash 2020212739, now seen corresponding path program 6 times [2021-02-19 20:00:22,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:22,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162892139] [2021-02-19 20:00:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:23,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162892139] [2021-02-19 20:00:23,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772986916] [2021-02-19 20:00:23,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:00:23,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:00:23,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:00:23,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 20:00:23,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:23,565 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:23,566 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 31 treesize of output 19 [2021-02-19 20:00:23,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:23,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:23,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:23,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-02-19 20:00:23,726 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:23,727 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 25 treesize of output 13 [2021-02-19 20:00:23,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:23,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:23,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:23,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:00:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:23,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:23,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:00:23,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153950088] [2021-02-19 20:00:23,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:00:23,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:23,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:00:23,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:00:23,838 INFO L87 Difference]: Start difference. First operand 5370 states and 17934 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:00:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:28,578 INFO L93 Difference]: Finished difference Result 37756 states and 126024 transitions. [2021-02-19 20:00:28,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-02-19 20:00:28,579 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:00:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:28,678 INFO L225 Difference]: With dead ends: 37756 [2021-02-19 20:00:28,678 INFO L226 Difference]: Without dead ends: 36886 [2021-02-19 20:00:28,682 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5904 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2522, Invalid=14248, Unknown=0, NotChecked=0, Total=16770 [2021-02-19 20:00:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36886 states. [2021-02-19 20:00:29,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36886 to 5460. [2021-02-19 20:00:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5460 states, 5459 states have (on average 3.3418208463088477) internal successors, (18243), 5459 states have internal predecessors, (18243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 18243 transitions. [2021-02-19 20:00:29,072 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 18243 transitions. Word has length 44 [2021-02-19 20:00:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:29,072 INFO L480 AbstractCegarLoop]: Abstraction has 5460 states and 18243 transitions. [2021-02-19 20:00:29,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:00:29,072 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 18243 transitions. [2021-02-19 20:00:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:00:29,092 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:29,092 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:29,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:00:29,306 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:29,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1102133729, now seen corresponding path program 7 times [2021-02-19 20:00:29,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:29,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968713079] [2021-02-19 20:00:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:29,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968713079] [2021-02-19 20:00:29,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786931836] [2021-02-19 20:00:29,862 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 [2021-02-19 20:00:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:00:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:30,257 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:30,258 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 17 [2021-02-19 20:00:30,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:30,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:30,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:30,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-02-19 20:00:30,431 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:30,431 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 25 treesize of output 13 [2021-02-19 20:00:30,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:30,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:30,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:30,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:00:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:30,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:30,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:00:30,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059182575] [2021-02-19 20:00:30,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:00:30,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:30,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:00:30,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:00:30,542 INFO L87 Difference]: Start difference. First operand 5460 states and 18243 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:00:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:36,640 INFO L93 Difference]: Finished difference Result 47050 states and 156994 transitions. [2021-02-19 20:00:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-02-19 20:00:36,640 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-02-19 20:00:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:36,751 INFO L225 Difference]: With dead ends: 47050 [2021-02-19 20:00:36,751 INFO L226 Difference]: Without dead ends: 45439 [2021-02-19 20:00:36,753 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7555 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2979, Invalid=17327, Unknown=0, NotChecked=0, Total=20306 [2021-02-19 20:00:36,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45439 states. [2021-02-19 20:00:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45439 to 6441. [2021-02-19 20:00:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6441 states, 6440 states have (on average 3.332919254658385) internal successors, (21464), 6440 states have internal predecessors, (21464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6441 states to 6441 states and 21464 transitions. [2021-02-19 20:00:37,307 INFO L78 Accepts]: Start accepts. Automaton has 6441 states and 21464 transitions. Word has length 44 [2021-02-19 20:00:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:37,307 INFO L480 AbstractCegarLoop]: Abstraction has 6441 states and 21464 transitions. [2021-02-19 20:00:37,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:00:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 6441 states and 21464 transitions. [2021-02-19 20:00:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:00:37,323 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:37,323 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:37,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:00:37,538 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:37,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:37,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1408671415, now seen corresponding path program 8 times [2021-02-19 20:00:37,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:37,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357280358] [2021-02-19 20:00:37,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:37,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357280358] [2021-02-19 20:00:37,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056844059] [2021-02-19 20:00:37,934 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 [2021-02-19 20:00:37,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:00:37,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:00:37,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:00:37,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:38,309 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:38,309 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 31 treesize of output 19 [2021-02-19 20:00:38,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:38,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:38,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:38,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-02-19 20:00:38,424 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:38,424 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 25 treesize of output 13 [2021-02-19 20:00:38,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:38,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:38,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:38,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:00:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:38,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:38,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:00:38,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585990933] [2021-02-19 20:00:38,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:00:38,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:38,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:00:38,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:00:38,523 INFO L87 Difference]: Start difference. First operand 6441 states and 21464 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:00:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:43,590 INFO L93 Difference]: Finished difference Result 40863 states and 136185 transitions. [2021-02-19 20:00:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-02-19 20:00:43,591 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:00:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:43,693 INFO L225 Difference]: With dead ends: 40863 [2021-02-19 20:00:43,693 INFO L226 Difference]: Without dead ends: 40043 [2021-02-19 20:00:43,695 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5762 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2398, Invalid=14114, Unknown=0, NotChecked=0, Total=16512 [2021-02-19 20:00:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40043 states. [2021-02-19 20:00:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40043 to 6540. [2021-02-19 20:00:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 6539 states have (on average 3.3339960238568587) internal successors, (21801), 6539 states have internal predecessors, (21801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 21801 transitions. [2021-02-19 20:00:44,059 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 21801 transitions. Word has length 44 [2021-02-19 20:00:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:44,060 INFO L480 AbstractCegarLoop]: Abstraction has 6540 states and 21801 transitions. [2021-02-19 20:00:44,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:00:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 21801 transitions. [2021-02-19 20:00:44,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:00:44,080 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:44,080 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:44,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 20:00:44,305 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:44,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash 490592405, now seen corresponding path program 9 times [2021-02-19 20:00:44,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:44,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317953111] [2021-02-19 20:00:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:44,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317953111] [2021-02-19 20:00:44,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129994949] [2021-02-19 20:00:44,803 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 [2021-02-19 20:00:44,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:00:44,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:00:44,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:00:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:45,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:00:45,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:00:45,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-02-19 20:00:45,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:45,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:45,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:45,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:27 [2021-02-19 20:00:45,628 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:45,628 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 25 treesize of output 13 [2021-02-19 20:00:45,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:45,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:45,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:45,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:00:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:45,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:45,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:00:45,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625204221] [2021-02-19 20:00:45,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:00:45,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:45,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:00:45,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:00:45,735 INFO L87 Difference]: Start difference. First operand 6540 states and 21801 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:00:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:00:53,775 INFO L93 Difference]: Finished difference Result 46068 states and 153012 transitions. [2021-02-19 20:00:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-02-19 20:00:53,776 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:00:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:00:53,891 INFO L225 Difference]: With dead ends: 46068 [2021-02-19 20:00:53,891 INFO L226 Difference]: Without dead ends: 45036 [2021-02-19 20:00:53,894 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=3637, Invalid=20233, Unknown=0, NotChecked=0, Total=23870 [2021-02-19 20:00:53,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45036 states. [2021-02-19 20:00:54,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45036 to 6507. [2021-02-19 20:00:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6507 states, 6506 states have (on average 3.334153089455887) internal successors, (21692), 6506 states have internal predecessors, (21692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:00:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6507 states to 6507 states and 21692 transitions. [2021-02-19 20:00:54,382 INFO L78 Accepts]: Start accepts. Automaton has 6507 states and 21692 transitions. Word has length 44 [2021-02-19 20:00:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:00:54,382 INFO L480 AbstractCegarLoop]: Abstraction has 6507 states and 21692 transitions. [2021-02-19 20:00:54,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:00:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 6507 states and 21692 transitions. [2021-02-19 20:00:54,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:00:54,399 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:00:54,400 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:00:54,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:00:54,618 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:00:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:00:54,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1157026213, now seen corresponding path program 10 times [2021-02-19 20:00:54,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:00:54,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730817500] [2021-02-19 20:00:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:00:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:00:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:55,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730817500] [2021-02-19 20:00:55,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383696062] [2021-02-19 20:00:55,122 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 [2021-02-19 20:00:55,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:00:55,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:00:55,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:00:55,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:00:55,595 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:55,595 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 31 treesize of output 19 [2021-02-19 20:00:55,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:55,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:55,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:55,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-02-19 20:00:55,695 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:00:55,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:00:55,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:00:55,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:00:55,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:00:55,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:00:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:00:55,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:00:55,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:00:55,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483289652] [2021-02-19 20:00:55,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:00:55,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:00:55,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:00:55,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:00:55,807 INFO L87 Difference]: Start difference. First operand 6507 states and 21692 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:01:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:01:03,638 INFO L93 Difference]: Finished difference Result 40459 states and 134704 transitions. [2021-02-19 20:01:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-02-19 20:01:03,639 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-02-19 20:01:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:01:03,738 INFO L225 Difference]: With dead ends: 40459 [2021-02-19 20:01:03,738 INFO L226 Difference]: Without dead ends: 39249 [2021-02-19 20:01:03,740 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3639, Invalid=22767, Unknown=0, NotChecked=0, Total=26406 [2021-02-19 20:01:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39249 states. [2021-02-19 20:01:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39249 to 6786. [2021-02-19 20:01:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6786 states, 6785 states have (on average 3.3326455416359617) internal successors, (22612), 6785 states have internal predecessors, (22612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:01:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6786 states to 6786 states and 22612 transitions. [2021-02-19 20:01:04,056 INFO L78 Accepts]: Start accepts. Automaton has 6786 states and 22612 transitions. Word has length 44 [2021-02-19 20:01:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:01:04,056 INFO L480 AbstractCegarLoop]: Abstraction has 6786 states and 22612 transitions. [2021-02-19 20:01:04,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:01:04,057 INFO L276 IsEmpty]: Start isEmpty. Operand 6786 states and 22612 transitions. [2021-02-19 20:01:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:01:04,072 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:01:04,073 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:01:04,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 20:01:04,273 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:01:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:01:04,274 INFO L82 PathProgramCache]: Analyzing trace with hash 584896357, now seen corresponding path program 11 times [2021-02-19 