/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:21:51,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:21:51,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:21:51,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 16:21:51,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 16:21:51,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 16:21:51,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 16:21:51,927 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 [2021-05-03 16:21:51,963 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:21:51,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:21:51,964 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:21:51,964 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:21:51,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:21:51,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:21:51,967 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:21:51,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:21:51,967 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:21:51,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:21:51,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:21:51,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:21:51,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:21:51,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:21:51,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:21:51,968 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:21:51,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:21:51,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:21:51,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:21:51,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:21:51,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:21:51,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:21:51,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:21:51,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:21:51,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:21:51,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:21:51,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:21:51,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:21:51,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:21:51,970 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:21:51,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:21:51,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:21:52,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:21:52,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:21:52,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:21:52,284 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:21:52,286 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:21:52,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl [2021-05-03 16:21:52,287 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl' [2021-05-03 16:21:52,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:21:52,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:21:52,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:21:52,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:21:52,332 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:21:52,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:21:52" (1/1) ... [2021-05-03 16:21:52,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:21:52" (1/1) ... [2021-05-03 16:21:52,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:21:52,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:21:52,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:21:52,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:21:52,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:21:52" (1/1) ... [2021-05-03 16:21:52,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:21:52" (1/1) ... [2021-05-03 16:21:52,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:21:52" (1/1) ... [2021-05-03 16:21:52,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:21:52" (1/1) ... [2021-05-03 16:21:52,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:21:52" (1/1) ... [2021-05-03 16:21:52,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:21:52" (1/1) ... [2021-05-03 16:21:52,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:21:52" (1/1) ... [2021-05-03 16:21:52,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:21:52,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:21:52,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:21:52,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:21:52,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:21:52" (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 [2021-05-03 16:21:52,434 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:21:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:21:52,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:21:52,434 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:21:52,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:21:52,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:21:52,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:21:52,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:21:52,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:21:52,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 16:21:52,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 16:21:52,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 16:21:52,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-03 16:21:52,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-03 16:21:52,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-03 16:21:52,436 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 16:21:52,607 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:21:52,607 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 16:21:52,608 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:21:52 BoogieIcfgContainer [2021-05-03 16:21:52,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:21:52,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:21:52,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:21:52,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:21:52,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:21:52" (1/2) ... [2021-05-03 16:21:52,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32722ad4 and model type buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:21:52, skipping insertion in model container [2021-05-03 16:21:52,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:21:52" (2/2) ... [2021-05-03 16:21:52,617 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series-array.wvr.bpl [2021-05-03 16:21:52,622 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:21:52,622 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:21:52,625 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:21:52,626 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:21:52,696 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-03 16:21:52,708 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-03 16:21:52,722 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:21:52,722 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:21:52,722 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:21:52,722 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:21:52,722 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:21:52,722 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:21:52,722 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:21:52,722 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:21:52,729 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-05-03 16:21:52,774 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 16:21:52,792 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:52,792 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:21:52,793 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:52,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:52,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-05-03 16:21:52,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:52,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28799365] [2021-05-03 16:21:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:52,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28799365] [2021-05-03 16:21:52,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:21:52,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 16:21:52,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784904567] [2021-05-03 16:21:52,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:21:52,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:52,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:21:52,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:21:52,960 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:53,020 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-05-03 16:21:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:21:53,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 16:21:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:53,050 INFO L225 Difference]: With dead ends: 1236 [2021-05-03 16:21:53,051 INFO L226 Difference]: Without dead ends: 1109 [2021-05-03 16:21:53,053 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:21:53,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-05-03 16:21:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-05-03 16:21:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-05-03 16:21:53,160 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-05-03 16:21:53,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:53,161 INFO L480 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-05-03 16:21:53,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:53,162 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-05-03 16:21:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 16:21:53,167 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:53,168 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:21:53,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:21:53,168 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:53,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-05-03 16:21:53,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:53,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359995440] [2021-05-03 16:21:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:53,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359995440] [2021-05-03 16:21:53,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:21:53,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:21:53,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229306586] [2021-05-03 16:21:53,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:21:53,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:53,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:21:53,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:21:53,259 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:53,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:53,316 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-05-03 16:21:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:21:53,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 16:21:53,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:53,330 INFO L225 Difference]: With dead ends: 1524 [2021-05-03 16:21:53,330 INFO L226 Difference]: Without dead ends: 1418 [2021-05-03 16:21:53,331 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:21:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-05-03 16:21:53,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-05-03 16:21:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:53,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-05-03 16:21:53,369 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-05-03 16:21:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:53,369 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-05-03 16:21:53,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-05-03 16:21:53,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 16:21:53,373 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:53,373 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:21:53,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 16:21:53,374 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-05-03 16:21:53,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:53,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175441031] [2021-05-03 16:21:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:53,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175441031] [2021-05-03 16:21:53,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:21:53,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:21:53,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358668275] [2021-05-03 16:21:53,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:21:53,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:53,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:21:53,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:21:53,435 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:53,482 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-05-03 16:21:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:21:53,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 16:21:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:53,492 INFO L225 Difference]: With dead ends: 2017 [2021-05-03 16:21:53,492 INFO L226 Difference]: Without dead ends: 1875 [2021-05-03 16:21:53,493 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:21:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-05-03 16:21:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-05-03 16:21:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-05-03 16:21:53,549 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-05-03 16:21:53,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:53,554 INFO L480 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-05-03 16:21:53,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-05-03 16:21:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:21:53,560 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:53,560 INFO L551 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] [2021-05-03 16:21:53,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 16:21:53,560 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:53,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:53,561 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-05-03 16:21:53,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:53,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423161756] [2021-05-03 16:21:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:21:53,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423161756] [2021-05-03 16:21:53,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073310061] [2021-05-03 16:21:53,588 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 [2021-05-03 16:21:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:53,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:21:53,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:21:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:21:53,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:21:53,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-05-03 16:21:53,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331208750] [2021-05-03 16:21:53,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 16:21:53,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:53,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 16:21:53,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:21:53,773 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:53,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:53,894 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-05-03 16:21:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:21:53,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:21:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:53,905 INFO L225 Difference]: With dead ends: 2308 [2021-05-03 16:21:53,905 INFO L226 Difference]: Without dead ends: 2108 [2021-05-03 16:21:53,906 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:21:53,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-05-03 16:21:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-05-03 16:21:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-05-03 16:21:53,955 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-05-03 16:21:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:53,955 INFO L480 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-05-03 16:21:53,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-05-03 16:21:53,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:21:53,959 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:53,959 INFO L551 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] [2021-05-03 16:21:54,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:21:54,169 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:54,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:54,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1080968406, now seen corresponding path program 1 times [2021-05-03 16:21:54,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:54,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126566505] [2021-05-03 16:21:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:21:54,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126566505] [2021-05-03 16:21:54,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:21:54,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:21:54,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917118646] [2021-05-03 16:21:54,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:21:54,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:54,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:21:54,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:21:54,191 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) 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) [2021-05-03 16:21:54,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:54,258 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-05-03 16:21:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:21:54,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) 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 [2021-05-03 16:21:54,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:54,267 INFO L225 Difference]: With dead ends: 1950 [2021-05-03 16:21:54,267 INFO L226 Difference]: Without dead ends: 1860 [2021-05-03 16:21:54,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:21:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-05-03 16:21:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-05-03 16:21:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:54,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-05-03 16:21:54,311 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-05-03 16:21:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:54,312 INFO L480 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-05-03 16:21:54,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) 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) [2021-05-03 16:21:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-05-03 16:21:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:21:54,316 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:54,316 INFO L551 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] [2021-05-03 16:21:54,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 16:21:54,316 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:54,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1489193046, now seen corresponding path program 2 times [2021-05-03 16:21:54,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:54,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383326592] [2021-05-03 16:21:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:21:54,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383326592] [2021-05-03 16:21:54,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:21:54,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:21:54,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899735819] [2021-05-03 16:21:54,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:21:54,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:54,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:21:54,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:21:54,361 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) 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) [2021-05-03 16:21:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:54,421 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-05-03 16:21:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:21:54,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) 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 [2021-05-03 16:21:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:54,428 INFO L225 Difference]: With dead ends: 1308 [2021-05-03 16:21:54,428 INFO L226 Difference]: Without dead ends: 1308 [2021-05-03 16:21:54,428 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:21:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-05-03 16:21:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-05-03 16:21:54,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-05-03 16:21:54,455 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-05-03 16:21:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:54,457 INFO L480 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-05-03 16:21:54,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) 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) [2021-05-03 16:21:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-05-03 16:21:54,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:21:54,460 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:54,460 INFO L551 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] [2021-05-03 16:21:54,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 16:21:54,461 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:54,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:54,462 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-05-03 16:21:54,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:54,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535067295] [2021-05-03 16:21:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:21:54,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535067295] [2021-05-03 16:21:54,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:21:54,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:21:54,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523933259] [2021-05-03 16:21:54,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:21:54,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:54,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:21:54,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:21:54,518 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) 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) [2021-05-03 16:21:54,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:54,557 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-05-03 16:21:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:21:54,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) 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 [2021-05-03 16:21:54,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:54,562 INFO L225 Difference]: With dead ends: 1142 [2021-05-03 16:21:54,563 INFO L226 Difference]: Without dead ends: 1120 [2021-05-03 16:21:54,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:21:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-05-03 16:21:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-05-03 16:21:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-05-03 16:21:54,587 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-05-03 16:21:54,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:54,587 INFO L480 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-05-03 16:21:54,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) 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) [2021-05-03 16:21:54,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-05-03 16:21:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:21:54,590 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:54,590 INFO L551 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] [2021-05-03 16:21:54,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 16:21:54,591 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1861969590, now seen corresponding path program 1 times [2021-05-03 16:21:54,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:54,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210885942] [2021-05-03 16:21:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:21:54,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210885942] [2021-05-03 16:21:54,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549332303] [2021-05-03 16:21:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 16:21:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:54,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 16:21:54,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:21:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:21:54,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-03 16:21:54,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-05-03 16:21:54,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887378006] [2021-05-03 16:21:54,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:21:54,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:54,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:21:54,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:21:54,732 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-05-03 16:21:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:54,746 INFO L93 Difference]: Finished difference Result 1344 states and 4969 transitions. [2021-05-03 16:21:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:21:54,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-05-03 16:21:54,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:54,752 INFO L225 Difference]: With dead ends: 1344 [2021-05-03 16:21:54,752 INFO L226 Difference]: Without dead ends: 1344 [2021-05-03 16:21:54,752 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:21:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-05-03 16:21:54,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-05-03 16:21:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.6324324324324326) internal successors, (3360), 925 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-05-03 16:21:54,773 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-05-03 16:21:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:54,773 INFO L480 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-05-03 16:21:54,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-05-03 16:21:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-05-03 16:21:54,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 16:21:54,775 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:54,775 INFO L551 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] [2021-05-03 16:21:54,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:21:54,982 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:54,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:54,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1282023498, now seen corresponding path program 1 times [2021-05-03 16:21:54,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:54,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516113152] [2021-05-03 16:21:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:21:55,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516113152] [2021-05-03 16:21:55,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025161321] [2021-05-03 16:21:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 16:21:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:55,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 16:21:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:21:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:21:55,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-03 16:21:55,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-05-03 16:21:55,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035257294] [2021-05-03 16:21:55,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:21:55,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:55,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:21:55,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:21:55,079 INFO L87 Difference]: Start difference. First operand 926 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 6.75) 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) [2021-05-03 16:21:55,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:55,096 INFO L93 Difference]: Finished difference Result 1608 states and 5808 transitions. [2021-05-03 16:21:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:21:55,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) 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 [2021-05-03 16:21:55,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:55,104 INFO L225 Difference]: With dead ends: 1608 [2021-05-03 16:21:55,104 INFO L226 Difference]: Without dead ends: 1608 [2021-05-03 16:21:55,105 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:21:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-05-03 16:21:55,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-05-03 16:21:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.6614100185528757) internal successors, (3947), 1078 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-05-03 16:21:55,133 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-05-03 16:21:55,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:55,133 INFO L480 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-05-03 16:21:55,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) 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) [2021-05-03 16:21:55,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-05-03 16:21:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:21:55,136 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:55,136 INFO L551 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] [2021-05-03 16:21:55,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:21:55,345 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:55,346 INFO L82 PathProgramCache]: Analyzing trace with hash 720950344, now seen corresponding path program 1 times [2021-05-03 16:21:55,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:55,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573435659] [2021-05-03 16:21:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:55,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573435659] [2021-05-03 16:21:55,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067137900] [2021-05-03 16:21:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-05-03 16:21:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:55,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:21:55,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:21:55,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 16:21:55,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:21:55,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:21:55,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:21:55,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-05-03 16:21:55,672 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 15 treesize of output 11 [2021-05-03 16:21:55,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:21:55,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:21:55,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:21:55,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-05-03 16:21:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:55,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:21:55,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:21:55,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355174465] [2021-05-03 16:21:55,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:21:55,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:55,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:21:55,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:21:55,743 INFO L87 Difference]: Start difference. First operand 1079 states and 3947 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:55,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:55,905 INFO L93 Difference]: Finished difference Result 2449 states and 9125 transitions. [2021-05-03 16:21:55,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:21:55,906 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:21:55,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:55,920 INFO L225 Difference]: With dead ends: 2449 [2021-05-03 16:21:55,921 INFO L226 Difference]: Without dead ends: 2370 [2021-05-03 16:21:55,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:21:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-05-03 16:21:55,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1512. [2021-05-03 16:21:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.7068166776968896) internal successors, (5601), 1511 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5601 transitions. [2021-05-03 16:21:55,996 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5601 transitions. Word has length 29 [2021-05-03 16:21:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:55,996 INFO L480 AbstractCegarLoop]: Abstraction has 1512 states and 5601 transitions. [2021-05-03 16:21:55,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:55,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5601 transitions. [2021-05-03 16:21:56,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:21:56,000 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:56,001 INFO L551 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] [2021-05-03 16:21:56,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:21:56,218 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:56,219 INFO L82 PathProgramCache]: Analyzing trace with hash -53868170, now seen corresponding path program 2 times [2021-05-03 16:21:56,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:56,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178903523] [2021-05-03 16:21:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:56,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178903523] [2021-05-03 16:21:56,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058197810] [2021-05-03 16:21:56,339 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 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 [2021-05-03 16:21:56,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:21:56,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:21:56,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:21:56,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:21:56,425 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 17 treesize of output 13 [2021-05-03 16:21:56,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:21:56,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:21:56,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:21:56,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-05-03 16:21:56,451 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 15 treesize of output 11 [2021-05-03 16:21:56,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:21:56,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:21:56,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:21:56,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-05-03 16:21:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:56,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:21:56,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:21:56,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237551374] [2021-05-03 16:21:56,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:21:56,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:56,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:21:56,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:21:56,506 INFO L87 Difference]: Start difference. First operand 1512 states and 5601 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:56,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:56,671 INFO L93 Difference]: Finished difference Result 2849 states and 10712 transitions. [2021-05-03 16:21:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:21:56,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:21:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:56,681 INFO L225 Difference]: With dead ends: 2849 [2021-05-03 16:21:56,681 INFO L226 Difference]: Without dead ends: 2770 [2021-05-03 16:21:56,682 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:21:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-05-03 16:21:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1711. [2021-05-03 16:21:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.7239766081871344) internal successors, (6368), 1710 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 6368 transitions. [2021-05-03 16:21:56,733 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 6368 transitions. Word has length 29 [2021-05-03 16:21:56,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:56,734 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 6368 transitions. [2021-05-03 16:21:56,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:56,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 6368 transitions. [2021-05-03 16:21:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:21:56,738 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:56,738 INFO L551 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] [2021-05-03 16:21:56,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 16:21:56,955 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:56,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1931624520, now seen corresponding path program 3 times [2021-05-03 16:21:56,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:56,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049828395] [2021-05-03 16:21:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:57,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049828395] [2021-05-03 16:21:57,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122294804] [2021-05-03 16:21:57,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:21:57,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:21:57,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:21:57,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:21:57,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:21:57,134 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 17 treesize of output 13 [2021-05-03 16:21:57,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:21:57,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:21:57,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:21:57,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-05-03 16:21:57,164 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 15 treesize of output 11 [2021-05-03 16:21:57,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:21:57,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:21:57,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:21:57,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-05-03 16:21:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:57,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:21:57,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:21:57,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471397241] [2021-05-03 16:21:57,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:21:57,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:57,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:21:57,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:21:57,194 INFO L87 Difference]: Start difference. First operand 1711 states and 6368 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:57,358 INFO L93 Difference]: Finished difference Result 2677 states and 10034 transitions. [2021-05-03 16:21:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:21:57,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:21:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:57,367 INFO L225 Difference]: With dead ends: 2677 [2021-05-03 16:21:57,368 INFO L226 Difference]: Without dead ends: 2598 [2021-05-03 16:21:57,368 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:21:57,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-05-03 16:21:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1837. [2021-05-03 16:21:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.7265795206971677) internal successors, (6842), 1836 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-05-03 16:21:57,436 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-05-03 16:21:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:57,436 INFO L480 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-05-03 16:21:57,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-05-03 16:21:57,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:21:57,440 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:57,441 INFO L551 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] [2021-05-03 16:21:57,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:21:57,659 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:57,660 INFO L82 PathProgramCache]: Analyzing trace with hash 490207522, now seen corresponding path program 4 times [2021-05-03 16:21:57,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:57,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645305994] [2021-05-03 16:21:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:57,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645305994] [2021-05-03 16:21:57,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043794469] [2021-05-03 16:21:57,773 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 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 [2021-05-03 16:21:57,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:21:57,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:21:57,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:21:57,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:21:57,853 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 17 treesize of output 13 [2021-05-03 16:21:57,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:21:57,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:21:57,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:21:57,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-05-03 16:21:57,876 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 15 treesize of output 11 [2021-05-03 16:21:57,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:21:57,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:21:57,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:21:57,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-05-03 16:21:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:57,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:21:57,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:21:57,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451962253] [2021-05-03 16:21:57,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:21:57,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:57,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:21:57,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:21:57,916 INFO L87 Difference]: Start difference. First operand 1837 states and 6842 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:58,121 INFO L93 Difference]: Finished difference Result 3111 states and 11725 transitions. [2021-05-03 16:21:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:21:58,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:21:58,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:58,128 INFO L225 Difference]: With dead ends: 3111 [2021-05-03 16:21:58,128 INFO L226 Difference]: Without dead ends: 3032 [2021-05-03 16:21:58,129 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:21:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-05-03 16:21:58,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2051. [2021-05-03 16:21:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.7434146341463417) internal successors, (7674), 2050 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-05-03 16:21:58,173 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-05-03 16:21:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:58,173 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-05-03 16:21:58,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-05-03 16:21:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:21:58,178 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:58,178 INFO L551 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] [2021-05-03 16:21:58,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:21:58,395 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:58,395 INFO L82 PathProgramCache]: Analyzing trace with hash -464930448, now seen corresponding path program 5 times [2021-05-03 16:21:58,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:58,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784404168] [2021-05-03 16:21:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:58,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784404168] [2021-05-03 16:21:58,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096236909] [2021-05-03 16:21:58,511 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 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 [2021-05-03 16:21:58,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:21:58,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:21:58,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:21:58,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:21:58,618 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 17 treesize of output 13 [2021-05-03 16:21:58,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:21:58,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:21:58,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:21:58,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-05-03 16:21:58,662 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 15 treesize of output 11 [2021-05-03 16:21:58,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:21:58,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:21:58,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:21:58,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-05-03 16:21:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:58,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:21:58,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:21:58,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361270000] [2021-05-03 16:21:58,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:21:58,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:21:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:21:58,702 INFO L87 Difference]: Start difference. First operand 2051 states and 7674 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:58,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:58,923 INFO L93 Difference]: Finished difference Result 2933 states and 11023 transitions. [2021-05-03 16:21:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:21:58,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:21:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:58,932 INFO L225 Difference]: With dead ends: 2933 [2021-05-03 16:21:58,932 INFO L226 Difference]: Without dead ends: 2854 [2021-05-03 16:21:58,933 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:21:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-05-03 16:21:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1852. [2021-05-03 16:21:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.731496488384657) internal successors, (6907), 1851 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-05-03 16:21:58,989 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-05-03 16:21:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:58,990 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-05-03 16:21:58,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-05-03 16:21:58,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:21:58,994 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:58,994 INFO L551 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] [2021-05-03 16:21:59,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 16:21:59,213 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:59,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:59,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1689459718, now seen corresponding path program 6 times [2021-05-03 16:21:59,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:59,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050223456] [2021-05-03 16:21:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:59,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050223456] [2021-05-03 16:21:59,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943405053] [2021-05-03 16:21:59,303 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 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 [2021-05-03 16:21:59,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:21:59,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:21:59,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:21:59,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:21:59,388 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 15 treesize of output 11 [2021-05-03 16:21:59,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:21:59,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:21:59,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:21:59,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-05-03 16:21:59,411 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 15 treesize of output 11 [2021-05-03 16:21:59,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:21:59,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:21:59,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:21:59,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-05-03 16:21:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:21:59,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:21:59,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 16:21:59,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774364507] [2021-05-03 16:21:59,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:21:59,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:21:59,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:21:59,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:21:59,445 INFO L87 Difference]: Start difference. First operand 1852 states and 6907 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:21:59,608 INFO L93 Difference]: Finished difference Result 2807 states and 10501 transitions. [2021-05-03 16:21:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:21:59,608 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:21:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:21:59,617 INFO L225 Difference]: With dead ends: 2807 [2021-05-03 16:21:59,617 INFO L226 Difference]: Without dead ends: 2728 [2021-05-03 16:21:59,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:21:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-05-03 16:21:59,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1892. [2021-05-03 16:21:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.7223691168693813) internal successors, (7039), 1891 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-05-03 16:21:59,669 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-05-03 