/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/send-receive-alt-tDQ.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 20:15:35,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 20:15:35,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 20:15:35,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 20:15:35,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 20:15:35,659 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 20:15:35,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 20:15:35,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 20:15:35,661 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 20:15:35,665 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 20:15:35,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 20:15:35,665 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 20:15:35,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 20:15:35,666 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 20:15:35,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 20:15:35,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 20:15:35,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 20:15:35,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 20:15:35,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 20:15:35,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 20:15:35,668 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 20:15:35,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 20:15:35,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 20:15:35,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 20:15:35,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 20:15:35,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 20:15:35,669 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 20:15:35,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 20:15:35,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:15:35,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 20:15:35,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 20:15:35,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 20:15:35,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 20:15:35,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 20:15:35,670 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 20:15:35,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 20:15:35,671 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 20:15:36,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 20:15:36,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 20:15:36,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 20:15:36,138 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 20:15:36,140 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 20:15:36,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/send-receive-alt-tDQ.wvr.bpl [2021-02-19 20:15:36,141 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/send-receive-alt-tDQ.wvr.bpl' [2021-02-19 20:15:36,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 20:15:36,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 20:15:36,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 20:15:36,208 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 20:15:36,208 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 20:15:36,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:15:36" (1/1) ... [2021-02-19 20:15:36,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:15:36" (1/1) ... [2021-02-19 20:15:36,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 20:15:36,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 20:15:36,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 20:15:36,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 20:15:36,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:15:36" (1/1) ... [2021-02-19 20:15:36,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:15:36" (1/1) ... [2021-02-19 20:15:36,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:15:36" (1/1) ... [2021-02-19 20:15:36,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:15:36" (1/1) ... [2021-02-19 20:15:36,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:15:36" (1/1) ... [2021-02-19 20:15:36,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:15:36" (1/1) ... [2021-02-19 20:15:36,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:15:36" (1/1) ... [2021-02-19 20:15:36,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 20:15:36,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 20:15:36,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 20:15:36,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 20:15:36,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:15:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:15:36,365 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 20:15:36,366 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 20:15:36,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 20:15:36,367 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 20:15:36,367 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 20:15:36,367 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 20:15:36,367 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 20:15:36,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 20:15:36,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 20:15:36,368 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 20:15:36,634 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 20:15:36,635 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-19 20:15:36,635 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-02-19 20:15:36,637 INFO L202 PluginConnector]: Adding new model send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:15:36 BoogieIcfgContainer [2021-02-19 20:15:36,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 20:15:36,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 20:15:36,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 20:15:36,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 20:15:36,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:15:36" (1/2) ... [2021-02-19 20:15:36,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de7048e and model type send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 08:15:36, skipping insertion in model container [2021-02-19 20:15:36,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:15:36" (2/2) ... [2021-02-19 20:15:36,650 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt-tDQ.wvr.bpl [2021-02-19 20:15:36,656 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 20:15:36,656 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 20:15:36,660 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 20:15:36,661 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 20:15:36,719 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 20:15:36,735 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 20:15:36,765 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 20:15:36,765 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 20:15:36,765 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 20:15:36,765 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 20:15:36,765 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 20:15:36,766 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 20:15:36,766 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 20:15:36,766 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 20:15:36,775 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 58 flow [2021-02-19 20:15:36,799 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 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) [2021-02-19 20:15:36,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 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) [2021-02-19 20:15:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 20:15:36,807 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:36,808 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:36,808 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:36,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1171557323, now seen corresponding path program 1 times [2021-02-19 20:15:36,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:36,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505613940] [2021-02-19 20:15:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:37,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505613940] [2021-02-19 20:15:37,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:15:37,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 20:15:37,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137701124] [2021-02-19 20:15:37,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 20:15:37,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:37,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 20:15:37,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:15:37,051 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:37,085 INFO L93 Difference]: Finished difference Result 42 states and 82 transitions. [2021-02-19 20:15:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 20:15:37,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-02-19 20:15:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:37,101 INFO L225 Difference]: With dead ends: 42 [2021-02-19 20:15:37,101 INFO L226 Difference]: Without dead ends: 30 [2021-02-19 20:15:37,103 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:15:37,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-19 20:15:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-02-19 20:15:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 57 transitions. [2021-02-19 20:15:37,148 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 57 transitions. Word has length 11 [2021-02-19 20:15:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:37,149 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 57 transitions. [2021-02-19 20:15:37,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 57 transitions. [2021-02-19 20:15:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 20:15:37,151 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:37,151 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:37,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 20:15:37,152 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:37,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:37,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1405662288, now seen corresponding path program 1 times [2021-02-19 20:15:37,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:37,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761416862] [2021-02-19 20:15:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:37,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761416862] [2021-02-19 20:15:37,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:15:37,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 20:15:37,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663080261] [2021-02-19 20:15:37,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 20:15:37,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:37,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 20:15:37,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:15:37,236 INFO L87 Difference]: Start difference. First operand 30 states and 57 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:37,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:37,258 INFO L93 Difference]: Finished difference Result 32 states and 57 transitions. [2021-02-19 20:15:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 20:15:37,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-02-19 20:15:37,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:37,261 INFO L225 Difference]: With dead ends: 32 [2021-02-19 20:15:37,261 INFO L226 Difference]: Without dead ends: 31 [2021-02-19 20:15:37,262 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:15:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-19 20:15:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-02-19 20:15:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2021-02-19 20:15:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2021-02-19 20:15:37,273 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 12 [2021-02-19 20:15:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:37,274 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2021-02-19 20:15:37,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2021-02-19 20:15:37,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 20:15:37,276 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:37,276 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:37,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 20:15:37,276 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:37,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:37,277 INFO L82 PathProgramCache]: Analyzing trace with hash -485158939, now seen corresponding path program 1 times [2021-02-19 20:15:37,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:37,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50556731] [2021-02-19 20:15:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:37,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50556731] [2021-02-19 20:15:37,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643839119] [2021-02-19 20:15:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:37,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 20:15:37,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:37,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-02-19 20:15:37,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:37,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:37,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:37,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2021-02-19 20:15:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:37,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:37,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-02-19 20:15:37,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137335928] [2021-02-19 20:15:37,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:15:37,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:37,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:15:37,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:15:37,701 INFO L87 Difference]: Start difference. First operand 31 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:37,789 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-02-19 20:15:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:15:37,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 20:15:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:37,791 INFO L225 Difference]: With dead ends: 52 [2021-02-19 20:15:37,791 INFO L226 Difference]: Without dead ends: 41 [2021-02-19 20:15:37,791 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:15:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-02-19 20:15:37,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-02-19 20:15:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-02-19 20:15:37,801 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 15 [2021-02-19 20:15:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:37,801 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-02-19 20:15:37,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-02-19 20:15:37,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 20:15:37,806 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:37,806 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:38,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 20:15:38,019 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:38,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:38,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1805840389, now seen corresponding path program 1 times [2021-02-19 20:15:38,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:38,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027744257] [2021-02-19 20:15:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:15:38,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027744257] [2021-02-19 20:15:38,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:15:38,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 20:15:38,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978451436] [2021-02-19 20:15:38,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 20:15:38,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:38,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 20:15:38,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:15:38,048 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:38,063 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-02-19 20:15:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 20:15:38,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 20:15:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:38,066 INFO L225 Difference]: With dead ends: 40 [2021-02-19 20:15:38,066 INFO L226 Difference]: Without dead ends: 40 [2021-02-19 20:15:38,066 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:15:38,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-02-19 20:15:38,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-02-19 20:15:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 65 transitions. [2021-02-19 20:15:38,071 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 65 transitions. Word has length 15 [2021-02-19 20:15:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:38,071 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 65 transitions. [2021-02-19 20:15:38,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2021-02-19 20:15:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-02-19 20:15:38,072 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:38,072 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:38,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 20:15:38,072 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:38,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1970093468, now seen corresponding path program 2 times [2021-02-19 20:15:38,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:38,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429976422] [2021-02-19 20:15:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:38,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429976422] [2021-02-19 20:15:38,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:15:38,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 20:15:38,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341023789] [2021-02-19 20:15:38,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:15:38,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:38,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:15:38,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:15:38,141 INFO L87 Difference]: Start difference. First operand 35 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:38,185 INFO L93 Difference]: Finished difference Result 86 states and 160 transitions. [2021-02-19 20:15:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:15:38,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-02-19 20:15:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:38,189 INFO L225 Difference]: With dead ends: 86 [2021-02-19 20:15:38,190 INFO L226 Difference]: Without dead ends: 84 [2021-02-19 20:15:38,190 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:15:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-19 20:15:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2021-02-19 20:15:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-02-19 20:15:38,198 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 16 [2021-02-19 20:15:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:38,198 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-02-19 20:15:38,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-02-19 20:15:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 20:15:38,202 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:38,202 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:38,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 20:15:38,203 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:38,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2054220691, now seen corresponding path program 3 times [2021-02-19 20:15:38,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:38,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094697985] [2021-02-19 20:15:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:15:38,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094697985] [2021-02-19 20:15:38,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624943148] [2021-02-19 20:15:38,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:38,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 20:15:38,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:38,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 20:15:38,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:15:38,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:38,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 20:15:38,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492829894] [2021-02-19 20:15:38,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 20:15:38,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:38,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 20:15:38,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:15:38,380 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-02-19 20:15:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:38,391 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-02-19 20:15:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:15:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 [2021-02-19 20:15:38,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:38,392 INFO L225 Difference]: With dead ends: 79 [2021-02-19 20:15:38,392 INFO L226 Difference]: Without dead ends: 79 [2021-02-19 20:15:38,393 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 20:15:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-19 20:15:38,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-02-19 20:15:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:38,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-02-19 20:15:38,400 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 19 [2021-02-19 20:15:38,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:38,400 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-02-19 20:15:38,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-02-19 20:15:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-02-19 20:15:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 20:15:38,401 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:38,401 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:38,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:38,638 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:38,639 INFO L82 PathProgramCache]: Analyzing trace with hash 236778637, now seen corresponding path program 1 times [2021-02-19 20:15:38,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:38,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070873191] [2021-02-19 