20:01:04,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:01:04,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451387989] [2021-02-19 20:01:04,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:01:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:01:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:04,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451387989] [2021-02-19 20:01:04,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830898666] [2021-02-19 20:01:04,639 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 [2021-02-19 20:01:04,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:01:04,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:01:04,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:01:04,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:01:05,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:01:05,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:01:05,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:01:05,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 20:01:05,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:05,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:05,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:05,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:22 [2021-02-19 20:01:05,235 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:05,235 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 25 treesize of output 13 [2021-02-19 20:01:05,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:05,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:05,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:05,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:01:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:05,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:01:05,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:01:05,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335591219] [2021-02-19 20:01:05,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:01:05,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:01:05,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:01:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:01:05,414 INFO L87 Difference]: Start difference. First operand 6786 states and 22612 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:01:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:01:10,166 INFO L93 Difference]: Finished difference Result 22180 states and 73880 transitions. [2021-02-19 20:01:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 20:01:10,167 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:01:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:01:10,215 INFO L225 Difference]: With dead ends: 22180 [2021-02-19 20:01:10,216 INFO L226 Difference]: Without dead ends: 21908 [2021-02-19 20:01:10,216 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1287, Invalid=6723, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 20:01:10,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21908 states. [2021-02-19 20:01:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21908 to 6570. [2021-02-19 20:01:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6569 states have (on average 3.3344496879281476) internal successors, (21904), 6569 states have internal predecessors, (21904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:01:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 21904 transitions. [2021-02-19 20:01:10,431 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 21904 transitions. Word has length 44 [2021-02-19 20:01:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:01:10,431 INFO L480 AbstractCegarLoop]: Abstraction has 6570 states and 21904 transitions. [2021-02-19 20:01:10,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:01:10,432 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 21904 transitions. [2021-02-19 20:01:10,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:01:10,444 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:01:10,444 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:01:10,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 20:01:10,645 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:01:10,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:01:10,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1534966139, now seen corresponding path program 12 times [2021-02-19 20:01:10,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:01:10,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937495186] [2021-02-19 20:01:10,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:01:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:01:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:11,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937495186] [2021-02-19 20:01:11,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203764144] [2021-02-19 20:01:11,019 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 [2021-02-19 20:01:11,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:01:11,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:01:11,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:01:11,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:01:11,496 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:01:11,496 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 33 treesize of output 17 [2021-02-19 20:01:11,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:11,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:11,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:11,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-02-19 20:01:11,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:01:11,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:01:11,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:01:11,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:11,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:11,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:11,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-02-19 20:01:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:11,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:01:11,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:01:11,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785292155] [2021-02-19 20:01:11,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:01:11,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:01:11,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:01:11,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:01:11,919 INFO L87 Difference]: Start difference. First operand 6570 states and 21904 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:01:15,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:01:15,797 INFO L93 Difference]: Finished difference Result 13093 states and 43669 transitions. [2021-02-19 20:01:15,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 20:01:15,797 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:01:15,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:01:15,818 INFO L225 Difference]: With dead ends: 13093 [2021-02-19 20:01:15,819 INFO L226 Difference]: Without dead ends: 12613 [2021-02-19 20:01:15,819 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1057, Invalid=6083, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 20:01:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12613 states. [2021-02-19 20:01:15,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12613 to 6722. [2021-02-19 20:01:15,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 3.3309031394137776) internal successors, (22387), 6721 states have internal predecessors, (22387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:01:15,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 22387 transitions. [2021-02-19 20:01:15,959 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 22387 transitions. Word has length 44 [2021-02-19 20:01:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:01:15,960 INFO L480 AbstractCegarLoop]: Abstraction has 6722 states and 22387 transitions. [2021-02-19 20:01:15,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:01:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 22387 transitions. [2021-02-19 20:01:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:01:15,973 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:01:15,973 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:01:16,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:01:16,174 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:01:16,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:01:16,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1027642333, now seen corresponding path program 13 times [2021-02-19 20:01:16,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:01:16,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030032186] [2021-02-19 20:01:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:01:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:01:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:16,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030032186] [2021-02-19 20:01:16,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373863943] [2021-02-19 20:01:16,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:01:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:01:16,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:01:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:01:16,992 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:16,992 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 17 [2021-02-19 20:01:16,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:17,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:17,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:17,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-02-19 20:01:17,225 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:17,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:01:17,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:17,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:17,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:17,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:01:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:17,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:01:17,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:01:17,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028547305] [2021-02-19 20:01:17,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:01:17,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:01:17,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:01:17,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:01:17,366 INFO L87 Difference]: Start difference. First operand 6722 states and 22387 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:01:20,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:01:20,006 INFO L93 Difference]: Finished difference Result 12931 states and 43239 transitions. [2021-02-19 20:01:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 20:01:20,007 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-02-19 20:01:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:01:20,037 INFO L225 Difference]: With dead ends: 12931 [2021-02-19 20:01:20,038 INFO L226 Difference]: Without dead ends: 12631 [2021-02-19 20:01:20,038 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=662, Invalid=3894, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 20:01:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-02-19 20:01:20,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 6793. [2021-02-19 20:01:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6793 states, 6792 states have (on average 3.3318610129564195) internal successors, (22630), 6792 states have internal predecessors, (22630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:01:20,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 22630 transitions. [2021-02-19 20:01:20,187 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 22630 transitions. Word has length 44 [2021-02-19 20:01:20,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:01:20,187 INFO L480 AbstractCegarLoop]: Abstraction has 6793 states and 22630 transitions. [2021-02-19 20:01:20,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:01:20,187 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 22630 transitions. [2021-02-19 20:01:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:01:20,198 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:01:20,198 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:01:20,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 20:01:20,399 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:01:20,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:01:20,399 INFO L82 PathProgramCache]: Analyzing trace with hash 109563323, now seen corresponding path program 14 times [2021-02-19 20:01:20,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:01:20,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155098048] [2021-02-19 20:01:20,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:01:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:01:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:20,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155098048] [2021-02-19 20:01:20,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661957596] [2021-02-19 20:01:20,799 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 [2021-02-19 20:01:20,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:01:20,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:01:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:01:20,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:01:21,193 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:21,193 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 17 [2021-02-19 20:01:21,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:21,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:21,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:21,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-02-19 20:01:21,418 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:21,418 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 25 treesize of output 13 [2021-02-19 20:01:21,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:21,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:21,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:21,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:01:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:21,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:01:21,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:01:21,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745803600] [2021-02-19 20:01:21,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:01:21,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:01:21,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:01:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:01:21,564 INFO L87 Difference]: Start difference. First operand 6793 states and 22630 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:01:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:01:28,060 INFO L93 Difference]: Finished difference Result 31575 states and 105236 transitions. [2021-02-19 20:01:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-02-19 20:01:28,062 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:01:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:01:28,141 INFO L225 Difference]: With dead ends: 31575 [2021-02-19 20:01:28,141 INFO L226 Difference]: Without dead ends: 31013 [2021-02-19 20:01:28,142 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3604 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1883, Invalid=9889, Unknown=0, NotChecked=0, Total=11772 [2021-02-19 20:01:28,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31013 states. [2021-02-19 20:01:28,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31013 to 6874. [2021-02-19 20:01:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.3262039866142876) internal successors, (22861), 6873 states have internal predecessors, (22861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:01:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 22861 transitions. [2021-02-19 20:01:28,417 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 22861 transitions. Word has length 44 [2021-02-19 20:01:28,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:01:28,417 INFO L480 AbstractCegarLoop]: Abstraction has 6874 states and 22861 transitions. [2021-02-19 20:01:28,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:01:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 22861 transitions. [2021-02-19 20:01:28,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:01:28,428 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:01:28,428 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:01:28,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:01:28,630 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:01:28,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:01:28,630 INFO L82 PathProgramCache]: Analyzing trace with hash 164455807, now seen corresponding path program 15 times [2021-02-19 20:01:28,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:01:28,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413928798] [2021-02-19 20:01:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:01:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:01:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:29,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413928798] [2021-02-19 20:01:29,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657452003] [2021-02-19 20:01:29,058 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 [2021-02-19 20:01:29,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:01:29,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:01:29,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 20:01:29,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:01:29,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:01:29,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:01:29,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 20:01:29,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:29,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:29,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:29,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:24 [2021-02-19 20:01:29,937 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:29,937 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 25 treesize of output 13 [2021-02-19 20:01:29,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:29,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:29,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:29,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:01:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:30,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:01:30,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:01:30,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999385471] [2021-02-19 20:01:30,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:01:30,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:01:30,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:01:30,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:01:30,068 INFO L87 Difference]: Start difference. First operand 6874 states and 22861 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:01:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:01:39,430 INFO L93 Difference]: Finished difference Result 35083 states and 116558 transitions. [2021-02-19 20:01:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-02-19 20:01:39,431 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:01:39,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:01:39,517 INFO L225 Difference]: With dead ends: 35083 [2021-02-19 20:01:39,518 INFO L226 Difference]: Without dead ends: 34089 [2021-02-19 20:01:39,519 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5891 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2817, Invalid=14739, Unknown=0, NotChecked=0, Total=17556 [2021-02-19 20:01:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34089 states. [2021-02-19 20:01:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34089 to 7792. [2021-02-19 20:01:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7792 states, 7791 states have (on average 3.3162623539982032) internal successors, (25837), 7791 states have internal predecessors, (25837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:01:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7792 states to 7792 states and 25837 transitions. [2021-02-19 20:01:39,832 INFO L78 Accepts]: Start accepts. Automaton has 7792 states and 25837 transitions. Word has length 44 [2021-02-19 20:01:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:01:39,832 INFO L480 AbstractCegarLoop]: Abstraction has 7792 states and 25837 transitions. [2021-02-19 20:01:39,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:01:39,833 