16:21:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:21:59,669 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-05-03 16:21:59,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:21:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-05-03 16:21:59,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 16:21:59,673 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:21:59,674 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:21:59,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 16:21:59,889 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:21:59,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:21:59,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1599438650, now seen corresponding path program 7 times [2021-05-03 16:21:59,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:21:59,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734356795] [2021-05-03 16:21:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:21:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:21:59,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734356795] [2021-05-03 16:21:59,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601361123] [2021-05-03 16:21:59,931 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 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 [2021-05-03 16:21:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:21:59,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:21:59,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:22:00,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:00,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-05-03 16:22:00,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487460267] [2021-05-03 16:22:00,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:22:00,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:00,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:22:00,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:22:00,020 INFO L87 Difference]: Start difference. First operand 1892 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:00,083 INFO L93 Difference]: Finished difference Result 3393 states and 12285 transitions. [2021-05-03 16:22:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:22:00,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 16:22:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:00,092 INFO L225 Difference]: With dead ends: 3393 [2021-05-03 16:22:00,092 INFO L226 Difference]: Without dead ends: 3242 [2021-05-03 16:22:00,093 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:22:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-05-03 16:22:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-05-03 16:22:00,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.752202643171806) internal successors, (10221), 2724 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-05-03 16:22:00,161 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-05-03 16:22:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:00,161 INFO L480 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-05-03 16:22:00,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:00,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-05-03 16:22:00,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 16:22:00,187 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:00,187 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:22:00,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 16:22:00,387 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:00,388 INFO L82 PathProgramCache]: Analyzing trace with hash 415909830, now seen corresponding path program 8 times [2021-05-03 16:22:00,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:00,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602978348] [2021-05-03 16:22:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:22:00,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602978348] [2021-05-03 16:22:00,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910285532] [2021-05-03 16:22:00,417 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 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 [2021-05-03 16:22:00,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:22:00,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:00,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:22:00,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:22:00,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:00,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-05-03 16:22:00,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943878569] [2021-05-03 16:22:00,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:22:00,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:00,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:22:00,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:22:00,492 INFO L87 Difference]: Start difference. First operand 2725 states and 10221 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:00,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:00,562 INFO L93 Difference]: Finished difference Result 5257 states and 19424 transitions. [2021-05-03 16:22:00,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:22:00,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 16:22:00,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:00,577 INFO L225 Difference]: With dead ends: 5257 [2021-05-03 16:22:00,578 INFO L226 Difference]: Without dead ends: 5006 [2021-05-03 16:22:00,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:22:00,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-05-03 16:22:00,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-05-03 16:22:00,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.8077099586966496) internal successors, (16594), 4358 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-05-03 16:22:00,684 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-05-03 16:22:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:00,684 INFO L480 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-05-03 16:22:00,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-05-03 16:22:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:22:00,694 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:00,694 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-05-03 16:22:00,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 16:22:00,912 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1135351718, now seen corresponding path program 9 times [2021-05-03 16:22:00,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:00,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024170504] [2021-05-03 16:22:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 16:22:00,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024170504] [2021-05-03 16:22:00,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267340448] [2021-05-03 16:22:00,944 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 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 [2021-05-03 16:22:00,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:22:00,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:00,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:22:00,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 16:22:01,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:01,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 16:22:01,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472974103] [2021-05-03 16:22:01,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:22:01,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:01,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:22:01,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:22:01,040 INFO L87 Difference]: Start difference. First operand 4359 states and 16594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:01,332 INFO L93 Difference]: Finished difference Result 16323 states and 59821 transitions. [2021-05-03 16:22:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:22:01,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:22:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:01,431 INFO L225 Difference]: With dead ends: 16323 [2021-05-03 16:22:01,431 INFO L226 Difference]: Without dead ends: 13965 [2021-05-03 16:22:01,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:22:01,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-05-03 16:22:01,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-05-03 16:22:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.893523131672598) internal successors, (27352), 7025 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-05-03 16:22:01,733 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-05-03 16:22:01,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:01,734 INFO L480 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-05-03 16:22:01,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:01,734 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-05-03 16:22:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:22:01,750 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:01,750 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-05-03 16:22:01,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 16:22:01,967 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:01,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:01,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1002610221, now seen corresponding path program 10 times [2021-05-03 16:22:01,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:01,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058916712] [2021-05-03 16:22:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 16:22:02,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058916712] [2021-05-03 16:22:02,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695379554] [2021-05-03 16:22:02,009 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 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 [2021-05-03 16:22:02,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:22:02,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:02,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:22:02,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 16:22:02,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:02,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 16:22:02,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335092632] [2021-05-03 16:22:02,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:22:02,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:02,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:22:02,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:22:02,123 INFO L87 Difference]: Start difference. First operand 7026 states and 27352 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:02,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:02,480 INFO L93 Difference]: Finished difference Result 18970 states and 71100 transitions. [2021-05-03 16:22:02,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:22:02,481 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:22:02,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:02,528 INFO L225 Difference]: With dead ends: 18970 [2021-05-03 16:22:02,528 INFO L226 Difference]: Without dead ends: 18531 [2021-05-03 16:22:02,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:22:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-05-03 16:22:02,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-05-03 16:22:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 3.994479790419162) internal successors, (42693), 10688 states have internal predecessors, (42693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:03,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-05-03 16:22:03,032 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-05-03 16:22:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:03,033 INFO L480 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-05-03 16:22:03,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-05-03 16:22:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:22:03,066 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:03,066 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-05-03 16:22:03,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:03,283 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:03,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:03,284 INFO L82 PathProgramCache]: Analyzing trace with hash 614978514, now seen corresponding path program 11 times [2021-05-03 16:22:03,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:03,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022087781] [2021-05-03 16:22:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:22:03,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022087781] [2021-05-03 16:22:03,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47928919] [2021-05-03 16:22:03,314 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 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 [2021-05-03 16:22:03,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:22:03,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:03,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:22:03,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:22:03,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:03,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-05-03 16:22:03,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527209581] [2021-05-03 16:22:03,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:22:03,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:03,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:22:03,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:22:03,469 INFO L87 Difference]: Start difference. First operand 10689 states and 42693 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:03,730 INFO L93 Difference]: Finished difference Result 18432 states and 70487 transitions. [2021-05-03 16:22:03,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:22:03,730 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:22:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:03,784 INFO L225 Difference]: With dead ends: 18432 [2021-05-03 16:22:03,785 INFO L226 Difference]: Without dead ends: 18354 [2021-05-03 16:22:03,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:22:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-05-03 16:22:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-05-03 16:22:04,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10639 states, 10638 states have (on average 3.9989659710471894) internal successors, (42541), 10638 states have internal predecessors, (42541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-05-03 16:22:04,211 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-05-03 16:22:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:04,211 INFO L480 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-05-03 16:22:04,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-05-03 16:22:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:22:04,235 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:04,235 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-05-03 16:22:04,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:04,449 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash 307309967, now seen corresponding path program 12 times [2021-05-03 16:22:04,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:04,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664460766] [2021-05-03 16:22:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:22:04,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664460766] [2021-05-03 16:22:04,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622073666] [2021-05-03 16:22:04,481 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 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 [2021-05-03 16:22:04,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:22:04,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:04,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:22:04,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:22:04,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:04,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-05-03 16:22:04,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076594206] [2021-05-03 16:22:04,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:22:04,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:04,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:22:04,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:22:04,574 INFO L87 Difference]: Start difference. First operand 10639 states and 42541 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:04,897 INFO L93 Difference]: Finished difference Result 20371 states and 77140 transitions. [2021-05-03 16:22:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:22:04,898 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:22:04,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:05,007 INFO L225 Difference]: With dead ends: 20371 [2021-05-03 16:22:05,007 INFO L226 Difference]: Without dead ends: 18706 [2021-05-03 16:22:05,007 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:22:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-05-03 16:22:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-05-03 16:22:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 4.00783722682743) internal successors, (53184), 13270 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-05-03 16:22:05,500 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-05-03 16:22:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:05,500 INFO L480 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-05-03 16:22:05,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-05-03 16:22:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:22:05,536 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:05,536 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-05-03 16:22:05,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 16:22:05,753 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:05,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:05,754 INFO L82 PathProgramCache]: Analyzing trace with hash -749871114, now seen corresponding path program 13 times [2021-05-03 16:22:05,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:05,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235979511] [2021-05-03 16:22:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 16:22:05,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235979511] [2021-05-03 16:22:05,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727534254] [2021-05-03 16:22:05,774 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 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 [2021-05-03 16:22:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:22:05,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:22:05,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:05,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-05-03 16:22:05,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66454575] [2021-05-03 16:22:05,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:22:05,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:05,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:22:05,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:22:05,982 INFO L87 Difference]: Start difference. First operand 13271 states and 53184 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:06,330 INFO L93 Difference]: Finished difference Result 29290 states and 113267 transitions. [2021-05-03 16:22:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:22:06,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:22:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:06,521 INFO L225 Difference]: With dead ends: 29290 [2021-05-03 16:22:06,521 INFO L226 Difference]: Without dead ends: 27668 [2021-05-03 16:22:06,521 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:22:06,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-05-03 16:22:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-05-03 16:22:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18232 states, 18231 states have (on average 4.042016345784653) internal successors, (73690), 18231 states have internal predecessors, (73690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-05-03 16:22:07,098 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-05-03 16:22:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:07,098 INFO L480 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-05-03 16:22:07,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-05-03 16:22:07,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:22:07,142 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:07,142 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-05-03 16:22:07,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:07,347 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:07,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:07,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1681290952, now seen corresponding path program 14 times [2021-05-03 16:22:07,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:07,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567736415] [2021-05-03 16:22:07,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 16:22:07,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567736415] [2021-05-03 16:22:07,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590179890] [2021-05-03 16:22:07,377 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 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 [2021-05-03 16:22:07,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:22:07,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:07,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:22:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:22:07,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:07,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-05-03 16:22:07,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250325969] [2021-05-03 16:22:07,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:22:07,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:07,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:22:07,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:22:07,504 INFO L87 Difference]: Start difference. First operand 18232 states and 73690 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:07,931 INFO L93 Difference]: Finished difference Result 27112 states and 106138 transitions. [2021-05-03 16:22:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:22:07,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:22:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:08,017 INFO L225 Difference]: With dead ends: 27112 [2021-05-03 16:22:08,018 INFO L226 Difference]: Without dead ends: 26976 [2021-05-03 16:22:08,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:22:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-05-03 16:22:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-05-03 16:22:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.0432300615197025) internal successors, (72952), 18043 states have internal predecessors, (72952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-05-03 16:22:08,695 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-05-03 16:22:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:08,695 INFO L480 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-05-03 16:22:08,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-05-03 16:22:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:22:08,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:08,744 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-05-03 16:22:08,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 16:22:08,947 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:08,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:08,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1329276436, now seen corresponding path program 15 times [2021-05-03 16:22:08,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:08,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487732489] [2021-05-03 16:22:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:22:08,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487732489] [2021-05-03 16:22:08,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813088425] [2021-05-03 16:22:08,983 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 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 [2021-05-03 16:22:09,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:22:09,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:09,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:22:09,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:22:09,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:09,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 16:22:09,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662678471] [2021-05-03 16:22:09,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:22:09,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:09,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:22:09,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:22:09,087 INFO L87 Difference]: Start difference. First operand 18044 states and 72952 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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) [2021-05-03 16:22:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:09,468 INFO L93 Difference]: Finished difference Result 30228 states and 119473 transitions. [2021-05-03 16:22:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:22:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 [2021-05-03 16:22:09,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:09,570 INFO L225 Difference]: With dead ends: 30228 [2021-05-03 16:22:09,570 INFO L226 Difference]: Without dead ends: 30070 [2021-05-03 16:22:09,570 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:22:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-05-03 16:22:10,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-05-03 16:22:10,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 4.074667690388214) internal successors, (84912), 20839 states have internal predecessors, (84912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-05-03 16:22:10,342 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-05-03 16:22:10,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:10,342 INFO L480 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-05-03 16:22:10,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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) [2021-05-03 16:22:10,342 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-05-03 16:22:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:22:10,389 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:10,389 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-05-03 16:22:10,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-03 16:22:10,590 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:10,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash 190972073, now seen corresponding path program 16 times [2021-05-03 16:22:10,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:10,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447528399] [2021-05-03 16:22:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 16:22:10,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447528399] [2021-05-03 16:22:10,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004553194] [2021-05-03 16:22:10,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:22:10,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:22:10,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:10,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:22:10,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 16:22:10,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:10,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-05-03 16:22:10,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720071262] [2021-05-03 16:22:10,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:22:10,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:10,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:22:10,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:22:10,714 INFO L87 Difference]: Start difference. First operand 20840 states and 84912 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:11,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:11,035 INFO L93 Difference]: Finished difference Result 28338 states and 112394 transitions. [2021-05-03 16:22:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:22:11,035 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:22:11,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:11,123 INFO L225 Difference]: With dead ends: 28338 [2021-05-03 16:22:11,123 INFO L226 Difference]: Without dead ends: 28230 [2021-05-03 16:22:11,124 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:22:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-05-03 16:22:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-05-03 16:22:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21970 states, 21969 states have (on average 4.097774136282944) internal successors, (90024), 21969 states have internal predecessors, (90024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-05-03 16:22:11,901 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-05-03 16:22:11,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:11,901 INFO L480 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-05-03 16:22:11,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-05-03 16:22:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:22:11,954 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:11,954 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-05-03 16:22:12,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 16:22:12,155 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:12,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:12,155 INFO L82 PathProgramCache]: Analyzing trace with hash 832677239, now seen corresponding path program 17 times [2021-05-03 16:22:12,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:12,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629089297] [2021-05-03 16:22:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 16:22:12,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629089297] [2021-05-03 16:22:12,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994450175] [2021-05-03 16:22:12,181 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 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 [2021-05-03 16:22:12,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:22:12,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:12,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:22:12,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 16:22:12,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:12,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 16:22:12,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689802348] [2021-05-03 16:22:12,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 16:22:12,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 16:22:12,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:22:12,269 INFO L87 Difference]: Start difference. First operand 21970 states and 90024 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:12,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:12,471 INFO L93 Difference]: Finished difference Result 29898 states and 123092 transitions. [2021-05-03 16:22:12,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 16:22:12,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:22:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:12,577 INFO L225 Difference]: With dead ends: 29898 [2021-05-03 16:22:12,577 INFO L226 Difference]: Without dead ends: 29898 [2021-05-03 16:22:12,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:22:12,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-05-03 16:22:13,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-05-03 16:22:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24224 states, 24223 states have (on average 4.093588737976304) internal successors, (99159), 24223 states have internal predecessors, (99159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-05-03 16:22:13,311 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-05-03 16:22:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:13,311 INFO L480 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-05-03 16:22:13,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:13,311 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-05-03 16:22:13,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 16:22:13,362 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:13,362 INFO L551 BasicCegarLoop]: trace histogram [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] [2021-05-03 16:22:13,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 16:22:13,562 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:13,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:13,563 INFO L82 PathProgramCache]: Analyzing trace with hash -97394957, now seen corresponding path program 18 times [2021-05-03 16:22:13,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:13,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959522902] [2021-05-03 16:22:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-03 16:22:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959522902] [2021-05-03 16:22:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550419111] [2021-05-03 16:22:13,589 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 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 [2021-05-03 16:22:13,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:22:13,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:13,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:22:13,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-03 16:22:13,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:13,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 16:22:13,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311037604] [2021-05-03 16:22:13,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 16:22:13,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:13,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 16:22:13,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:22:13,662 INFO L87 Difference]: Start difference. First operand 24224 states and 99159 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:13,891 INFO L93 Difference]: Finished difference Result 37062 states and 153499 transitions. [2021-05-03 16:22:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 16:22:13,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 16:22:13,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:14,277 INFO L225 Difference]: With dead ends: 37062 [2021-05-03 16:22:14,277 INFO L226 Difference]: Without dead ends: 37062 [2021-05-03 16:22:14,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:22:14,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-05-03 16:22:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-05-03 16:22:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34305 states, 34304 states have (on average 4.138496968283582) internal successors, (141967), 34304 states have internal predecessors, (141967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-05-03 16:22:15,287 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-05-03 16:22:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:15,287 INFO L480 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-05-03 16:22:15,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:15,287 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-05-03 16:22:15,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:22:15,371 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:15,372 INFO L551 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] [2021-05-03 16:22:15,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 16:22:15,572 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:15,573 INFO L82 PathProgramCache]: Analyzing trace with hash 411273525, now seen corresponding path program 19 times [2021-05-03 16:22:15,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:15,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046667413] [2021-05-03 16:22:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:15,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046667413] [2021-05-03 16:22:15,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019545260] [2021-05-03 16:22:15,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:22:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:15,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:22:15,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:16,028 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:22:16,029 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 28 treesize of output 16 [2021-05-03 16:22:16,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:16,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:16,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:16,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-05-03 16:22:16,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:22:16,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:16,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:16,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:16,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-05-03 16:22:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:16,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:16,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-03 16:22:16,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751325341] [2021-05-03 16:22:16,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:22:16,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:16,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:22:16,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:22:16,173 INFO L87 Difference]: Start difference. First operand 34305 states and 141967 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:16,753 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:22:17,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:17,897 INFO L93 Difference]: Finished difference Result 68650 states and 282459 transitions. [2021-05-03 16:22:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:22:17,898 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:22:17,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:18,171 INFO L225 Difference]: With dead ends: 68650 [2021-05-03 16:22:18,172 INFO L226 Difference]: Without dead ends: 68595 [2021-05-03 16:22:18,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 945.0ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:22:18,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68595 states. [2021-05-03 16:22:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68595 to 35386. [2021-05-03 16:22:19,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35386 states, 35385 states have (on average 4.1413310724883425) internal successors, (146541), 35385 states have internal predecessors, (146541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35386 states to 35386 states and 146541 transitions. [2021-05-03 16:22:19,689 INFO L78 Accepts]: Start accepts. Automaton has 35386 states and 146541 transitions. Word has length 39 [2021-05-03 16:22:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:19,689 INFO L480 AbstractCegarLoop]: Abstraction has 35386 states and 146541 transitions. [2021-05-03 16:22:19,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 35386 states and 146541 transitions. [2021-05-03 16:22:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:22:19,772 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:19,773 INFO L551 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] [2021-05-03 16:22:19,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:19,973 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:19,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1949174297, now seen corresponding path program 20 times [2021-05-03 16:22:19,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:19,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231584041] [2021-05-03 16:22:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:20,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231584041] [2021-05-03 16:22:20,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058863149] [2021-05-03 16:22:20,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:20,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:22:20,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:20,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:22:20,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:20,442 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:22:20,443 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 28 treesize of output 16 [2021-05-03 16:22:20,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:20,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:20,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:20,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-05-03 16:22:20,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:22:20,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:20,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:20,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:20,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:22:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:20,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:20,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:22:20,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460959020] [2021-05-03 16:22:20,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:22:20,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:20,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:22:20,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:22:20,608 INFO L87 Difference]: Start difference. First operand 35386 states and 146541 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:22,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:22,644 INFO L93 Difference]: Finished difference Result 63622 states and 260156 transitions. [2021-05-03 16:22:22,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:22:22,644 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:22:22,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:23,084 INFO L225 Difference]: With dead ends: 63622 [2021-05-03 16:22:23,084 INFO L226 Difference]: Without dead ends: 63406 [2021-05-03 16:22:23,085 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1256.5ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:22:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63406 states. [2021-05-03 16:22:24,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63406 to 35493. [2021-05-03 16:22:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35493 states, 35492 states have (on average 4.143947931928322) internal successors, (147077), 35492 states have internal predecessors, (147077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35493 states to 35493 states and 147077 transitions. [2021-05-03 16:22:24,480 INFO L78 Accepts]: Start accepts. Automaton has 35493 states and 147077 transitions. Word has length 39 [2021-05-03 16:22:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:24,480 INFO L480 AbstractCegarLoop]: Abstraction has 35493 states and 147077 transitions. [2021-05-03 16:22:24,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:24,481 INFO L276 IsEmpty]: Start isEmpty. Operand 35493 states and 147077 transitions. [2021-05-03 16:22:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:22:24,572 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:24,572 INFO L551 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] [2021-05-03 16:22:24,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 16:22:24,773 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:24,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:24,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1346065441, now seen corresponding path program 21 times [2021-05-03 16:22:24,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:24,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161395794] [2021-05-03 16:22:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:25,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161395794] [2021-05-03 16:22:25,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272688952] [2021-05-03 16:22:25,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:25,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:22:25,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:25,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:22:25,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:25,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:22:25,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:25,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-05-03 16:22:25,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:25,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:25,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:25,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:81 [2021-05-03 16:22:25,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:25,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-05-03 16:22:25,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:25,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:25,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:25,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-05-03 16:22:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:25,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:25,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:22:25,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541212904] [2021-05-03 16:22:25,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:22:25,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:25,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:22:25,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:22:25,670 INFO L87 Difference]: Start difference. First operand 35493 states and 147077 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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) [2021-05-03 16:22:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:28,047 INFO L93 Difference]: Finished difference Result 59288 states and 241076 transitions. [2021-05-03 16:22:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:22:28,048 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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 39 [2021-05-03 16:22:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:28,270 INFO L225 Difference]: With dead ends: 59288 [2021-05-03 16:22:28,270 INFO L226 Difference]: Without dead ends: 59124 [2021-05-03 16:22:28,271 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1329.5ms TimeCoverageRelationStatistics Valid=530, Invalid=2020, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:22:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59124 states. [2021-05-03 16:22:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59124 to 35683. [2021-05-03 16:22:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35683 states, 35682 states have (on average 4.1406031052071075) internal successors, (147745), 35682 states have internal predecessors, (147745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35683 states to 35683 states and 147745 transitions. [2021-05-03 16:22:29,676 INFO L78 Accepts]: Start accepts. Automaton has 35683 states and 147745 transitions. Word has length 39 [2021-05-03 16:22:29,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:29,676 INFO L480 AbstractCegarLoop]: Abstraction has 35683 states and 147745 transitions. [2021-05-03 16:22:29,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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) [2021-05-03 16:22:29,676 INFO L276 IsEmpty]: Start isEmpty. Operand 35683 states and 147745 transitions. [2021-05-03 16:22:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:22:29,775 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:29,775 INFO L551 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] [2021-05-03 16:22:29,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:29,975 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:29,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1267064945, now seen corresponding path program 22 times [2021-05-03 16:22:29,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:29,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419590995] [2021-05-03 16:22:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:30,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419590995] [2021-05-03 16:22:30,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016979465] [2021-05-03 16:22:30,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:22:30,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:22:30,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:30,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:22:30,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:30,547 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:22:30,547 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 28 treesize of output 16 [2021-05-03 16:22:30,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:30,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:30,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:30,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-05-03 16:22:30,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:22:30,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:30,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:30,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:30,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:22:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:30,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:30,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:22:30,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839873515] [2021-05-03 16:22:30,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:22:30,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:30,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:22:30,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:22:30,742 INFO L87 Difference]: Start difference. First operand 35683 states and 147745 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:32,891 INFO L93 Difference]: Finished difference Result 76962 states and 312761 transitions. [2021-05-03 16:22:32,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:22:32,892 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:22:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:33,168 INFO L225 Difference]: With dead ends: 76962 [2021-05-03 16:22:33,168 INFO L226 Difference]: Without dead ends: 76778 [2021-05-03 16:22:33,168 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1176.