20:15:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:38,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070873191] [2021-02-19 20:15:38,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135988515] [2021-02-19 20:15:38,815 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 [2021-02-19 20:15:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:38,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 20:15:38,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:39,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:39,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 19 [2021-02-19 20:15:39,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:39,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:39,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:39,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2021-02-19 20:15:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:39,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:39,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 20:15:39,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714712599] [2021-02-19 20:15:39,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:15:39,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:39,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:15:39,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:15:39,066 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:39,111 INFO L93 Difference]: Finished difference Result 106 states and 220 transitions. [2021-02-19 20:15:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:15:39,112 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 19 [2021-02-19 20:15:39,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:39,117 INFO L225 Difference]: With dead ends: 106 [2021-02-19 20:15:39,117 INFO L226 Difference]: Without dead ends: 89 [2021-02-19 20:15:39,118 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:15:39,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-02-19 20:15:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-02-19 20:15:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:39,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-02-19 20:15:39,133 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 19 [2021-02-19 20:15:39,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:39,133 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-02-19 20:15:39,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:39,134 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-02-19 20:15:39,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 20:15:39,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:39,135 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:39,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:39,341 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2133494851, now seen corresponding path program 2 times [2021-02-19 20:15:39,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:39,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871606905] [2021-02-19 20:15:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:39,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871606905] [2021-02-19 20:15:39,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747074034] [2021-02-19 20:15:39,472 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:15:39,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:15:39,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:39,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 20:15:39,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:39,655 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 20:15:39,656 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 37 treesize of output 19 [2021-02-19 20:15:39,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:39,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:39,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:39,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:7 [2021-02-19 20:15:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:39,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:39,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-02-19 20:15:39,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446057146] [2021-02-19 20:15:39,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:15:39,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:39,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:15:39,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:15:39,680 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-02-19 20:15:39,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:39,737 INFO L93 Difference]: Finished difference Result 111 states and 224 transitions. [2021-02-19 20:15:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:15:39,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 19 [2021-02-19 20:15:39,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:39,739 INFO L225 Difference]: With dead ends: 111 [2021-02-19 20:15:39,739 INFO L226 Difference]: Without dead ends: 96 [2021-02-19 20:15:39,739 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:15:39,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-19 20:15:39,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2021-02-19 20:15:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 163 transitions. [2021-02-19 20:15:39,746 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 163 transitions. Word has length 19 [2021-02-19 20:15:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:39,746 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 163 transitions. [2021-02-19 20:15:39,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-02-19 20:15:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 163 transitions. [2021-02-19 20:15:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 20:15:39,748 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:39,748 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:39,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:39,974 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:39,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:39,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1883679548, now seen corresponding path program 3 times [2021-02-19 20:15:39,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:39,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086081321] [2021-02-19 20:15:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:40,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086081321] [2021-02-19 20:15:40,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975739617] [2021-02-19 20:15:40,018 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:40,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 20:15:40,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 20:15:40,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:40,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:40,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 20:15:40,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976578504] [2021-02-19 20:15:40,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:15:40,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:40,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:15:40,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:15:40,127 INFO L87 Difference]: Start difference. First operand 82 states and 163 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:40,145 INFO L93 Difference]: Finished difference Result 178 states and 344 transitions. [2021-02-19 20:15:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:15:40,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 20 [2021-02-19 20:15:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:40,147 INFO L225 Difference]: With dead ends: 178 [2021-02-19 20:15:40,147 INFO L226 Difference]: Without dead ends: 175 [2021-02-19 20:15:40,148 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:15:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-02-19 20:15:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2021-02-19 20:15:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.090909090909091) internal successors, (207), 99 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 207 transitions. [2021-02-19 20:15:40,156 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 207 transitions. Word has length 20 [2021-02-19 20:15:40,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:40,156 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 207 transitions. [2021-02-19 20:15:40,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 207 transitions. [2021-02-19 20:15:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:15:40,157 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:40,157 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:40,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:40,382 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:40,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1799644437, now seen corresponding path program 4 times [2021-02-19 20:15:40,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:40,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741302521] [2021-02-19 20:15:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:40,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741302521] [2021-02-19 20:15:40,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683260568] [2021-02-19 20:15:40,576 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:15:40,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:15:40,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:40,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 20:15:40,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:40,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:40,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:40,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:40,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:40,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:40,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-02-19 20:15:40,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:40,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:40,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:40,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-02-19 20:15:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:40,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:40,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-02-19 20:15:40,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330470172] [2021-02-19 20:15:40,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 20:15:40,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:40,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 20:15:40,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:15:40,821 INFO L87 Difference]: Start difference. First operand 100 states and 207 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:40,959 INFO L93 Difference]: Finished difference Result 229 states and 467 transitions. [2021-02-19 20:15:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:15:40,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:15:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:40,961 INFO L225 Difference]: With dead ends: 229 [2021-02-19 20:15:40,961 INFO L226 Difference]: Without dead ends: 158 [2021-02-19 20:15:40,961 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:15:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-19 20:15:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2021-02-19 20:15:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.048780487804878) internal successors, (252), 123 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 252 transitions. [2021-02-19 20:15:40,968 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 252 transitions. Word has length 23 [2021-02-19 20:15:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:40,969 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 252 transitions. [2021-02-19 20:15:40,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 252 transitions. [2021-02-19 20:15:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:15:40,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:40,970 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:41,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:41,194 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:41,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:41,195 INFO L82 PathProgramCache]: Analyzing trace with hash -581132155, now seen corresponding path program 5 times [2021-02-19 20:15:41,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:41,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502219864] [2021-02-19 20:15:41,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:41,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502219864] [2021-02-19 20:15:41,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734099086] [2021-02-19 20:15:41,389 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:41,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:15:41,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:41,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 20:15:41,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:41,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:41,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:41,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:41,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:41,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:41,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:41,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:41,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:41,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:41,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-02-19 20:15:41,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:41,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:41,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:41,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:3 [2021-02-19 20:15:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:41,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:41,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 20:15:41,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568303778] [2021-02-19 20:15:41,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 20:15:41,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:41,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 20:15:41,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:15:41,705 INFO L87 Difference]: Start difference. First operand 124 states and 252 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:41,824 INFO L93 Difference]: Finished difference Result 242 states and 510 transitions. [2021-02-19 20:15:41,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:15:41,825 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:15:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:41,827 INFO L225 Difference]: With dead ends: 242 [2021-02-19 20:15:41,827 INFO L226 Difference]: Without dead ends: 207 [2021-02-19 20:15:41,827 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:15:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-02-19 20:15:41,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 127. [2021-02-19 20:15:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 126 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 258 transitions. [2021-02-19 20:15:41,834 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 258 transitions. Word has length 23 [2021-02-19 20:15:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:41,834 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 258 transitions. [2021-02-19 20:15:41,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 258 transitions. [2021-02-19 20:15:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:15:41,835 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:41,835 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:42,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:42,050 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:42,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:42,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1035350971, now seen corresponding path program 6 times [2021-02-19 20:15:42,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:42,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602511171] [2021-02-19 20:15:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:42,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602511171] [2021-02-19 20:15:42,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936192759] [2021-02-19 20:15:42,253 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:15:42,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:15:42,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:42,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 20:15:42,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:42,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:42,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:42,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:42,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:42,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:42,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-02-19 20:15:42,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:42,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:42,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:42,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-02-19 20:15:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:42,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:42,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-02-19 20:15:42,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550793664] [2021-02-19 20:15:42,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 20:15:42,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:42,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 20:15:42,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:15:42,473 INFO L87 Difference]: Start difference. First operand 127 states and 258 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:42,651 INFO L93 Difference]: Finished difference Result 370 states and 737 transitions. [2021-02-19 20:15:42,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:15:42,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:15:42,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:42,654 INFO L225 Difference]: With dead ends: 370 [2021-02-19 20:15:42,654 INFO L226 Difference]: Without dead ends: 231 [2021-02-19 20:15:42,654 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:15:42,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-02-19 20:15:42,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-02-19 20:15:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-02-19 20:15:42,663 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 23 [2021-02-19 20:15:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:42,664 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-02-19 20:15:42,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-02-19 20:15:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:15:42,670 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:42,670 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:42,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-02-19 20:15:42,894 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:42,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:42,895 INFO L82 PathProgramCache]: Analyzing trace with hash 878839733, now seen corresponding path program 7 times [2021-02-19 20:15:42,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:42,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810333089] [2021-02-19 20:15:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:43,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810333089] [2021-02-19 20:15:43,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040629656] [2021-02-19 20:15:43,030 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:43,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 20:15:43,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:43,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:43,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:43,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:43,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:43,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-02-19 20:15:43,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:43,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:43,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:43,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-02-19 20:15:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:43,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:43,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-02-19 20:15:43,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059876223] [2021-02-19 20:15:43,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 20:15:43,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:43,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 20:15:43,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:15:43,300 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:43,447 INFO L93 Difference]: Finished difference Result 296 states and 627 transitions. [2021-02-19 20:15:43,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 20:15:43,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:15:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:43,450 INFO L225 Difference]: With dead ends: 296 [2021-02-19 20:15:43,450 INFO L226 Difference]: Without dead ends: 244 [2021-02-19 20:15:43,451 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-02-19 20:15:43,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-02-19 20:15:43,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 115. [2021-02-19 20:15:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 114 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 234 transitions. [2021-02-19 20:15:43,456 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 234 transitions. Word has length 23 [2021-02-19 20:15:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:43,459 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 234 transitions. [2021-02-19 20:15:43,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 234 transitions. [2021-02-19 20:15:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:15:43,460 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:43,461 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:43,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:43,674 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:43,675 INFO L82 PathProgramCache]: Analyzing trace with hash 89209413, now seen corresponding path program 8 times [2021-02-19 20:15:43,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:43,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676580979] [2021-02-19 