INFO L276 IsEmpty]: Start isEmpty. Operand 7792 states and 25837 transitions. [2021-02-19 20:01:39,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:01:39,844 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:01:39,845 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:01:40,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-02-19 20:01:40,047 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:01:40,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:01:40,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1587964785, now seen corresponding path program 16 times [2021-02-19 20:01:40,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:01:40,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686082830] [2021-02-19 20:01:40,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:01:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:01:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:40,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686082830] [2021-02-19 20:01:40,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324445774] [2021-02-19 20:01:40,675 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 [2021-02-19 20:01:40,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:01:40,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:01:40,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:01:40,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:01:41,322 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:41,323 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 31 treesize of output 19 [2021-02-19 20:01:41,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:41,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:41,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:41,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-02-19 20:01:41,476 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:41,476 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 25 treesize of output 13 [2021-02-19 20:01:41,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:41,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:41,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:41,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:01:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:41,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:01:41,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:01:41,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365865139] [2021-02-19 20:01:41,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:01:41,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:01:41,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:01:41,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:01:41,604 INFO L87 Difference]: Start difference. First operand 7792 states and 25837 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:01:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:01:52,458 INFO L93 Difference]: Finished difference Result 41800 states and 139248 transitions. [2021-02-19 20:01:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-02-19 20:01:52,459 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-02-19 20:01:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:01:52,558 INFO L225 Difference]: With dead ends: 41800 [2021-02-19 20:01:52,558 INFO L226 Difference]: Without dead ends: 37404 [2021-02-19 20:01:52,560 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12795 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=4443, Invalid=28137, Unknown=0, NotChecked=0, Total=32580 [2021-02-19 20:01:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37404 states. [2021-02-19 20:01:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37404 to 8391. [2021-02-19 20:01:52,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8391 states, 8390 states have (on average 3.3079856972586414) internal successors, (27754), 8390 states have internal predecessors, (27754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:01:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 27754 transitions. [2021-02-19 20:01:52,935 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 27754 transitions. Word has length 44 [2021-02-19 20:01:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:01:52,935 INFO L480 AbstractCegarLoop]: Abstraction has 8391 states and 27754 transitions. [2021-02-19 20:01:52,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:01:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 27754 transitions. [2021-02-19 20:01:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:01:52,948 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:01:52,949 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:01:53,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:01:53,151 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:01:53,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:01:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash 482179835, now seen corresponding path program 17 times [2021-02-19 20:01:53,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:01:53,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884711533] [2021-02-19 20:01:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:01:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:01:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:53,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884711533] [2021-02-19 20:01:53,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273164078] [2021-02-19 20:01:53,672 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 [2021-02-19 20:01:53,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:01:53,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:01:53,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 20:01:53,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:01:54,275 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:54,275 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 17 [2021-02-19 20:01:54,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:54,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:54,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:54,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-02-19 20:01:54,582 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:01:54,583 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 25 treesize of output 13 [2021-02-19 20:01:54,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:01:54,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:01:54,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:01:54,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:01:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:01:54,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:01:54,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:01:54,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675776579] [2021-02-19 20:01:54,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:01:54,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:01:54,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:01:54,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:01:54,761 INFO L87 Difference]: Start difference. First operand 8391 states and 27754 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:02:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:02:02,298 INFO L93 Difference]: Finished difference Result 33537 states and 111619 transitions. [2021-02-19 20:02:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-02-19 20:02:02,300 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:02:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:02:02,390 INFO L225 Difference]: With dead ends: 33537 [2021-02-19 20:02:02,390 INFO L226 Difference]: Without dead ends: 33005 [2021-02-19 20:02:02,391 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5044 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2276, Invalid=12486, Unknown=0, NotChecked=0, Total=14762 [2021-02-19 20:02:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33005 states. [2021-02-19 20:02:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33005 to 8815. [2021-02-19 20:02:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8815 states, 8814 states have (on average 3.3045155434535967) internal successors, (29126), 8814 states have internal predecessors, (29126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:02:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8815 states to 8815 states and 29126 transitions. [2021-02-19 20:02:02,744 INFO L78 Accepts]: Start accepts. Automaton has 8815 states and 29126 transitions. Word has length 44 [2021-02-19 20:02:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:02:02,744 INFO L480 AbstractCegarLoop]: Abstraction has 8815 states and 29126 transitions. [2021-02-19 20:02:02,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:02:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 8815 states and 29126 transitions. [2021-02-19 20:02:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:02:02,758 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:02:02,759 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:02:02,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 20:02:02,961 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:02:02,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:02:02,962 INFO L82 PathProgramCache]: Analyzing trace with hash -25143971, now seen corresponding path program 18 times [2021-02-19 20:02:02,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:02:02,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836130728] [2021-02-19 20:02:02,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:02:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:02:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:03,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836130728] [2021-02-19 20:02:03,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745070678] [2021-02-19 20:02:03,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:02:03,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 20:02:03,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:02:03,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 20:02:03,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:02:04,074 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:04,075 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 31 treesize of output 19 [2021-02-19 20:02:04,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:04,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:04,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:04,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-02-19 20:02:04,339 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:04,339 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 25 treesize of output 13 [2021-02-19 20:02:04,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:04,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:04,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:04,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:02:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:04,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:02:04,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:02:04,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396655494] [2021-02-19 20:02:04,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:02:04,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:02:04,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:02:04,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:02:04,462 INFO L87 Difference]: Start difference. First operand 8815 states and 29126 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:02:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:02:13,260 INFO L93 Difference]: Finished difference Result 42883 states and 142841 transitions. [2021-02-19 20:02:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-02-19 20:02:13,262 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:02:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:02:13,415 INFO L225 Difference]: With dead ends: 42883 [2021-02-19 20:02:13,415 INFO L226 Difference]: Without dead ends: 41993 [2021-02-19 20:02:13,417 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6774 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2912, Invalid=15994, Unknown=0, NotChecked=0, Total=18906 [2021-02-19 20:02:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41993 states. [2021-02-19 20:02:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41993 to 8932. [2021-02-19 20:02:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8932 states, 8931 states have (on average 3.3055648863509126) internal successors, (29522), 8931 states have internal predecessors, (29522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:02:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8932 states to 8932 states and 29522 transitions. [2021-02-19 20:02:13,873 INFO L78 Accepts]: Start accepts. Automaton has 8932 states and 29522 transitions. Word has length 44 [2021-02-19 20:02:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:02:13,873 INFO L480 AbstractCegarLoop]: Abstraction has 8932 states and 29522 transitions. [2021-02-19 20:02:13,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:02:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 8932 states and 29522 transitions. [2021-02-19 20:02:13,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:02:13,893 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:02:13,893 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:02:14,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-02-19 20:02:14,098 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:02:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:02:14,098 INFO L82 PathProgramCache]: Analyzing trace with hash -943222981, now seen corresponding path program 19 times [2021-02-19 20:02:14,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:02:14,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791426073] [2021-02-19 20:02:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:02:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:02:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:14,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791426073] [2021-02-19 20:02:14,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554074913] [2021-02-19 20:02:14,787 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 [2021-02-19 20:02:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:02:14,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:02:14,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:02:15,283 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:15,284 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 17 [2021-02-19 20:02:15,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:15,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:15,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:15,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-02-19 20:02:15,621 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:15,621 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 25 treesize of output 13 [2021-02-19 20:02:15,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:15,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:15,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:15,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:02:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:15,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:02:15,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:02:15,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316757791] [2021-02-19 20:02:15,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:02:15,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:02:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:02:15,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:02:15,782 INFO L87 Difference]: Start difference. First operand 8932 states and 29522 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:02:27,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:02:27,350 INFO L93 Difference]: Finished difference Result 48973 states and 162757 transitions. [2021-02-19 20:02:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-02-19 20:02:27,350 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-02-19 20:02:27,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:02:27,589 INFO L225 Difference]: With dead ends: 48973 [2021-02-19 20:02:27,589 INFO L226 Difference]: Without dead ends: 47923 [2021-02-19 20:02:27,590 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8907 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3456, Invalid=20414, Unknown=0, NotChecked=0, Total=23870 [2021-02-19 20:02:27,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47923 states. [2021-02-19 20:02:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47923 to 9050. [2021-02-19 20:02:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9050 states, 9049 states have (on average 3.305448115813902) internal successors, (29911), 9049 states have internal predecessors, (29911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:02:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9050 states to 9050 states and 29911 transitions. [2021-02-19 20:02:28,000 INFO L78 Accepts]: Start accepts. Automaton has 9050 states and 29911 transitions. Word has length 44 [2021-02-19 20:02:28,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:02:28,000 INFO L480 AbstractCegarLoop]: Abstraction has 9050 states and 29911 transitions. [2021-02-19 20:02:28,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:02:28,000 INFO L276 IsEmpty]: Start isEmpty. Operand 9050 states and 29911 transitions. [2021-02-19 20:02:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:02:28,020 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:02:28,020 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:02:28,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:02:28,234 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:02:28,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:02:28,235 INFO L82 PathProgramCache]: Analyzing trace with hash -636685295, now seen corresponding path program 20 times [2021-02-19 20:02:28,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:02:28,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246725000] [2021-02-19 20:02:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:02:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:02:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:28,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246725000] [2021-02-19 20:02:28,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486408341] [2021-02-19 20:02:28,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:02:28,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:02:28,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:02:28,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:02:28,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:02:29,580 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:29,581 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 31 treesize of output 19 [2021-02-19 20:02:29,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:29,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:29,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:29,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-02-19 20:02:29,820 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:29,820 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 25 treesize of output 13 [2021-02-19 20:02:29,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:29,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:29,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:29,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:02:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:29,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:02:29,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:02:29,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968159438] [2021-02-19 20:02:29,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:02:29,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:02:29,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:02:29,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:02:29,928 INFO L87 Difference]: Start difference. First operand 9050 states and 29911 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:02:39,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:02:39,869 INFO L93 Difference]: Finished difference Result 45204 states and 150223 transitions. [2021-02-19 20:02:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-02-19 20:02:39,871 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:02:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:02:40,006 INFO L225 Difference]: With dead ends: 45204 [2021-02-19 20:02:40,006 INFO L226 Difference]: Without dead ends: 44384 [2021-02-19 20:02:40,008 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6509 