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:22:33,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76778 states. [2021-05-03 16:22:34,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76778 to 35521. [2021-05-03 16:22:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35521 states, 35520 states have (on average 4.1433277027027025) internal successors, (147171), 35520 states have internal predecessors, (147171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35521 states to 35521 states and 147171 transitions. [2021-05-03 16:22:34,530 INFO L78 Accepts]: Start accepts. Automaton has 35521 states and 147171 transitions. Word has length 39 [2021-05-03 16:22:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:34,530 INFO L480 AbstractCegarLoop]: Abstraction has 35521 states and 147171 transitions. [2021-05-03 16:22:34,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 35521 states and 147171 transitions. [2021-05-03 16:22:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:22:34,611 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:34,611 INFO L551 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] [2021-05-03 16:22:34,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 16:22:34,813 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:34,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2136317753, now seen corresponding path program 23 times [2021-05-03 16:22:34,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:34,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260185172] [2021-05-03 16:22:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:35,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260185172] [2021-05-03 16:22:35,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818364812] [2021-05-03 16:22:35,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:35,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:22:35,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:35,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:22:35,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:35,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:22:35,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:22:35,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:22:35,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:35,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-05-03 16:22:35,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:22:35,563 INFO L628 ElimStorePlain]: treesize reduction 22, result has 66.7 percent of original size [2021-05-03 16:22:35,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:35,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:45 [2021-05-03 16:22:35,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:22:35,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:35,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:35,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:35,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-05-03 16:22:35,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:22:35,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-05-03 16:22:35,764 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:22:35,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:35,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:35,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:3 [2021-05-03 16:22:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:35,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:35,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:22:35,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286188905] [2021-05-03 16:22:35,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:22:35,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:35,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:22:35,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:22:35,792 INFO L87 Difference]: Start difference. First operand 35521 states and 147171 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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) [2021-05-03 16:22:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:38,378 INFO L93 Difference]: Finished difference Result 62455 states and 255118 transitions. [2021-05-03 16:22:38,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:22:38,378 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 39 [2021-05-03 16:22:38,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:38,627 INFO L225 Difference]: With dead ends: 62455 [2021-05-03 16:22:38,628 INFO L226 Difference]: Without dead ends: 62400 [2021-05-03 16:22:38,628 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1549.1ms TimeCoverageRelationStatistics Valid=290, Invalid=2362, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:22:38,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62400 states. [2021-05-03 16:22:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62400 to 36126. [2021-05-03 16:22:39,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36126 states, 36125 states have (on average 4.140013840830449) internal successors, (149558), 36125 states have internal predecessors, (149558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36126 states to 36126 states and 149558 transitions. [2021-05-03 16:22:39,819 INFO L78 Accepts]: Start accepts. Automaton has 36126 states and 149558 transitions. Word has length 39 [2021-05-03 16:22:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:39,820 INFO L480 AbstractCegarLoop]: Abstraction has 36126 states and 149558 transitions. [2021-05-03 16:22:39,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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) [2021-05-03 16:22:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 36126 states and 149558 transitions. [2021-05-03 16:22:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:22:39,907 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:39,907 INFO L551 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] [2021-05-03 16:22:40,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 16:22:40,117 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:40,117 INFO L82 PathProgramCache]: Analyzing trace with hash -201798279, now seen corresponding path program 24 times [2021-05-03 16:22:40,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:40,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337008030] [2021-05-03 16:22:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:40,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337008030] [2021-05-03 16:22:40,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738585632] [2021-05-03 16:22:40,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:40,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:22:40,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:40,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 16:22:40,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:40,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:40,694 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 26 treesize of output 44 [2021-05-03 16:22:40,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:40,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:40,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:40,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2021-05-03 16:22:40,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:22:40,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:40,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:40,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:40,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:22:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:40,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:40,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:22:40,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630955679] [2021-05-03 16:22:40,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:22:40,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:40,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:22:40,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:22:40,911 INFO L87 Difference]: Start difference. First operand 36126 states and 149558 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:43,314 INFO L93 Difference]: Finished difference Result 62047 states and 253181 transitions. [2021-05-03 16:22:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:22:43,315 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:22:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:43,795 INFO L225 Difference]: With dead ends: 62047 [2021-05-03 16:22:43,795 INFO L226 Difference]: Without dead ends: 61919 [2021-05-03 16:22:43,796 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1549.8ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 16:22:43,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61919 states. [2021-05-03 16:22:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61919 to 36244. [2021-05-03 16:22:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36244 states, 36243 states have (on average 4.138454322213945) internal successors, (149990), 36243 states have internal predecessors, (149990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36244 states to 36244 states and 149990 transitions. [2021-05-03 16:22:45,048 INFO L78 Accepts]: Start accepts. Automaton has 36244 states and 149990 transitions. Word has length 39 [2021-05-03 16:22:45,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:45,048 INFO L480 AbstractCegarLoop]: Abstraction has 36244 states and 149990 transitions. [2021-05-03 16:22:45,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:45,048 INFO L276 IsEmpty]: Start isEmpty. Operand 36244 states and 149990 transitions. [2021-05-03 16:22:45,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:22:45,135 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:45,135 INFO L551 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] [2021-05-03 16:22:45,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-03 16:22:45,337 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash 401310577, now seen corresponding path program 25 times [2021-05-03 16:22:45,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:45,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705546382] [2021-05-03 16:22:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:45,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705546382] [2021-05-03 16:22:45,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285054076] [2021-05-03 16:22:45,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:45,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:22:45,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:45,867 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:22:45,867 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 28 treesize of output 16 [2021-05-03 16:22:45,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:45,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:45,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:45,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-05-03 16:22:45,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:22:45,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:45,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:45,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:45,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:22:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:46,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:46,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:22:46,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195883543] [2021-05-03 16:22:46,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:22:46,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:46,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:22:46,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:22:46,024 INFO L87 Difference]: Start difference. First operand 36244 states and 149990 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:47,717 INFO L93 Difference]: Finished difference Result 63583 states and 260022 transitions. [2021-05-03 16:22:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:22:47,717 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:22:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:47,950 INFO L225 Difference]: With dead ends: 63583 [2021-05-03 16:22:47,950 INFO L226 Difference]: Without dead ends: 63391 [2021-05-03 16:22:47,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1011.3ms TimeCoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:22:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63391 states. [2021-05-03 16:22:48,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63391 to 36222. [2021-05-03 16:22:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36222 states, 36221 states have (on average 4.139007757930482) internal successors, (149919), 36221 states have internal predecessors, (149919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36222 states to 36222 states and 149919 transitions. [2021-05-03 16:22:49,082 INFO L78 Accepts]: Start accepts. Automaton has 36222 states and 149919 transitions. Word has length 39 [2021-05-03 16:22:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:49,083 INFO L480 AbstractCegarLoop]: Abstraction has 36222 states and 149919 transitions. [2021-05-03 16:22:49,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 36222 states and 149919 transitions. [2021-05-03 16:22:49,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:22:49,161 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:49,161 INFO L551 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] [2021-05-03 16:22:49,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:49,365 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash 337270923, now seen corresponding path program 26 times [2021-05-03 16:22:49,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:49,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342719070] [2021-05-03 16:22:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:49,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342719070] [2021-05-03 16:22:49,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505002871] [2021-05-03 16:22:49,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:22:49,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:22:49,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:49,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:22:49,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:49,839 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:22:49,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:22:49,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:49,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:49,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:49,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-05-03 16:22:49,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:22:49,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:49,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:49,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:49,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-05-03 16:22:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:49,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:49,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:22:49,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143465862] [2021-05-03 16:22:49,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:22:49,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:49,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:22:49,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:22:49,982 INFO L87 Difference]: Start difference. First operand 36222 states and 149919 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:52,361 INFO L93 Difference]: Finished difference Result 90257 states and 367920 transitions. [2021-05-03 16:22:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:22:52,361 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:22:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:52,887 INFO L225 Difference]: With dead ends: 90257 [2021-05-03 16:22:52,887 INFO L226 Difference]: Without dead ends: 90202 [2021-05-03 16:22:52,888 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1133.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:22:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90202 states. [2021-05-03 16:22:54,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90202 to 36036. [2021-05-03 16:22:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36036 states, 36035 states have (on average 4.137810462050784) internal successors, (149106), 36035 states have internal predecessors, (149106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 149106 transitions. [2021-05-03 16:22:54,345 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 149106 transitions. Word has length 39 [2021-05-03 16:22:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:22:54,345 INFO L480 AbstractCegarLoop]: Abstraction has 36036 states and 149106 transitions. [2021-05-03 16:22:54,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 149106 transitions. [2021-05-03 16:22:54,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:22:54,432 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:22:54,432 INFO L551 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] [2021-05-03 16:22:54,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 16:22:54,633 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:22:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:22:54,633 INFO L82 PathProgramCache]: Analyzing trace with hash -571608753, now seen corresponding path program 27 times [2021-05-03 16:22:54,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:22:54,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761031446] [2021-05-03 16:22:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:22:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:22:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:54,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761031446] [2021-05-03 16:22:54,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710660722] [2021-05-03 16:22:54,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:22:55,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:22:55,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:22:55,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 16:22:55,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:22:55,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:22:55,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:55,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-05-03 16:22:55,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:55,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:55,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:55,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:89 [2021-05-03 16:22:55,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:22:55,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:22:55,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:55,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:22:55,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:16 [2021-05-03 16:22:55,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:22:55,488 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 16:22:55,490 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:22:55,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:22:55,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:22:55,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-05-03 16:22:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:22:55,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:22:55,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:22:55,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307906588] [2021-05-03 16:22:55,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:22:55,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:22:55,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:22:55,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:22:55,521 INFO L87 Difference]: Start difference. First operand 36036 states and 149106 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:22:56,585 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:22:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:22:58,428 INFO L93 Difference]: Finished difference Result 76321 states and 309332 transitions. [2021-05-03 16:22:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 16:22:58,429 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:22:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:22:58,916 INFO L225 Difference]: With dead ends: 76321 [2021-05-03 16:22:58,916 INFO L226 Difference]: Without dead ends: 76049 [2021-05-03 16:22:58,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1943.3ms TimeCoverageRelationStatistics Valid=484, Invalid=2708, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 16:22:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76049 states. [2021-05-03 16:22:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76049 to 35555. [2021-05-03 16:22:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35555 states, 35554 states have (on average 4.1431906395904825) internal successors, (147307), 35554 states have internal predecessors, (147307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35555 states to 35555 states and 147307 transitions. [2021-05-03 16:23:00,246 INFO L78 Accepts]: Start accepts. Automaton has 35555 states and 147307 transitions. Word has length 39 [2021-05-03 16:23:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:00,246 INFO L480 AbstractCegarLoop]: Abstraction has 35555 states and 147307 transitions. [2021-05-03 16:23:00,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 35555 states and 147307 transitions. [2021-05-03 16:23:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:00,332 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:00,332 INFO L551 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] [2021-05-03 16:23:00,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:00,545 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1628962993, now seen corresponding path program 28 times [2021-05-03 16:23:00,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:00,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797035430] [2021-05-03 16:23:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:00,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797035430] [2021-05-03 16:23:00,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172996149] [2021-05-03 16:23:00,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:00,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:23:00,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:00,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:23:00,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:01,053 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:23:01,053 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 28 treesize of output 16 [2021-05-03 16:23:01,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:01,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:01,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:01,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-05-03 16:23:01,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:23:01,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:01,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:01,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:01,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-05-03 16:23:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:01,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:01,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-03 16:23:01,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952478670] [2021-05-03 16:23:01,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:23:01,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:01,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:23:01,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:23:01,150 INFO L87 Difference]: Start difference. First operand 35555 states and 147307 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:02,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:02,898 INFO L93 Difference]: Finished difference Result 69258 states and 285506 transitions. [2021-05-03 16:23:02,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:23:02,899 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:02,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:03,146 INFO L225 Difference]: With dead ends: 69258 [2021-05-03 16:23:03,146 INFO L226 Difference]: Without dead ends: 69203 [2021-05-03 16:23:03,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 839.7ms TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:23:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69203 states. [2021-05-03 16:23:04,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69203 to 35829. [2021-05-03 16:23:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35829 states, 35828 states have (on average 4.142095567712404) internal successors, (148403), 35828 states have internal predecessors, (148403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35829 states to 35829 states and 148403 transitions. [2021-05-03 16:23:04,371 INFO L78 Accepts]: Start accepts. Automaton has 35829 states and 148403 transitions. Word has length 39 [2021-05-03 16:23:04,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:04,371 INFO L480 AbstractCegarLoop]: Abstraction has 35829 states and 148403 transitions. [2021-05-03 16:23:04,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:04,372 INFO L276 IsEmpty]: Start isEmpty. Operand 35829 states and 148403 transitions. [2021-05-03 16:23:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:04,453 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:04,453 INFO L551 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] [2021-05-03 16:23:04,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:04,653 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:04,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:04,654 INFO L82 PathProgramCache]: Analyzing trace with hash -731484829, now seen corresponding path program 29 times [2021-05-03 16:23:04,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:04,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596766394] [2021-05-03 16:23:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:04,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596766394] [2021-05-03 16:23:04,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751039658] [2021-05-03 16:23:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:05,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:23:05,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:05,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 16:23:05,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:05,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:05,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:23:05,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:05,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:05,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:23:05,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:47 [2021-05-03 16:23:05,855 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:23:05,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:05,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:05,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:05,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:23:05,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:05,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:05,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:05,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:13 [2021-05-03 16:23:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:06,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:06,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:23:06,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326631359] [2021-05-03 16:23:06,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:23:06,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:23:06,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:23:06,013 INFO L87 Difference]: Start difference. First operand 35829 states and 148403 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:09,468 INFO L93 Difference]: Finished difference Result 62177 states and 253641 transitions. [2021-05-03 16:23:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 16:23:09,469 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:09,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:09,693 INFO L225 Difference]: With dead ends: 62177 [2021-05-03 16:23:09,693 INFO L226 Difference]: Without dead ends: 61975 [2021-05-03 16:23:09,694 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 2043.9ms TimeCoverageRelationStatistics Valid=432, Invalid=2874, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:23:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61975 states. [2021-05-03 16:23:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61975 to 36176. [2021-05-03 16:23:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36176 states, 36175 states have (on average 4.138078783690394) internal successors, (149695), 36175 states have internal predecessors, (149695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36176 states to 36176 states and 149695 transitions. [2021-05-03 16:23:10,890 INFO L78 Accepts]: Start accepts. Automaton has 36176 states and 149695 transitions. Word has length 39 [2021-05-03 16:23:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:10,890 INFO L480 AbstractCegarLoop]: Abstraction has 36176 states and 149695 transitions. [2021-05-03 16:23:10,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 36176 states and 149695 transitions. [2021-05-03 16:23:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:10,958 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:10,958 INFO L551 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] [2021-05-03 16:23:11,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-03 16:23:11,159 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:11,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:11,159 INFO L82 PathProgramCache]: Analyzing trace with hash -869929743, now seen corresponding path program 30 times [2021-05-03 16:23:11,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:11,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469858505] [2021-05-03 16:23:11,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:11,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469858505] [2021-05-03 16:23:11,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9930635] [2021-05-03 16:23:11,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:11,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:23:11,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:11,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 16:23:11,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:11,745 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:23:11,745 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 28 treesize of output 16 [2021-05-03 16:23:11,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:11,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:11,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:11,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-05-03 16:23:11,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:23:11,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:11,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:11,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:11,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:23:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:11,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:11,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:23:11,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977569616] [2021-05-03 16:23:11,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:23:11,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:11,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:23:11,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:23:11,897 INFO L87 Difference]: Start difference. First operand 36176 states and 149695 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:13,230 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-05-03 16:23:14,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:14,518 INFO L93 Difference]: Finished difference Result 78317 states and 318209 transitions. [2021-05-03 16:23:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 16:23:14,519 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:14,793 INFO L225 Difference]: With dead ends: 78317 [2021-05-03 16:23:14,794 INFO L226 Difference]: Without dead ends: 78101 [2021-05-03 16:23:14,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1538.4ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:23:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78101 states. [2021-05-03 16:23:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78101 to 35679. [2021-05-03 16:23:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35679 states, 35678 states have (on average 4.143029317786872) internal successors, (147815), 35678 states have internal predecessors, (147815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35679 states to 35679 states and 147815 transitions. [2021-05-03 16:23:16,195 INFO L78 Accepts]: Start accepts. Automaton has 35679 states and 147815 transitions. Word has length 39 [2021-05-03 16:23:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:16,195 INFO L480 AbstractCegarLoop]: Abstraction has 35679 states and 147815 transitions. [2021-05-03 16:23:16,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 35679 states and 147815 transitions. [2021-05-03 16:23:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:16,281 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:16,281 INFO L551 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] [2021-05-03 16:23:16,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:16,481 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:16,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:16,482 INFO L82 PathProgramCache]: Analyzing trace with hash 471732141, now seen corresponding path program 31 times [2021-05-03 16:23:16,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:16,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990101644] [2021-05-03 16:23:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:17,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990101644] [2021-05-03 16:23:17,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933758545] [2021-05-03 16:23:17,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:23:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:17,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:23:17,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:17,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:23:17,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:17,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:17,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:17,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:23:17,385 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:23:17,386 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 34 treesize of output 22 [2021-05-03 16:23:17,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:17,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:17,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:17,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-05-03 16:23:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:17,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:17,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-03 16:23:17,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198484361] [2021-05-03 16:23:17,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:23:17,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:17,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:23:17,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:23:17,444 INFO L87 Difference]: Start difference. First operand 35679 states and 147815 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:19,361 INFO L93 Difference]: Finished difference Result 71308 states and 293693 transitions. [2021-05-03 16:23:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:23:19,362 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:19,618 INFO L225 Difference]: With dead ends: 71308 [2021-05-03 16:23:19,618 INFO L226 Difference]: Without dead ends: 71253 [2021-05-03 16:23:19,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 931.6ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:23:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71253 states. [2021-05-03 16:23:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71253 to 36115. [2021-05-03 16:23:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36115 states, 36114 states have (on average 4.146120618042865) internal successors, (149733), 36114 states have internal predecessors, (149733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36115 states to 36115 states and 149733 transitions. [2021-05-03 16:23:20,883 INFO L78 Accepts]: Start accepts. Automaton has 36115 states and 149733 transitions. Word has length 39 [2021-05-03 16:23:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:20,884 INFO L480 AbstractCegarLoop]: Abstraction has 36115 states and 149733 transitions. [2021-05-03 16:23:20,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 36115 states and 149733 transitions. [2021-05-03 16:23:20,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:20,968 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:20,968 INFO L551 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] [2021-05-03 16:23:21,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-03 16:23:21,169 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:21,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:21,169 INFO L82 PathProgramCache]: Analyzing trace with hash -165855889, now seen corresponding path program 32 times [2021-05-03 16:23:21,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:21,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264523930] [2021-05-03 16:23:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:21,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264523930] [2021-05-03 16:23:21,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025614298] [2021-05-03 16:23:21,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:21,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:23:21,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:21,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:23:21,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:21,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:23:21,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:21,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:21,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:21,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-05-03 16:23:21,831 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:23:21,831 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 41 treesize of output 29 [2021-05-03 16:23:21,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:21,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:21,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:21,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-05-03 16:23:21,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:21,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:23:21,879 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:23:21,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:21,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:23:21,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-05-03 16:23:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:21,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:21,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:23:21,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650839298] [2021-05-03 16:23:21,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:23:21,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:21,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:23:21,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:23:21,937 INFO L87 Difference]: Start difference. First operand 36115 states and 149733 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:24,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:24,692 INFO L93 Difference]: Finished difference Result 91528 states and 377511 transitions. [2021-05-03 16:23:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:23:24,695 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:25,034 INFO L225 Difference]: With dead ends: 91528 [2021-05-03 16:23:25,034 INFO L226 Difference]: Without dead ends: 91473 [2021-05-03 16:23:25,035 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1506.1ms TimeCoverageRelationStatistics Valid=360, Invalid=2190, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:23:25,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91473 states. [2021-05-03 16:23:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91473 to 36355. [2021-05-03 16:23:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36355 states, 36354 states have (on average 4.147906695274248) internal successors, (150793), 36354 states have internal predecessors, (150793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36355 states to 36355 states and 150793 transitions. [2021-05-03 16:23:26,687 INFO L78 Accepts]: Start accepts. Automaton has 36355 states and 150793 transitions. Word has length 39 [2021-05-03 16:23:26,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:26,688 INFO L480 AbstractCegarLoop]: Abstraction has 36355 states and 150793 transitions. [2021-05-03 16:23:26,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 36355 states and 150793 transitions. [2021-05-03 16:23:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:27,062 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:27,062 INFO L551 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] [2021-05-03 16:23:27,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:27,273 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1253137135, now seen corresponding path program 33 times [2021-05-03 16:23:27,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:27,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223480503] [2021-05-03 16:23:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:27,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223480503] [2021-05-03 16:23:27,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555018266] [2021-05-03 16:23:27,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:27,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:23:27,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:27,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 16:23:27,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:27,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 16:23:27,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:27,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:27,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:27,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-05-03 16:23:27,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:28,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:28,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-05-03 16:23:28,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:28,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:28,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:23:28,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:77 [2021-05-03 16:23:28,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:28,096 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 11 treesize of output 16 [2021-05-03 16:23:28,098 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:23:28,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:28,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-05-03 16:23:28,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:28,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:28,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:23:28,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-05-03 16:23:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:28,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:28,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-05-03 16:23:28,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226981531] [2021-05-03 16:23:28,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:23:28,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:28,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:23:28,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:23:28,263 INFO L87 Difference]: Start difference. First operand 36355 states and 150793 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:33,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:33,756 INFO L93 Difference]: Finished difference Result 96064 states and 394680 transitions. [2021-05-03 16:23:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 16:23:33,757 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:33,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:34,102 INFO L225 Difference]: With dead ends: 96064 [2021-05-03 16:23:34,102 INFO L226 Difference]: Without dead ends: 95970 [2021-05-03 16:23:34,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 3255.1ms TimeCoverageRelationStatistics Valid=780, Invalid=5226, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 16:23:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95970 states. [2021-05-03 16:23:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95970 to 37015. [2021-05-03 16:23:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37015 states, 37014 states have (on average 4.146566164154104) internal successors, (153481), 37014 states have internal predecessors, (153481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37015 states to 37015 states and 153481 transitions. [2021-05-03 16:23:35,653 INFO L78 Accepts]: Start accepts. Automaton has 37015 states and 153481 transitions. Word has length 39 [2021-05-03 16:23:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:35,653 INFO L480 AbstractCegarLoop]: Abstraction has 37015 states and 153481 transitions. [2021-05-03 16:23:35,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 37015 states and 153481 transitions. [2021-05-03 16:23:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:35,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:35,744 INFO L551 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] [2021-05-03 16:23:35,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-03 16:23:35,945 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:35,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:35,945 INFO L82 PathProgramCache]: Analyzing trace with hash -555822351, now seen corresponding path program 34 times [2021-05-03 16:23:35,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:35,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714126822] [2021-05-03 16:23:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:36,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714126822] [2021-05-03 16:23:36,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379577018] [2021-05-03 16:23:36,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:36,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:23:36,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:36,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:23:36,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:36,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:23:36,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:36,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:36,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:36,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:23:36,605 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:23:36,606 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 39 treesize of output 27 [2021-05-03 16:23:36,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:36,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:36,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:36,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:23:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:36,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:36,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:23:36,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039422253] [2021-05-03 16:23:36,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:23:36,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:36,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:23:36,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:23:36,664 INFO L87 Difference]: Start difference. First operand 37015 states and 153481 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:37,508 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 16:23:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:39,571 INFO L93 Difference]: Finished difference Result 106237 states and 431864 transitions. [2021-05-03 16:23:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:23:39,572 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:40,306 INFO L225 Difference]: With dead ends: 106237 [2021-05-03 16:23:40,306 INFO L226 Difference]: Without dead ends: 106182 [2021-05-03 16:23:40,307 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1620.9ms TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 16:23:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106182 states. [2021-05-03 16:23:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106182 to 36507. [2021-05-03 16:23:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36507 states, 36506 states have (on average 4.150577987180189) internal successors, (151521), 36506 states have internal predecessors, (151521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36507 states to 36507 states and 151521 transitions. [2021-05-03 16:23:41,903 INFO L78 Accepts]: Start accepts. Automaton has 36507 states and 151521 transitions. Word has length 39 [2021-05-03 16:23:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:41,903 INFO L480 AbstractCegarLoop]: Abstraction has 36507 states and 151521 transitions. [2021-05-03 16:23:41,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:41,903 INFO L276 IsEmpty]: Start isEmpty. Operand 36507 states and 151521 transitions. [2021-05-03 16:23:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:41,987 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:41,987 INFO L551 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] [2021-05-03 16:23:42,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-03 16:23:42,187 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:42,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1564815849, now seen corresponding path program 35 times [2021-05-03 16:23:42,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:42,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868111590] [2021-05-03 16:23:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:42,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:42,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868111590] [2021-05-03 16:23:42,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735228510] [2021-05-03 16:23:42,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:42,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:23:42,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:23:42,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:43,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:43,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:43,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:43,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:43,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-05-03 16:23:43,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:23:43,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:43,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:23:43,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:77, output