20:15:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:43,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676580979] [2021-02-19 20:15:43,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338207020] [2021-02-19 20:15:43,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:43,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:15:43,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:43,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 20:15:43,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:43,995 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-02-19 20:15:43,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 24 [2021-02-19 20:15:43,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:44,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:44,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:44,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:7 [2021-02-19 20:15:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:44,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:44,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-02-19 20:15:44,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257291242] [2021-02-19 20:15:44,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:15:44,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:44,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:15:44,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:15:44,032 INFO L87 Difference]: Start difference. First operand 115 states and 234 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:44,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:44,135 INFO L93 Difference]: Finished difference Result 174 states and 355 transitions. [2021-02-19 20:15:44,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:15:44,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:15:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:44,137 INFO L225 Difference]: With dead ends: 174 [2021-02-19 20:15:44,137 INFO L226 Difference]: Without dead ends: 159 [2021-02-19 20:15:44,137 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:15:44,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-02-19 20:15:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2021-02-19 20:15:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 121 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:44,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 249 transitions. [2021-02-19 20:15:44,142 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 249 transitions. Word has length 23 [2021-02-19 20:15:44,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:44,142 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 249 transitions. [2021-02-19 20:15:44,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:44,143 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 249 transitions. [2021-02-19 20:15:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-19 20:15:44,143 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:44,143 INFO L506 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:44,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:44,358 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:44,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:44,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1699324100, now seen corresponding path program 9 times [2021-02-19 20:15:44,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:44,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024106419] [2021-02-19 20:15:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:44,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024106419] [2021-02-19 20:15:44,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526767370] [2021-02-19 20:15:44,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:44,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:15:44,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:44,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 20:15:44,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:44,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:44,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 20:15:44,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468784073] [2021-02-19 20:15:44,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 20:15:44,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 20:15:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:15:44,505 INFO L87 Difference]: Start difference. First operand 122 states and 249 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:44,529 INFO L93 Difference]: Finished difference Result 258 states and 510 transitions. [2021-02-19 20:15:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 20:15:44,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-02-19 20:15:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:44,531 INFO L225 Difference]: With dead ends: 258 [2021-02-19 20:15:44,531 INFO L226 Difference]: Without dead ends: 254 [2021-02-19 20:15:44,532 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:15:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-02-19 20:15:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 144. [2021-02-19 20:15:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.104895104895105) internal successors, (301), 143 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 301 transitions. [2021-02-19 20:15:44,544 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 301 transitions. Word has length 24 [2021-02-19 20:15:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:44,544 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 301 transitions. [2021-02-19 20:15:44,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 301 transitions. [2021-02-19 20:15:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:15:44,545 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:44,545 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:44,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 20:15:44,758 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:44,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:44,758 INFO L82 PathProgramCache]: Analyzing trace with hash -2098514643, now seen corresponding path program 10 times [2021-02-19 20:15:44,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:44,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426567198] [2021-02-19 20:15:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:15:45,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426567198] [2021-02-19 20:15:45,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047344061] [2021-02-19 20:15:45,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:15:45,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:15:45,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:45,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 20:15:45,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:45,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:45,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:45,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:45,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:45,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:45,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:45,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:45,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:45,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:45,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:45,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-02-19 20:15:45,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:45,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:45,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:45,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-02-19 20:15:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:45,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:45,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-02-19 20:15:45,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438416801] [2021-02-19 20:15:45,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 20:15:45,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:45,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 20:15:45,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:15:45,406 INFO L87 Difference]: Start difference. First operand 144 states and 301 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:45,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:45,649 INFO L93 Difference]: Finished difference Result 412 states and 832 transitions. [2021-02-19 20:15:45,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:15:45,650 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:15:45,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:45,651 INFO L225 Difference]: With dead ends: 412 [2021-02-19 20:15:45,652 INFO L226 Difference]: Without dead ends: 275 [2021-02-19 20:15:45,652 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-02-19 20:15:45,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-02-19 20:15:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-02-19 20:15:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.0324324324324325) internal successors, (376), 185 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 376 transitions. [2021-02-19 20:15:45,658 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 376 transitions. Word has length 27 [2021-02-19 20:15:45,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:45,659 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 376 transitions. [2021-02-19 20:15:45,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 376 transitions. [2021-02-19 20:15:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:15:45,659 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:45,660 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:45,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 20:15:45,882 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash -173820835, now seen corresponding path program 11 times [2021-02-19 20:15:45,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:45,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242748756] [2021-02-19 20:15:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:46,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242748756] [2021-02-19 20:15:46,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663621534] [2021-02-19 20:15:46,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:46,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 20:15:46,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:46,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 20:15:46,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:46,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:46,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:46,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:46,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:46,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:46,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:46,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:46,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:46,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:46,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:46,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:46,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-02-19 20:15:46,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:46,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:46,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:46,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-02-19 20:15:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:46,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:46,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-02-19 20:15:46,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961199940] [2021-02-19 20:15:46,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 20:15:46,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:46,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 20:15:46,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:15:46,455 INFO L87 Difference]: Start difference. First operand 186 states and 376 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:46,623 INFO L93 Difference]: Finished difference Result 449 states and 948 transitions. [2021-02-19 20:15:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 20:15:46,624 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:15:46,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:46,626 INFO L225 Difference]: With dead ends: 449 [2021-02-19 20:15:46,626 INFO L226 Difference]: Without dead ends: 397 [2021-02-19 20:15:46,626 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:15:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-02-19 20:15:46,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 204. [2021-02-19 20:15:46,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-02-19 20:15:46,635 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-02-19 20:15:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:46,635 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-02-19 20:15:46,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-02-19 20:15:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:15:46,637 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:46,637 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:46,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 20:15:46,858 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:46,858 INFO L82 PathProgramCache]: Analyzing trace with hash -637854931, now seen corresponding path program 12 times [2021-02-19 20:15:46,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:46,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887567228] [2021-02-19 20:15:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:47,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887567228] [2021-02-19 20:15:47,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473561040] [2021-02-19 20:15:47,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:47,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:15:47,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:47,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 20:15:47,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:47,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:47,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:47,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:47,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:47,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:47,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:47,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:47,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:47,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:47,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:47,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:47,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:47,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-02-19 20:15:47,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:47,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:47,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:47,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-02-19 20:15:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:47,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:47,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-02-19 20:15:47,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105362127] [2021-02-19 20:15:47,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 20:15:47,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:47,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 20:15:47,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:15:47,380 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:47,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:47,574 INFO L93 Difference]: Finished difference Result 574 states and 1177 transitions. [2021-02-19 20:15:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:15:47,575 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:15:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:47,577 INFO L225 Difference]: With dead ends: 574 [2021-02-19 20:15:47,577 INFO L226 Difference]: Without dead ends: 426 [2021-02-19 20:15:47,578 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:15:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-02-19 20:15:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 210. [2021-02-19 20:15:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.028708133971292) internal successors, (424), 209 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 424 transitions. [2021-02-19 20:15:47,589 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 424 transitions. Word has length 27 [2021-02-19 20:15:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:47,589 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 424 transitions. [2021-02-19 20:15:47,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 424 transitions. [2021-02-19 20:15:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:15:47,590 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:47,590 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:47,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:47,806 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:47,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:47,806 INFO L82 PathProgramCache]: Analyzing trace with hash 2106164317, now seen corresponding path program 13 times [2021-02-19 20:15:47,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:47,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683188827] [2021-02-19 20:15:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:47,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683188827] [2021-02-19 20:15:47,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222080533] [2021-02-19 20:15:47,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:48,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 20:15:48,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:48,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:48,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:48,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:48,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:48,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:48,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:48,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:48,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:48,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:48,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-02-19 20:15:48,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:48,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:48,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:48,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-02-19 20:15:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:48,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:48,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-02-19 20:15:48,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320822391] [2021-02-19 20:15:48,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 20:15:48,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:48,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 20:15:48,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:15:48,292 INFO L87 Difference]: Start difference. First operand 210 states and 424 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:48,561 INFO L93 Difference]: Finished difference Result 644 states and 1282 transitions. [2021-02-19 20:15:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:15:48,562 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:15:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:48,564 INFO L225 Difference]: With dead ends: 644 [2021-02-19 20:15:48,564 INFO L226 Difference]: Without dead ends: 480 [2021-02-19 20:15:48,564 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 20:15:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-02-19 20:15:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 282. [2021-02-19 20:15:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.9715302491103204) internal successors, (554), 281 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 554 transitions. [2021-02-19 20:15:48,575 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 554 transitions. Word has length 27 [2021-02-19 20:15:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:48,576 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 554 transitions. [2021-02-19 20:15:48,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 554 transitions. [2021-02-19 20:15:48,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:15:48,577 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:48,577 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:48,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:48,794 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:48,794 INFO L82 PathProgramCache]: Analyzing trace with hash -728143267, now seen corresponding path program 14 times [2021-02-19 20:15:48,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:48,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649138443] [2021-02-19 20:15:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:48,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649138443] [2021-02-19 20:15:48,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649617000] [2021-02-19 20:15:48,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:48,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:15:48,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:48,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 20:15:48,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:49,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:49,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:49,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:49,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:49,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:49,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:49,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:49,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 31 [2021-02-19 20:15:49,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:49,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:49,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:49,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:87, output treesize:7 [2021-02-19 20:15:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:49,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:49,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-02-19 20:15:49,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64559829] [2021-02-19 20:15:49,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 20:15:49,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:49,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 20:15:49,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:15:49,275 INFO L87 Difference]: Start difference. First operand 282 states and 554 