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2750, Invalid=15610, Unknown=0, NotChecked=0, Total=18360 [2021-02-19 20:02:40,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44384 states. [2021-02-19 20:02:40,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44384 to 9149. [2021-02-19 20:02:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9149 states, 9148 states have (on average 3.3065150852645386) internal successors, (30248), 9148 states have internal predecessors, (30248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:02:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9149 states to 9149 states and 30248 transitions. [2021-02-19 20:02:40,457 INFO L78 Accepts]: Start accepts. Automaton has 9149 states and 30248 transitions. Word has length 44 [2021-02-19 20:02:40,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:02:40,457 INFO L480 AbstractCegarLoop]: Abstraction has 9149 states and 30248 transitions. [2021-02-19 20:02:40,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:02:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 9149 states and 30248 transitions. [2021-02-19 20:02:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:02:40,474 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:02:40,474 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:02:40,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 20:02:40,680 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:02:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:02:40,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1554764305, now seen corresponding path program 21 times [2021-02-19 20:02:40,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:02:40,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375394166] [2021-02-19 20:02:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:02:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:02:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:41,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375394166] [2021-02-19 20:02:41,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917165621] [2021-02-19 20:02:41,613 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 [2021-02-19 20:02:41,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:02:41,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:02:41,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:02:41,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:02:42,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:02:42,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:02:42,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:02:42,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-02-19 20:02:42,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:42,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:42,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:42,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:27 [2021-02-19 20:02:42,802 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:02:42,802 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 25 treesize of output 13 [2021-02-19 20:02:42,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:02:42,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:02:42,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:02:42,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:02:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:43,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:02:43,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:02:43,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890491040] [2021-02-19 20:02:43,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:02:43,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:02:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:02:43,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:02:43,046 INFO L87 Difference]: Start difference. First operand 9149 states and 30248 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:02:49,411 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-02-19 20:02:51,458 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-02-19 20:02:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:02:57,443 INFO L93 Difference]: Finished difference Result 50272 states and 166753 transitions. [2021-02-19 20:02:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-02-19 20:02:57,443 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:02:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:02:57,732 INFO L225 Difference]: With dead ends: 50272 [2021-02-19 20:02:57,732 INFO L226 Difference]: Without dead ends: 49245 [2021-02-19 20:02:57,733 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9040 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=3518, Invalid=20974, Unknown=0, NotChecked=0, Total=24492 [2021-02-19 20:02:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49245 states. [2021-02-19 20:02:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49245 to 9032. [2021-02-19 20:02:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9032 states, 9031 states have (on average 3.3043959694386005) internal successors, (29842), 9031 states have internal predecessors, (29842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:02:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9032 states to 9032 states and 29842 transitions. [2021-02-19 20:02:58,167 INFO L78 Accepts]: Start accepts. Automaton has 9032 states and 29842 transitions. Word has length 44 [2021-02-19 20:02:58,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:02:58,167 INFO L480 AbstractCegarLoop]: Abstraction has 9032 states and 29842 transitions. [2021-02-19 20:02:58,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:02:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 9032 states and 29842 transitions. [2021-02-19 20:02:58,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:02:58,183 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:02:58,183 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:02:58,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:02:58,384 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:02:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:02:58,385 INFO L82 PathProgramCache]: Analyzing trace with hash -888330497, now seen corresponding path program 22 times [2021-02-19 20:02:58,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:02:58,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603304582] [2021-02-19 20:02:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:02:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:02:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:02:59,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603304582] [2021-02-19 20:02:59,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087228578] [2021-02-19 20:02:59,278 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:02:59,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:02:59,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:02:59,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:02:59,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:03:00,277 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:03:00,277 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 31 treesize of output 19 [2021-02-19 20:03:00,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:00,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:00,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:00,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-02-19 20:03:00,488 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:03:00,488 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 25 treesize of output 13 [2021-02-19 20:03:00,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:00,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:00,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:00,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:03:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:03:00,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:03:00,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:03:00,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859655543] [2021-02-19 20:03:00,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:03:00,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:03:00,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:03:00,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:03:00,693 INFO L87 Difference]: Start difference. First operand 9032 states and 29842 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:03:04,968 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-02-19 20:03:08,766 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-02-19 20:03:10,644 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 20:03:15,684 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 20:03:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:03:17,927 INFO L93 Difference]: Finished difference Result 45046 states and 149636 transitions. [2021-02-19 20:03:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-02-19 20:03:17,928 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-02-19 20:03:17,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:03:18,062 INFO L225 Difference]: With dead ends: 45046 [2021-02-19 20:03:18,062 INFO L226 Difference]: Without dead ends: 43836 [2021-02-19 20:03:18,065 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10989 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3874, Invalid=24856, Unknown=0, NotChecked=0, Total=28730 [2021-02-19 20:03:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43836 states. [2021-02-19 20:03:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43836 to 8973. [2021-02-19 20:03:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8973 states, 8972 states have (on average 3.3012706197057513) internal successors, (29619), 8972 states have internal predecessors, (29619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:03:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8973 states to 8973 states and 29619 transitions. [2021-02-19 20:03:18,607 INFO L78 Accepts]: Start accepts. Automaton has 8973 states and 29619 transitions. Word has length 44 [2021-02-19 20:03:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:03:18,607 INFO L480 AbstractCegarLoop]: Abstraction has 8973 states and 29619 transitions. [2021-02-19 20:03:18,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:03:18,607 INFO L276 IsEmpty]: Start isEmpty. Operand 8973 states and 29619 transitions. [2021-02-19 20:03:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:03:18,623 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:03:18,623 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:03:18,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:03:18,824 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:03:18,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:03:18,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1460460353, now seen corresponding path program 23 times [2021-02-19 20:03:18,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:03:18,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213145289] [2021-02-19 20:03:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:03:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:03:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:03:19,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213145289] [2021-02-19 20:03:19,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539699655] [2021-02-19 20:03:19,579 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:03:19,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:03:19,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:03:19,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:03:19,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:03:20,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:03:20,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:03:20,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 20:03:20,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:20,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:20,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:20,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:22 [2021-02-19 20:03:20,953 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:03:20,953 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 25 treesize of output 13 [2021-02-19 20:03:20,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:20,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:20,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:20,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:03:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:03:21,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:03:21,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:03:21,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982601399] [2021-02-19 20:03:21,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:03:21,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:03:21,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:03:21,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:03:21,219 INFO L87 Difference]: Start difference. First operand 8973 states and 29619 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:03:22,824 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-02-19 20:03:23,263 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-02-19 20:03:27,198 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-02-19 20:03:28,220 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-02-19 20:03:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:03:31,281 INFO L93 Difference]: Finished difference Result 23013 states and 76366 transitions. [2021-02-19 20:03:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 20:03:31,283 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:03:31,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:03:31,350 INFO L225 Difference]: With dead ends: 23013 [2021-02-19 20:03:31,350 INFO L226 Difference]: Without dead ends: 22741 [2021-02-19 20:03:31,351 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1185, Invalid=6125, Unknown=0, NotChecked=0, Total=7310 [2021-02-19 20:03:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22741 states. [2021-02-19 20:03:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22741 to 8595. [2021-02-19 20:03:31,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8595 states, 8594 states have (on average 3.3031184547358623) internal successors, (28387), 8594 states have internal predecessors, (28387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:03:31,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8595 states to 8595 states and 28387 transitions. [2021-02-19 20:03:31,636 INFO L78 Accepts]: Start accepts. Automaton has 8595 states and 28387 transitions. Word has length 44 [2021-02-19 20:03:31,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:03:31,636 INFO L480 AbstractCegarLoop]: Abstraction has 8595 states and 28387 transitions. [2021-02-19 20:03:31,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:03:31,636 INFO L276 IsEmpty]: Start isEmpty. Operand 8595 states and 28387 transitions. [2021-02-19 20:03:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:03:31,651 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:03:31,651 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:03:31,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 20:03:31,852 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:03:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:03:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1889150095, now seen corresponding path program 24 times [2021-02-19 20:03:31,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:03:31,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129902050] [2021-02-19 20:03:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:03:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:03:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 20:03:32,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129902050] [2021-02-19 20:03:32,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886680866] [2021-02-19 20:03:32,688 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:03:32,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:03:32,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:03:32,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 20:03:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:03:34,051 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:03:34,052 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 31 treesize of output 19 [2021-02-19 20:03:34,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:34,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:34,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:34,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-02-19 20:03:34,331 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:03:34,331 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 13 [2021-02-19 20:03:34,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:34,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:34,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:34,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2021-02-19 20:03:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:03:34,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:03:34,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-02-19 20:03:34,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42104207] [2021-02-19 20:03:34,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:03:34,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:03:34,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:03:34,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:03:34,570 INFO L87 Difference]: Start difference. First operand 8595 states and 28387 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-02-19 20:03:36,850 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-02-19 20:03:37,455 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-02-19 20:03:38,403 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 20:03:38,967 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 20:03:39,157 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-02-19 20:03:40,299 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-02-19 20:03:40,615 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-02-19 20:03:40,828 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-02-19 20:03:41,327 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-02-19 20:03:41,536 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 20:03:42,507 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 20:03:42,674 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-02-19 20:03:42,837 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 20:03:43,110 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-02-19 20:03:44,079 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 20:03:45,453 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-02-19 20:03:48,619 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 20:03:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:03:54,562 INFO L93 Difference]: Finished difference Result 35903 states and 119478 transitions. [2021-02-19 20:03:54,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-02-19 20:03:54,562 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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 44 [2021-02-19 20:03:54,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:03:54,656 INFO L225 Difference]: With dead ends: 35903 [2021-02-19 20:03:54,656 INFO L226 Difference]: Without dead ends: 31668 [2021-02-19 20:03:54,658 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12211 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=3970, Invalid=27182, Unknown=0, NotChecked=0, Total=31152 [2021-02-19 20:03:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31668 states. [2021-02-19 20:03:54,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31668 to 9033. [2021-02-19 20:03:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9033 states, 9032 states have (on average 3.2980513728963685) internal successors, (29788), 9032 states have internal predecessors, (29788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:03:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9033 states to 9033 states and 29788 transitions. [2021-02-19 20:03:55,016 INFO L78 Accepts]: Start accepts. Automaton has 9033 states and 29788 transitions. Word has length 44 [2021-02-19 20:03:55,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:03:55,016 INFO L480 AbstractCegarLoop]: Abstraction has 9033 states and 29788 transitions. [2021-02-19 20:03:55,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-02-19 20:03:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 9033 states and 29788 transitions. [2021-02-19 20:03:55,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:03:55,033 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:03:55,033 