treesize:59 [2021-05-03 16:23:43,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:43,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:43,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:43,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:23:43,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 16:23:43,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:43,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:43,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:23:43,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:27 [2021-05-03 16:23:43,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:43,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:43,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:23:43,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:43,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-05-03 16:23:43,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:23:43,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:43,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:23:43,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 16:23:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:43,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:43,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:23:43,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426276916] [2021-05-03 16:23:43,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:23:43,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:43,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:23:43,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:23:43,551 INFO L87 Difference]: Start difference. First operand 36507 states and 151521 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:49,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:49,043 INFO L93 Difference]: Finished difference Result 68781 states and 280972 transitions. [2021-05-03 16:23:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 16:23:49,044 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:49,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:49,290 INFO L225 Difference]: With dead ends: 68781 [2021-05-03 16:23:49,290 INFO L226 Difference]: Without dead ends: 68560 [2021-05-03 16:23:49,291 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 3691.4ms TimeCoverageRelationStatistics Valid=732, Invalid=4380, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 16:23:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68560 states. [2021-05-03 16:23:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68560 to 37012. [2021-05-03 16:23:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37012 states, 37011 states have (on average 4.144254410850828) internal successors, (153383), 37011 states have internal predecessors, (153383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37012 states to 37012 states and 153383 transitions. [2021-05-03 16:23:50,595 INFO L78 Accepts]: Start accepts. Automaton has 37012 states and 153383 transitions. Word has length 39 [2021-05-03 16:23:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:50,596 INFO L480 AbstractCegarLoop]: Abstraction has 37012 states and 153383 transitions. [2021-05-03 16:23:50,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:50,596 INFO L276 IsEmpty]: Start isEmpty. Operand 37012 states and 153383 transitions. [2021-05-03 16:23:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:50,692 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:50,692 INFO L551 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] [2021-05-03 16:23:50,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:50,892 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:50,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:50,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1669092457, now seen corresponding path program 36 times [2021-05-03 16:23:50,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:50,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137843142] [2021-05-03 16:23:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:51,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137843142] [2021-05-03 16:23:51,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237043939] [2021-05-03 16:23:51,352 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 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 [2021-05-03 16:23:51,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:23:51,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:23:51,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 16:23:51,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:51,669 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:23:51,670 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 21 [2021-05-03 16:23:51,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:51,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:51,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:51,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-05-03 16:23:51,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:23:51,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:51,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:51,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:51,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:23:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:51,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:51,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:23:51,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773453093] [2021-05-03 16:23:51,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:23:51,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:23:51,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:23:51,780 INFO L87 Difference]: Start difference. First operand 37012 states and 153383 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:23:54,860 INFO L93 Difference]: Finished difference Result 79074 states and 321254 transitions. [2021-05-03 16:23:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:23:54,861 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:23:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:23:55,157 INFO L225 Difference]: With dead ends: 79074 [2021-05-03 16:23:55,158 INFO L226 Difference]: Without dead ends: 78850 [2021-05-03 16:23:55,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1614.1ms TimeCoverageRelationStatistics Valid=422, Invalid=2028, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 16:23:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78850 states. [2021-05-03 16:23:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78850 to 36693. [2021-05-03 16:23:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36693 states, 36692 states have (on average 4.1486155020167885) internal successors, (152221), 36692 states have internal predecessors, (152221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36693 states to 36693 states and 152221 transitions. [2021-05-03 16:23:56,579 INFO L78 Accepts]: Start accepts. Automaton has 36693 states and 152221 transitions. Word has length 39 [2021-05-03 16:23:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:23:56,579 INFO L480 AbstractCegarLoop]: Abstraction has 36693 states and 152221 transitions. [2021-05-03 16:23:56,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:23:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 36693 states and 152221 transitions. [2021-05-03 16:23:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:23:56,922 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:23:56,922 INFO L551 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] [2021-05-03 16:23:57,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:57,137 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:23:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:23:57,137 INFO L82 PathProgramCache]: Analyzing trace with hash 452270203, now seen corresponding path program 37 times [2021-05-03 16:23:57,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:23:57,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721542479] [2021-05-03 16:23:57,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:23:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:57,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721542479] [2021-05-03 16:23:57,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743212692] [2021-05-03 16:23:57,580 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:23:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:23:57,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:23:57,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:23:57,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:23:57,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:57,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:57,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:57,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:23:57,956 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:23:57,957 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 39 treesize of output 27 [2021-05-03 16:23:57,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:23:57,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:23:57,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:23:57,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:23:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:23:58,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:23:58,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:23:58,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809334814] [2021-05-03 16:23:58,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:23:58,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:23:58,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:23:58,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:23:58,029 INFO L87 Difference]: Start difference. First operand 36693 states and 152221 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:00,577 INFO L93 Difference]: Finished difference Result 80869 states and 329178 transitions. [2021-05-03 16:24:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:24:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:00,869 INFO L225 Difference]: With dead ends: 80869 [2021-05-03 16:24:00,869 INFO L226 Difference]: Without dead ends: 80701 [2021-05-03 16:24:00,869 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1473.8ms TimeCoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:24:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80701 states. [2021-05-03 16:24:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80701 to 36755. [2021-05-03 16:24:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36755 states, 36754 states have (on average 4.149561952440551) internal successors, (152513), 36754 states have internal predecessors, (152513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36755 states to 36755 states and 152513 transitions. [2021-05-03 16:24:02,245 INFO L78 Accepts]: Start accepts. Automaton has 36755 states and 152513 transitions. Word has length 39 [2021-05-03 16:24:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:02,245 INFO L480 AbstractCegarLoop]: Abstraction has 36755 states and 152513 transitions. [2021-05-03 16:24:02,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:02,245 INFO L276 IsEmpty]: Start isEmpty. Operand 36755 states and 152513 transitions. [2021-05-03 16:24:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:02,331 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:02,331 INFO L551 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] [2021-05-03 16:24:02,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:02,531 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:02,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:02,532 INFO L82 PathProgramCache]: Analyzing trace with hash 656190949, now seen corresponding path program 38 times [2021-05-03 16:24:02,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:02,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042098793] [2021-05-03 16:24:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:02,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042098793] [2021-05-03 16:24:02,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599712685] [2021-05-03 16:24:02,936 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:02,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:24:02,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:02,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:24:02,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:03,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:24:03,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:03,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:03,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:03,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:24:03,299 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:24:03,299 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 39 treesize of output 27 [2021-05-03 16:24:03,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:03,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:03,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:03,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:24:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:03,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:03,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:24:03,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514892990] [2021-05-03 16:24:03,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:24:03,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:03,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:24:03,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:24:03,364 INFO L87 Difference]: Start difference. First operand 36755 states and 152513 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:05,503 INFO L93 Difference]: Finished difference Result 67634 states and 276737 transitions. [2021-05-03 16:24:05,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:24:05,504 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:05,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:05,746 INFO L225 Difference]: With dead ends: 67634 [2021-05-03 16:24:05,746 INFO L226 Difference]: Without dead ends: 67544 [2021-05-03 16:24:05,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1146.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:24:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67544 states. [2021-05-03 16:24:06,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67544 to 36721. [2021-05-03 16:24:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 36720 states have (on average 4.15291394335512) internal successors, (152495), 36720 states have internal predecessors, (152495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:07,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 152495 transitions. [2021-05-03 16:24:07,129 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 152495 transitions. Word has length 39 [2021-05-03 16:24:07,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:07,130 INFO L480 AbstractCegarLoop]: Abstraction has 36721 states and 152495 transitions. [2021-05-03 16:24:07,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:07,130 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 152495 transitions. [2021-05-03 16:24:07,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:07,215 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:07,215 INFO L551 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] [2021-05-03 16:24:07,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-03 16:24:07,416 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:07,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:07,417 INFO L82 PathProgramCache]: Analyzing trace with hash -6081193, now seen corresponding path program 39 times [2021-05-03 16:24:07,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:07,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751296697] [2021-05-03 16:24:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:07,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751296697] [2021-05-03 16:24:07,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985593758] [2021-05-03 16:24:07,884 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:07,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:24:07,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:07,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:24:07,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:08,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:08,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:08,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-05-03 16:24:08,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:08,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:08,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:08,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:109 [2021-05-03 16:24:08,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:24:08,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:08,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:08,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:08,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:24:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:08,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:08,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:24:08,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461942942] [2021-05-03 16:24:08,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:24:08,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:08,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:24:08,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:24:08,733 INFO L87 Difference]: Start difference. First operand 36721 states and 152495 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:11,257 INFO L93 Difference]: Finished difference Result 61224 states and 250106 transitions. [2021-05-03 16:24:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:24:11,258 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:11,689 INFO L225 Difference]: With dead ends: 61224 [2021-05-03 16:24:11,690 INFO L226 Difference]: Without dead ends: 61096 [2021-05-03 16:24:11,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1622.9ms TimeCoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:24:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61096 states. [2021-05-03 16:24:12,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61096 to 37078. [2021-05-03 16:24:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37078 states, 37077 states have (on average 4.147342017962618) internal successors, (153771), 37077 states have internal predecessors, (153771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37078 states to 37078 states and 153771 transitions. [2021-05-03 16:24:12,641 INFO L78 Accepts]: Start accepts. Automaton has 37078 states and 153771 transitions. Word has length 39 [2021-05-03 16:24:12,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:12,641 INFO L480 AbstractCegarLoop]: Abstraction has 37078 states and 153771 transitions. [2021-05-03 16:24:12,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 37078 states and 153771 transitions. [2021-05-03 16:24:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:12,903 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:12,903 INFO L551 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] [2021-05-03 16:24:13,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:13,119 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:13,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2130742231, now seen corresponding path program 40 times [2021-05-03 16:24:13,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:13,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429695513] [2021-05-03 16:24:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:13,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429695513] [2021-05-03 16:24:13,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5935914] [2021-05-03 16:24:13,569 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:13,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:24:13,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:13,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:24:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:13,874 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:24:13,875 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 21 [2021-05-03 16:24:13,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:13,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:13,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:13,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-05-03 16:24:13,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:24:13,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:13,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:13,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:13,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:24:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:14,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:14,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:24:14,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321980274] [2021-05-03 16:24:14,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:24:14,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:14,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:24:14,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:24:14,038 INFO L87 Difference]: Start difference. First operand 37078 states and 153771 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:16,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:16,496 INFO L93 Difference]: Finished difference Result 78252 states and 318289 transitions. [2021-05-03 16:24:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:24:16,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:16,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:16,806 INFO L225 Difference]: With dead ends: 78252 [2021-05-03 16:24:16,807 INFO L226 Difference]: Without dead ends: 78068 [2021-05-03 16:24:16,807 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1556.4ms TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:24:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78068 states. [2021-05-03 16:24:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78068 to 36745. [2021-05-03 16:24:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36745 states, 36744 states have (on average 4.1524874809492704) internal successors, (152579), 36744 states have internal predecessors, (152579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:18,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36745 states to 36745 states and 152579 transitions. [2021-05-03 16:24:18,240 INFO L78 Accepts]: Start accepts. Automaton has 36745 states and 152579 transitions. Word has length 39 [2021-05-03 16:24:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:18,240 INFO L480 AbstractCegarLoop]: Abstraction has 36745 states and 152579 transitions. [2021-05-03 16:24:18,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:18,241 INFO L276 IsEmpty]: Start isEmpty. Operand 36745 states and 152579 transitions. [2021-05-03 16:24:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:18,333 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:18,333 INFO L551 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] [2021-05-03 16:24:18,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:18,533 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:18,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2143700845, now seen corresponding path program 41 times [2021-05-03 16:24:18,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:18,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980028569] [2021-05-03 16:24:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:19,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980028569] [2021-05-03 16:24:19,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869422770] [2021-05-03 16:24:19,027 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:19,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:24:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:19,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 16:24:19,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:19,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:19,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:19,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:19,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:19,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-05-03 16:24:19,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:24:19,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:19,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:24:19,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:56 [2021-05-03 16:24:19,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:19,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:24:19,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:19,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:24:19,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:24:19,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:19,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:19,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:24:19,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:27 [2021-05-03 16:24:19,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:19,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:19,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:19,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:19,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-05-03 16:24:19,976 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:24:19,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:19,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:24:19,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 16:24:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:20,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:20,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:24:20,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322917748] [2021-05-03 16:24:20,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:24:20,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:24:20,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:24:20,068 INFO L87 Difference]: Start difference. First operand 36745 states and 152579 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:26,508 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2021-05-03 16:24:27,009 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-05-03 16:24:28,239 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-05-03 16:24:28,474 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2021-05-03 16:24:31,485 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-05-03 16:24:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:32,763 INFO L93 Difference]: Finished difference Result 81058 states and 330146 transitions. [2021-05-03 16:24:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-03 16:24:32,764 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:33,065 INFO L225 Difference]: With dead ends: 81058 [2021-05-03 16:24:33,065 INFO L226 Difference]: Without dead ends: 80725 [2021-05-03 16:24:33,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3819 ImplicationChecksByTransitivity, 8280.5ms TimeCoverageRelationStatistics Valid=1233, Invalid=10977, Unknown=0, NotChecked=0, Total=12210 [2021-05-03 16:24:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80725 states. [2021-05-03 16:24:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80725 to 37394. [2021-05-03 16:24:34,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37394 states, 37393 states have (on average 4.148236300911935) internal successors, (155115), 37393 states have internal predecessors, (155115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37394 states to 37394 states and 155115 transitions. [2021-05-03 16:24:34,662 INFO L78 Accepts]: Start accepts. Automaton has 37394 states and 155115 transitions. Word has length 39 [2021-05-03 16:24:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:34,662 INFO L480 AbstractCegarLoop]: Abstraction has 37394 states and 155115 transitions. [2021-05-03 16:24:34,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 37394 states and 155115 transitions. [2021-05-03 16:24:34,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:34,754 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:34,754 INFO L551 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] [2021-05-03 16:24:34,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:34,958 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:34,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:34,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2053917695, now seen corresponding path program 42 times [2021-05-03 16:24:34,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:34,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078279227] [2021-05-03 16:24:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:35,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078279227] [2021-05-03 16:24:35,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667114713] [2021-05-03 16:24:35,531 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:35,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:24:35,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:35,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 16:24:35,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:35,917 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:24:35,917 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 21 [2021-05-03 16:24:35,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:35,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:35,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:35,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-05-03 16:24:35,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:24:35,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:35,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:35,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:35,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:24:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:36,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:36,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:24:36,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370271004] [2021-05-03 16:24:36,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:24:36,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:36,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:24:36,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:24:36,067 INFO L87 Difference]: Start difference. First operand 37394 states and 155115 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:39,396 INFO L93 Difference]: Finished difference Result 79507 states and 323183 transitions. [2021-05-03 16:24:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:24:39,398 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:39,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:39,683 INFO L225 Difference]: With dead ends: 79507 [2021-05-03 16:24:39,683 INFO L226 Difference]: Without dead ends: 79283 [2021-05-03 16:24:39,684 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 2083.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:24:39,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79283 states. [2021-05-03 16:24:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79283 to 37270. [2021-05-03 16:24:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37270 states, 37269 states have (on average 4.150178432477394) internal successors, (154673), 37269 states have internal predecessors, (154673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37270 states to 37270 states and 154673 transitions. [2021-05-03 16:24:41,131 INFO L78 Accepts]: Start accepts. Automaton has 37270 states and 154673 transitions. Word has length 39 [2021-05-03 16:24:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:41,131 INFO L480 AbstractCegarLoop]: Abstraction has 37270 states and 154673 transitions. [2021-05-03 16:24:41,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 37270 states and 154673 transitions. [2021-05-03 16:24:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:41,473 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:41,473 INFO L551 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] [2021-05-03 16:24:41,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:41,689 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:41,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:41,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1820000131, now seen corresponding path program 43 times [2021-05-03 16:24:41,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:41,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517204629] [2021-05-03 16:24:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:42,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517204629] [2021-05-03 16:24:42,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655074432] [2021-05-03 16:24:42,235 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:42,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:24:42,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:42,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:24:42,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:42,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:42,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:42,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:24:42,677 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:24:42,677 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 39 treesize of output 27 [2021-05-03 16:24:42,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:42,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:42,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:42,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:24:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:42,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:42,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:24:42,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63429658] [2021-05-03 16:24:42,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:24:42,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:24:42,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:24:42,750 INFO L87 Difference]: Start difference. First operand 37270 states and 154673 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:45,597 INFO L93 Difference]: Finished difference Result 81312 states and 331062 transitions. [2021-05-03 16:24:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:24:45,598 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:45,915 INFO L225 Difference]: With dead ends: 81312 [2021-05-03 16:24:45,915 INFO L226 Difference]: Without dead ends: 81160 [2021-05-03 16:24:45,915 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1836.8ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:24:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81160 states. [2021-05-03 16:24:47,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81160 to 37320. [2021-05-03 16:24:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37320 states, 37319 states have (on average 4.150620327447145) internal successors, (154897), 37319 states have internal predecessors, (154897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37320 states to 37320 states and 154897 transitions. [2021-05-03 16:24:47,376 INFO L78 Accepts]: Start accepts. Automaton has 37320 states and 154897 transitions. Word has length 39 [2021-05-03 16:24:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:47,376 INFO L480 AbstractCegarLoop]: Abstraction has 37320 states and 154897 transitions. [2021-05-03 16:24:47,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 37320 states and 154897 transitions. [2021-05-03 16:24:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:47,467 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:47,467 INFO L551 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] [2021-05-03 16:24:47,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:47,668 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:47,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:47,668 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920877, now seen corresponding path program 44 times [2021-05-03 16:24:47,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:47,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157029792] [2021-05-03 16:24:47,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:48,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157029792] [2021-05-03 16:24:48,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168516621] [2021-05-03 16:24:48,212 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:48,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:24:48,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:24:48,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:48,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:24:48,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:48,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:48,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:48,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:24:48,673 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:24:48,673 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 39 treesize of output 27 [2021-05-03 16:24:48,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:48,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:48,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:48,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:24:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:48,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:48,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:24:48,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748258212] [2021-05-03 16:24:48,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:24:48,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:48,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:24:48,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:24:48,729 INFO L87 Difference]: Start difference. First operand 37320 states and 154897 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:50,132 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-03 16:24:51,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:51,497 INFO L93 Difference]: Finished difference Result 68093 states and 278664 transitions. [2021-05-03 16:24:51,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:24:51,500 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:51,767 INFO L225 Difference]: With dead ends: 68093 [2021-05-03 16:24:51,767 INFO L226 Difference]: Without dead ends: 68003 [2021-05-03 16:24:51,767 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1761.7ms TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:24:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68003 states. [2021-05-03 16:24:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68003 to 37072. [2021-05-03 16:24:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37072 states, 37071 states have (on average 4.1516279571632815) internal successors, (153905), 37071 states have internal predecessors, (153905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:53,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37072 states to 37072 states and 153905 transitions. [2021-05-03 16:24:53,164 INFO L78 Accepts]: Start accepts. Automaton has 37072 states and 153905 transitions. Word has length 39 [2021-05-03 16:24:53,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:24:53,164 INFO L480 AbstractCegarLoop]: Abstraction has 37072 states and 153905 transitions. [2021-05-03 16:24:53,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:53,164 INFO L276 IsEmpty]: Start isEmpty. Operand 37072 states and 153905 transitions. [2021-05-03 16:24:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:24:53,264 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:24:53,264 INFO L551 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] [2021-05-03 16:24:53,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:53,469 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:24:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:24:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1034892989, now seen corresponding path program 45 times [2021-05-03 16:24:53,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:24:53,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780682908] [2021-05-03 16:24:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:24:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:24:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:53,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780682908] [2021-05-03 16:24:53,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074778549] [2021-05-03 16:24:53,985 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:24:54,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:24:54,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:24:54,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 16:24:54,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:24:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:24:54,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:54,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-05-03 16:24:54,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:54,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:54,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:54,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:91 [2021-05-03 16:24:54,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:24:54,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:24:54,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:54,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:24:54,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-05-03 16:24:54,955 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-03 16:24:54,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:54,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:24:54,958 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:24:54,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:24:54,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:24:54,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-05-03 16:24:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:24:55,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:24:55,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-05-03 16:24:55,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730704342] [2021-05-03 16:24:55,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 16:24:55,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:24:55,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 16:24:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:24:55,072 INFO L87 Difference]: Start difference. First operand 37072 states and 153905 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:24:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:24:59,385 INFO L93 Difference]: Finished difference Result 68200 states and 279286 transitions. [2021-05-03 16:24:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:24:59,386 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:24:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:24:59,630 INFO L225 Difference]: With dead ends: 68200 [2021-05-03 16:24:59,630 INFO L226 Difference]: Without dead ends: 68145 [2021-05-03 16:24:59,630 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 2910.8ms TimeCoverageRelationStatistics Valid=523, Invalid=3017, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 16:24:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68145 states. [2021-05-03 16:25:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68145 to 37651. [2021-05-03 16:25:00,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37651 states, 37650 states have (on average 4.149349269588313) internal successors, (156223), 37650 states have internal predecessors, (156223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37651 states to 37651 states and 156223 transitions. [2021-05-03 16:25:00,969 INFO L78 Accepts]: Start accepts. Automaton has 37651 states and 156223 transitions. Word has length 39 [2021-05-03 16:25:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:00,969 INFO L480 AbstractCegarLoop]: Abstraction has 37651 states and 156223 transitions. [2021-05-03 16:25:00,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 37651 states and 156223 transitions. [2021-05-03 16:25:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:01,039 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:01,039 INFO L551 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] [2021-05-03 16:25:01,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:01,239 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:01,240 INFO L82 PathProgramCache]: Analyzing trace with hash 899626485, now seen corresponding path program 46 times [2021-05-03 16:25:01,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:01,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48231672] [2021-05-03 16:25:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:01,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48231672] [2021-05-03 16:25:01,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041269550] [2021-05-03 16:25:01,847 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:01,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:25:01,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:01,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:25:01,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:02,177 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:25:02,178 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 28 treesize of output 16 [2021-05-03 16:25:02,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:02,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:02,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:02,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-05-03 16:25:02,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:25:02,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:02,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:02,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:02,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:25:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:02,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:02,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:25:02,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384797818] [2021-05-03 16:25:02,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:25:02,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:02,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:25:02,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:25:02,437 INFO L87 Difference]: Start difference. First operand 37651 states and 156223 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:05,809 INFO L93 Difference]: Finished difference Result 65825 states and 269786 transitions. [2021-05-03 16:25:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:25:05,810 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:25:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:06,091 INFO L225 Difference]: With dead ends: 65825 [2021-05-03 16:25:06,091 INFO L226 Difference]: Without dead ends: 65609 [2021-05-03 16:25:06,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2319.9ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:25:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65609 states. [2021-05-03 16:25:07,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65609 to 37607. [2021-05-03 16:25:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37607 states, 37606 states have (on average 4.150002659150136) internal successors, (156065), 37606 states have internal predecessors, (156065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37607 states to 37607 states and 156065 transitions. [2021-05-03 16:25:07,543 INFO L78 Accepts]: Start accepts. Automaton has 37607 states and 156065 transitions. Word has length 39 [2021-05-03 16:25:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:07,543 INFO L480 AbstractCegarLoop]: Abstraction has 37607 states and 156065 transitions. [2021-05-03 16:25:07,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 37607 states and 156065 transitions. [2021-05-03 16:25:07,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:07,645 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:07,645 INFO L551 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] [2021-05-03 16:25:07,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-03 16:25:07,861 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:07,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:07,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1502735341, now seen corresponding path program 47 times [2021-05-03 16:25:07,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:07,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670372421] [2021-05-03 16:25:07,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:08,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670372421] [2021-05-03 16:25:08,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73017110] [2021-05-03 16:25:08,645 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:08,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:25:08,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:08,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:25:08,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:09,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:09,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 46 [2021-05-03 16:25:09,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:09,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:09,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:25:09,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:44 [2021-05-03 16:25:09,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:09,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:09,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:09,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:09,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 16:25:09,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:09,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:09,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:25:09,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:27 [2021-05-03 16:25:10,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:10,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:10,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:10,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:10,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-05-03 16:25:10,118 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:25:10,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:10,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:25:10,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 16:25:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:10,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:10,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:25:10,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143308633] [2021-05-03 