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2021-02-19 20:15:49,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:49,459 INFO L93 Difference]: Finished difference Result 587 states and 1189 transitions. [2021-02-19 20:15:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 20:15:49,459 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 27 [2021-02-19 20:15:49,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:49,462 INFO L225 Difference]: With dead ends: 587 [2021-02-19 20:15:49,462 INFO L226 Difference]: Without dead ends: 535 [2021-02-19 20:15:49,463 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-02-19 20:15:49,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-02-19 20:15:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 315. [2021-02-19 20:15:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.9585987261146496) internal successors, (615), 314 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 615 transitions. [2021-02-19 20:15:49,473 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 615 transitions. Word has length 27 [2021-02-19 20:15:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:49,474 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 615 transitions. [2021-02-19 20:15:49,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2021-02-19 20:15:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 615 transitions. [2021-02-19 20:15:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:15:49,475 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:49,475 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:49,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:49,694 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:49,694 INFO L82 PathProgramCache]: Analyzing trace with hash 125628141, now seen corresponding path program 15 times [2021-02-19 20:15:49,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:49,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101807113] [2021-02-19 20:15:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:49,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101807113] [2021-02-19 20:15:49,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698332381] [2021-02-19 20:15:49,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:49,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:15:49,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:49,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 20:15:49,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:50,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:50,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:50,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:50,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:50,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:50,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:50,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:50,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:50,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:50,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:50,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:50,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:50,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 31 [2021-02-19 20:15:50,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:50,325 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-02-19 20:15:50,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:50,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:88, output treesize:7 [2021-02-19 20:15:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:50,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:50,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-02-19 20:15:50,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985819319] [2021-02-19 20:15:50,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 20:15:50,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:50,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 20:15:50,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:15:50,355 INFO L87 Difference]: Start difference. First operand 315 states and 615 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:51,003 INFO L93 Difference]: Finished difference Result 649 states and 1285 transitions. [2021-02-19 20:15:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 20:15:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:15:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:51,007 INFO L225 Difference]: With dead ends: 649 [2021-02-19 20:15:51,007 INFO L226 Difference]: Without dead ends: 531 [2021-02-19 20:15:51,007 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:15:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-02-19 20:15:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 345. [2021-02-19 20:15:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.9563953488372092) internal successors, (673), 344 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 673 transitions. [2021-02-19 20:15:51,019 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 673 transitions. Word has length 27 [2021-02-19 20:15:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:51,019 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 673 transitions. [2021-02-19 20:15:51,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:51,019 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 673 transitions. [2021-02-19 20:15:51,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:15:51,020 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:51,020 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:51,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 20:15:51,246 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:51,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:51,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1586287853, now seen corresponding path program 16 times [2021-02-19 20:15:51,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:51,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790286214] [2021-02-19 20:15:51,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:51,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790286214] [2021-02-19 20:15:51,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79526932] [2021-02-19 20:15:51,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:51,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:15:51,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:51,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 20:15:51,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:51,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:51,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:51,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:51,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:51,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:51,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:51,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:51,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:51,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-02-19 20:15:51,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:51,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:51,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:51,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-02-19 20:15:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:51,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:51,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-02-19 20:15:51,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209001082] [2021-02-19 20:15:51,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 20:15:51,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:51,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 20:15:51,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:15:51,691 INFO L87 Difference]: Start difference. First operand 345 states and 673 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:51,865 INFO L93 Difference]: Finished difference Result 655 states and 1326 transitions. [2021-02-19 20:15:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 20:15:51,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:15:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:51,867 INFO L225 Difference]: With dead ends: 655 [2021-02-19 20:15:51,867 INFO L226 Difference]: Without dead ends: 603 [2021-02-19 20:15:51,869 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:15:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-02-19 20:15:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 345. [2021-02-19 20:15:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.9563953488372092) internal successors, (673), 344 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 673 transitions. [2021-02-19 20:15:51,878 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 673 transitions. Word has length 27 [2021-02-19 20:15:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:51,879 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 673 transitions. [2021-02-19 20:15:51,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 673 transitions. [2021-02-19 20:15:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:15:51,880 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:51,880 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:52,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 20:15:52,102 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash 86132765, now seen corresponding path program 17 times [2021-02-19 20:15:52,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:52,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526430824] [2021-02-19 20:15:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:52,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526430824] [2021-02-19 20:15:52,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253136621] [2021-02-19 20:15:52,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:52,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:15:52,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:52,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:15:52,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:52,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:52,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:52,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:52,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:52,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:52,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:52,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:52,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:52,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:52,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:52,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:52,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:52,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:52,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:52,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:52,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:52,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 24 [2021-02-19 20:15:52,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:52,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:52,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:52,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:3 [2021-02-19 20:15:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:52,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:52,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 20:15:52,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856098190] [2021-02-19 20:15:52,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:15:52,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:52,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:15:52,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:15:52,693 INFO L87 Difference]: Start difference. First operand 345 states and 673 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-02-19 20:15:53,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:53,280 INFO L93 Difference]: Finished difference Result 678 states and 1330 transitions. [2021-02-19 20:15:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 20:15:53,281 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 27 [2021-02-19 20:15:53,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:53,283 INFO L225 Difference]: With dead ends: 678 [2021-02-19 20:15:53,283 INFO L226 Difference]: Without dead ends: 521 [2021-02-19 20:15:53,283 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-02-19 20:15:53,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-02-19 20:15:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 379. [2021-02-19 20:15:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.962962962962963) internal successors, (742), 378 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 742 transitions. [2021-02-19 20:15:53,296 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 742 transitions. Word has length 27 [2021-02-19 20:15:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:53,296 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 742 transitions. [2021-02-19 20:15:53,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-02-19 20:15:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 742 transitions. [2021-02-19 20:15:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:15:53,297 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:53,297 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:53,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 20:15:53,518 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:53,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1949327221, now seen corresponding path program 18 times [2021-02-19 20:15:53,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:53,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576216511] [2021-02-19 20:15:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:53,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576216511] [2021-02-19 20:15:53,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904918674] [2021-02-19 20:15:53,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:53,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:15:53,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:53,747 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:15:53,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:54,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:54,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:54,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:54,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:54,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 20:15:54,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:54,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:54,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:54,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 20:15:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:54,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:54,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-02-19 20:15:54,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002884453] [2021-02-19 20:15:54,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:15:54,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:54,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:15:54,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:15:54,178 INFO L87 Difference]: Start difference. First operand 379 states and 742 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:54,430 INFO L93 Difference]: Finished difference Result 702 states and 1414 transitions. [2021-02-19 20:15:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:15:54,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:15:54,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:54,434 INFO L225 Difference]: With dead ends: 702 [2021-02-19 20:15:54,434 INFO L226 Difference]: Without dead ends: 665 [2021-02-19 20:15:54,434 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:15:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-02-19 20:15:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 388. [2021-02-19 20:15:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.9560723514211886) internal successors, (757), 387 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 757 transitions. [2021-02-19 20:15:54,446 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 757 transitions. Word has length 31 [2021-02-19 20:15:54,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:54,446 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 757 transitions. [2021-02-19 20:15:54,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 757 transitions. [2021-02-19 20:15:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:15:54,447 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:54,447 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:54,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 20:15:54,673 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:54,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1362707227, now seen corresponding path program 19 times [2021-02-19 20:15:54,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:54,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163234389] [2021-02-19 20:15:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:54,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163234389] [2021-02-19 20:15:54,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368222206] [2021-02-19 20:15:54,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:54,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:15:54,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:55,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:55,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:55,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:55,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 20:15:55,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:55,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:55,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:55,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 20:15:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:55,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:55,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-02-19 20:15:55,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853702135] [2021-02-19 20:15:55,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 20:15:55,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 20:15:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-02-19 20:15:55,290 INFO L87 Difference]: Start difference. First operand 388 states and 757 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:55,537 INFO L93 Difference]: Finished difference Result 586 states and 1161 transitions. [2021-02-19 20:15:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:15:55,537 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:15:55,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:55,540 INFO L225 Difference]: With dead ends: 586 [2021-02-19 20:15:55,540 INFO L226 Difference]: Without dead ends: 559 [2021-02-19 20:15:55,540 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-02-19 20:15:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-02-19 20:15:55,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 356. [2021-02-19 20:15:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.9492957746478874) internal successors, (692), 355 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 692 transitions. [2021-02-19 20:15:55,551 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 692 transitions. Word has length 31 [2021-02-19 20:15:55,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:55,566 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 692 transitions. [2021-02-19 20:15:55,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 692 transitions. [2021-02-19 20:15:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:15:55,567 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:55,567 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:55,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 20:15:55,786 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:55,787 INFO L82 PathProgramCache]: Analyzing trace with hash -238146843, now seen corresponding path program 20 times [2021-02-19 20:15:55,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:55,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543698320] [2021-02-19 20:15:55,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:55,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543698320] [2021-02-19 20:15:55,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596153740] [2021-02-19 20:15:55,991 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:56,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:15:56,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:56,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 20:15:56,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:56,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:56,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:56,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:56,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:56,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:56,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 36 [2021-02-19 20:15:56,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:56,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:56,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:56,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:104, output treesize:7 [2021-02-19 20:15:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:56,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:56,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-02-19 20:15:56,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94747977] [2021-02-19 20:15:56,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:15:56,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:56,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:15:56,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:15:56,426 INFO L87 Difference]: Start difference. First operand 356 states and 692 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:56,631 INFO L93 Difference]: Finished difference Result 757 states and 1546 transitions. [2021-02-19 20:15:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:15:56,631 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:15:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:56,634 INFO L225 Difference]: With dead ends: 757 [2021-02-19 20:15:56,634 INFO L226 Difference]: Without dead ends: 699 [2021-02-19 20:15:56,634 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:15:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-02-19 20:15:56,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 311. [2021-02-19 20:15:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.9903225806451612) internal successors, (617), 310 