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:03:55,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:03:55,235 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:03:55,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:03:55,235 INFO L82 PathProgramCache]: Analyzing trace with hash 926403749, now seen corresponding path program 25 times [2021-02-19 20:03:55,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:03:55,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459856697] [2021-02-19 20:03:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:03:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:03:55,606 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 20:03:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:03:56,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459856697] [2021-02-19 20:03:56,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616517788] [2021-02-19 20:03:56,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:03:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:03:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:03:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:03:57,562 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:03:57,563 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 17 [2021-02-19 20:03:57,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:57,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:57,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:57,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-02-19 20:03:58,056 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:03:58,057 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 25 treesize of output 13 [2021-02-19 20:03:58,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:03:58,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:03:58,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:03:58,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:03:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:03:58,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:03:58,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:03:58,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639066546] [2021-02-19 20:03:58,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:03:58,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:03:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:03:58,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:03:58,329 INFO L87 Difference]: Start difference. First operand 9033 states and 29788 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:03:59,234 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 20:04:00,268 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 20:04:03,959 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 20:04:04,156 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-02-19 20:04:04,783 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-02-19 20:04:05,310 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-02-19 20:04:06,932 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 20:04:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:04:13,683 INFO L93 Difference]: Finished difference Result 36007 states and 119800 transitions. [2021-02-19 20:04:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-02-19 20:04:13,686 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-02-19 20:04:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:04:13,765 INFO L225 Difference]: With dead ends: 36007 [2021-02-19 20:04:13,765 INFO L226 Difference]: Without dead ends: 35475 [2021-02-19 20:04:13,766 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=2074, Invalid=11968, Unknown=0, NotChecked=0, Total=14042 [2021-02-19 20:04:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35475 states. [2021-02-19 20:04:14,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35475 to 9234. [2021-02-19 20:04:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9234 states, 9233 states have (on average 3.30336835264811) internal successors, (30500), 9233 states have internal predecessors, (30500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:04:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9234 states to 9234 states and 30500 transitions. [2021-02-19 20:04:14,073 INFO L78 Accepts]: Start accepts. Automaton has 9234 states and 30500 transitions. Word has length 44 [2021-02-19 20:04:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:04:14,073 INFO L480 AbstractCegarLoop]: Abstraction has 9234 states and 30500 transitions. [2021-02-19 20:04:14,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:04:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 9234 states and 30500 transitions. [2021-02-19 20:04:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:04:14,090 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:04:14,090 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:04:14,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-02-19 20:04:14,291 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:04:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:04:14,291 INFO L82 PathProgramCache]: Analyzing trace with hash 419079943, now seen corresponding path program 26 times [2021-02-19 20:04:14,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:04:14,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505910838] [2021-02-19 20:04:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:04:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:04:14,683 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 20:04:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:04:15,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505910838] [2021-02-19 20:04:15,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487311574] [2021-02-19 20:04:15,584 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:04:15,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:04:15,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:04:15,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:04:15,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:04:16,576 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:04:16,577 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 31 treesize of output 19 [2021-02-19 20:04:16,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:04:16,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:04:16,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:04:16,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-02-19 20:04:17,096 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:04:17,096 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 25 treesize of output 13 [2021-02-19 20:04:17,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:04:17,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:04:17,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:04:17,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:04:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:04:17,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:04:17,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:04:17,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672954751] [2021-02-19 20:04:17,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:04:17,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:04:17,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:04:17,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:04:17,381 INFO L87 Difference]: Start difference. First operand 9234 states and 30500 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:04:18,532 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-02-19 20:04:18,775 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 20:04:18,981 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-02-19 20:04:19,401 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-02-19 20:04:22,023 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-02-19 20:04:22,249 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-02-19 20:04:22,724 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-02-19 20:04:23,018 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 20:04:23,462 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-02-19 20:04:23,703 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 20:04:24,008 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 20:04:24,717 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 20:04:25,025 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 20:04:25,200 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-02-19 20:04:28,047 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 20:04:28,565 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 20:04:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:04:30,929 INFO L93 Difference]: Finished difference Result 34504 states and 114768 transitions. [2021-02-19 20:04:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-02-19 20:04:30,932 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:04:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:04:31,036 INFO L225 Difference]: With dead ends: 34504 [2021-02-19 20:04:31,036 INFO L226 Difference]: Without dead ends: 34104 [2021-02-19 20:04:31,038 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2087, Invalid=11253, Unknown=0, NotChecked=0, Total=13340 [2021-02-19 20:04:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34104 states. [2021-02-19 20:04:31,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34104 to 9294. [2021-02-19 20:04:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9294 states, 9293 states have (on average 3.3035618207252773) internal successors, (30700), 9293 states have internal predecessors, (30700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:04:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9294 states to 9294 states and 30700 transitions. [2021-02-19 20:04:31,442 INFO L78 Accepts]: Start accepts. Automaton has 9294 states and 30700 transitions. Word has length 44 [2021-02-19 20:04:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:04:31,442 INFO L480 AbstractCegarLoop]: Abstraction has 9294 states and 30700 transitions. [2021-02-19 20:04:31,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:04:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9294 states and 30700 transitions. [2021-02-19 20:04:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:04:31,459 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:04:31,459 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:04:31,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:04:31,662 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:04:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:04:31,663 INFO L82 PathProgramCache]: Analyzing trace with hash -498999067, now seen corresponding path program 27 times [2021-02-19 20:04:31,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:04:31,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961485489] [2021-02-19 20:04:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:04:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:04:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:04:32,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961485489] [2021-02-19 20:04:32,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657441410] [2021-02-19 20:04:32,468 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:04:32,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:04:32,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:04:32,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:04:32,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:04:33,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:04:33,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:04:33,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-02-19 20:04:33,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:04:33,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:04:33,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:04:33,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:20 [2021-02-19 20:04:34,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:04:34,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:04:34,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:04:34,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 20:04:34,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:04:34,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:04:34,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:04:34,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-02-19 20:04:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:04:34,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:04:34,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:04:34,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206609798] [2021-02-19 20:04:34,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:04:34,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:04:34,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:04:34,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:04:34,626 INFO L87 Difference]: Start difference. First operand 9294 states and 30700 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:04:37,087 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-02-19 20:04:37,783 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 20:04:38,664 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 20:04:39,845 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-02-19 20:04:40,051 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 20:04:43,141 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 20:04:43,522 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-02-19 20:04:43,880 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-02-19 20:04:44,443 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-02-19 20:04:44,740 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-02-19 20:04:45,213 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-02-19 20:04:45,770 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-02-19 20:04:46,558 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-02-19 20:04:47,457 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-02-19 20:04:47,753 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 20:04:48,836 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-19 20:04:49,227 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-02-19 20:04:49,493 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-02-19 20:04:50,057 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-02-19 20:04:50,300 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-02-19 20:04:50,548 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-02-19 20:04:51,596 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-02-19 20:04:52,956 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 20:04:53,448 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-02-19 20:04:54,081 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-02-19 20:04:55,025 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-02-19 20:04:55,956 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 20:04:56,578 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-02-19 20:04:57,104 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 20:04:57,472 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 20:04:57,854 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-02-19 20:04:58,097 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-02-19 20:04:58,758 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-02-19 20:04:59,673 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-02-19 20:05:01,044 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 20:05:01,233 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 20:05:01,601 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 20:05:01,985 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 20:05:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:05:02,008 INFO L93 Difference]: Finished difference Result 43768 states and 145939 transitions. [2021-02-19 20:05:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-02-19 20:05:02,012 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-02-19 20:05:02,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:05:02,160 INFO L225 Difference]: With dead ends: 43768 [2021-02-19 20:05:02,160 INFO L226 Difference]: Without dead ends: 42898 [2021-02-19 20:05:02,162 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9318 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=3949, Invalid=22783, Unknown=0, NotChecked=0, Total=26732 [2021-02-19 20:05:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42898 states. [2021-02-19 20:05:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42898 to 9279. [2021-02-19 20:05:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9279 states, 9278 states have (on average 3.303729251993964) internal successors, (30652), 9278 states have internal predecessors, (30652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:05:02,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 30652 transitions. [2021-02-19 20:05:02,634 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 30652 transitions. Word has length 44 [2021-02-19 20:05:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:05:02,634 INFO L480 AbstractCegarLoop]: Abstraction has 9279 states and 30652 transitions. [2021-02-19 20:05:02,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-02-19 20:05:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 30652 transitions. [2021-02-19 20:05:02,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:05:02,718 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:05:02,718 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:05:02,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-02-19 20:05:02,922 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:05:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:05:02,922 INFO L82 PathProgramCache]: Analyzing trace with hash -444106583, now seen corresponding path program 28 times [2021-02-19 20:05:02,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:05:02,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238431022] [2021-02-19 20:05:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:05:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:05:03,410 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 20:05:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:05:04,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238431022] [2021-02-19 20:05:04,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652820521] [2021-02-19 20:05:04,409 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:05:04,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:05:04,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:05:04,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 20:05:04,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:05:05,883 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:05:05,884 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 31 treesize of output 19 [2021-02-19 20:05:05,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:05:05,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:05:05,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:05:05,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-02-19 20:05:06,229 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:05:06,229 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 25 treesize of output 13 [2021-02-19 20:05:06,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:05:06,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:05:06,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:05:06,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:05:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:05:06,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:05:06,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-02-19 20:05:06,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854998686] [2021-02-19 20:05:06,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 20:05:06,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:05:06,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 20:05:06,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 20:05:06,602 INFO L87 Difference]: Start difference. First operand 9279 states and 30652 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:05:07,966 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 20:05:08,386 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-02-19 20:05:08,691 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-02-19 20:05:09,154 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-02-19 20:05:09,796 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-02-19 20:05:10,580 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-02-19 20:05:11,758 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-02-19 20:05:11,981 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 20:05:12,998 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-02-19 