16:25:10,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:25:10,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:10,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:25:10,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:25:10,271 INFO L87 Difference]: Start difference. First operand 37607 states and 156065 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:12,261 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-05-03 16:25:18,180 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-05-03 16:25:19,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:19,442 INFO L93 Difference]: Finished difference Result 70286 states and 287534 transitions. [2021-05-03 16:25:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 16:25:19,443 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:25:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:19,720 INFO L225 Difference]: With dead ends: 70286 [2021-05-03 16:25:19,721 INFO L226 Difference]: Without dead ends: 70065 [2021-05-03 16:25:19,721 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 5741.5ms TimeCoverageRelationStatistics Valid=732, Invalid=4238, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 16:25:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70065 states. [2021-05-03 16:25:20,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70065 to 37939. [2021-05-03 16:25:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37939 states, 37938 states have (on average 4.146370393800411) internal successors, (157305), 37938 states have internal predecessors, (157305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37939 states to 37939 states and 157305 transitions. [2021-05-03 16:25:21,129 INFO L78 Accepts]: Start accepts. Automaton has 37939 states and 157305 transitions. Word has length 39 [2021-05-03 16:25:21,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:21,129 INFO L480 AbstractCegarLoop]: Abstraction has 37939 states and 157305 transitions. [2021-05-03 16:25:21,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand 37939 states and 157305 transitions. [2021-05-03 16:25:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:21,224 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:21,224 INFO L551 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] [2021-05-03 16:25:21,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:21,425 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:21,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1438695687, now seen corresponding path program 48 times [2021-05-03 16:25:21,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:21,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821504885] [2021-05-03 16:25:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:22,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821504885] [2021-05-03 16:25:22,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759020058] [2021-05-03 16:25:22,029 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:22,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:25:22,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:22,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:25:22,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:22,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:22,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-05-03 16:25:22,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:22,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:22,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:25:22,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:40 [2021-05-03 16:25:23,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:23,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:25:23,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:25:23,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:23,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:23,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:23,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:12 [2021-05-03 16:25:23,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:23,225 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 13 treesize of output 18 [2021-05-03 16:25:23,230 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:25:23,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:23,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:23,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:14 [2021-05-03 16:25:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:23,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:23,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-05-03 16:25:23,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246809286] [2021-05-03 16:25:23,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 16:25:23,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 16:25:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:25:23,414 INFO L87 Difference]: Start difference. First operand 37939 states and 157305 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:23,682 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-05-03 16:25:28,665 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-05-03 16:25:29,353 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-05-03 16:25:31,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:31,344 INFO L93 Difference]: Finished difference Result 81507 states and 329555 transitions. [2021-05-03 16:25:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:25:31,346 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:25:31,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:31,681 INFO L225 Difference]: With dead ends: 81507 [2021-05-03 16:25:31,681 INFO L226 Difference]: Without dead ends: 81409 [2021-05-03 16:25:31,682 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 4940.9ms TimeCoverageRelationStatistics Valid=774, Invalid=3782, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 16:25:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81409 states. [2021-05-03 16:25:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81409 to 38068. [2021-05-03 16:25:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38068 states, 38067 states have (on average 4.1451388341608215) internal successors, (157793), 38067 states have internal predecessors, (157793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38068 states to 38068 states and 157793 transitions. [2021-05-03 16:25:33,248 INFO L78 Accepts]: Start accepts. Automaton has 38068 states and 157793 transitions. Word has length 39 [2021-05-03 16:25:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:33,248 INFO L480 AbstractCegarLoop]: Abstraction has 38068 states and 157793 transitions. [2021-05-03 16:25:33,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 38068 states and 157793 transitions. [2021-05-03 16:25:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:33,348 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:33,348 INFO L551 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] [2021-05-03 16:25:33,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-05-03 16:25:33,561 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1311781951, now seen corresponding path program 49 times [2021-05-03 16:25:33,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:33,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707840707] [2021-05-03 16:25:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:34,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707840707] [2021-05-03 16:25:34,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442982369] [2021-05-03 16:25:34,365 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:34,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:25:34,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:34,757 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:25:34,757 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 28 treesize of output 16 [2021-05-03 16:25:34,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:34,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:34,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:34,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-05-03 16:25:35,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:25:35,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:35,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:35,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:35,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:25:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:35,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:35,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:25:35,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949569361] [2021-05-03 16:25:35,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:25:35,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:35,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:25:35,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:25:35,117 INFO L87 Difference]: Start difference. First operand 38068 states and 157793 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:36,560 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 16:25:36,894 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-03 16:25:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:39,056 INFO L93 Difference]: Finished difference Result 80010 states and 325453 transitions. [2021-05-03 16:25:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:25:39,059 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:25:39,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:39,394 INFO L225 Difference]: With dead ends: 80010 [2021-05-03 16:25:39,395 INFO L226 Difference]: Without dead ends: 79826 [2021-05-03 16:25:39,395 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 3106.1ms TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:25:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79826 states. [2021-05-03 16:25:41,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79826 to 37815. [2021-05-03 16:25:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37815 states, 37814 states have (on average 4.1485693129528745) internal successors, (156874), 37814 states have internal predecessors, (156874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37815 states to 37815 states and 156874 transitions. [2021-05-03 16:25:41,266 INFO L78 Accepts]: Start accepts. Automaton has 37815 states and 156874 transitions. Word has length 39 [2021-05-03 16:25:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:41,267 INFO L480 AbstractCegarLoop]: Abstraction has 37815 states and 156874 transitions. [2021-05-03 16:25:41,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:41,267 INFO L276 IsEmpty]: Start isEmpty. Operand 37815 states and 156874 transitions. [2021-05-03 16:25:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:41,364 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:41,364 INFO L551 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] [2021-05-03 16:25:41,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-03 16:25:41,565 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:41,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:41,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1564579539, now seen corresponding path program 50 times [2021-05-03 16:25:41,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:41,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204912624] [2021-05-03 16:25:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:42,015 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:25:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:42,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204912624] [2021-05-03 16:25:42,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793729597] [2021-05-03 16:25:42,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:42,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:25:42,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:25:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:42,976 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:25:42,976 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 28 treesize of output 16 [2021-05-03 16:25:42,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:42,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:42,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:42,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-05-03 16:25:43,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:25:43,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:43,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:43,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:43,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-05-03 16:25:43,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:43,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:25:43,232 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:25:43,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:43,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:25:43,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-05-03 16:25:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:43,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:43,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:25:43,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203204598] [2021-05-03 16:25:43,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:25:43,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:43,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:25:43,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:25:43,346 INFO L87 Difference]: Start difference. First operand 37815 states and 156874 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:44,662 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:25:45,090 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 16:25:46,054 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-05-03 16:25:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:25:48,621 INFO L93 Difference]: Finished difference Result 81479 states and 335542 transitions. [2021-05-03 16:25:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:25:48,622 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:25:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:25:48,967 INFO L225 Difference]: With dead ends: 81479 [2021-05-03 16:25:48,967 INFO L226 Difference]: Without dead ends: 81424 [2021-05-03 16:25:48,967 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 3195.4ms TimeCoverageRelationStatistics Valid=387, Invalid=2163, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:25:49,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81424 states. [2021-05-03 16:25:50,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81424 to 38089. [2021-05-03 16:25:50,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38089 states, 38088 states have (on average 4.147500525099769) internal successors, (157970), 38088 states have internal predecessors, (157970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38089 states to 38089 states and 157970 transitions. [2021-05-03 16:25:50,572 INFO L78 Accepts]: Start accepts. Automaton has 38089 states and 157970 transitions. Word has length 39 [2021-05-03 16:25:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:25:50,572 INFO L480 AbstractCegarLoop]: Abstraction has 38089 states and 157970 transitions. [2021-05-03 16:25:50,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:25:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 38089 states and 157970 transitions. [2021-05-03 16:25:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:25:50,673 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:25:50,673 INFO L551 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] [2021-05-03 16:25:50,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-05-03 16:25:50,877 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:25:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:25:50,877 INFO L82 PathProgramCache]: Analyzing trace with hash 369939935, now seen corresponding path program 51 times [2021-05-03 16:25:50,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:25:50,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19196557] [2021-05-03 16:25:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:25:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:25:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:51,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19196557] [2021-05-03 16:25:51,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368233815] [2021-05-03 16:25:51,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:25:51,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:25:51,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:25:51,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:25:51,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:25:52,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:52,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:52,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-05-03 16:25:52,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:52,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:52,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:25:52,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:55 [2021-05-03 16:25:52,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:52,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-05-03 16:25:52,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:52,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:25:52,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:25:52,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:108 [2021-05-03 16:25:53,101 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-05-03 16:25:53,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:53,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-05-03 16:25:53,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:53,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:25:53,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-05-03 16:25:53,176 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:25:53,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:25:53,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:53,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:25:53,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:25:53,247 INFO L628 ElimStorePlain]: treesize reduction 115, result has 11.5 percent of original size [2021-05-03 16:25:53,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:25:53,249 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:207, output treesize:13 [2021-05-03 16:25:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:25:53,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:25:53,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-05-03 16:25:53,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092327080] [2021-05-03 16:25:53,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 16:25:53,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:25:53,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 16:25:53,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:25:53,444 INFO L87 Difference]: Start difference. First operand 38089 states and 157970 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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) [2021-05-03 16:25:53,887 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2021-05-03 16:25:59,276 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-05-03 16:25:59,682 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-05-03 16:26:00,901 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-05-03 16:26:01,923 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 16:26:02,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:02,514 INFO L93 Difference]: Finished difference Result 63464 states and 258675 transitions. [2021-05-03 16:26:02,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 16:26:02,516 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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 39 [2021-05-03 16:26:02,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:02,778 INFO L225 Difference]: With dead ends: 63464 [2021-05-03 16:26:02,778 INFO L226 Difference]: Without dead ends: 63308 [2021-05-03 16:26:02,779 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 6090.4ms TimeCoverageRelationStatistics Valid=739, Invalid=4231, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 16:26:02,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63308 states. [2021-05-03 16:26:03,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63308 to 38367. [2021-05-03 16:26:04,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38367 states, 38366 states have (on average 4.14325183756451) internal successors, (158960), 38366 states have internal predecessors, (158960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38367 states to 38367 states and 158960 transitions. [2021-05-03 16:26:04,203 INFO L78 Accepts]: Start accepts. Automaton has 38367 states and 158960 transitions. Word has length 39 [2021-05-03 16:26:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:26:04,203 INFO L480 AbstractCegarLoop]: Abstraction has 38367 states and 158960 transitions. [2021-05-03 16:26:04,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 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) [2021-05-03 16:26:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 38367 states and 158960 transitions. [2021-05-03 16:26:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:26:04,306 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:26:04,306 INFO L551 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] [2021-05-03 16:26:04,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:04,507 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:26:04,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:26:04,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1311896975, now seen corresponding path program 52 times [2021-05-03 16:26:04,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:26:04,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719026114] [2021-05-03 16:26:04,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:26:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:05,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719026114] [2021-05-03 16:26:05,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447941130] [2021-05-03 16:26:05,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:05,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:26:05,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:26:05,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:26:05,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:26:05,794 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:26:05,794 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 28 treesize of output 16 [2021-05-03 16:26:05,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:05,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:05,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:05,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-05-03 16:26:05,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:26:05,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:05,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:05,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:05,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:26:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:06,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:06,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:26:06,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488950790] [2021-05-03 16:26:06,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:26:06,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:06,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:26:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:26:06,106 INFO L87 Difference]: Start difference. First operand 38367 states and 158960 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:12,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:12,046 INFO L93 Difference]: Finished difference Result 80709 states and 328280 transitions. [2021-05-03 16:26:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 16:26:12,048 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:26:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:12,381 INFO L225 Difference]: With dead ends: 80709 [2021-05-03 16:26:12,381 INFO L226 Difference]: Without dead ends: 80493 [2021-05-03 16:26:12,381 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 3514.2ms TimeCoverageRelationStatistics Valid=437, Invalid=2215, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:26:12,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80493 states. [2021-05-03 16:26:13,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80493 to 38109. [2021-05-03 16:26:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38109 states, 38108 states have (on average 4.145533746195024) internal successors, (157978), 38108 states have internal predecessors, (157978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38109 states to 38109 states and 157978 transitions. [2021-05-03 16:26:14,120 INFO L78 Accepts]: Start accepts. Automaton has 38109 states and 157978 transitions. Word has length 39 [2021-05-03 16:26:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:26:14,121 INFO L480 AbstractCegarLoop]: Abstraction has 38109 states and 157978 transitions. [2021-05-03 16:26:14,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 38109 states and 157978 transitions. [2021-05-03 16:26:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:26:14,222 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:26:14,222 INFO L551 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] [2021-05-03 16:26:14,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:14,422 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:26:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:26:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1573156905, now seen corresponding path program 53 times [2021-05-03 16:26:14,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:26:14,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893434293] [2021-05-03 16:26:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:26:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:14,859 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-05-03 16:26:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:15,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893434293] [2021-05-03 16:26:15,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136509049] [2021-05-03 16:26:15,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:15,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:26:15,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:26:15,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:26:15,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:26:15,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 16:26:15,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:15,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:15,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:15,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-05-03 16:26:15,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:15,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:15,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:15,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:15,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2021-05-03 16:26:15,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:26:15,937 INFO L628 ElimStorePlain]: treesize reduction 41, result has 44.6 percent of original size [2021-05-03 16:26:15,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:15,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:34 [2021-05-03 16:26:16,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:26:16,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-05-03 16:26:16,242 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:26:16,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:16,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:16,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:3 [2021-05-03 16:26:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:16,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:16,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:26:16,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406378910] [2021-05-03 16:26:16,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:26:16,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:16,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:26:16,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:26:16,314 INFO L87 Difference]: Start difference. First operand 38109 states and 157978 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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) [2021-05-03 16:26:17,867 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-05-03 16:26:18,935 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-05-03 16:26:19,713 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 16:26:19,919 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-05-03 16:26:20,268 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-05-03 16:26:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:23,832 INFO L93 Difference]: Finished difference Result 67305 states and 274805 transitions. [2021-05-03 16:26:23,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:26:23,834 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 39 [2021-05-03 16:26:23,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:24,102 INFO L225 Difference]: With dead ends: 67305 [2021-05-03 16:26:24,102 INFO L226 Difference]: Without dead ends: 67250 [2021-05-03 16:26:24,102 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 4519.8ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:26:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67250 states. [2021-05-03 16:26:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67250 to 38670. [2021-05-03 16:26:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38670 states, 38669 states have (on average 4.149861646279966) internal successors, (160471), 38669 states have internal predecessors, (160471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:25,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38670 states to 38670 states and 160471 transitions. [2021-05-03 16:26:25,604 INFO L78 Accepts]: Start accepts. Automaton has 38670 states and 160471 transitions. Word has length 39 [2021-05-03 16:26:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:26:25,605 INFO L480 AbstractCegarLoop]: Abstraction has 38670 states and 160471 transitions. [2021-05-03 16:26:25,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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) [2021-05-03 16:26:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 38670 states and 160471 transitions. [2021-05-03 16:26:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:26:25,715 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:26:25,715 INFO L551 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] [2021-05-03 16:26:25,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-03 16:26:25,915 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:26:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:26:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1254976421, now seen corresponding path program 54 times [2021-05-03 16:26:25,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:26:25,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719552485] [2021-05-03 16:26:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:26:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:26,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719552485] [2021-05-03 16:26:26,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292303099] [2021-05-03 16:26:26,686 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:26,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:26:26,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:26:26,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 16:26:26,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:26:27,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:26:27,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:27,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:27,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:26:27,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:41 [2021-05-03 16:26:27,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:27,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:27,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:26:27,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:26:27,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:27,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:27,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:27,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:12 [2021-05-03 16:26:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:27,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:27,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:26:27,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157831885] [2021-05-03 16:26:27,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:26:27,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:27,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:26:27,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:26:27,851 INFO L87 Difference]: Start difference. First operand 38670 states and 160471 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:28,156 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-05-03 16:26:28,356 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-05-03 16:26:29,563 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:26:30,985 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-05-03 16:26:31,681 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-05-03 16:26:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:33,586 INFO L93 Difference]: Finished difference Result 93986 states and 383473 transitions. [2021-05-03 16:26:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:26:33,589 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:26:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:34,301 INFO L225 Difference]: With dead ends: 93986 [2021-05-03 16:26:34,302 INFO L226 Difference]: Without dead ends: 93931 [2021-05-03 16:26:34,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 3935.6ms TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:26:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93931 states. [2021-05-03 16:26:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93931 to 38539. [2021-05-03 16:26:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38539 states, 38538 states have (on average 4.146868026363589) internal successors, (159812), 38538 states have internal predecessors, (159812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38539 states to 38539 states and 159812 transitions. [2021-05-03 16:26:36,106 INFO L78 Accepts]: Start accepts. Automaton has 38539 states and 159812 transitions. Word has length 39 [2021-05-03 16:26:36,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:26:36,106 INFO L480 AbstractCegarLoop]: Abstraction has 38539 states and 159812 transitions. [2021-05-03 16:26:36,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:36,107 INFO L276 IsEmpty]: Start isEmpty. Operand 38539 states and 159812 transitions. [2021-05-03 16:26:36,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:26:36,217 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:26:36,218 INFO L551 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] [2021-05-03 16:26:36,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:36,419 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:26:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:26:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash 935568875, now seen corresponding path program 55 times [2021-05-03 16:26:36,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:26:36,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684999484] [2021-05-03 16:26:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:26:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:37,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684999484] [2021-05-03 16:26:37,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832645873] [2021-05-03 16:26:37,239 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:37,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:26:37,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:26:37,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:26:37,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:37,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:37,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:37,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:26:38,015 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:26:38,015 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 39 treesize of output 27 [2021-05-03 16:26:38,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:38,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:38,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:38,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:26:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:38,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:38,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 16:26:38,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927293123] [2021-05-03 16:26:38,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:26:38,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:38,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:26:38,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:26:38,129 INFO L87 Difference]: Start difference. First operand 38539 states and 159812 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:42,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:42,852 INFO L93 Difference]: Finished difference Result 88125 states and 363578 transitions. [2021-05-03 16:26:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:26:42,854 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:26:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:43,227 INFO L225 Difference]: With dead ends: 88125 [2021-05-03 16:26:43,227 INFO L226 Difference]: Without dead ends: 88070 [2021-05-03 16:26:43,227 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2445.9ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:26:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88070 states. [2021-05-03 16:26:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88070 to 39031. [2021-05-03 16:26:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39031 states, 39030 states have (on average 4.149321035101204) internal successors, (161948), 39030 states have internal predecessors, (161948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39031 states to 39031 states and 161948 transitions. [2021-05-03 16:26:45,022 INFO L78 Accepts]: Start accepts. Automaton has 39031 states and 161948 transitions. Word has length 39 [2021-05-03 16:26:45,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:26:45,022 INFO L480 AbstractCegarLoop]: Abstraction has 39031 states and 161948 transitions. [2021-05-03 16:26:45,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:45,022 INFO L276 IsEmpty]: Start isEmpty. Operand 39031 states and 161948 transitions. [2021-05-03 16:26:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:26:45,129 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:26:45,129 INFO L551 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] [2021-05-03 16:26:45,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-05-03 16:26:45,329 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:26:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:26:45,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1940405397, now seen corresponding path program 56 times [2021-05-03 16:26:45,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:26:45,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907752324] [2021-05-03 16:26:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:26:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:46,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907752324] [2021-05-03 16:26:46,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985156715] [2021-05-03 16:26:46,081 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:46,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:26:46,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:26:46,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:26:46,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:26:46,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:26:46,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:46,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:46,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:46,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:26:46,880 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:26:46,880 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 39 treesize of output 27 [2021-05-03 16:26:46,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:46,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:46,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:46,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:26:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:47,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:47,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 16:26:47,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776650039] [2021-05-03 16:26:47,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:26:47,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:47,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:26:47,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:26:47,303 INFO L87 Difference]: Start difference. First operand 39031 states and 161948 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:26:52,178 INFO L93 Difference]: Finished difference Result 85381 states and 351989 transitions. [2021-05-03 16:26:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:26:52,181 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:26:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:26:52,856 INFO L225 Difference]: With dead ends: 85381 [2021-05-03 16:26:52,856 INFO L226 Difference]: Without dead ends: 85326 [2021-05-03 16:26:52,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2847.3ms TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:26:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85326 states. [2021-05-03 16:26:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85326 to 38439. [2021-05-03 16:26:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38439 states, 38438 states have (on average 4.146209480201883) internal successors, (159372), 38438 states have internal predecessors, (159372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38439 states to 38439 states and 159372 transitions. [2021-05-03 16:26:54,608 INFO L78 Accepts]: Start accepts. Automaton has 38439 states and 159372 transitions. Word has length 39 [2021-05-03 16:26:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:26:54,608 INFO L480 AbstractCegarLoop]: Abstraction has 38439 states and 159372 transitions. [2021-05-03 16:26:54,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:26:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 38439 states and 159372 transitions. [2021-05-03 16:26:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:26:54,703 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:26:54,703 INFO L551 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] [2021-05-03 16:26:54,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-03 16:26:54,903 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:26:54,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:26:54,904 INFO L82 PathProgramCache]: Analyzing trace with hash -463391085, now seen corresponding path program 57 times [2021-05-03 16:26:54,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:26:54,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853964956] [2021-05-03 16:26:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:26:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:26:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:55,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853964956] [2021-05-03 16:26:55,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643700371] [2021-05-03 16:26:55,834 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:26:55,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:26:55,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:26:55,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-03 16:26:55,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:26:56,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:56,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:56,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-05-03 16:26:56,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:56,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:56,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:56,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:112 [2021-05-03 16:26:57,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:57,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-05-03 16:26:57,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:57,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:26:57,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:26:57,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:54 [2021-05-03 16:26:57,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:26:57,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-05-03 16:26:57,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:57,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:26:57,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:26:57,349 INFO L628 ElimStorePlain]: treesize reduction 25, result has 57.6 percent of original size [2021-05-03 16:26:57,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:26:57,351 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:97, output treesize:34 [2021-05-03 16:26:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:26:57,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:26:57,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-05-03 16:26:57,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447534297] [2021-05-03 16:26:57,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 16:26:57,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:26:57,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 16:26:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:26:57,785 INFO L87 Difference]: Start difference. First operand 38439 states and 159372 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 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) [2021-05-03 16:26:58,763 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-03 16:26:59,963 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-05-03 16:27:00,729 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:27:01,386 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-05-03 16:27:02,249 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-05-03 16:27:03,465 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-05-03 16:27:03,749 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-05-03 16:27:04,152 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-05-03 16:27:04,569 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 16:27:04,786 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-05-03 16:27:05,113 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-03 16:27:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:27:05,995 INFO L93 Difference]: Finished difference Result 63331 states and 257800 transitions. [2021-05-03 16:27:05,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 16:27:05,997 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 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 39 [2021-05-03 16:27:05,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:27:06,238 INFO L225 Difference]: With dead ends: 63331 [2021-05-03 16:27:06,238 INFO L226 Difference]: Without dead ends: 63183 [2021-05-03 16:27:06,239 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 6257.2ms TimeCoverageRelationStatistics Valid=624, Invalid=3036, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 16:27:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63183 states. [2021-05-03 16:27:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63183 to 38679. [2021-05-03 16:27:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38679 states, 38678 states have (on average 4.143492424634159) internal successors, (160262), 38678 states have internal predecessors, (160262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38679 states to 38679 states and 160262 transitions. [2021-05-03 16:27:07,539 INFO L78 Accepts]: Start accepts. Automaton has 38679 states and 160262 transitions. Word has length 39 [2021-05-03 16:27:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:27:07,539 INFO L480 AbstractCegarLoop]: Abstraction has 38679 states and 160262 transitions. [2021-05-03 16:27:07,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 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) [2021-05-03 16:27:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 38679 states and 160262 transitions. [2021-05-03 16:27:07,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:27:07,639 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:27:07,639 INFO L551 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] [2021-05-03 16:27:07,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-03 16:27:07,840 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:27:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:27:07,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2145227995, now seen corresponding path program 58 times [2021-05-03 16:27:07,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:27:07,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543595469] [2021-05-03 16:27:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:27:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:08,718 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:27:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:09,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543595469] [2021-05-03 16:27:09,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489291128] [2021-05-03 16:27:09,025 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:09,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:27:09,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:27:09,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:27:09,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:27:09,654 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:27:09,654 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 21 [2021-05-03 16:27:09,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:09,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:09,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:09,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-05-03 16:27:09,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:27:09,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:09,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:09,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:09,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:27:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:09,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:27:09,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:27:09,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480455650] [2021-05-03 