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 617 transitions. [2021-02-19 20:15:56,644 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 617 transitions. Word has length 31 [2021-02-19 20:15:56,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:56,644 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 617 transitions. [2021-02-19 20:15:56,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:56,644 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 617 transitions. [2021-02-19 20:15:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:15:56,645 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:56,645 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:56,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:56,858 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:56,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:56,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1434028251, now seen corresponding path program 21 times [2021-02-19 20:15:56,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:56,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103366292] [2021-02-19 20:15:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 20:15:57,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103366292] [2021-02-19 20:15:57,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392556720] [2021-02-19 20:15:57,065 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:15:57,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 20:15:57,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:57,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:15:57,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:57,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:57,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:57,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:57,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:57,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 20:15:57,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:57,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:57,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:57,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 20:15:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:57,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:57,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-02-19 20:15:57,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501060740] [2021-02-19 20:15:57,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:15:57,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:57,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:15:57,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:15:57,500 INFO L87 Difference]: Start difference. First operand 311 states and 617 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-02-19 20:15:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:57,814 INFO L93 Difference]: Finished difference Result 830 states and 1671 transitions. [2021-02-19 20:15:57,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 20:15:57,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 31 [2021-02-19 20:15:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:57,816 INFO L225 Difference]: With dead ends: 830 [2021-02-19 20:15:57,816 INFO L226 Difference]: Without dead ends: 611 [2021-02-19 20:15:57,817 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-02-19 20:15:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-02-19 20:15:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 338. [2021-02-19 20:15:57,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.9732937685459941) internal successors, (665), 337 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 665 transitions. [2021-02-19 20:15:57,825 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 665 transitions. Word has length 31 [2021-02-19 20:15:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:57,826 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 665 transitions. [2021-02-19 20:15:57,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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) [2021-02-19 20:15:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 665 transitions. [2021-02-19 20:15:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:15:57,826 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:57,827 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:58,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 20:15:58,041 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:58,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:58,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2071308725, now seen corresponding path program 22 times [2021-02-19 20:15:58,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:58,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910652895] [2021-02-19 20:15:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:58,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910652895] [2021-02-19 20:15:58,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425483468] [2021-02-19 20:15:58,291 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:58,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:15:58,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:58,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:15:58,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:58,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:58,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:58,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:58,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:58,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:58,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 20:15:58,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:58,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:58,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:58,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 20:15:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:58,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:58,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-02-19 20:15:58,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963126992] [2021-02-19 20:15:58,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 20:15:58,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:58,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 20:15:58,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-02-19 20:15:58,731 INFO L87 Difference]: Start difference. First operand 338 states and 665 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:59,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:15:59,102 INFO L93 Difference]: Finished difference Result 718 states and 1477 transitions. [2021-02-19 20:15:59,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:15:59,102 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:15:59,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:15:59,104 INFO L225 Difference]: With dead ends: 718 [2021-02-19 20:15:59,104 INFO L226 Difference]: Without dead ends: 660 [2021-02-19 20:15:59,105 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-02-19 20:15:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-02-19 20:15:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 302. [2021-02-19 20:15:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.009966777408638) internal successors, (605), 301 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 605 transitions. [2021-02-19 20:15:59,112 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 605 transitions. Word has length 31 [2021-02-19 20:15:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:15:59,112 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 605 transitions. [2021-02-19 20:15:59,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:15:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 605 transitions. [2021-02-19 20:15:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:15:59,113 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:15:59,113 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:15:59,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:59,318 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:15:59,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:15:59,318 INFO L82 PathProgramCache]: Analyzing trace with hash -932394715, now seen corresponding path program 23 times [2021-02-19 20:15:59,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:15:59,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272077879] [2021-02-19 20:15:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:15:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:15:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:59,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272077879] [2021-02-19 20:15:59,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810793822] [2021-02-19 20:15:59,536 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:15:59,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 20:15:59,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:15:59,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:15:59,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:15:59,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:59,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:59,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:15:59,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:59,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:15:59,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 20:15:59,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:15:59,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:15:59,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:15:59,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:98, output treesize:7 [2021-02-19 20:15:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:15:59,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:15:59,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-02-19 20:15:59,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715866505] [2021-02-19 20:15:59,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:15:59,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:15:59,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:15:59,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:15:59,961 INFO L87 Difference]: Start difference. First operand 302 states and 605 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2021-02-19 20:16:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:00,238 INFO L93 Difference]: Finished difference Result 447 states and 899 transitions. [2021-02-19 20:16:00,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:16:00,238 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 31 [2021-02-19 20:16:00,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:00,239 INFO L225 Difference]: With dead ends: 447 [2021-02-19 20:16:00,240 INFO L226 Difference]: Without dead ends: 432 [2021-02-19 20:16:00,240 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:16:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-02-19 20:16:00,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 320. [2021-02-19 20:16:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.9905956112852665) internal successors, (635), 319 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 635 transitions. [2021-02-19 20:16:00,245 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 635 transitions. Word has length 31 [2021-02-19 20:16:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:00,245 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 635 transitions. [2021-02-19 20:16:00,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2021-02-19 20:16:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 635 transitions. [2021-02-19 20:16:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:16:00,246 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:00,246 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:00,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 20:16:00,458 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:00,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:00,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1611661227, now seen corresponding path program 24 times [2021-02-19 20:16:00,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:00,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71831841] [2021-02-19 20:16:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:00,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71831841] [2021-02-19 20:16:00,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151986336] [2021-02-19 20:16:00,664 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:00,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 20:16:00,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:00,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 20:16:00,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:01,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:01,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:01,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:01,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:01,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 36 [2021-02-19 20:16:01,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:01,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:01,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:01,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:7 [2021-02-19 20:16:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:01,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:01,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-02-19 20:16:01,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386695223] [2021-02-19 20:16:01,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:16:01,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:01,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:16:01,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:16:01,122 INFO L87 Difference]: Start difference. First operand 320 states and 635 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:01,404 INFO L93 Difference]: Finished difference Result 626 states and 1268 transitions. [2021-02-19 20:16:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 20:16:01,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:16:01,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:01,407 INFO L225 Difference]: With dead ends: 626 [2021-02-19 20:16:01,407 INFO L226 Difference]: Without dead ends: 581 [2021-02-19 20:16:01,407 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-19 20:16:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-02-19 20:16:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 260. [2021-02-19 20:16:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.0463320463320462) internal successors, (530), 259 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 530 transitions. [2021-02-19 20:16:01,415 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 530 transitions. Word has length 31 [2021-02-19 20:16:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:01,415 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 530 transitions. [2021-02-19 20:16:01,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 530 transitions. [2021-02-19 20:16:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:16:01,416 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:01,416 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:01,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:01,642 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1700802421, now seen corresponding path program 25 times [2021-02-19 20:16:01,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:01,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586551110] [2021-02-19 20:16:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:01,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586551110] [2021-02-19 20:16:01,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216189030] [2021-02-19 20:16:01,894 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:01,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:16:01,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:02,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:02,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:02,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:02,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 20:16:02,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:02,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:02,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:02,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 20:16:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:02,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:02,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-02-19 20:16:02,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500989069] [2021-02-19 20:16:02,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 20:16:02,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:02,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 20:16:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 20:16:02,280 INFO L87 Difference]: Start difference. First operand 260 states and 530 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:02,716 INFO L93 Difference]: Finished difference Result 731 states and 1447 transitions. [2021-02-19 20:16:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 20:16:02,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:16:02,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:02,719 INFO L225 Difference]: With dead ends: 731 [2021-02-19 20:16:02,719 INFO L226 Difference]: Without dead ends: 517 [2021-02-19 20:16:02,719 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:16:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-02-19 20:16:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 307. [2021-02-19 20:16:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.9934640522875817) internal successors, (610), 306 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 610 transitions. [2021-02-19 20:16:02,728 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 610 transitions. Word has length 31 [2021-02-19 20:16:02,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:02,728 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 610 transitions. [2021-02-19 20:16:02,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 610 transitions. [2021-02-19 20:16:02,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:16:02,729 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:02,729 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:02,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 20:16:02,938 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:02,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1175262581, now seen corresponding path program 26 times [2021-02-19 20:16:02,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:02,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286351201] [2021-02-19 20:16:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:03,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286351201] [2021-02-19 20:16:03,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325298328] [2021-02-19 20:16:03,189 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:03,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:16:03,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:03,223 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:16:03,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:03,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:03,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:03,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:03,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:03,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:03,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:03,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:03,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:03,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:03,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:03,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:03,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:03,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:03,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 20:16:03,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:03,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:03,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:03,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 20:16:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:03,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:03,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-02-19 20:16:03,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844146103] [2021-02-19 20:16:03,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 20:16:03,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:03,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 20:16:03,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 20:16:03,563 INFO L87 Difference]: Start difference. First operand 307 states and 610 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:03,925 INFO L93 Difference]: Finished difference Result 683 states and 1318 transitions. [2021-02-19 20:16:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 20:16:03,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:16:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:03,927 INFO L225 Difference]: With dead ends: 683 [2021-02-19 20:16:03,927 INFO L226 Difference]: Without dead ends: 457 [2021-02-19 20:16:03,928 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:16:03,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-02-19 20:16:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 215. [2021-02-19 20:16:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.8925233644859814) internal successors, (405), 214 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 405 transitions. [2021-02-19 20:16:03,934 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 405 transitions. Word has length 31 [2021-02-19 20:16:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:03,934 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 405 transitions. [2021-02-19 20:16:03,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 405 transitions. [2021-02-19 20:16:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:16:03,934 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:03,935 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:04,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:04,150 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:04,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:04,150 INFO L82 PathProgramCache]: Analyzing trace with hash -703880475, now seen corresponding path program 27 times [2021-02-19 20:16:04,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:04,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223920015] [2021-02-19 