20:05:13,848 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 20:05:14,841 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 20:05:15,297 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-02-19 20:05:15,664 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-02-19 20:05:16,212 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-02-19 20:05:16,498 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-02-19 20:05:16,978 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-02-19 20:05:18,042 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-02-19 20:05:18,335 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 20:05:19,166 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-02-19 20:05:19,544 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 20:05:19,765 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 20:05:22,176 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 20:05:23,524 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 20:05:23,766 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 20:05:24,035 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 20:05:24,510 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 20:05:25,245 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 20:05:26,931 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-02-19 20:05:27,526 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 20:05:27,837 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 20:05:28,019 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 20:05:28,216 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 20:05:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:05:28,238 INFO L93 Difference]: Finished difference Result 34482 states and 114523 transitions. [2021-02-19 20:05:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-02-19 20:05:28,242 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-02-19 20:05:28,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:05:28,344 INFO L225 Difference]: With dead ends: 34482 [2021-02-19 20:05:28,344 INFO L226 Difference]: Without dead ends: 33763 [2021-02-19 20:05:28,345 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6854 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=2753, Invalid=17269, Unknown=0, NotChecked=0, Total=20022 [2021-02-19 20:05:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33763 states. [2021-02-19 20:05:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33763 to 9114. [2021-02-19 20:05:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9114 states, 9113 states have (on average 3.3016569735542634) internal successors, (30088), 9113 states have internal predecessors, (30088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:05:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9114 states to 9114 states and 30088 transitions. [2021-02-19 20:05:28,715 INFO L78 Accepts]: Start accepts. Automaton has 9114 states and 30088 transitions. Word has length 44 [2021-02-19 20:05:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:05:28,715 INFO L480 AbstractCegarLoop]: Abstraction has 9114 states and 30088 transitions. [2021-02-19 20:05:28,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-02-19 20:05:28,715 INFO L276 IsEmpty]: Start isEmpty. Operand 9114 states and 30088 transitions. [2021-02-19 20:05:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:05:28,730 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:05:28,730 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:05:28,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:05:28,931 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:05:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:05:28,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2127468501, now seen corresponding path program 29 times [2021-02-19 20:05:28,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:05:28,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116600843] [2021-02-19 20:05:28,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:05:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:05:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 20:05:30,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116600843] [2021-02-19 20:05:30,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235917391] [2021-02-19 20:05:30,354 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:05:30,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:05:30,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:05:30,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 20:05:30,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:05:32,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:05:32,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:05:32,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-02-19 20:05:32,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:05:32,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:05:32,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:05:32,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:24 [2021-02-19 20:05:32,503 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:05:32,504 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 25 treesize of output 13 [2021-02-19 20:05:32,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:05:32,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:05:32,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:05:32,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:05:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:05:32,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:05:32,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-02-19 20:05:32,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746475771] [2021-02-19 20:05:32,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:05:32,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:05:32,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:05:32,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:05:32,905 INFO L87 Difference]: Start difference. First operand 9114 states and 30088 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-02-19 20:05:34,283 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-02-19 20:05:35,076 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-02-19 20:05:35,486 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-02-19 20:05:36,021 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-02-19 20:05:36,639 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-02-19 20:05:36,918 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-02-19 20:05:37,105 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-02-19 20:05:37,706 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 20:05:38,003 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-02-19 20:05:39,529 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-02-19 20:05:40,212 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-02-19 20:05:40,507 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-02-19 20:05:40,764 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 20:05:40,980 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-02-19 20:05:41,243 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-02-19 20:05:41,744 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-02-19 20:05:41,997 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-02-19 20:05:42,421 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 20:05:42,660 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:05:42,913 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-02-19 20:05:43,132 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 20:05:44,367 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-02-19 20:05:45,409 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 20:05:45,996 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-02-19 20:05:47,009 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 20:05:47,395 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-02-19 20:05:47,710 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-02-19 20:05:47,963 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 20:05:49,066 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 20:05:50,901 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 20:05:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:05:57,201 INFO L93 Difference]: Finished difference Result 32575 states and 108630 transitions. [2021-02-19 20:05:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-02-19 20:05:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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 44 [2021-02-19 20:05:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:05:57,291 INFO L225 Difference]: With dead ends: 32575 [2021-02-19 20:05:57,291 INFO L226 Difference]: Without dead ends: 28750 [2021-02-19 20:05:57,294 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10023 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=3473, Invalid=22609, Unknown=0, NotChecked=0, Total=26082 [2021-02-19 20:05:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28750 states. [2021-02-19 20:05:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28750 to 9454. [2021-02-19 20:05:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9454 states, 9453 states have (on average 3.2971543425367607) internal successors, (31168), 9453 states have internal predecessors, (31168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:05:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9454 states to 9454 states and 31168 transitions. [2021-02-19 20:05:57,792 INFO L78 Accepts]: Start accepts. Automaton has 9454 states and 31168 transitions. Word has length 44 [2021-02-19 20:05:57,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:05:57,792 INFO L480 AbstractCegarLoop]: Abstraction has 9454 states and 31168 transitions. [2021-02-19 20:05:57,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-02-19 20:05:57,793 INFO L276 IsEmpty]: Start isEmpty. Operand 9454 states and 31168 transitions. [2021-02-19 20:05:57,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:05:57,814 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:05:57,814 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:05:58,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-02-19 20:05:58,017 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:05:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:05:58,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1490076491, now seen corresponding path program 30 times [2021-02-19 20:05:58,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:05:58,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236014901] [2021-02-19 20:05:58,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:05:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:05:58,491 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 20:05:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 20:05:59,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236014901] [2021-02-19 20:05:59,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034330657] [2021-02-19 20:05:59,514 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:05:59,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:05:59,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:05:59,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 20:05:59,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:06:01,342 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:06:01,343 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 31 treesize of output 19 [2021-02-19 20:06:01,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:06:01,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:06:01,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:06:01,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-02-19 20:06:01,718 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:06:01,719 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 13 [2021-02-19 20:06:01,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:06:01,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:06:01,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:06:01,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2021-02-19 20:06:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:06:02,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:06:02,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-02-19 20:06:02,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916684961] [2021-02-19 20:06:02,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:06:02,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:06:02,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:06:02,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:06:02,155 INFO L87 Difference]: Start difference. First operand 9454 states and 31168 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-02-19 20:06:03,550 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-02-19 20:06:04,342 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-19 20:06:04,812 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-02-19 20:06:05,352 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 20:06:05,556 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-02-19 20:06:06,495 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-02-19 20:06:06,705 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-02-19 20:06:06,967 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-02-19 20:06:07,770 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 20:06:08,042 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-02-19 20:06:08,544 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 20:06:09,447 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 20:06:09,941 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-02-19 20:06:10,292 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 20:06:10,624 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-02-19 20:06:10,917 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:06:11,127 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-02-19 20:06:11,373 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-02-19 20:06:11,655 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 20:06:12,160 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-02-19 20:06:12,396 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-19 20:06:12,644 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 20:06:12,920 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 20:06:13,309 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 20:06:13,513 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-02-19 20:06:13,725 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 20:06:16,307 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-02-19 20:06:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:06:22,293 INFO L93 Difference]: Finished difference Result 36063 states and 120314 transitions. [2021-02-19 20:06:22,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-02-19 20:06:22,293 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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 44 [2021-02-19 20:06:22,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:06:22,373 INFO L225 Difference]: With dead ends: 36063 [2021-02-19 20:06:22,373 INFO L226 Difference]: Without dead ends: 33355 [2021-02-19 20:06:22,375 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10209 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=3565, Invalid=23167, Unknown=0, NotChecked=0, Total=26732 [2021-02-19 20:06:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33355 states. [2021-02-19 20:06:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33355 to 9524. [2021-02-19 20:06:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9524 states, 9523 states have (on average 3.2940249921243305) internal successors, (31369), 9523 states have internal predecessors, (31369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:06:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9524 states to 9524 states and 31369 transitions. [2021-02-19 20:06:22,683 INFO L78 Accepts]: Start accepts. Automaton has 9524 states and 31369 transitions. Word has length 44 [2021-02-19 20:06:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:06:22,684 INFO L480 AbstractCegarLoop]: Abstraction has 9524 states and 31369 transitions. [2021-02-19 20:06:22,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-02-19 20:06:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 9524 states and 31369 transitions. [2021-02-19 20:06:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 20:06:22,698 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:06:22,698 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:06:22,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:06:22,906 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:06:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:06:22,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1946588243, now seen corresponding path program 31 times [2021-02-19 20:06:22,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:06:22,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708421723] [2021-02-19 20:06:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:06:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:06:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:06:22,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708421723] [2021-02-19 20:06:22,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751748272] [2021-02-19 20:06:22,953 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:06:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:06:22,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 20:06:22,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:06:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:06:23,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:06:23,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 20:06:23,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920859537] [2021-02-19 20:06:23,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:06:23,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:06:23,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:06:23,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:06:23,149 INFO L87 Difference]: Start difference. First operand 9524 states and 31369 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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) [2021-02-19 20:06:23,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:06:23,222 INFO L93 Difference]: Finished difference Result 14453 states and 47686 transitions. [2021-02-19 20:06:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:06:23,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 47 [2021-02-19 20:06:23,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:06:23,254 INFO L225 Difference]: With dead ends: 14453 [2021-02-19 20:06:23,254 INFO L226 Difference]: Without dead ends: 14249 [2021-02-19 20:06:23,254 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:06:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14249 states. [2021-02-19 20:06:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14249 to 11040. [2021-02-19 20:06:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11040 states, 11039 states have (on average 3.322311803605399) internal successors, (36675), 11039 states have internal predecessors, (36675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:06:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11040 states to 11040 states and 36675 transitions. [2021-02-19 20:06:23,439 INFO L78 Accepts]: Start accepts. Automaton has 11040 states and 36675 transitions. Word has length 47 [2021-02-19 20:06:23,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:06:23,439 INFO L480 AbstractCegarLoop]: Abstraction has 11040 states and 36675 transitions. [2021-02-19 20:06:23,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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) [2021-02-19 20:06:23,440 INFO L276 IsEmpty]: Start isEmpty. Operand 11040 states and 36675 transitions. [2021-02-19 20:06:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 20:06:23,455 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:06:23,455 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:06:23,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:06:23,656 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:06:23,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:06:23,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1577757072, now seen corresponding path program 32 times [2021-02-19 20:06:23,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:06:23,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80972258] [2021-02-19 20:06:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:06:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:06:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:06:24,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80972258] [2021-02-19 20:06:24,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678719677] [2021-02-19 