16:27:09,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:27:09,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:27:09,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:27:09,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:27:09,904 INFO L87 Difference]: Start difference. First operand 38679 states and 160262 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:10,823 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-03 16:27:11,368 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-03 16:27:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:27:16,070 INFO L93 Difference]: Finished difference Result 81718 states and 332147 transitions. [2021-05-03 16:27:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:27:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:27:16,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:27:16,379 INFO L225 Difference]: With dead ends: 81718 [2021-05-03 16:27:16,379 INFO L226 Difference]: Without dead ends: 81494 [2021-05-03 16:27:16,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 3552.2ms TimeCoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 16:27:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81494 states. [2021-05-03 16:27:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81494 to 38631. [2021-05-03 16:27:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38631 states, 38630 states have (on average 4.143981361636034) internal successors, (160082), 38630 states have internal predecessors, (160082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38631 states to 38631 states and 160082 transitions. [2021-05-03 16:27:17,869 INFO L78 Accepts]: Start accepts. Automaton has 38631 states and 160082 transitions. Word has length 39 [2021-05-03 16:27:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:27:17,870 INFO L480 AbstractCegarLoop]: Abstraction has 38631 states and 160082 transitions. [2021-05-03 16:27:17,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 38631 states and 160082 transitions. [2021-05-03 16:27:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:27:17,970 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:27:17,971 INFO L551 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] [2021-05-03 16:27:18,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:18,171 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:27:18,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:27:18,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1553694967, now seen corresponding path program 59 times [2021-05-03 16:27:18,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:27:18,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283337254] [2021-05-03 16:27:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:27:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:18,896 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:27:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:19,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283337254] [2021-05-03 16:27:19,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489094569] [2021-05-03 16:27:19,134 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:19,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:27:19,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:27:19,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:27:19,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:27:20,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:20,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:20,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-05-03 16:27:20,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:20,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:20,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:27:20,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:98 [2021-05-03 16:27:20,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:20,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:20,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:20,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:20,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-05-03 16:27:20,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:27:20,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:20,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:27:20,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:27:20,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:27:20,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:20,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:20,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 16:27:20,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:20,954 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-05-03 16:27:20,955 INFO L628 ElimStorePlain]: treesize reduction 47, result has 66.7 percent of original size [2021-05-03 16:27:20,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-05-03 16:27:20,975 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:156, output treesize:76 [2021-05-03 16:27:21,337 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 16:27:21,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:21,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:21,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:27:21,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:21,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-05-03 16:27:21,588 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:27:21,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:21,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:27:21,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 16:27:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:21,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:27:21,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:27:21,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398607848] [2021-05-03 16:27:21,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:27:21,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:27:21,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:27:21,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:27:21,785 INFO L87 Difference]: Start difference. First operand 38631 states and 160082 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:23,157 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-05-03 16:27:23,941 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-05-03 16:27:24,584 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2021-05-03 16:27:25,197 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-05-03 16:27:25,470 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2021-05-03 16:27:26,096 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-05-03 16:27:26,675 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-05-03 16:27:26,939 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 16:27:27,335 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-05-03 16:27:27,739 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-05-03 16:27:28,326 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 16:27:28,877 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-05-03 16:27:29,441 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-05-03 16:27:29,831 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-05-03 16:27:30,268 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-05-03 16:27:31,962 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-05-03 16:27:32,439 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-05-03 16:27:32,794 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-05-03 16:27:33,110 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-05-03 16:27:33,538 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-03 16:27:33,963 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-05-03 16:27:34,481 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-05-03 16:27:34,729 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-05-03 16:27:34,961 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-03 16:27:37,614 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-03 16:27:38,737 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-05-03 16:27:41,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:27:41,743 INFO L93 Difference]: Finished difference Result 93198 states and 377973 transitions. [2021-05-03 16:27:41,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-03 16:27:41,746 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:27:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:27:42,106 INFO L225 Difference]: With dead ends: 93198 [2021-05-03 16:27:42,107 INFO L226 Difference]: Without dead ends: 92715 [2021-05-03 16:27:42,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2767 ImplicationChecksByTransitivity, 12511.1ms TimeCoverageRelationStatistics Valid=1346, Invalid=7774, Unknown=0, NotChecked=0, Total=9120 [2021-05-03 16:27:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92715 states. [2021-05-03 16:27:43,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92715 to 38799. [2021-05-03 16:27:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38799 states, 38798 states have (on average 4.143048610753132) internal successors, (160742), 38798 states have internal predecessors, (160742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:43,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38799 states to 38799 states and 160742 transitions. [2021-05-03 16:27:43,727 INFO L78 Accepts]: Start accepts. Automaton has 38799 states and 160742 transitions. Word has length 39 [2021-05-03 16:27:43,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:27:43,727 INFO L480 AbstractCegarLoop]: Abstraction has 38799 states and 160742 transitions. [2021-05-03 16:27:43,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:43,728 INFO L276 IsEmpty]: Start isEmpty. Operand 38799 states and 160742 transitions. [2021-05-03 16:27:43,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:27:43,828 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:27:43,828 INFO L551 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] [2021-05-03 16:27:44,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:44,028 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:27:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:27:44,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1757615713, now seen corresponding path program 60 times [2021-05-03 16:27:44,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:27:44,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697435336] [2021-05-03 16:27:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:27:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:44,782 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:27:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:45,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697435336] [2021-05-03 16:27:45,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550089458] [2021-05-03 16:27:45,061 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:45,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:27:45,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:27:45,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 16:27:45,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:27:45,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 16:27:45,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:45,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:45,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:45,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:43 [2021-05-03 16:27:45,992 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:27:45,993 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 41 treesize of output 29 [2021-05-03 16:27:45,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:46,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:46,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:46,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:15 [2021-05-03 16:27:46,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:27:46,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-05-03 16:27:46,113 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:27:46,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:46,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:46,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-05-03 16:27:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:46,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:27:46,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:27:46,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084531997] [2021-05-03 16:27:46,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:27:46,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:27:46,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:27:46,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:27:46,230 INFO L87 Difference]: Start difference. First operand 38799 states and 160742 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:47,058 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:27:47,758 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-05-03 16:27:49,710 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:27:50,150 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-05-03 16:27:51,217 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-05-03 16:27:51,783 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-05-03 16:27:52,130 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 16:27:52,799 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:27:54,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:27:54,161 INFO L93 Difference]: Finished difference Result 67047 states and 273559 transitions. [2021-05-03 16:27:54,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:27:54,164 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:27:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:27:54,419 INFO L225 Difference]: With dead ends: 67047 [2021-05-03 16:27:54,420 INFO L226 Difference]: Without dead ends: 66957 [2021-05-03 16:27:54,420 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 4389.3ms TimeCoverageRelationStatistics Valid=382, Invalid=1780, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:27:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66957 states. [2021-05-03 16:27:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66957 to 38963. [2021-05-03 16:27:55,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38963 states, 38962 states have (on average 4.142395154252862) internal successors, (161396), 38962 states have internal predecessors, (161396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:55,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38963 states to 38963 states and 161396 transitions. [2021-05-03 16:27:55,866 INFO L78 Accepts]: Start accepts. Automaton has 38963 states and 161396 transitions. Word has length 39 [2021-05-03 16:27:55,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:27:55,867 INFO L480 AbstractCegarLoop]: Abstraction has 38963 states and 161396 transitions. [2021-05-03 16:27:55,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand 38963 states and 161396 transitions. [2021-05-03 16:27:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:27:55,964 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:27:55,964 INFO L551 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] [2021-05-03 16:27:56,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:56,164 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:27:56,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:27:56,165 INFO L82 PathProgramCache]: Analyzing trace with hash 159853789, now seen corresponding path program 61 times [2021-05-03 16:27:56,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:27:56,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558721385] [2021-05-03 16:27:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:27:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:56,505 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-05-03 16:27:56,655 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:27:57,297 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:27:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:57,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558721385] [2021-05-03 16:27:57,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575238657] [2021-05-03 16:27:57,604 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:27:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:27:57,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:27:57,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:27:58,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:27:58,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:58,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:58,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:58,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:27:58,531 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:27:58,531 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 39 treesize of output 27 [2021-05-03 16:27:58,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:27:58,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:27:58,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:27:58,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:27:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:27:58,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:27:58,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:27:58,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048298911] [2021-05-03 16:27:58,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:27:58,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:27:58,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:27:58,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:27:58,710 INFO L87 Difference]: Start difference. First operand 38963 states and 161396 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:27:59,847 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-03 16:28:03,571 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-05-03 16:28:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:28:05,471 INFO L93 Difference]: Finished difference Result 99416 states and 403744 transitions. [2021-05-03 16:28:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:28:05,474 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:28:05,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:28:05,882 INFO L225 Difference]: With dead ends: 99416 [2021-05-03 16:28:05,883 INFO L226 Difference]: Without dead ends: 99280 [2021-05-03 16:28:05,883 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 4224.3ms TimeCoverageRelationStatistics Valid=446, Invalid=2004, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 16:28:06,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99280 states. [2021-05-03 16:28:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99280 to 38539. [2021-05-03 16:28:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38539 states, 38538 states have (on average 4.1451554310031655) internal successors, (159746), 38538 states have internal predecessors, (159746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38539 states to 38539 states and 159746 transitions. [2021-05-03 16:28:07,701 INFO L78 Accepts]: Start accepts. Automaton has 38539 states and 159746 transitions. Word has length 39 [2021-05-03 16:28:07,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:28:07,702 INFO L480 AbstractCegarLoop]: Abstraction has 38539 states and 159746 transitions. [2021-05-03 16:28:07,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 38539 states and 159746 transitions. [2021-05-03 16:28:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:28:07,804 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:28:07,804 INFO L551 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] [2021-05-03 16:28:08,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:08,005 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:28:08,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:28:08,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1095343571, now seen corresponding path program 62 times [2021-05-03 16:28:08,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:28:08,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893313106] [2021-05-03 16:28:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:28:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:28:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:09,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893313106] [2021-05-03 16:28:09,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343015209] [2021-05-03 16:28:09,239 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:09,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:28:09,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:28:09,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:28:09,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:28:09,971 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:28:09,971 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 21 [2021-05-03 16:28:09,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:09,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:09,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:09,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-05-03 16:28:10,510 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-03 16:28:10,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:28:10,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:10,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:10,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:10,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:28:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:10,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:28:10,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:28:10,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098794495] [2021-05-03 16:28:10,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:28:10,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:28:10,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:28:10,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:28:10,737 INFO L87 Difference]: Start difference. First operand 38539 states and 159746 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:12,067 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 16:28:12,455 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:28:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:28:15,436 INFO L93 Difference]: Finished difference Result 66725 states and 273315 transitions. [2021-05-03 16:28:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:28:15,439 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:28:15,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:28:15,697 INFO L225 Difference]: With dead ends: 66725 [2021-05-03 16:28:15,697 INFO L226 Difference]: Without dead ends: 66533 [2021-05-03 16:28:15,698 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 3900.4ms TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:28:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66533 states. [2021-05-03 16:28:16,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66533 to 38563. [2021-05-03 16:28:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38563 states, 38562 states have (on average 4.144753902805871) internal successors, (159830), 38562 states have internal predecessors, (159830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38563 states to 38563 states and 159830 transitions. [2021-05-03 16:28:17,131 INFO L78 Accepts]: Start accepts. Automaton has 38563 states and 159830 transitions. Word has length 39 [2021-05-03 16:28:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:28:17,131 INFO L480 AbstractCegarLoop]: Abstraction has 38563 states and 159830 transitions. [2021-05-03 16:28:17,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 38563 states and 159830 transitions. [2021-05-03 16:28:17,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:28:17,231 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:28:17,231 INFO L551 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] [2021-05-03 16:28:17,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-05-03 16:28:17,432 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:28:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:28:17,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1049841687, now seen corresponding path program 63 times [2021-05-03 16:28:17,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:28:17,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477003418] [2021-05-03 16:28:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:28:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:28:17,832 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:28:18,507 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:28:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:18,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477003418] [2021-05-03 16:28:18,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523966626] [2021-05-03 16:28:18,880 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:18,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:28:18,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:28:18,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 16:28:18,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:28:20,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:20,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:20,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-05-03 16:28:20,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:20,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:20,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:28:20,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:63 [2021-05-03 16:28:20,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:20,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-05-03 16:28:20,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:20,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:20,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:20,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:112 [2021-05-03 16:28:21,015 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 16:28:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:21,489 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-05-03 16:28:21,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2021-05-03 16:28:21,495 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:21,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:21,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-05-03 16:28:21,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:21,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:21,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:28:21,558 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:28:21,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:21,645 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-05-03 16:28:21,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2021-05-03 16:28:21,651 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:21,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:28:21,659 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:21,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:21,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:28:21,704 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:28:21,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:21,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:28:21,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:28:21,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-05-03 16:28:21,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:21,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:21,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:28:21,775 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:28:21,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:21,820 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-05-03 16:28:21,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 1 [2021-05-03 16:28:21,824 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:21,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:21,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:21,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 34 [2021-05-03 16:28:21,881 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-05-03 16:28:22,506 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-03 16:28:22,508 INFO L628 ElimStorePlain]: treesize reduction 117, result has 51.5 percent of original size [2021-05-03 16:28:22,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:28:22,520 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:363, output treesize:128 [2021-05-03 16:28:22,800 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 16:28:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:23,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:28:23,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-05-03 16:28:23,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186672867] [2021-05-03 16:28:23,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 16:28:23,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:28:23,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 16:28:23,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:28:23,207 INFO L87 Difference]: Start difference. First operand 38563 states and 159830 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 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) [2021-05-03 16:28:24,520 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 14 [2021-05-03 16:28:25,595 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-05-03 16:28:26,374 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-05-03 16:28:26,791 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2021-05-03 16:28:27,415 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-05-03 16:28:27,873 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-05-03 16:28:28,269 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-05-03 16:28:28,704 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-05-03 16:28:29,259 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-05-03 16:28:29,701 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2021-05-03 16:28:30,031 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-05-03 16:28:30,539 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-05-03 16:28:30,903 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-05-03 16:28:31,727 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-05-03 16:28:32,139 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-05-03 16:28:32,777 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-05-03 16:28:33,242 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-03 16:28:33,741 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-05-03 16:28:34,201 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-05-03 16:28:34,507 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-05-03 16:28:35,030 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-05-03 16:28:35,578 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-05-03 16:28:36,370 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-05-03 16:28:37,091 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-05-03 16:28:37,774 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-05-03 16:28:38,137 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-05-03 16:28:38,965 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-05-03 16:28:39,578 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-05-03 16:28:40,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:28:40,542 INFO L93 Difference]: Finished difference Result 69019 states and 280817 transitions. [2021-05-03 16:28:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 16:28:40,545 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 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 39 [2021-05-03 16:28:40,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:28:40,807 INFO L225 Difference]: With dead ends: 69019 [2021-05-03 16:28:40,808 INFO L226 Difference]: Without dead ends: 68871 [2021-05-03 16:28:40,808 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 14235.6ms TimeCoverageRelationStatistics Valid=940, Invalid=4912, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 16:28:40,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68871 states. [2021-05-03 16:28:41,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68871 to 38767. [2021-05-03 16:28:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38767 states, 38766 states have (on average 4.142805551256256) internal successors, (160600), 38766 states have internal predecessors, (160600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38767 states to 38767 states and 160600 transitions. [2021-05-03 16:28:42,187 INFO L78 Accepts]: Start accepts. Automaton has 38767 states and 160600 transitions. Word has length 39 [2021-05-03 16:28:42,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:28:42,187 INFO L480 AbstractCegarLoop]: Abstraction has 38767 states and 160600 transitions. [2021-05-03 16:28:42,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 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) [2021-05-03 16:28:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 38767 states and 160600 transitions. [2021-05-03 16:28:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:28:42,287 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:28:42,287 INFO L551 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] [2021-05-03 16:28:42,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-03 16:28:42,494 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:28:42,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:28:42,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1563288699, now seen corresponding path program 64 times [2021-05-03 16:28:42,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:28:42,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145679335] [2021-05-03 16:28:42,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:28:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:28:42,724 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:28:43,401 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:28:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:43,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145679335] [2021-05-03 16:28:43,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389653544] [2021-05-03 16:28:43,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:43,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:28:43,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:28:43,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:28:43,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:28:44,692 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:28:44,692 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 21 [2021-05-03 16:28:44,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:44,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:44,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:44,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-05-03 16:28:44,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:28:44,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:44,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:44,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:28:44,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:28:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:45,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:28:45,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:28:45,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534388716] [2021-05-03 16:28:45,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:28:45,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:28:45,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:28:45,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:28:45,042 INFO L87 Difference]: Start difference. First operand 38767 states and 160600 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:46,240 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-03 16:28:46,988 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-03 16:28:47,256 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:28:47,495 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 16:28:47,786 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:28:48,004 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-03 16:28:51,303 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-03 16:28:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:28:52,308 INFO L93 Difference]: Finished difference Result 81937 states and 333038 transitions. [2021-05-03 16:28:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:28:52,310 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:28:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:28:52,655 INFO L225 Difference]: With dead ends: 81937 [2021-05-03 16:28:52,655 INFO L226 Difference]: Without dead ends: 81713 [2021-05-03 16:28:52,656 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 5188.4ms TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:28:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81713 states. [2021-05-03 16:28:54,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81713 to 38719. [2021-05-03 16:28:54,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38719 states, 38718 states have (on average 4.143292525440364) internal successors, (160420), 38718 states have internal predecessors, (160420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38719 states to 38719 states and 160420 transitions. [2021-05-03 16:28:54,363 INFO L78 Accepts]: Start accepts. Automaton has 38719 states and 160420 transitions. Word has length 39 [2021-05-03 16:28:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:28:54,364 INFO L480 AbstractCegarLoop]: Abstraction has 38719 states and 160420 transitions. [2021-05-03 16:28:54,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:28:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 38719 states and 160420 transitions. [2021-05-03 16:28:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:28:54,468 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:28:54,468 INFO L551 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] [2021-05-03 16:28:54,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-05-03 16:28:54,669 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:28:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:28:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1373542401, now seen corresponding path program 65 times [2021-05-03 16:28:54,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:28:54,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463826324] [2021-05-03 16:28:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:28:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:28:55,777 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:28:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:56,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463826324] [2021-05-03 16:28:56,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298541705] [2021-05-03 16:28:56,150 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:28:56,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:28:56,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:28:56,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:28:56,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:28:57,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:57,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:57,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:57,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-05-03 16:28:57,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:57,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:57,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:28:57,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:95 [2021-05-03 16:28:58,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:58,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:58,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:58,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-05-03 16:28:58,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:58,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:58,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 16:28:58,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:28:58,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:58,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:58,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:58,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:58,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-05-03 16:28:58,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 16:28:58,735 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-05-03 16:28:58,736 INFO L628 ElimStorePlain]: treesize reduction 47, result has 66.7 percent of original size [2021-05-03 16:28:58,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-05-03 16:28:58,758 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:156, output treesize:76 [2021-05-03 16:28:59,016 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 16:28:59,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:59,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:59,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:28:59,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:59,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-05-03 16:28:59,391 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:28:59,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:28:59,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:28:59,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 16:28:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:28:59,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:28:59,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:28:59,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534880741] [2021-05-03 16:28:59,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:28:59,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:28:59,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:28:59,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:28:59,694 INFO L87 Difference]: Start difference. First operand 38719 states and 160420 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:00,085 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 16:29:00,338 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-05-03 16:29:00,652 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-05-03 16:29:01,014 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 16:29:02,220 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-05-03 16:29:02,490 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 16:29:02,749 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 16:29:02,985 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-03 16:29:03,421 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-05-03 16:29:03,952 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 16:29:04,408 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2021-05-03 16:29:05,315 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-05-03 16:29:05,737 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2021-05-03 16:29:06,003 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-03 16:29:06,778 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-05-03 16:29:07,300 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 16:29:07,607 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-05-03 16:29:07,981 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 16:29:08,546 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-05-03 16:29:09,087 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-05-03 16:29:09,413 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 16:29:09,881 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 16:29:10,687 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-05-03 16:29:11,529 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-05-03 16:29:12,083 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-05-03 16:29:12,695 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-05-03 16:29:12,978 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:29:13,225 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:29:13,455 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:29:15,127 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-05-03 16:29:15,582 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-05-03 16:29:16,100 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-03 16:29:16,917 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-05-03 16:29:17,295 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-03 16:29:17,770 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-03 16:29:18,086 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-05-03 16:29:18,393 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-03 16:29:19,960 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-05-03 16:29:21,403 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 16:29:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:29:23,956 INFO L93 Difference]: Finished difference Result 93148 states and 377918 transitions. [2021-05-03 16:29:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-03 16:29:23,960 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:29:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:29:24,377 INFO L225 Difference]: With dead ends: 93148 [2021-05-03 16:29:24,378 INFO L226 Difference]: Without dead ends: 92681 [2021-05-03 16:29:24,378 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 16465.9ms TimeCoverageRelationStatistics Valid=1205, Invalid=6805, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 16:29:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92681 states. [2021-05-03 16:29:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92681 to 38859. [2021-05-03 16:29:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38859 states, 38858 states have (on average 4.142261567759535) internal successors, (160960), 38858 states have internal predecessors, (160960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38859 states to 38859 states and 160960 transitions. [2021-05-03 16:29:26,287 INFO L78 Accepts]: Start accepts. Automaton has 38859 states and 160960 transitions. Word has length 39 [2021-05-03 16:29:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:29:26,287 INFO L480 AbstractCegarLoop]: Abstraction has 38859 states and 160960 transitions. [2021-05-03 16:29:26,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 38859 states and 160960 transitions. [2021-05-03 16:29:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:29:26,392 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:29:26,392 INFO L551 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] [2021-05-03 16:29:26,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-03 16:29:26,593 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:29:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:29:26,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1169621655, now seen corresponding path program 66 times [2021-05-03 16:29:26,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:29:26,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348248507] [2021-05-03 16:29:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:29:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:29:26,724 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 16:29:26,877 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:29:27,742 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:29:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:29:28,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348248507] [2021-05-03 16:29:28,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738896082] [2021-05-03 16:29:28,137 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:29:28,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:29:28,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:29:28,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 16:29:28,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:29:30,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:29:30,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:30,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:30,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:29:30,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:47 [2021-05-03 16:29:30,302 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:29:30,303 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 23 [2021-05-03 16:29:30,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:30,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:30,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:29:30,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:16 [2021-05-03 16:29:30,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:29:30,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 16:29:30,498 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:29:30,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:30,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:29:30,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-05-03 16:29:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:29:30,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:29:30,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:29:30,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739043887] [2021-05-03 16:29:30,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:29:30,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:29:30,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:29:30,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:29:30,678 INFO L87 Difference]: Start difference. First operand 38859 states and 160960 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:32,005 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:29:32,306 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-03 16:29:33,127 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-05-03 16:29:33,690 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-05-03 16:29:35,115 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 16:29:36,291 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-03 16:29:36,978 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-05-03 16:29:38,065 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-05-03 16:29:38,352 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 16:29:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:29:40,862 INFO L93 Difference]: Finished difference Result 66745 states and 272318 transitions. [2021-05-03 16:29:40,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:29:40,866 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:29:40,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:29:41,093 INFO L225 Difference]: With dead ends: 66745 [2021-05-03 16:29:41,093 INFO L226 Difference]: Without dead ends: 66655 [2021-05-03 16:29:41,093 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 6312.0ms TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:29:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66655 states. [2021-05-03 16:29:42,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66655 to 39027. [2021-05-03 16:29:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39027 states, 39026 states have (on average 4.141341669656127) internal successors, (161620), 39026 states have internal