20:16:04,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:04,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223920015] [2021-02-19 20:16:04,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555630138] [2021-02-19 20:16:04,380 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:04,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 20:16:04,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:04,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:16:04,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:04,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:04,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:04,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:04,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 20:16:04,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:04,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:04,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:04,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 20:16:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:04,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:04,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-02-19 20:16:04,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867152403] [2021-02-19 20:16:04,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 20:16:04,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:04,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 20:16:04,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-02-19 20:16:04,779 INFO L87 Difference]: Start difference. First operand 215 states and 405 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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) [2021-02-19 20:16:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:05,028 INFO L93 Difference]: Finished difference Result 523 states and 1040 transitions. [2021-02-19 20:16:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:16:05,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 31 [2021-02-19 20:16:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:05,030 INFO L225 Difference]: With dead ends: 523 [2021-02-19 20:16:05,030 INFO L226 Difference]: Without dead ends: 448 [2021-02-19 20:16:05,030 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:16:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-02-19 20:16:05,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 227. [2021-02-19 20:16:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.8982300884955752) internal successors, (429), 226 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 429 transitions. [2021-02-19 20:16:05,036 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 429 transitions. Word has length 31 [2021-02-19 20:16:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:05,036 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 429 transitions. [2021-02-19 20:16:05,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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) [2021-02-19 20:16:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 429 transitions. [2021-02-19 20:16:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:16:05,037 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:05,037 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:05,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 20:16:05,250 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:05,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:05,250 INFO L82 PathProgramCache]: Analyzing trace with hash -246058843, now seen corresponding path program 28 times [2021-02-19 20:16:05,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:05,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362396384] [2021-02-19 20:16:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:05,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362396384] [2021-02-19 20:16:05,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866273265] [2021-02-19 20:16:05,465 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:05,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:16:05,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:05,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:16:05,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:05,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:05,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:05,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:05,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:05,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:05,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:05,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:05,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:05,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:05,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:05,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 20:16:05,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:05,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:05,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:05,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 20:16:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:05,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:05,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-02-19 20:16:05,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761182666] [2021-02-19 20:16:05,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 20:16:05,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:05,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 20:16:05,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:16:05,773 INFO L87 Difference]: Start difference. First operand 227 states and 429 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:06,234 INFO L93 Difference]: Finished difference Result 657 states and 1272 transitions. [2021-02-19 20:16:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 20:16:06,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:16:06,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:06,236 INFO L225 Difference]: With dead ends: 657 [2021-02-19 20:16:06,236 INFO L226 Difference]: Without dead ends: 452 [2021-02-19 20:16:06,236 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:16:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-02-19 20:16:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 279. [2021-02-19 20:16:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.881294964028777) internal successors, (523), 278 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 523 transitions. [2021-02-19 20:16:06,242 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 523 transitions. Word has length 31 [2021-02-19 20:16:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:06,242 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 523 transitions. [2021-02-19 20:16:06,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 523 transitions. [2021-02-19 20:16:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:16:06,243 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:06,243 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:06,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:06,458 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:06,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:06,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1668131861, now seen corresponding path program 29 times [2021-02-19 20:16:06,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:06,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702180228] [2021-02-19 20:16:06,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:06,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702180228] [2021-02-19 20:16:06,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56155616] [2021-02-19 20:16:06,654 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:06,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 20:16:06,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:06,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 20:16:06,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:06,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:06,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:06,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:06,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:06,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:06,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:06,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:06,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:06,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:06,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:06,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:06,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 36 [2021-02-19 20:16:06,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:06,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:06,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:06,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:7 [2021-02-19 20:16:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:06,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:06,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-02-19 20:16:06,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764694133] [2021-02-19 20:16:06,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 20:16:06,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:06,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 20:16:06,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:16:06,971 INFO L87 Difference]: Start difference. First operand 279 states and 523 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:07,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:07,164 INFO L93 Difference]: Finished difference Result 757 states and 1469 transitions. [2021-02-19 20:16:07,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:16:07,164 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:16:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:07,166 INFO L225 Difference]: With dead ends: 757 [2021-02-19 20:16:07,166 INFO L226 Difference]: Without dead ends: 586 [2021-02-19 20:16:07,167 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 20:16:07,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-02-19 20:16:07,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 288. [2021-02-19 20:16:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.8850174216027875) internal successors, (541), 287 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 541 transitions. [2021-02-19 20:16:07,172 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 541 transitions. Word has length 31 [2021-02-19 20:16:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:07,172 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 541 transitions. [2021-02-19 20:16:07,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 541 transitions. [2021-02-19 20:16:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:16:07,173 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:07,173 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:07,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 20:16:07,374 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:07,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:07,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2125201899, now seen corresponding path program 30 times [2021-02-19 20:16:07,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:07,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140936743] [2021-02-19 20:16:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:07,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140936743] [2021-02-19 20:16:07,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757526328] [2021-02-19 20:16:07,601 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:07,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 20:16:07,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:07,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:16:07,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:07,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:07,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:07,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:07,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:07,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:07,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:07,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:07,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:07,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:07,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:07,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:07,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 20:16:07,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:07,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:07,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:07,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-02-19 20:16:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:07,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:07,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-02-19 20:16:07,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678928274] [2021-02-19 20:16:07,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 20:16:07,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:07,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 20:16:07,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 20:16:07,985 INFO L87 Difference]: Start difference. First operand 288 states and 541 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:08,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:08,250 INFO L93 Difference]: Finished difference Result 615 states and 1219 transitions. [2021-02-19 20:16:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:16:08,251 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:16:08,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:08,252 INFO L225 Difference]: With dead ends: 615 [2021-02-19 20:16:08,253 INFO L226 Difference]: Without dead ends: 570 [2021-02-19 20:16:08,253 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-02-19 20:16:08,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-02-19 20:16:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 309. [2021-02-19 20:16:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.896103896103896) internal successors, (584), 308 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 584 transitions. [2021-02-19 20:16:08,260 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 584 transitions. Word has length 31 [2021-02-19 20:16:08,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:08,261 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 584 transitions. [2021-02-19 20:16:08,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 584 transitions. [2021-02-19 20:16:08,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:16:08,262 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:08,262 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:08,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 20:16:08,476 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:08,477 INFO L82 PathProgramCache]: Analyzing trace with hash -750728027, now seen corresponding path program 31 times [2021-02-19 20:16:08,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:08,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269875408] [2021-02-19 20:16:08,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:08,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269875408] [2021-02-19 20:16:08,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377909086] [2021-02-19 20:16:08,715 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:16:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:08,743 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 20:16:08,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:08,986 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-02-19 20:16:08,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 36 [2021-02-19 20:16:08,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:08,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:08,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:08,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-02-19 20:16:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:09,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:09,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-02-19 20:16:09,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140047135] [2021-02-19 20:16:09,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 20:16:09,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:09,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 20:16:09,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:16:09,010 INFO L87 Difference]: Start difference. First operand 309 states and 584 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:09,274 INFO L93 Difference]: Finished difference Result 479 states and 931 transitions. [2021-02-19 20:16:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 20:16:09,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:16:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:09,276 INFO L225 Difference]: With dead ends: 479 [2021-02-19 20:16:09,276 INFO L226 Difference]: Without dead ends: 464 [2021-02-19 20:16:09,276 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 20:16:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-02-19 20:16:09,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 316. [2021-02-19 20:16:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.9015873015873015) internal successors, (599), 315 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 599 transitions. [2021-02-19 20:16:09,283 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 599 transitions. Word has length 31 [2021-02-19 20:16:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:09,283 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 599 transitions. [2021-02-19 20:16:09,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 599 transitions. [2021-02-19 20:16:09,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 20:16:09,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:09,284 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:09,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 20:16:09,502 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:09,502 INFO L82 PathProgramCache]: Analyzing trace with hash 990686300, now seen corresponding path program 32 times [2021-02-19 20:16:09,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:09,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164448446] [2021-02-19 20:16:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:16:09,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164448446] [2021-02-19 20:16:09,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212897146] [2021-02-19 20:16:09,544 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:09,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:16:09,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:09,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:16:09,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 20:16:09,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:09,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 20:16:09,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105938924] [2021-02-19 20:16:09,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:16:09,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:09,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:16:09,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:16:09,637 INFO L87 Difference]: Start difference. First operand 316 states and 599 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:09,666 INFO L93 Difference]: Finished difference Result 526 states and 1018 transitions. [2021-02-19 20:16:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 20:16:09,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 20:16:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:09,669 INFO L225 Difference]: With dead ends: 526 [2021-02-19 20:16:09,669 INFO L226 Difference]: Without dead ends: 521 [2021-02-19 20:16:09,669 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:16:09,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-02-19 20:16:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 436. [2021-02-19 20:16:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.0114942528735633) internal successors, (875), 435 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 875 transitions. [2021-02-19 20:16:09,678 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 875 transitions. Word has length 32 [2021-02-19 20:16:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:09,679 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 875 transitions. [2021-02-19 20:16:09,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 875 transitions. [2021-02-19 20:16:09,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-19 20:16:09,680 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:09,680 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:09,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 20:16:09,894 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:09,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:09,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1967580964, now seen corresponding path program 33 times [2021-02-19 20:16:09,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:09,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506147301] [2021-02-19 20:16:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:09,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506147301] [2021-02-19 20:16:09,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440666656] [2021-02-19 20:16:09,943 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:16:09,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 20:16:09,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:09,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:16:09,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:10,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:10,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 20:16:10,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866444242] [2021-02-19 20:16:10,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:16:10,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:10,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:16:10,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:16:10,037 INFO L87 Difference]: Start difference. First operand 436 states and 875 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:10,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:10,073 INFO L93 Difference]: Finished difference Result 709 states and 1425 transitions. [2021-02-19 20:16:10,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:16:10,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-02-19 20:16:10,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:10,076 INFO L225 Difference]: With dead ends: 709 [2021-02-19 20:16:10,076 INFO L226 