20:06:24,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:06:24,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:06:24,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:06:24,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 20:06:24,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:06:25,226 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:06:25,227 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 17 [2021-02-19 20:06:25,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:06:25,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:06:25,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:06:25,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-02-19 20:06:25,606 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:06:25,607 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 25 treesize of output 13 [2021-02-19 20:06:25,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:06:25,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:06:25,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:06:25,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:06:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:06:25,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:06:25,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-02-19 20:06:25,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233573151] [2021-02-19 20:06:25,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:06:25,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:06:25,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:06:25,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:06:25,828 INFO L87 Difference]: Start difference. First operand 11040 states and 36675 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:06:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:06:31,939 INFO L93 Difference]: Finished difference Result 26764 states and 89213 transitions. [2021-02-19 20:06:31,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 20:06:31,941 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 20:06:31,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:06:32,083 INFO L225 Difference]: With dead ends: 26764 [2021-02-19 20:06:32,083 INFO L226 Difference]: Without dead ends: 26464 [2021-02-19 20:06:32,083 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=858, Invalid=4994, Unknown=0, NotChecked=0, Total=5852 [2021-02-19 20:06:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26464 states. [2021-02-19 20:06:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26464 to 11201. [2021-02-19 20:06:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11201 states, 11200 states have (on average 3.3216071428571428) internal successors, (37202), 11200 states have internal predecessors, (37202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:06:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11201 states to 11201 states and 37202 transitions. [2021-02-19 20:06:32,336 INFO L78 Accepts]: Start accepts. Automaton has 11201 states and 37202 transitions. Word has length 47 [2021-02-19 20:06:32,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:06:32,336 INFO L480 AbstractCegarLoop]: Abstraction has 11201 states and 37202 transitions. [2021-02-19 20:06:32,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:06:32,337 INFO L276 IsEmpty]: Start isEmpty. Operand 11201 states and 37202 transitions. [2021-02-19 20:06:32,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 20:06:32,351 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:06:32,352 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:06:32,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-02-19 20:06:32,556 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:06:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:06:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1799131214, now seen corresponding path program 33 times [2021-02-19 20:06:32,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:06:32,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667165132] [2021-02-19 20:06:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:06:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:06:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:06:33,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667165132] [2021-02-19 20:06:33,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416302560] [2021-02-19 20:06:33,369 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:06:33,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:06:33,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:06:33,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:06:33,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:06:34,214 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:06:34,214 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 31 treesize of output 19 [2021-02-19 20:06:34,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:06:34,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:06:34,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:06:34,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-02-19 20:06:34,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:06:34,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:06:34,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:06:34,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 20:06:34,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:06:34,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:06:34,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:06:34,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:10 [2021-02-19 20:06:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:06:34,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:06:34,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-02-19 20:06:34,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316134210] [2021-02-19 20:06:34,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:06:34,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:06:34,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:06:34,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:06:34,851 INFO L87 Difference]: Start difference. First operand 11201 states and 37202 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:06:37,453 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-02-19 20:06:38,779 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 20:06:39,536 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-02-19 20:06:40,075 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-02-19 20:06:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:06:44,744 INFO L93 Difference]: Finished difference Result 32758 states and 109142 transitions. [2021-02-19 20:06:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 20:06:44,747 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 20:06:44,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:06:44,819 INFO L225 Difference]: With dead ends: 32758 [2021-02-19 20:06:44,819 INFO L226 Difference]: Without dead ends: 32242 [2021-02-19 20:06:44,820 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2884 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1383, Invalid=8319, Unknown=0, NotChecked=0, Total=9702 [2021-02-19 20:06:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32242 states. [2021-02-19 20:06:45,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32242 to 11055. [2021-02-19 20:06:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11055 states, 11054 states have (on average 3.3218744345938123) internal successors, (36720), 11054 states have internal predecessors, (36720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:06:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11055 states to 11055 states and 36720 transitions. [2021-02-19 20:06:45,180 INFO L78 Accepts]: Start accepts. Automaton has 11055 states and 36720 transitions. Word has length 47 [2021-02-19 20:06:45,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:06:45,180 INFO L480 AbstractCegarLoop]: Abstraction has 11055 states and 36720 transitions. [2021-02-19 20:06:45,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:06:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 11055 states and 36720 transitions. [2021-02-19 20:06:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 20:06:45,195 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:06:45,195 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:06:45,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:06:45,398 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:06:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:06:45,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2098476330, now seen corresponding path program 34 times [2021-02-19 20:06:45,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:06:45,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34109620] [2021-02-19 20:06:45,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:06:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:06:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:06:46,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34109620] [2021-02-19 20:06:46,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709656946] [2021-02-19 20:06:46,144 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:06:46,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:06:46,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:06:46,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 20:06:46,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:06:47,044 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:06:47,045 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 17 [2021-02-19 20:06:47,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:06:47,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:06:47,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:06:47,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-02-19 20:06:47,424 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:06:47,424 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 25 treesize of output 13 [2021-02-19 20:06:47,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:06:47,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:06:47,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:06:47,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:06:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:06:47,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:06:47,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-02-19 20:06:47,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884977445] [2021-02-19 20:06:47,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:06:47,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:06:47,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:06:47,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:06:47,636 INFO L87 Difference]: Start difference. First operand 11055 states and 36720 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:06:49,642 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-02-19 20:06:50,148 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 20:06:50,784 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-02-19 20:06:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:06:54,194 INFO L93 Difference]: Finished difference Result 26416 states and 88058 transitions. [2021-02-19 20:06:54,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 20:06:54,197 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 20:06:54,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:06:54,254 INFO L225 Difference]: With dead ends: 26416 [2021-02-19 20:06:54,254 INFO L226 Difference]: Without dead ends: 26116 [2021-02-19 20:06:54,254 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=863, Invalid=4989, Unknown=0, NotChecked=0, Total=5852 [2021-02-19 20:06:54,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26116 states. [2021-02-19 20:06:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26116 to 11066. [2021-02-19 20:06:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11066 states, 11065 states have (on average 3.322006326253954) internal successors, (36758), 11065 states have internal predecessors, (36758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:06:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11066 states to 11066 states and 36758 transitions. [2021-02-19 20:06:54,500 INFO L78 Accepts]: Start accepts. Automaton has 11066 states and 36758 transitions. Word has length 47 [2021-02-19 20:06:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:06:54,500 INFO L480 AbstractCegarLoop]: Abstraction has 11066 states and 36758 transitions. [2021-02-19 20:06:54,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:06:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 11066 states and 36758 transitions. [2021-02-19 20:06:54,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 20:06:54,516 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:06:54,516 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:06:54,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-02-19 20:06:54,717 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:06:54,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:06:54,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1278411956, now seen corresponding path program 35 times [2021-02-19 20:06:54,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:06:54,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550618271] [2021-02-19 20:06:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:06:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:06:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:06:55,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550618271] [2021-02-19 20:06:55,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889641552] [2021-02-19 20:06:55,589 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:06:55,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:06:55,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:06:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:06:55,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:06:56,522 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:06:56,523 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 17 [2021-02-19 20:06:56,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:06:56,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:06:56,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:06:56,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-02-19 20:06:56,933 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:06:56,933 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 25 treesize of output 13 [2021-02-19 20:06:56,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:06:56,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:06:56,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:06:56,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:06:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:06:57,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:06:57,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-02-19 20:06:57,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948927740] [2021-02-19 20:06:57,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:06:57,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:06:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:06:57,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:06:57,200 INFO L87 Difference]: Start difference. First operand 11066 states and 36758 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:06:59,454 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-02-19 20:07:00,667 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 20:07:01,453 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-02-19 20:07:02,007 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-02-19 20:07:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:05,709 INFO L93 Difference]: Finished difference Result 31800 states and 105638 transitions. [2021-02-19 20:07:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 20:07:05,712 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 20:07:05,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:05,790 INFO L225 Difference]: With dead ends: 31800 [2021-02-19 20:07:05,790 INFO L226 Difference]: Without dead ends: 31500 [2021-02-19 20:07:05,791 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1225, Invalid=7147, Unknown=0, NotChecked=0, Total=8372 [2021-02-19 20:07:05,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31500 states. [2021-02-19 20:07:06,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31500 to 10905. [2021-02-19 20:07:06,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10905 states, 10904 states have (on average 3.322725605282465) internal successors, (36231), 10904 states have internal predecessors, (36231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10905 states to 10905 states and 36231 transitions. [2021-02-19 20:07:06,161 INFO L78 Accepts]: Start accepts. Automaton has 10905 states and 36231 transitions. Word has length 47 [2021-02-19 20:07:06,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:06,161 INFO L480 AbstractCegarLoop]: Abstraction has 10905 states and 36231 transitions. [2021-02-19 20:07:06,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 10905 states and 36231 transitions. [2021-02-19 20:07:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 20:07:06,176 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:06,177 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:06,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 20:07:06,377 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:06,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:06,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1894038792, now seen corresponding path program 36 times [2021-02-19 20:07:06,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:06,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869331511] [2021-02-19 20:07:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 20:07:06,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869331511] [2021-02-19 20:07:06,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150824156] [2021-02-19 20:07:06,448 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:06,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:07:06,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:06,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 20:07:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 20:07:06,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:06,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 20:07:06,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634055425] [2021-02-19 20:07:06,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:07:06,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:06,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:07:06,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:07:06,704 INFO L87 Difference]: Start difference. First operand 10905 states and 36231 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:06,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:06,795 INFO L93 Difference]: Finished difference Result 18549 states and 61835 transitions. [2021-02-19 20:07:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:07:06,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-02-19 20:07:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:06,835 INFO L225 Difference]: With dead ends: 18549 [2021-02-19 20:07:06,835 INFO L226 Difference]: Without dead ends: 17935 [2021-02-19 20:07:06,837 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:07:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17935 states. [2021-02-19 20:07:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17935 to 12795. [2021-02-19 20:07:07,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12795 states, 12794 states have (on average 3.361419415350946) internal successors, (43006), 12794 states have internal predecessors, (43006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12795 states to 12795 states and 43006 transitions. [2021-02-19 20:07:07,078 INFO L78 Accepts]: Start accepts. Automaton has 12795 states and 43006 transitions. Word has length 51 [2021-02-19 20:07:07,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:07,079 INFO L480 AbstractCegarLoop]: Abstraction has 12795 states and 43006 transitions. [2021-02-19 20:07:07,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 12795 states and 43006 transitions. [2021-02-19 20:07:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 20:07:07,100 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:07,100 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:07,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 20:07:07,301 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:07,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:07,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1187962279, now