predecessors, (161620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39027 states to 39027 states and 161620 transitions. [2021-05-03 16:29:42,655 INFO L78 Accepts]: Start accepts. Automaton has 39027 states and 161620 transitions. Word has length 39 [2021-05-03 16:29:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:29:42,655 INFO L480 AbstractCegarLoop]: Abstraction has 39027 states and 161620 transitions. [2021-05-03 16:29:42,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 39027 states and 161620 transitions. [2021-05-03 16:29:42,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:29:42,761 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:29:42,762 INFO L551 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] [2021-05-03 16:29:42,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-05-03 16:29:42,962 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:29:42,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:29:42,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1527583717, now seen corresponding path program 67 times [2021-05-03 16:29:42,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:29:42,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399946469] [2021-05-03 16:29:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:29:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:29:43,203 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:29:44,052 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:29:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:29:44,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399946469] [2021-05-03 16:29:44,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975613847] [2021-05-03 16:29:44,416 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:29:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:29:44,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:29:44,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:29:45,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:29:45,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:45,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:45,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:29:45,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:29:45,708 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:29:45,708 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 39 treesize of output 27 [2021-05-03 16:29:45,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:29:45,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:29:45,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:29:45,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:29:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:29:46,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:29:46,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:29:46,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405566333] [2021-05-03 16:29:46,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:29:46,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:29:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:29:46,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:29:46,061 INFO L87 Difference]: Start difference. First operand 39027 states and 161620 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:46,703 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:29:47,974 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-03 16:29:49,697 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 16:29:50,974 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-05-03 16:29:52,063 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-05-03 16:29:52,505 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:29:53,448 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-05-03 16:29:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:29:55,355 INFO L93 Difference]: Finished difference Result 99611 states and 404417 transitions. [2021-05-03 16:29:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:29:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:29:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:29:55,789 INFO L225 Difference]: With dead ends: 99611 [2021-05-03 16:29:55,790 INFO L226 Difference]: Without dead ends: 99475 [2021-05-03 16:29:55,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 6239.6ms TimeCoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:29:55,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99475 states. [2021-05-03 16:29:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99475 to 38559. [2021-05-03 16:29:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38559 states, 38558 states have (on average 4.144820789460034) internal successors, (159816), 38558 states have internal predecessors, (159816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38559 states to 38559 states and 159816 transitions. [2021-05-03 16:29:57,760 INFO L78 Accepts]: Start accepts. Automaton has 38559 states and 159816 transitions. Word has length 39 [2021-05-03 16:29:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:29:57,760 INFO L480 AbstractCegarLoop]: Abstraction has 38559 states and 159816 transitions. [2021-05-03 16:29:57,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:29:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 38559 states and 159816 transitions. [2021-05-03 16:29:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:29:57,865 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:29:57,865 INFO L551 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] [2021-05-03 16:29:58,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-03 16:29:58,066 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:29:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:29:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash -912086607, now seen corresponding path program 68 times [2021-05-03 16:29:58,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:29:58,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710215501] [2021-05-03 16:29:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:29:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:29:58,650 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-05-03 16:29:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:29:59,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710215501] [2021-05-03 16:29:59,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896342121] [2021-05-03 16:29:59,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:29:59,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:29:59,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:29:59,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-03 16:29:59,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:30:00,413 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:30:00,414 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 28 treesize of output 16 [2021-05-03 16:30:00,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:00,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:00,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:00,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-05-03 16:30:00,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-05-03 16:30:00,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:00,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:00,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:00,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-05-03 16:30:00,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:00,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-05-03 16:30:00,954 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:30:00,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:00,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:30:00,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-05-03 16:30:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:01,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:30:01,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:30:01,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189714776] [2021-05-03 16:30:01,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:30:01,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:30:01,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:30:01,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:30:01,198 INFO L87 Difference]: Start difference. First operand 38559 states and 159816 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:02,070 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 16:30:03,874 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-05-03 16:30:04,779 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-05-03 16:30:05,850 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 16:30:06,578 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-05-03 16:30:08,139 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 16:30:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:30:12,232 INFO L93 Difference]: Finished difference Result 85936 states and 353751 transitions. [2021-05-03 16:30:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:30:12,240 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:30:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:30:12,631 INFO L225 Difference]: With dead ends: 85936 [2021-05-03 16:30:12,632 INFO L226 Difference]: Without dead ends: 85881 [2021-05-03 16:30:12,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 6319.6ms TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:30:12,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85881 states. [2021-05-03 16:30:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85881 to 39379. [2021-05-03 16:30:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39379 states, 39378 states have (on average 4.140992432322617) internal successors, (163064), 39378 states have internal predecessors, (163064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39379 states to 39379 states and 163064 transitions. [2021-05-03 16:30:14,477 INFO L78 Accepts]: Start accepts. Automaton has 39379 states and 163064 transitions. Word has length 39 [2021-05-03 16:30:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:30:14,477 INFO L480 AbstractCegarLoop]: Abstraction has 39379 states and 163064 transitions. [2021-05-03 16:30:14,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 39379 states and 163064 transitions. [2021-05-03 16:30:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:30:14,600 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:30:14,600 INFO L551 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] [2021-05-03 16:30:14,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:30:14,800 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:30:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:30:14,802 INFO L82 PathProgramCache]: Analyzing trace with hash -659404043, now seen corresponding path program 69 times [2021-05-03 16:30:14,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:30:14,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583725755] [2021-05-03 16:30:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:30:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:30:14,967 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 16:30:15,127 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:30:16,030 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-03 16:30:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:16,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583725755] [2021-05-03 16:30:16,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335853642] [2021-05-03 16:30:16,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:30:16,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:30:16,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:30:16,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 16:30:16,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:30:17,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:17,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:17,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-05-03 16:30:17,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:17,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:17,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:17,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:93 [2021-05-03 16:30:18,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:30:18,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:18,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:18,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:18,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:30:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:18,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:30:18,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:30:18,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646817318] [2021-05-03 16:30:18,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:30:18,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:30:18,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:30:18,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:30:18,446 INFO L87 Difference]: Start difference. First operand 39379 states and 163064 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:19,846 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-03 16:30:20,843 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-03 16:30:21,146 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:30:21,492 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-05-03 16:30:21,829 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:30:23,291 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-05-03 16:30:24,053 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 16:30:24,732 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-05-03 16:30:25,065 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-05-03 16:30:25,670 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-05-03 16:30:26,534 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 16:30:26,808 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:30:27,070 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 16:30:27,699 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-05-03 16:30:28,001 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-05-03 16:30:28,638 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 16:30:29,009 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:30:29,587 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:30:29,964 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-03 16:30:31,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:30:31,026 INFO L93 Difference]: Finished difference Result 84759 states and 343708 transitions. [2021-05-03 16:30:31,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:30:31,030 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:30:31,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:30:31,402 INFO L225 Difference]: With dead ends: 84759 [2021-05-03 16:30:31,402 INFO L226 Difference]: Without dead ends: 84511 [2021-05-03 16:30:31,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 9733.8ms TimeCoverageRelationStatistics Valid=511, Invalid=3271, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 16:30:31,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84511 states. [2021-05-03 16:30:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84511 to 39565. [2021-05-03 16:30:32,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39565 states, 39564 states have (on average 4.139975735517137) internal successors, (163794), 39564 states have internal predecessors, (163794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:33,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39565 states to 39565 states and 163794 transitions. [2021-05-03 16:30:33,099 INFO L78 Accepts]: Start accepts. Automaton has 39565 states and 163794 transitions. Word has length 39 [2021-05-03 16:30:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:30:33,099 INFO L480 AbstractCegarLoop]: Abstraction has 39565 states and 163794 transitions. [2021-05-03 16:30:33,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 39565 states and 163794 transitions. [2021-05-03 16:30:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:30:33,205 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:30:33,205 INFO L551 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] [2021-05-03 16:30:33,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-05-03 16:30:33,406 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:30:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:30:33,406 INFO L82 PathProgramCache]: Analyzing trace with hash -2069317459, now seen corresponding path program 70 times [2021-05-03 16:30:33,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:30:33,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226123220] [2021-05-03 16:30:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:30:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:30:33,606 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-05-03 16:30:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:34,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226123220] [2021-05-03 16:30:34,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326296421] [2021-05-03 16:30:34,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:30:34,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:30:34,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:30:34,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:30:34,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:30:35,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:30:35,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:35,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:35,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:35,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:30:35,935 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:30:35,936 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 34 treesize of output 22 [2021-05-03 16:30:35,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:35,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:35,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:30:35,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-05-03 16:30:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:36,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:30:36,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-05-03 16:30:36,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816680536] [2021-05-03 16:30:36,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 16:30:36,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:30:36,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 16:30:36,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:30:36,224 INFO L87 Difference]: Start difference. First operand 39565 states and 163794 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:37,622 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 16:30:38,607 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:30:39,084 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 16:30:40,357 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 16:30:40,921 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 16:30:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:30:45,847 INFO L93 Difference]: Finished difference Result 80823 states and 332842 transitions. [2021-05-03 16:30:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:30:45,852 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:30:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:30:46,195 INFO L225 Difference]: With dead ends: 80823 [2021-05-03 16:30:46,195 INFO L226 Difference]: Without dead ends: 80768 [2021-05-03 16:30:46,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 4577.0ms TimeCoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 16:30:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80768 states. [2021-05-03 16:30:47,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80768 to 40133. [2021-05-03 16:30:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40133 states, 40132 states have (on average 4.142778829861458) internal successors, (166258), 40132 states have internal predecessors, (166258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40133 states to 40133 states and 166258 transitions. [2021-05-03 16:30:48,040 INFO L78 Accepts]: Start accepts. Automaton has 40133 states and 166258 transitions. Word has length 39 [2021-05-03 16:30:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:30:48,040 INFO L480 AbstractCegarLoop]: Abstraction has 40133 states and 166258 transitions. [2021-05-03 16:30:48,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 40133 states and 166258 transitions. [2021-05-03 16:30:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:30:48,159 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:30:48,159 INFO L551 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] [2021-05-03 16:30:48,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:30:48,360 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:30:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:30:48,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1588061807, now seen corresponding path program 71 times [2021-05-03 16:30:48,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:30:48,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682651771] [2021-05-03 16:30:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:30:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:30:48,598 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-05-03 16:30:49,941 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 16:30:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:50,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682651771] [2021-05-03 16:30:50,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076856105] [2021-05-03 16:30:50,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:30:50,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:30:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:30:50,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 16:30:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:30:51,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:30:51,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:51,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-05-03 16:30:51,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:52,002 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:30:52,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:52,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:30:52,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:72 [2021-05-03 16:30:52,917 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:30:54,865 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:30:55,276 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_32, v_prenex_30, v_prenex_34], 3=[q1]} [2021-05-03 16:30:55,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:55,320 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 22 treesize of output 24 [2021-05-03 16:30:55,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:30:55,695 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-05-03 16:30:55,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:55,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:55,735 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 22 treesize of output 24 [2021-05-03 16:30:55,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:30:56,087 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-05-03 16:30:56,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:56,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:56,127 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 22 treesize of output 24 [2021-05-03 16:30:56,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 16:30:56,456 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-03 16:30:56,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:56,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:56,565 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 33 treesize of output 51 [2021-05-03 16:30:56,572 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:30:56,989 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-03 16:30:56,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:30:57,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 4 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-05-03 16:30:57,107 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 15 variables, input treesize:216, output treesize:104 [2021-05-03 16:30:57,511 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:30:57,967 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:30:58,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:30:58,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 16:30:58,316 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:30:58,489 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-05-03 16:30:58,491 INFO L628 ElimStorePlain]: treesize reduction 14, result has 68.9 percent of original size [2021-05-03 16:30:58,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:30:58,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:21 [2021-05-03 16:30:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:30:58,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:30:58,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:30:58,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304010450] [2021-05-03 16:30:58,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:30:58,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:30:58,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:30:58,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:30:58,810 INFO L87 Difference]: Start difference. First operand 40133 states and 166258 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:30:59,285 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:30:59,637 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:31:00,214 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 24 [2021-05-03 16:31:00,739 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2021-05-03 16:31:01,611 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2021-05-03 16:31:02,406 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2021-05-03 16:31:03,284 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-05-03 16:31:04,177 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-05-03 16:31:05,207 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-05-03 16:31:06,020 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-03 16:31:07,005 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 16:31:07,580 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-05-03 16:31:08,514 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-05-03 16:31:09,363 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 64 [2021-05-03 16:31:09,810 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-03 16:31:10,796 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-05-03 16:31:11,236 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:31:11,615 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:31:12,377 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2021-05-03 16:31:12,741 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-05-03 16:31:13,672 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 16:31:14,519 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2021-05-03 16:31:15,343 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-05-03 16:31:16,156 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-03 16:31:17,418 WARN L205 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 72 [2021-05-03 16:31:17,925 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:31:19,894 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 115 DAG size of output: 101 [2021-05-03 16:31:20,773 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-05-03 16:31:20,959 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 16:31:21,965 WARN L205 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2021-05-03 16:31:22,347 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-05-03 16:31:23,269 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:31:23,957 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2021-05-03 16:31:24,292 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 16:31:25,006 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-05-03 16:31:26,959 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2021-05-03 16:31:27,532 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 16:31:28,331 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-05-03 16:31:28,768 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 16:31:29,596 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-05-03 16:31:30,393 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-05-03 16:31:30,814 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:31:31,661 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 16:31:33,062 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-05-03 16:31:33,768 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-05-03 16:31:34,930 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 16:31:36,074 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-05-03 16:31:37,275 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2021-05-03 16:31:37,843 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 16:31:38,482 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2021-05-03 16:31:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:31:39,432 INFO L93 Difference]: Finished difference Result 90147 states and 367709 transitions. [2021-05-03 16:31:39,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 16:31:39,437 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:31:39,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:31:39,857 INFO L225 Difference]: With dead ends: 90147 [2021-05-03 16:31:39,857 INFO L226 Difference]: Without dead ends: 90014 [2021-05-03 16:31:39,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 32650.3ms TimeCoverageRelationStatistics Valid=997, Invalid=7013, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 16:31:39,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90014 states. [2021-05-03 16:31:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90014 to 41032. [2021-05-03 16:31:41,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41032 states, 41031 states have (on average 4.142672613389876) internal successors, (169978), 41031 states have internal predecessors, (169978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41032 states to 41032 states and 169978 transitions. [2021-05-03 16:31:41,760 INFO L78 Accepts]: Start accepts. Automaton has 41032 states and 169978 transitions. Word has length 39 [2021-05-03 16:31:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:31:41,760 INFO L480 AbstractCegarLoop]: Abstraction has 41032 states and 169978 transitions. [2021-05-03 16:31:41,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 41032 states and 169978 transitions. [2021-05-03 16:31:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:31:41,878 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:31:41,878 INFO L551 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] [2021-05-03 16:31:42,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-05-03 16:31:42,081 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:31:42,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:31:42,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1287912465, now seen corresponding path program 72 times [2021-05-03 16:31:42,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:31:42,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663850239] [2021-05-03 16:31:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:31:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:31:42,335 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-03 16:31:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:31:43,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663850239] [2021-05-03 16:31:43,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962110935] [2021-05-03 16:31:43,482 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:31:43,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:31:43,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:31:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 16:31:43,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:31:44,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:31:44,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:31:44,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:44,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:31:44,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:31:45,032 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:31:45,032 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 39 treesize of output 27 [2021-05-03 16:31:45,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:31:45,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:31:45,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:31:45,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:31:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:31:45,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:31:45,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 16:31:45,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126941123] [2021-05-03 16:31:45,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:31:45,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:31:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:31:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:31:45,281 INFO L87 Difference]: Start difference. First operand 41032 states and 169978 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:46,437 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-05-03 16:31:46,830 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 16:31:48,195 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:31:48,834 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 16:31:50,727 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:31:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:31:55,607 INFO L93 Difference]: Finished difference Result 88681 states and 365549 transitions. [2021-05-03 16:31:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:31:55,612 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:31:55,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:31:56,008 INFO L225 Difference]: With dead ends: 88681 [2021-05-03 16:31:56,008 INFO L226 Difference]: Without dead ends: 88626 [2021-05-03 16:31:56,009 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 4916.1ms TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:31:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88626 states. [2021-05-03 16:31:57,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88626 to 41169. [2021-05-03 16:31:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41169 states, 41168 states have (on average 4.146060046638166) internal successors, (170685), 41168 states have internal predecessors, (170685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41169 states to 41169 states and 170685 transitions. [2021-05-03 16:31:58,039 INFO L78 Accepts]: Start accepts. Automaton has 41169 states and 170685 transitions. Word has length 39 [2021-05-03 16:31:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:31:58,039 INFO L480 AbstractCegarLoop]: Abstraction has 41169 states and 170685 transitions. [2021-05-03 16:31:58,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:31:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 41169 states and 170685 transitions. [2021-05-03 16:31:58,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:31:58,155 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:31:58,155 INFO L551 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] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forcibly destroying the process [2021-05-03 16:31:58,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:31:58,507 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:31:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:31:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2097715607, now seen corresponding path program 73 times [2021-05-03 16:31:58,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:31:58,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30013866] [2021-05-03 16:31:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] The stream was forcibly closed: stdIn [2021-05-03 16:31:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:31:58,801 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-05-03 16:32:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:00,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30013866] [2021-05-03 16:32:00,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977188089] [2021-05-03 16:32:00,019 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:32:00,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:32:00,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:32:01,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:32:01,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:01,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:01,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:01,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-05-03 16:32:01,427 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:32:01,427 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 39 treesize of output 27 [2021-05-03 16:32:01,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:01,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:01,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:01,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:32:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:01,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:32:01,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:32:01,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574077261] [2021-05-03 16:32:01,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:32:01,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:32:01,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:32:01,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:32:01,752 INFO L87 Difference]: Start difference. First operand 41169 states and 170685 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:02,012 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:32:02,295 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:32:02,620 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:32:02,972 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:32:03,216 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-05-03 16:32:03,616 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 16:32:04,737 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:32:05,077 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:32:05,603 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 16:32:06,946 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 16:32:07,680 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-03 16:32:08,887 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:32:09,515 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:32:12,592 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:32:14,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:32:14,362 INFO L93 Difference]: Finished difference Result 123805 states and 502785 transitions. [2021-05-03 16:32:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:32:14,368 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:32:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:32:14,947 INFO L225 Difference]: With dead ends: 123805 [2021-05-03 16:32:14,948 INFO L226 Difference]: Without dead ends: 123750 [2021-05-03 16:32:14,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 7614.0ms TimeCoverageRelationStatistics Valid=510, Invalid=2460, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 16:32:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123750 states. [2021-05-03 16:32:17,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123750 to 40312. [2021-05-03 16:32:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40312 states, 40311 states have (on average 4.139490461660589) internal successors, (166867), 40311 states have internal predecessors, (166867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40312 states to 40312 states and 166867 transitions. [2021-05-03 16:32:17,673 INFO L78 Accepts]: Start accepts. Automaton has 40312 states and 166867 transitions. Word has length 39 [2021-05-03 16:32:17,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:32:17,673 INFO L480 AbstractCegarLoop]: Abstraction has 40312 states and 166867 transitions. [2021-05-03 16:32:17,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:17,673 INFO L276 IsEmpty]: Start isEmpty. Operand 40312 states and 166867 transitions. [2021-05-03 16:32:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:32:17,796 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:32:17,796 INFO L551 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] [2021-05-03 16:32:17,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:17,996 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:32:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:32:17,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1492735063, now seen corresponding path program 74 times [2021-05-03 16:32:17,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:32:17,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812278139] [2021-05-03 16:32:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:32:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:32:18,131 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 16:32:18,294 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:32:19,257 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:32:19,502 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-03 16:32:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:19,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812278139] [2021-05-03 16:32:19,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831630723] [2021-05-03 16:32:19,886 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:19,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:32:19,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:32:19,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:32:19,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:32:21,168 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:32:21,168 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 21 [2021-05-03 16:32:21,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:21,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:21,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:21,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-05-03 16:32:21,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:32:21,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:21,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:21,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:21,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-05-03 16:32:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:21,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:32:21,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:32:21,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440846805] [2021-05-03 16:32:21,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:32:21,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:32:21,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:32:21,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:32:21,697 INFO L87 Difference]: Start difference. First operand 40312 states and 166867 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:22,663 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-05-03 16:32:22,952 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 16:32:23,395 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-03 16:32:24,377 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-05-03 16:32:24,741 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:32:25,069 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 16:32:25,521 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:32:25,822 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-05-03 16:32:26,060 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 16:32:27,257 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-05-03 16:32:28,024 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 16:32:29,302 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 16:32:30,768 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:32:31,700 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-03 16:32:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:32:32,660 INFO L93 Difference]: Finished difference Result 87552 states and 355793 transitions. [2021-05-03 16:32:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 16:32:32,664 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:32:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:32:33,038 INFO L225 Difference]: With dead ends: 87552 [2021-05-03 16:32:33,038 INFO L226 Difference]: Without dead ends: 87320 [2021-05-03 16:32:33,039 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 7776.0ms TimeCoverageRelationStatistics Valid=441, Invalid=2211, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:32:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87320 states. [2021-05-03 16:32:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87320 to 40364. [2021-05-03 16:32:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40364 states, 40363 states have (on average 4.139162103907044) internal successors, (167069), 40363 states have internal predecessors, (167069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40364 states to 40364 states and 167069 transitions. [2021-05-03 16:32:34,916 INFO L78 Accepts]: Start accepts. Automaton has 40364 states and 167069 transitions. Word has length 39 [2021-05-03 16:32:34,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:32:34,916 INFO L480 AbstractCegarLoop]: Abstraction has 40364 states and 167069 transitions. [2021-05-03 16:32:34,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 40364 states and 167069 transitions. [2021-05-03 16:32:35,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:32:35,032 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:32:35,032 INFO L551 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] [2021-05-03 16:32:35,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-05-03 16:32:35,233 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:32:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:32:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2088779397, now seen corresponding path program 75 times [2021-05-03 16:32:35,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:32:35,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355876543] [2021-05-03 16:32:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:32:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:32:35,390 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 16:32:35,568 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:32:36,567 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:32:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:37,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355876543] [2021-05-03 16:32:37,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592924871] [2021-05-03 16:32:37,085 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:37,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:32:37,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:32:37,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:32:37,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:32:39,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:39,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-05-03 16:32:39,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:39,453 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:32:39,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:39,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:39,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:68 [2021-05-03 16:32:39,718 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:32:39,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:32:40,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:40,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-05-03 16:32:40,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:40,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:32:40,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:40,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-05-03 16:32:40,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:40,218 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:32:40,219 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 41 treesize of output 33 [2021-05-03 16:32:40,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:40,269 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:32:40,270 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 30 treesize of output 26 [2021-05-03 16:32:40,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:40,668 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:32:40,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:40,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:32:40,689 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:249, output treesize:255 [2021-05-03 16:32:41,311 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-05-03 16:32:41,621 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:32:42,043 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-03 16:32:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:42,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:32:42,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-05-03 16:32:42,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719619535] [2021-05-03 16:32:42,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 16:32:42,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:32:42,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 16:32:42,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:32:42,341 INFO L87 Difference]: Start difference. First operand 40364 states and 167069 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 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) [2021-05-03 16:32:43,636 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-05-03 16:32:44,373 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-03 16:32:46,010 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2021-05-03 16:32:46,440 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:32:46,969 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-05-03 16:32:47,275 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-05-03 16:32:48,162 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-05-03 16:32:48,443 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-03 16:32:48,681 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-05-03 16:32:48,980 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:32:49,202 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-05-03 16:32:49,511 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-05-03 16:32:49,948 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-05-03 16:32:50,378 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-05-03 16:32:50,782 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:32:51,238 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-03 16:32:51,439 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:32:51,675 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:32:51,906 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-03 