Difference]: Without dead ends: 703 [2021-02-19 20:16:10,076 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:16:10,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-02-19 20:16:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 481. [2021-02-19 20:16:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.0375) internal successors, (978), 480 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:10,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 978 transitions. [2021-02-19 20:16:10,087 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 978 transitions. Word has length 32 [2021-02-19 20:16:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:10,087 INFO L480 AbstractCegarLoop]: Abstraction has 481 states and 978 transitions. [2021-02-19 20:16:10,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 978 transitions. [2021-02-19 20:16:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:10,089 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:10,089 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:10,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 20:16:10,314 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:10,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:10,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1837766467, now seen corresponding path program 34 times [2021-02-19 20:16:10,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:10,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152951013] [2021-02-19 20:16:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:10,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152951013] [2021-02-19 20:16:10,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207559423] [2021-02-19 20:16:10,597 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:16:10,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:16:10,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:10,628 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:10,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:11,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:11,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:11,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:11,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:11,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:11,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:11,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:11,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:11,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:11,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:11,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:11,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:11,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-02-19 20:16:11,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599434630] [2021-02-19 20:16:11,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 20:16:11,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:11,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 20:16:11,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-02-19 20:16:11,114 INFO L87 Difference]: Start difference. First operand 481 states and 978 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-02-19 20:16:11,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:11,607 INFO L93 Difference]: Finished difference Result 1357 states and 2831 transitions. [2021-02-19 20:16:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 20:16:11,607 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 35 [2021-02-19 20:16:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:11,611 INFO L225 Difference]: With dead ends: 1357 [2021-02-19 20:16:11,612 INFO L226 Difference]: Without dead ends: 1265 [2021-02-19 20:16:11,612 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-02-19 20:16:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-02-19 20:16:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 523. [2021-02-19 20:16:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.0229885057471266) internal successors, (1056), 522 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1056 transitions. [2021-02-19 20:16:11,625 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1056 transitions. Word has length 35 [2021-02-19 20:16:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:11,625 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 1056 transitions. [2021-02-19 20:16:11,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-02-19 20:16:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1056 transitions. [2021-02-19 20:16:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:11,627 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:11,627 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:11,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 20:16:11,834 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:11,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:11,834 INFO L82 PathProgramCache]: Analyzing trace with hash -341737587, now seen corresponding path program 35 times [2021-02-19 20:16:11,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:11,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146594068] [2021-02-19 20:16:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:12,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146594068] [2021-02-19 20:16:12,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843643110] [2021-02-19 20:16:12,118 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:16:12,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 20:16:12,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:12,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:12,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:12,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:12,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:12,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:12,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:12,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:12,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:12,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:12,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:12,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:12,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:12,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:12,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:12,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-02-19 20:16:12,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311787607] [2021-02-19 20:16:12,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 20:16:12,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:12,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 20:16:12,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-02-19 20:16:12,707 INFO L87 Difference]: Start difference. First operand 523 states and 1056 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:13,234 INFO L93 Difference]: Finished difference Result 1364 states and 2863 transitions. [2021-02-19 20:16:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 20:16:13,235 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 20:16:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:13,238 INFO L225 Difference]: With dead ends: 1364 [2021-02-19 20:16:13,239 INFO L226 Difference]: Without dead ends: 1269 [2021-02-19 20:16:13,239 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-02-19 20:16:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-02-19 20:16:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 439. [2021-02-19 20:16:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.0547945205479454) internal successors, (900), 438 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 900 transitions. [2021-02-19 20:16:13,252 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 900 transitions. Word has length 35 [2021-02-19 20:16:13,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:13,252 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 900 transitions. [2021-02-19 20:16:13,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 900 transitions. [2021-02-19 20:16:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:13,253 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:13,253 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:13,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-02-19 20:16:13,459 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:13,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:13,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1569321523, now seen corresponding path program 36 times [2021-02-19 20:16:13,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:13,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663226177] [2021-02-19 20:16:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 20:16:13,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663226177] [2021-02-19 20:16:13,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169361889] [2021-02-19 20:16:13,731 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:13,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 20:16:13,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:13,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:13,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:14,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:14,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:14,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:14,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:14,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:14,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:14,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:14,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:14,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:14,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:14,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:14,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:14,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-02-19 20:16:14,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979241482] [2021-02-19 20:16:14,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 20:16:14,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:14,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 20:16:14,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-02-19 20:16:14,364 INFO L87 Difference]: Start difference. First operand 439 states and 900 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-02-19 20:16:14,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:14,991 INFO L93 Difference]: Finished difference Result 920 states and 1857 transitions. [2021-02-19 20:16:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 20:16:14,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 35 [2021-02-19 20:16:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:14,994 INFO L225 Difference]: With dead ends: 920 [2021-02-19 20:16:14,994 INFO L226 Difference]: Without dead ends: 720 [2021-02-19 20:16:14,995 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-02-19 20:16:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-02-19 20:16:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 514. [2021-02-19 20:16:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 2.0155945419103314) internal successors, (1034), 513 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1034 transitions. [2021-02-19 20:16:15,004 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1034 transitions. Word has length 35 [2021-02-19 20:16:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:15,004 INFO L480 AbstractCegarLoop]: Abstraction has 514 states and 1034 transitions. [2021-02-19 20:16:15,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-02-19 20:16:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1034 transitions. [2021-02-19 20:16:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:15,005 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:15,005 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:15,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:15,210 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:15,210 INFO L82 PathProgramCache]: Analyzing trace with hash 355372285, now seen corresponding path program 37 times [2021-02-19 20:16:15,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:15,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540861538] [2021-02-19 20:16:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:15,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540861538] [2021-02-19 20:16:15,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528641668] [2021-02-19 20:16:15,433 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:16:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:15,472 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:15,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:15,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:15,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:15,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:15,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:15,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:15,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:15,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:15,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:15,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:15,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:15,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:15,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:15,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-02-19 20:16:15,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873812446] [2021-02-19 20:16:15,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 20:16:15,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:15,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 20:16:15,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-02-19 20:16:15,963 INFO L87 Difference]: Start difference. First operand 514 states and 1034 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-02-19 20:16:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:16,159 INFO L93 Difference]: Finished difference Result 1080 states and 2241 transitions. [2021-02-19 20:16:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:16:16,160 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 35 [2021-02-19 20:16:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:16,164 INFO L225 Difference]: With dead ends: 1080 [2021-02-19 20:16:16,164 INFO L226 Difference]: Without dead ends: 1024 [2021-02-19 20:16:16,165 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-02-19 20:16:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-02-19 20:16:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 508. [2021-02-19 20:16:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.0118343195266273) internal successors, (1020), 507 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1020 transitions. [2021-02-19 20:16:16,178 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1020 transitions. Word has length 35 [2021-02-19 20:16:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:16,178 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 1020 transitions. [2021-02-19 20:16:16,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-02-19 20:16:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1020 transitions. [2021-02-19 20:16:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:16,179 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:16,179 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:16,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:16,394 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:16,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:16,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1608816899, now seen corresponding path program 38 times [2021-02-19 20:16:16,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:16,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884094941] [2021-02-19 20:16:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:16,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884094941] [2021-02-19 20:16:16,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905330236] [2021-02-19 20:16:16,679 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 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 [2021-02-19 20:16:16,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:16:16,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:16,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 20:16:16,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:17,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:17,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:17,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:17,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:17,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:17,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:17,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 43 [2021-02-19 20:16:17,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:17,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:17,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:17,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:123, output treesize:7 [2021-02-19 20:16:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:17,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:17,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-02-19 20:16:17,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907426342] [2021-02-19 20:16:17,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 20:16:17,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:17,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 20:16:17,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-02-19 20:16:17,277 INFO L87 Difference]: Start difference. First operand 508 states and 1020 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:17,689 INFO L93 Difference]: Finished difference Result 1187 states and 2452 transitions. [2021-02-19 20:16:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 20:16:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 20:16:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:17,694 INFO L225 Difference]: With dead ends: 1187 [2021-02-19 20:16:17,694 INFO L226 Difference]: Without dead ends: 1133 [2021-02-19 20:16:17,694 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-02-19 20:16:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-02-19 20:16:17,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 496. [2021-02-19 20:16:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 2.012121212121212) internal successors, (996), 495 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 996 transitions. [2021-02-19 20:16:17,708 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 996 transitions. Word has length 35 [2021-02-19 20:16:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:17,708 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 996 transitions. [2021-02-19 20:16:17,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 996 transitions. [2021-02-19 20:16:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:17,710 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:17,710 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:17,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:17,914 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:17,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:17,914 INFO L82 PathProgramCache]: Analyzing trace with hash -868984371, now seen corresponding path program 39 times [2021-02-19 20:16:17,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:17,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726974386] [2021-02-19 20:16:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:18,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726974386] [2021-02-19 20:16:18,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756600453] [2021-02-19 20:16:18,248 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 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 [2021-02-19 20:16:18,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 20:16:18,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:18,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:18,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:18,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:18,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:18,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:18,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:18,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:18,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:18,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:18,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:18,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:18,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:18,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:18,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-02-19 20:16:18,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567847657] [2021-02-19 20:16:18,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 20:16:18,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:18,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 20:16:18,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-02-19 20:16:18,860 INFO L87 Difference]: Start difference. First operand 496 states and 996 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:19,304 INFO L93 Difference]: Finished difference Result 854 states and 1739 transitions. [2021-02-19 20:16:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:16:19,304 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 20:16:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:19,307 INFO L225 Difference]: With dead ends: 854 [2021-02-19 20:16:19,308 INFO L226 Difference]: Without dead ends: 833 [2021-02-19 20:16:19,308 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-02-19 20:16:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-02-19 20:16:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 499. [2021-02-19 20:16:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0120481927710845) internal successors, (1002), 498 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1002 transitions. [2021-02-19 20:16:19,319 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1002 transitions. Word has length 35 [2021-02-19 20:16:19,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:19,319 INFO L480 AbstractCegarLoop]: Abstraction has 499 states and 1002 transitions. [2021-02-19 20:16:19,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:19,320 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1002 transitions. [2021-02-19 20:16:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:19,321 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:19,321 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:19,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 20:16:19,545 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:19,545 