seen corresponding path program 37 times [2021-02-19 20:07:07,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:07,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683509500] [2021-02-19 20:07:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:08,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683509500] [2021-02-19 20:07:08,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035996191] [2021-02-19 20:07:08,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:08,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:07:08,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:09,677 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:07:09,677 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 35 treesize of output 19 [2021-02-19 20:07:09,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:09,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:09,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:09,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:29 [2021-02-19 20:07:10,217 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:07:10,217 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 25 treesize of output 13 [2021-02-19 20:07:10,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:10,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:10,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:10,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-02-19 20:07:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:10,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:10,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-02-19 20:07:10,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096589970] [2021-02-19 20:07:10,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:07:10,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:10,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:07:10,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:07:10,576 INFO L87 Difference]: Start difference. First operand 12795 states and 43006 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:13,662 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 20:07:13,887 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-02-19 20:07:14,489 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-02-19 20:07:14,875 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-02-19 20:07:15,700 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-02-19 20:07:16,687 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-02-19 20:07:16,959 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-02-19 20:07:17,688 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 20:07:18,190 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-02-19 20:07:18,650 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-02-19 20:07:19,152 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-02-19 20:07:19,724 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 20:07:22,150 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 20:07:28,900 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 20:07:34,048 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-02-19 20:07:35,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:07:35,716 INFO L93 Difference]: Finished difference Result 82223 states and 280307 transitions. [2021-02-19 20:07:35,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-02-19 20:07:35,720 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-02-19 20:07:35,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:07:35,918 INFO L225 Difference]: With dead ends: 82223 [2021-02-19 20:07:35,919 INFO L226 Difference]: Without dead ends: 80329 [2021-02-19 20:07:35,921 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17614 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=5003, Invalid=39307, Unknown=0, NotChecked=0, Total=44310 [2021-02-19 20:07:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80329 states. [2021-02-19 20:07:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80329 to 13308. [2021-02-19 20:07:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13308 states, 13307 states have (on average 3.3764184263921244) internal successors, (44930), 13307 states have internal predecessors, (44930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13308 states to 13308 states and 44930 transitions. [2021-02-19 20:07:36,812 INFO L78 Accepts]: Start accepts. Automaton has 13308 states and 44930 transitions. Word has length 51 [2021-02-19 20:07:36,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:07:36,812 INFO L480 AbstractCegarLoop]: Abstraction has 13308 states and 44930 transitions. [2021-02-19 20:07:36,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 13308 states and 44930 transitions. [2021-02-19 20:07:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 20:07:36,832 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:07:36,832 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:07:37,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-02-19 20:07:37,033 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:07:37,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:07:37,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2050275805, now seen corresponding path program 38 times [2021-02-19 20:07:37,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:07:37,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160962679] [2021-02-19 20:07:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:07:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:07:37,879 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2021-02-19 20:07:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:38,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160962679] [2021-02-19 20:07:38,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939796356] [2021-02-19 20:07:38,446 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:07:38,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:07:38,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:07:38,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:07:38,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:07:39,714 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:07:39,715 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 31 treesize of output 19 [2021-02-19 20:07:39,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:39,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:39,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:39,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:29 [2021-02-19 20:07:40,569 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 20:07:40,569 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 13 [2021-02-19 20:07:40,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:07:40,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:07:40,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:07:40,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2021-02-19 20:07:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:07:40,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:07:40,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-02-19 20:07:40,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046971027] [2021-02-19 20:07:40,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 20:07:40,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:07:40,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 20:07:40,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 20:07:40,935 INFO L87 Difference]: Start difference. First operand 13308 states and 44930 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:07:42,626 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:07:43,003 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-02-19 20:07:43,567 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 20:07:44,102 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-02-19 20:07:44,627 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-02-19 20:07:44,924 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-02-19 20:07:45,873 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-02-19 20:07:46,185 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-02-19 20:07:46,512 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-02-19 20:07:46,945 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-02-19 20:07:47,409 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 20:07:47,736 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 20:07:48,234 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-02-19 20:07:49,368 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-02-19 20:07:49,610 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 20:07:50,219 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-02-19 20:07:50,411 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 20:07:51,017 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 20:07:51,738 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-02-19 20:07:52,364 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-02-19 20:07:54,185 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 20:07:57,630 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 20:07:59,728 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-02-19 20:07:59,995 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 20:08:01,423 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-02-19 20:08:01,775 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 20:08:02,430 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 20:08:03,135 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 20:08:10,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:08:10,358 INFO L93 Difference]: Finished difference Result 80868 states and 276913 transitions. [2021-02-19 20:08:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-02-19 20:08:10,371 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-02-19 20:08:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:08:10,623 INFO L225 Difference]: With dead ends: 80868 [2021-02-19 20:08:10,623 INFO L226 Difference]: Without dead ends: 78832 [2021-02-19 20:08:10,624 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15383 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=4605, Invalid=34797, Unknown=0, NotChecked=0, Total=39402 [2021-02-19 20:08:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78832 states. [2021-02-19 20:08:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78832 to 13719. [2021-02-19 20:08:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13719 states, 13718 states have (on average 3.3821985712202944) internal successors, (46397), 13718 states have internal predecessors, (46397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13719 states to 13719 states and 46397 transitions. [2021-02-19 20:08:11,548 INFO L78 Accepts]: Start accepts. Automaton has 13719 states and 46397 transitions. Word has length 51 [2021-02-19 20:08:11,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:08:11,548 INFO L480 AbstractCegarLoop]: Abstraction has 13719 states and 46397 transitions. [2021-02-19 20:08:11,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 13719 states and 46397 transitions. [2021-02-19 20:08:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-02-19 20:08:11,678 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:08:11,679 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:08:11,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-02-19 20:08:11,885 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:08:11,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:08:11,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1957881663, now seen corresponding path program 39 times [2021-02-19 20:08:11,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:08:11,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026042668] [2021-02-19 20:08:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:08:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:08:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-02-19 20:08:13,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026042668] [2021-02-19 20:08:13,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435495738] [2021-02-19 20:08:13,572 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:13,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:08:13,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:08:13,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 20:08:13,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:08:16,680 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 20:08:16,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-02-19 20:08:16,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:16,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:16,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:16,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-02-19 20:08:17,151 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 20:08:17,152 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 38 treesize of output 18 [2021-02-19 20:08:17,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:08:17,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:08:17,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:08:17,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-02-19 20:08:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:08:17,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:08:17,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 42 [2021-02-19 20:08:17,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490791176] [2021-02-19 20:08:17,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 20:08:17,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:08:17,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 20:08:17,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1541, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 20:08:17,662 INFO L87 Difference]: Start difference. First operand 13719 states and 46397 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:08:19,568 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-02-19 20:08:20,303 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-02-19 20:08:20,535 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-02-19 20:08:21,104 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2021-02-19 20:08:21,372 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 20:08:22,324 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 20:08:22,560 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 20:08:23,431 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-02-19 20:08:23,673 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 20:08:24,464 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 20:08:24,768 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 20:08:25,357 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-02-19 20:08:25,922 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 20:08:26,259 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 20:08:26,554 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-02-19 20:08:26,879 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-02-19 20:08:27,756 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-02-19 20:08:28,019 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 20:08:28,449 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-02-19 20:08:28,649 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-02-19 20:08:29,429 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-02-19 20:08:29,848 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-02-19 20:08:30,197 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-02-19 20:08:31,325 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-02-19 20:08:31,661 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 20:08:32,394 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 20:08:32,578 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-02-19 20:08:32,970 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 20:08:33,143 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-02-19 20:08:33,451 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 20:08:33,659 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-02-19 20:08:34,091 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-02-19 20:08:34,441 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-02-19 20:08:34,810 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-02-19 20:08:35,643 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-02-19 20:08:35,958 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-02-19 20:08:36,343 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-02-19 20:08:36,661 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-02-19 20:08:37,270 WARN L202 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-02-19 20:08:37,876 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-02-19 20:08:38,632 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-02-19 20:08:38,940 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-02-19 20:08:39,267 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-02-19 20:08:39,646 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-02-19 20:08:40,075 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 Received shutdown request... [2021-02-19 20:08:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-02-19 20:08:41,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:08:41,061 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 20:08:41,064 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 20:08:41,065 INFO L202 PluginConnector]: Adding new model producer-consumer-counter-3-5rN.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 08:08:41 BasicIcfg [2021-02-19 20:08:41,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 20:08:41,065 INFO L168 Benchmark]: Toolchain (without parser) took 520016.82 ms. Allocated memory was 255.9 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 236.6 MB in the beginning and 821.6 MB in the end (delta: -585.0 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-02-19 20:08:41,065 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 162.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:08:41,065 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.69 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:08:41,065 INFO L168 Benchmark]: Boogie Preprocessor took 18.67 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 981.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:08:41,065 INFO L168 Benchmark]: RCFGBuilder took 373.23 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 234.2 MB in the end (delta: -851.4 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-02-19 20:08:41,066 INFO L168 Benchmark]: TraceAbstraction took 519590.61 ms. Allocated memory was 255.9 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 233.6 MB in the beginning and 821.6 MB in the end (delta: -588.0 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-02-19 20:08:41,066 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 0.19 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 162.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.69 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.67 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 981.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 373.23 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 234.2 MB in the end (delta: -851.4 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 519590.61 ms. Allocated memory was 255.9 MB in the beginning and 1.9 GB in the end (delta: 1.6 GB). Free memory was 233.6 MB in the beginning and 821.6 MB in the end (delta: -588.0 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 88). Cancelled while BasicCegarLoop was constructing difference of abstraction (13719states) and FLOYD_HOARE automaton (currently 103 states, 42 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 141 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 519.4s, OverallIterations: 43, TraceHistogramMax: 3, AutomataDifference: 418.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3326 SDtfs, 40690 SDslu, 52927 SDs, 0 SdLazy, 105319 SolverSat, 11018 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5873 GetRequests, 1259 SyntacticMatches, 11 SemanticMatches, 4602 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243004 ImplicationChecksByTransitivity, 309.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13719occurred in iteration=42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 13.8s AutomataMinimizationTime, 42 MinimizatonAttempts, 932340 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 75.3s InterpolantComputationTime, 3590 NumberOfCodeBlocks, 3590 NumberOfCodeBlocksAsserted, 147 NumberOfCheckSat, 3508 ConstructedInterpolants, 53 QuantifiedInterpolants, 1836687 SizeOfPredicates, 373 NumberOfNonLiveVariables, 4752 ConjunctsInSsa, 1080 ConjunctsInUnsatCore, 82 InterpolantComputations, 6 PerfectInterpolantSequences, 421/1411 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