16:32:52,202 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 16:32:52,626 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-05-03 16:32:52,906 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-05-03 16:32:53,146 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-05-03 16:32:53,897 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-05-03 16:32:54,089 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-05-03 16:32:54,743 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-05-03 16:32:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:32:55,198 INFO L93 Difference]: Finished difference Result 79215 states and 320364 transitions. [2021-05-03 16:32:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 16:32:55,202 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 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 39 [2021-05-03 16:32:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:32:55,469 INFO L225 Difference]: With dead ends: 79215 [2021-05-03 16:32:55,470 INFO L226 Difference]: Without dead ends: 78957 [2021-05-03 16:32:55,470 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 12455.8ms TimeCoverageRelationStatistics Valid=801, Invalid=4311, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 16:32:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78957 states. [2021-05-03 16:32:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78957 to 40390. [2021-05-03 16:32:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40390 states, 40389 states have (on average 4.139320111911659) internal successors, (167183), 40389 states have internal predecessors, (167183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:32:56,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40390 states to 40390 states and 167183 transitions. [2021-05-03 16:32:56,744 INFO L78 Accepts]: Start accepts. Automaton has 40390 states and 167183 transitions. Word has length 39 [2021-05-03 16:32:56,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:32:56,744 INFO L480 AbstractCegarLoop]: Abstraction has 40390 states and 167183 transitions. [2021-05-03 16:32:56,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 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) [2021-05-03 16:32:56,744 INFO L276 IsEmpty]: Start isEmpty. Operand 40390 states and 167183 transitions. [2021-05-03 16:32:56,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:32:56,828 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:32:56,828 INFO L551 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] [2021-05-03 16:32:57,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:57,028 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:32:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:32:57,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1884858651, now seen corresponding path program 76 times [2021-05-03 16:32:57,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:32:57,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480566412] [2021-05-03 16:32:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:32:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:32:57,244 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 16:32:57,761 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:32:58,122 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:32:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:58,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480566412] [2021-05-03 16:32:58,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818789290] [2021-05-03 16:32:58,429 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:32:58,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:32:58,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:32:58,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:32:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:32:59,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:32:59,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:59,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:59,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:59,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-05-03 16:32:59,532 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:32:59,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-05-03 16:32:59,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:32:59,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:32:59,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:32:59,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:32:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:32:59,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:32:59,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 16:32:59,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993157154] [2021-05-03 16:32:59,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 16:32:59,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:32:59,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 16:32:59,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:32:59,735 INFO L87 Difference]: Start difference. First operand 40390 states and 167183 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:00,462 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:33:01,121 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-03 16:33:01,450 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 16:33:02,467 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-05-03 16:33:04,160 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:33:06,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:33:06,776 INFO L93 Difference]: Finished difference Result 75640 states and 308874 transitions. [2021-05-03 16:33:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:33:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:33:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:33:07,065 INFO L225 Difference]: With dead ends: 75640 [2021-05-03 16:33:07,065 INFO L226 Difference]: Without dead ends: 75550 [2021-05-03 16:33:07,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 4306.3ms TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:33:07,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75550 states. [2021-05-03 16:33:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75550 to 40506. [2021-05-03 16:33:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40506 states, 40505 states have (on average 4.139711146772004) internal successors, (167679), 40505 states have internal predecessors, (167679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:08,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40506 states to 40506 states and 167679 transitions. [2021-05-03 16:33:08,406 INFO L78 Accepts]: Start accepts. Automaton has 40506 states and 167679 transitions. Word has length 39 [2021-05-03 16:33:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:33:08,406 INFO L480 AbstractCegarLoop]: Abstraction has 40506 states and 167679 transitions. [2021-05-03 16:33:08,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 40506 states and 167679 transitions. [2021-05-03 16:33:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:33:08,496 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:33:08,496 INFO L551 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] [2021-05-03 16:33:08,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:33:08,696 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:33:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:33:08,697 INFO L82 PathProgramCache]: Analyzing trace with hash 278457189, now seen corresponding path program 77 times [2021-05-03 16:33:08,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:33:08,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476456496] [2021-05-03 16:33:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:33:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:33:09,618 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-05-03 16:33:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:09,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476456496] [2021-05-03 16:33:09,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211766907] [2021-05-03 16:33:09,953 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:33:09,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:33:09,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:33:09,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 16:33:09,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:33:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:11,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:11,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:11,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2021-05-03 16:33:11,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:11,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:11,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:33:11,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:73 [2021-05-03 16:33:12,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:12,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:12,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:12,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:12,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-05-03 16:33:12,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:33:12,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:12,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-05-03 16:33:12,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:12,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:12,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:33:12,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:12,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-05-03 16:33:12,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:12,723 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-05-03 16:33:12,725 INFO L628 ElimStorePlain]: treesize reduction 25, result has 73.1 percent of original size [2021-05-03 16:33:12,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-05-03 16:33:12,742 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:154, output treesize:52 [2021-05-03 16:33:13,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:13,096 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 9 treesize of output 14 [2021-05-03 16:33:13,102 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:33:13,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:13,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:33:13,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-05-03 16:33:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:13,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:33:13,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 16:33:13,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574359705] [2021-05-03 16:33:13,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 16:33:13,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:33:13,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 16:33:13,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:33:13,602 INFO L87 Difference]: Start difference. First operand 40506 states and 167679 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:13,984 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 16:33:14,283 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 16:33:14,627 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 16:33:15,013 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-03 16:33:16,130 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-05-03 16:33:16,445 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-03 16:33:16,826 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-03 16:33:17,625 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-05-03 16:33:18,270 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 16:33:18,610 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:33:19,714 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-05-03 16:33:19,987 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 16:33:20,994 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-05-03 16:33:21,977 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-05-03 16:33:22,394 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-05-03 16:33:22,805 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 16:33:23,332 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 16:33:23,535 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:33:23,975 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:33:24,299 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-05-03 16:33:24,612 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-05-03 16:33:25,094 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:33:25,500 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-05-03 16:33:25,755 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:33:26,220 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 16:33:27,036 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-03 16:33:27,367 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-05-03 16:33:27,987 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-05-03 16:33:29,883 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-03 16:33:31,508 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-05-03 16:33:31,914 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-05-03 16:33:32,241 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-05-03 16:33:32,915 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-05-03 16:33:33,210 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-05-03 16:33:34,569 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 16:33:36,065 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:33:36,837 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-05-03 16:33:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:33:37,862 INFO L93 Difference]: Finished difference Result 113735 states and 460760 transitions. [2021-05-03 16:33:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 16:33:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:33:37,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:33:38,349 INFO L225 Difference]: With dead ends: 113735 [2021-05-03 16:33:38,349 INFO L226 Difference]: Without dead ends: 113354 [2021-05-03 16:33:38,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2702 ImplicationChecksByTransitivity, 16533.0ms TimeCoverageRelationStatistics Valid=1285, Invalid=7645, Unknown=0, NotChecked=0, Total=8930 [2021-05-03 16:33:38,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113354 states. [2021-05-03 16:33:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113354 to 40488. [2021-05-03 16:33:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40488 states, 40487 states have (on average 4.139427470546101) internal successors, (167593), 40487 states have internal predecessors, (167593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40488 states to 40488 states and 167593 transitions. [2021-05-03 16:33:40,175 INFO L78 Accepts]: Start accepts. Automaton has 40488 states and 167593 transitions. Word has length 39 [2021-05-03 16:33:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:33:40,175 INFO L480 AbstractCegarLoop]: Abstraction has 40488 states and 167593 transitions. [2021-05-03 16:33:40,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 40488 states and 167593 transitions. [2021-05-03 16:33:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:33:40,262 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:33:40,262 INFO L551 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] [2021-05-03 16:33:40,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-05-03 16:33:40,462 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:33:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:33:40,463 INFO L82 PathProgramCache]: Analyzing trace with hash -120548947, now seen corresponding path program 78 times [2021-05-03 16:33:40,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:33:40,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244998676] [2021-05-03 16:33:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:33:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:33:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:41,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244998676] [2021-05-03 16:33:41,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097413018] [2021-05-03 16:33:41,437 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:33:41,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:33:41,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:33:41,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 16:33:41,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:33:42,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:33:42,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:42,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:42,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:33:42,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-05-03 16:33:42,428 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:33:42,428 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 34 treesize of output 22 [2021-05-03 16:33:42,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:42,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:42,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:33:42,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-05-03 16:33:43,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:43,045 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 11 treesize of output 16 [2021-05-03 16:33:43,052 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:33:43,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:43,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:33:43,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-05-03 16:33:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:43,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:33:43,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 16:33:43,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247372107] [2021-05-03 16:33:43,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 16:33:43,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:33:43,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 16:33:43,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:33:43,284 INFO L87 Difference]: Start difference. First operand 40488 states and 167593 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:44,012 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 16:33:45,352 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:33:45,731 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-05-03 16:33:46,777 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:33:47,149 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:33:49,591 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 16:33:50,525 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:33:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:33:52,562 INFO L93 Difference]: Finished difference Result 96582 states and 397880 transitions. [2021-05-03 16:33:52,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:33:52,566 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:33:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:33:52,914 INFO L225 Difference]: With dead ends: 96582 [2021-05-03 16:33:52,914 INFO L226 Difference]: Without dead ends: 96527 [2021-05-03 16:33:52,915 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 5762.3ms TimeCoverageRelationStatistics Valid=439, Invalid=2531, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 16:33:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96527 states. [2021-05-03 16:33:54,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96527 to 42316. [2021-05-03 16:33:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42316 states, 42315 states have (on average 4.139170506912443) internal successors, (175149), 42315 states have internal predecessors, (175149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42316 states to 42316 states and 175149 transitions. [2021-05-03 16:33:54,431 INFO L78 Accepts]: Start accepts. Automaton has 42316 states and 175149 transitions. Word has length 39 [2021-05-03 16:33:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:33:54,431 INFO L480 AbstractCegarLoop]: Abstraction has 42316 states and 175149 transitions. [2021-05-03 16:33:54,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 42316 states and 175149 transitions. [2021-05-03 16:33:54,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:33:54,511 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:33:54,512 INFO L551 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] [2021-05-03 16:33:54,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:33:54,713 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:33:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:33:54,714 INFO L82 PathProgramCache]: Analyzing trace with hash -758136977, now seen corresponding path program 79 times [2021-05-03 16:33:54,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:33:54,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698459094] [2021-05-03 16:33:54,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:33:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:33:54,916 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-05-03 16:33:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:55,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698459094] [2021-05-03 16:33:55,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033338235] [2021-05-03 16:33:55,663 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:33:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:33:55,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:33:55,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:33:56,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:33:56,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:56,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:56,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:33:56,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-05-03 16:33:56,838 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:33:56,838 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 39 treesize of output 27 [2021-05-03 16:33:56,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:33:56,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:33:56,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:33:56,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:33:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:33:57,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:33:57,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 16:33:57,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173813470] [2021-05-03 16:33:57,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:33:57,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:33:57,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:33:57,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:33:57,050 INFO L87 Difference]: Start difference. First operand 42316 states and 175149 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:33:59,413 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:34:00,219 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-05-03 16:34:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:34:06,717 INFO L93 Difference]: Finished difference Result 97967 states and 404050 transitions. [2021-05-03 16:34:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:34:06,722 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:34:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:34:07,370 INFO L225 Difference]: With dead ends: 97967 [2021-05-03 16:34:07,370 INFO L226 Difference]: Without dead ends: 97912 [2021-05-03 16:34:07,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 3880.9ms TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:34:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97912 states. [2021-05-03 16:34:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97912 to 44367. [2021-05-03 16:34:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44367 states, 44366 states have (on average 4.141955551548483) internal successors, (183762), 44366 states have internal predecessors, (183762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44367 states to 44367 states and 183762 transitions. [2021-05-03 16:34:09,122 INFO L78 Accepts]: Start accepts. Automaton has 44367 states and 183762 transitions. Word has length 39 [2021-05-03 16:34:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:34:09,122 INFO L480 AbstractCegarLoop]: Abstraction has 44367 states and 183762 transitions. [2021-05-03 16:34:09,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 44367 states and 183762 transitions. [2021-05-03 16:34:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:34:09,227 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:34:09,227 INFO L551 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] [2021-05-03 16:34:09,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-05-03 16:34:09,427 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:34:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:34:09,428 INFO L82 PathProgramCache]: Analyzing trace with hash 660856047, now seen corresponding path program 80 times [2021-05-03 16:34:09,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:34:09,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026603412] [2021-05-03 16:34:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:34:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:34:09,647 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-03 16:34:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:10,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026603412] [2021-05-03 16:34:10,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759617964] [2021-05-03 16:34:10,611 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:34:10,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:34:10,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:34:10,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:34:10,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:34:11,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:34:11,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:11,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:11,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:34:11,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-05-03 16:34:11,892 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:34:11,892 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 39 treesize of output 27 [2021-05-03 16:34:11,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:11,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:11,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:34:11,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:34:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:12,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:34:12,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 16:34:12,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997770730] [2021-05-03 16:34:12,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:34:12,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:34:12,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:34:12,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:34:12,096 INFO L87 Difference]: Start difference. First operand 44367 states and 183762 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:14,144 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:34:14,613 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-05-03 16:34:19,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:34:19,976 INFO L93 Difference]: Finished difference Result 94017 states and 387403 transitions. [2021-05-03 16:34:19,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:34:19,980 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:34:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:34:20,322 INFO L225 Difference]: With dead ends: 94017 [2021-05-03 16:34:20,322 INFO L226 Difference]: Without dead ends: 93962 [2021-05-03 16:34:20,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 4255.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:34:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93962 states. [2021-05-03 16:34:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93962 to 43759. [2021-05-03 16:34:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43759 states, 43758 states have (on average 4.140911376205493) internal successors, (181198), 43758 states have internal predecessors, (181198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43759 states to 43759 states and 181198 transitions. [2021-05-03 16:34:21,928 INFO L78 Accepts]: Start accepts. Automaton has 43759 states and 181198 transitions. Word has length 39 [2021-05-03 16:34:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:34:21,928 INFO L480 AbstractCegarLoop]: Abstraction has 43759 states and 181198 transitions. [2021-05-03 16:34:21,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 43759 states and 181198 transitions. [2021-05-03 16:34:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:34:22,020 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:34:22,020 INFO L551 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] [2021-05-03 16:34:22,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-05-03 16:34:22,221 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:34:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:34:22,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1354477999, now seen corresponding path program 81 times [2021-05-03 16:34:22,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:34:22,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875108745] [2021-05-03 16:34:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:34:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:34:22,699 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-03 16:34:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:23,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875108745] [2021-05-03 16:34:23,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230376873] [2021-05-03 16:34:23,585 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:34:23,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:34:23,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:34:23,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-03 16:34:23,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:34:24,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:24,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-05-03 16:34:24,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:24,918 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:34:24,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:24,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:34:24,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:68 [2021-05-03 16:34:25,125 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:34:25,407 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 16:34:25,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:25,904 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 30 treesize of output 30 [2021-05-03 16:34:25,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:34:25,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:25,941 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 30 treesize of output 30 [2021-05-03 16:34:25,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 16:34:25,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:26,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:26,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-05-03 16:34:26,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:26,220 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:34:26,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:26,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:34:26,241 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:183, output treesize:198 [2021-05-03 16:34:26,512 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:34:26,730 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:34:26,783 INFO L446 ElimStorePlain]: Different costs {0=[q2], 1=[v_prenex_36]} [2021-05-03 16:34:26,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2021-05-03 16:34:26,797 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:34:26,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:26,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:26,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-05-03 16:34:26,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:27,023 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 16:34:27,024 INFO L628 ElimStorePlain]: treesize reduction 13, result has 72.3 percent of original size [2021-05-03 16:34:27,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:34:27,027 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:32 [2021-05-03 16:34:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:27,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:34:27,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-05-03 16:34:27,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207760025] [2021-05-03 16:34:27,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 16:34:27,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:34:27,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 16:34:27,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:34:27,252 INFO L87 Difference]: Start difference. First operand 43759 states and 181198 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:30,490 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-05-03 16:34:31,238 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:34:32,481 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-05-03 16:34:33,504 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-05-03 16:34:34,406 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-05-03 16:34:34,986 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:34:35,401 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 16:34:36,081 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 16:34:36,383 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 16:34:37,018 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-03 16:34:37,842 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:34:38,088 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:34:38,935 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-03 16:34:39,250 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-05-03 16:34:39,834 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-05-03 16:34:40,503 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-03 16:34:40,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:34:40,986 INFO L93 Difference]: Finished difference Result 85716 states and 351669 transitions. [2021-05-03 16:34:40,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 16:34:40,989 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:34:40,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:34:41,252 INFO L225 Difference]: With dead ends: 85716 [2021-05-03 16:34:41,253 INFO L226 Difference]: Without dead ends: 85634 [2021-05-03 16:34:41,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 9553.0ms TimeCoverageRelationStatistics Valid=461, Invalid=3571, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 16:34:41,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85634 states. [2021-05-03 16:34:42,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85634 to 43965. [2021-05-03 16:34:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43965 states, 43964 states have (on average 4.1390910745155125) internal successors, (181971), 43964 states have internal predecessors, (181971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43965 states to 43965 states and 181971 transitions. [2021-05-03 16:34:42,814 INFO L78 Accepts]: Start accepts. Automaton has 43965 states and 181971 transitions. Word has length 39 [2021-05-03 16:34:42,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:34:42,814 INFO L480 AbstractCegarLoop]: Abstraction has 43965 states and 181971 transitions. [2021-05-03 16:34:42,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:42,814 INFO L276 IsEmpty]: Start isEmpty. Operand 43965 states and 181971 transitions. [2021-05-03 16:34:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:34:42,906 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:34:42,906 INFO L551 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] [2021-05-03 16:34:43,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-05-03 16:34:43,106 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:34:43,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:34:43,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1521496273, now seen corresponding path program 82 times [2021-05-03 16:34:43,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:34:43,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601280133] [2021-05-03 16:34:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:34:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:34:43,274 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-03 16:34:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:44,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601280133] [2021-05-03 16:34:44,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493857691] [2021-05-03 16:34:44,019 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:34:44,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:34:44,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:34:44,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 16:34:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:34:44,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-05-03 16:34:44,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:44,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:44,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:34:44,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-05-03 16:34:45,106 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:34:45,106 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 39 treesize of output 27 [2021-05-03 16:34:45,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:45,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:45,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:34:45,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-05-03 16:34:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:45,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:34:45,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 16:34:45,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98200884] [2021-05-03 16:34:45,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 16:34:45,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:34:45,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 16:34:45,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:34:45,276 INFO L87 Difference]: Start difference. First operand 43965 states and 181971 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:48,065 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-05-03 16:34:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:34:54,649 INFO L93 Difference]: Finished difference Result 94685 states and 390543 transitions. [2021-05-03 16:34:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:34:54,654 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 16:34:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:34:54,965 INFO L225 Difference]: With dead ends: 94685 [2021-05-03 16:34:54,965 INFO L226 Difference]: Without dead ends: 94630 [2021-05-03 16:34:54,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 3326.4ms TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:34:55,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94630 states. [2021-05-03 16:34:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94630 to 44548. [2021-05-03 16:34:56,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44548 states, 44547 states have (on average 4.142703212337532) internal successors, (184545), 44547 states have internal predecessors, (184545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44548 states to 44548 states and 184545 transitions. [2021-05-03 16:34:56,469 INFO L78 Accepts]: Start accepts. Automaton has 44548 states and 184545 transitions. Word has length 39 [2021-05-03 16:34:56,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:34:56,469 INFO L480 AbstractCegarLoop]: Abstraction has 44548 states and 184545 transitions. [2021-05-03 16:34:56,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:34:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 44548 states and 184545 transitions. [2021-05-03 16:34:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:34:56,562 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:34:56,562 INFO L551 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] [2021-05-03 16:34:56,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:34:56,765 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:34:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:34:56,765 INFO L82 PathProgramCache]: Analyzing trace with hash -855789521, now seen corresponding path program 83 times [2021-05-03 16:34:56,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:34:56,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059336135] [2021-05-03 16:34:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:34:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:34:56,945 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-03 16:34:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:34:58,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059336135] [2021-05-03 16:34:58,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280187600] [2021-05-03 16:34:58,075 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:34:58,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:34:58,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:34:58,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 16:34:58,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:34:59,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:34:59,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:59,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 65 [2021-05-03 16:34:59,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:34:59,410 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:34:59,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:34:59,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:34:59,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:87 [2021-05-03 16:35:00,677 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-05-03 16:35:02,343 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 16:35:02,833 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_54, v_prenex_57, v_prenex_48], 3=[q2, v_prenex_51]} [2021-05-03 16:35:02,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:35:02,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 16:35:02,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:03,170 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-03 16:35:03,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:03,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:35:03,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 16:35:03,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:03,470 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-03 16:35:03,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:03,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:35:03,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-05-03 16:35:03,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:03,774 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-05-03 16:35:03,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:03,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:35:03,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:35:03,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-05-03 16:35:03,797 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:04,065 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-03 16:35:04,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:04,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:35:04,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:35:04,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-05-03 16:35:04,092 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:35:04,321 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 16:35:04,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:04,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:35:04,336 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 17 variables, input treesize:204, output treesize:69 [2021-05-03 16:35:04,723 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 16:35:04,950 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 16:35:05,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:35:05,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:35:05,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:35:05,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:05,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-05-03 16:35:05,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:35:05,328 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:35:05,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:35:05,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:35:05,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:58 [2021-05-03 16:35:05,599 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:35:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:35:05,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:35:05,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-05-03 16:35:05,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170109506] [2021-05-03 16:35:05,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 16:35:05,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:35:05,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 16:35:05,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:35:05,936 INFO L87 Difference]: Start difference. First operand 44548 states and 184545 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:35:06,421 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 16:35:06,725 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 16:35:07,156 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 16:35:08,032 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 30 [2021-05-03 16:35:08,925 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 37 [2021-05-03 16:35:09,988 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-05-03 16:35:10,907 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 44 [2021-05-03 16:35:12,172 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-05-03 16:35:13,024 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2021-05-03 16:35:13,790 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2021-05-03 16:35:14,444 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-05-03 16:35:15,263 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-05-03 16:35:15,986 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2021-05-03 16:35:16,661 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-05-03 16:35:17,393 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 45 Received shutdown request... [2021-05-03 16:35:17,794 WARN L222 SmtUtils]: Removed 8 from assertion stack [2021-05-03 16:35:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:35:17,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-05-03 16:35:17,995 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 16:35:17,999 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 16:35:17,999 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 04:35:17 BasicIcfg [2021-05-03 16:35:17,999 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 16:35:18,000 INFO L168 Benchmark]: Toolchain (without parser) took 805669.15 ms. Allocated memory was 341.8 MB in the beginning and 14.4 GB in the end (delta: 14.0 GB). Free memory was 321.1 MB in the beginning and 11.8 GB in the end (delta: -11.5 GB). Peak memory consumption was 2.6 GB. Max. memory is 16.0 GB. [2021-05-03 16:35:18,000 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 341.8 MB. Free memory is still 322.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:35:18,000 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.98 ms. Allocated memory is still 341.8 MB. Free memory was 321.0 MB in the beginning and 319.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:35:18,000 INFO L168 Benchmark]: Boogie Preprocessor took 16.55 ms. Allocated memory is still 341.8 MB. Free memory was 319.6 MB in the beginning and 318.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 16:35:18,000 INFO L168 Benchmark]: RCFGBuilder took 238.10 ms. Allocated memory is still 341.8 MB. Free memory was 318.4 MB in the beginning and 303.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-03 16:35:18,000 INFO L168 Benchmark]: TraceAbstraction took 805389.60 ms. Allocated memory was 341.8 MB in the beginning and 14.4 GB in the end (delta: 14.0 GB). Free memory was 302.7 MB in the beginning and 11.8 GB in the end (delta: -11.5 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.0 GB. [2021-05-03 16:35:18,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 341.8 MB. Free memory is still 322.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.98 ms. Allocated memory is still 341.8 MB. Free memory was 321.0 MB in the beginning and 319.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.55 ms. Allocated memory is still 341.8 MB. Free memory was 319.6 MB in the beginning and 318.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 238.10 ms. Allocated memory is still 341.8 MB. Free memory was 318.4 MB in the beginning and 303.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 805389.60 ms. Allocated memory was 341.8 MB in the beginning and 14.4 GB in the end (delta: 14.0 GB). Free memory was 302.7 MB in the beginning and 11.8 GB in the end (delta: -11.5 GB). Peak memory consumption was 2.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 82). Cancelled while BasicCegarLoop was constructing difference of abstraction (44548states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 94 for 208ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 805275.9ms, OverallIterations: 92, TraceHistogramMax: 2, EmptinessCheckTime: 7626.1ms, AutomataDifference: 517582.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 52.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6427 SDtfs, 35934 SDslu, 71608 SDs, 0 SdLazy, 127735 SolverSat, 6743 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 101400.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6104 GetRequests, 2325 SyntacticMatches, 101 SemanticMatches, 3677 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56626 ImplicationChecksByTransitivity, 326508.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44548occurred in iteration=91, InterpolantAutomatonStates: 2689, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 106038.7ms AutomataMinimizationTime, 91 MinimizatonAttempts, 2748808 StatesRemovedByMinimization, 91 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 403.5ms SsaConstructionTime, 1848.4ms SatisfiabilityAnalysisTime, 152273.2ms InterpolantComputationTime, 6523 NumberOfCodeBlocks, 6519 NumberOfCodeBlocksAsserted, 313 NumberOfCheckSat, 6345 ConstructedInterpolants, 287 QuantifiedInterpolants, 147452 SizeOfPredicates, 596 NumberOfNonLiveVariables, 9635 ConjunctsInSsa, 3034 ConjunctsInUnsatCore, 178 InterpolantComputations, 8 PerfectInterpolantSequences, 222/2676 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