INFO L82 PathProgramCache]: Analyzing trace with hash 170536189, now seen corresponding path program 40 times [2021-02-19 20:16:19,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:19,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161812231] [2021-02-19 20:16:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:19,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161812231] [2021-02-19 20:16:19,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275983099] [2021-02-19 20:16:19,825 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:16:19,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:16:19,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:19,860 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:19,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:20,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:20,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:20,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:20,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:20,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:20,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:20,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:20,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:20,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:20,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-02-19 20:16:20,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177125956] [2021-02-19 20:16:20,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:16:20,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:20,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:16:20,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:16:20,412 INFO L87 Difference]: Start difference. First operand 499 states and 1002 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:21,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:21,086 INFO L93 Difference]: Finished difference Result 1228 states and 2448 transitions. [2021-02-19 20:16:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 20:16:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 20:16:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:21,090 INFO L225 Difference]: With dead ends: 1228 [2021-02-19 20:16:21,090 INFO L226 Difference]: Without dead ends: 964 [2021-02-19 20:16:21,090 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-02-19 20:16:21,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-02-19 20:16:21,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 634. [2021-02-19 20:16:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.006319115323855) internal successors, (1270), 633 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1270 transitions. [2021-02-19 20:16:21,105 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1270 transitions. Word has length 35 [2021-02-19 20:16:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:21,105 INFO L480 AbstractCegarLoop]: Abstraction has 634 states and 1270 transitions. [2021-02-19 20:16:21,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1270 transitions. [2021-02-19 20:16:21,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:21,107 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:21,107 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:21,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:21,326 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash 131040813, now seen corresponding path program 41 times [2021-02-19 20:16:21,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:21,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859468527] [2021-02-19 20:16:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:21,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859468527] [2021-02-19 20:16:21,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363954913] [2021-02-19 20:16:21,629 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 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 [2021-02-19 20:16:21,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 20:16:21,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:21,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 20:16:21,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:22,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:22,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:22,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:22,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:22,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:22,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:22,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:22,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:22,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:22,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:22,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:22,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-02-19 20:16:22,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066915971] [2021-02-19 20:16:22,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 20:16:22,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:22,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 20:16:22,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-02-19 20:16:22,182 INFO L87 Difference]: Start difference. First operand 634 states and 1270 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:22,694 INFO L93 Difference]: Finished difference Result 1676 states and 3402 transitions. [2021-02-19 20:16:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 20:16:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 20:16:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:22,699 INFO L225 Difference]: With dead ends: 1676 [2021-02-19 20:16:22,699 INFO L226 Difference]: Without dead ends: 1458 [2021-02-19 20:16:22,700 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-02-19 20:16:22,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-02-19 20:16:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 763. [2021-02-19 20:16:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 1.9960629921259843) internal successors, (1521), 762 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:22,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1521 transitions. [2021-02-19 20:16:22,720 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1521 transitions. Word has length 35 [2021-02-19 20:16:22,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:22,720 INFO L480 AbstractCegarLoop]: Abstraction has 763 states and 1521 transitions. [2021-02-19 20:16:22,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:22,720 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1521 transitions. [2021-02-19 20:16:22,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:22,722 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:22,722 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:22,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:22,938 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:22,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:22,938 INFO L82 PathProgramCache]: Analyzing trace with hash 870873341, now seen corresponding path program 42 times [2021-02-19 20:16:22,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:22,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200106690] [2021-02-19 20:16:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:23,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200106690] [2021-02-19 20:16:23,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007609662] [2021-02-19 20:16:23,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:16:23,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 20:16:23,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:23,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 20:16:23,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:23,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:23,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:23,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:23,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:23,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:23,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 43 [2021-02-19 20:16:23,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:23,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:23,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:23,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:121, output treesize:7 [2021-02-19 20:16:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:23,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:23,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-02-19 20:16:23,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499131588] [2021-02-19 20:16:23,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 20:16:23,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:23,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 20:16:23,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-02-19 20:16:23,801 INFO L87 Difference]: Start difference. First operand 763 states and 1521 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:24,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:24,278 INFO L93 Difference]: Finished difference Result 1116 states and 2253 transitions. [2021-02-19 20:16:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:16:24,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 20:16:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:24,282 INFO L225 Difference]: With dead ends: 1116 [2021-02-19 20:16:24,282 INFO L226 Difference]: Without dead ends: 1095 [2021-02-19 20:16:24,283 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-02-19 20:16:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-02-19 20:16:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 766. [2021-02-19 20:16:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 1.996078431372549) internal successors, (1527), 765 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1527 transitions. [2021-02-19 20:16:24,301 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1527 transitions. Word has length 35 [2021-02-19 20:16:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:24,301 INFO L480 AbstractCegarLoop]: Abstraction has 766 states and 1527 transitions. [2021-02-19 20:16:24,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1527 transitions. [2021-02-19 20:16:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:24,303 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:24,303 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:24,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 20:16:24,518 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:24,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:24,518 INFO L82 PathProgramCache]: Analyzing trace with hash -682601587, now seen corresponding path program 43 times [2021-02-19 20:16:24,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:24,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63955038] [2021-02-19 20:16:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:24,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63955038] [2021-02-19 20:16:24,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978855848] [2021-02-19 20:16:24,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:24,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:24,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:25,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:25,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:25,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:25,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:25,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:25,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:25,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:25,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:25,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:25,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:25,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-02-19 20:16:25,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331376720] [2021-02-19 20:16:25,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 20:16:25,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 20:16:25,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-02-19 20:16:25,288 INFO L87 Difference]: Start difference. First operand 766 states and 1527 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:25,662 INFO L93 Difference]: Finished difference Result 1511 states and 3054 transitions. [2021-02-19 20:16:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 20:16:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 20:16:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:25,665 INFO L225 Difference]: With dead ends: 1511 [2021-02-19 20:16:25,665 INFO L226 Difference]: Without dead ends: 1470 [2021-02-19 20:16:25,666 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-02-19 20:16:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-02-19 20:16:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 790. [2021-02-19 20:16:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 2.0) internal successors, (1578), 789 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1578 transitions. [2021-02-19 20:16:25,685 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1578 transitions. Word has length 35 [2021-02-19 20:16:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:25,685 INFO L480 AbstractCegarLoop]: Abstraction has 790 states and 1578 transitions. [2021-02-19 20:16:25,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1578 transitions. [2021-02-19 20:16:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:25,686 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:25,686 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:25,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 20:16:25,901 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:25,901 INFO L82 PathProgramCache]: Analyzing trace with hash -983604403, now seen corresponding path program 44 times [2021-02-19 20:16:25,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:25,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889775897] [2021-02-19 20:16:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-02-19 20:16:26,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889775897] [2021-02-19 20:16:26,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337877791] [2021-02-19 20:16:26,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:26,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:16:26,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:26,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:26,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:26,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:26,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:26,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:26,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:26,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:26,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:26,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:26,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:26,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:26,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 19 [2021-02-19 20:16:26,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081755442] [2021-02-19 20:16:26,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 20:16:26,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:26,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 20:16:26,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-02-19 20:16:26,585 INFO L87 Difference]: Start difference. First operand 790 states and 1578 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:26,946 INFO L93 Difference]: Finished difference Result 1509 states and 3056 transitions. [2021-02-19 20:16:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 20:16:26,947 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 20:16:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:26,949 INFO L225 Difference]: With dead ends: 1509 [2021-02-19 20:16:26,949 INFO L226 Difference]: Without dead ends: 1375 [2021-02-19 20:16:26,949 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:16:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-02-19 20:16:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 844. [2021-02-19 20:16:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 1.99644128113879) internal successors, (1683), 843 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1683 transitions. [2021-02-19 20:16:26,971 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1683 transitions. Word has length 35 [2021-02-19 20:16:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:26,971 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 1683 transitions. [2021-02-19 20:16:26,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1683 transitions. [2021-02-19 20:16:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:26,973 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:26,973 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:27,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 20:16:27,186 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:27,186 INFO L82 PathProgramCache]: Analyzing trace with hash 2044283581, now seen corresponding path program 45 times [2021-02-19 20:16:27,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:27,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305318414] [2021-02-19 20:16:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:27,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305318414] [2021-02-19 20:16:27,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140968970] [2021-02-19 20:16:27,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:27,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 20:16:27,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:27,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:27,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:27,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:27,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:27,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:27,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:27,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:27,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:27,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:27,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:27,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:27,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 20 [2021-02-19 20:16:27,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258705392] [2021-02-19 20:16:27,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:16:27,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:27,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:16:27,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:16:27,845 INFO L87 Difference]: Start difference. First operand 844 states and 1683 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-02-19 20:16:28,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:28,220 INFO L93 Difference]: Finished difference Result 1808 states and 3631 transitions. [2021-02-19 20:16:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 20:16:28,221 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 35 [2021-02-19 20:16:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:28,225 INFO L225 Difference]: With dead ends: 1808 [2021-02-19 20:16:28,225 INFO L226 Difference]: Without dead ends: 1609 [2021-02-19 20:16:28,225 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-02-19 20:16:28,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-02-19 20:16:28,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 950. [2021-02-19 20:16:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.005268703898841) internal successors, (1903), 949 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1903 transitions. [2021-02-19 20:16:28,246 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1903 transitions. Word has length 35 [2021-02-19 20:16:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:28,246 INFO L480 AbstractCegarLoop]: Abstraction has 950 states and 1903 transitions. [2021-02-19 20:16:28,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-02-19 20:16:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1903 transitions. [2021-02-19 20:16:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:28,248 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:28,249 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:28,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:28,462 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:28,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:28,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1550346563, now seen corresponding path program 46 times [2021-02-19 20:16:28,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:28,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102564011] [2021-02-19 20:16:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:28,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102564011] [2021-02-19 20:16:28,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866766221] [2021-02-19 20:16:28,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:28,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:16:28,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:28,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:28,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:29,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:29,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:29,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:29,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:29,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:29,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:29,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:29,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:29,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:29,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-02-19 20:16:29,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001961272] [2021-02-19 20:16:29,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:16:29,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:29,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:16:29,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:16:29,257 INFO L87 Difference]: Start difference. First operand 950 states and 1903 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 20:16:29,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:29,661 INFO L93 Difference]: Finished difference Result 1838 states and 3811 transitions. [2021-02-19 20:16:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 20:16:29,662 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 35 [2021-02-19 20:16:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:29,664 INFO L225 Difference]: With dead ends: 1838 [2021-02-19 20:16:29,664 INFO L226 Difference]: Without dead ends: 1719 [2021-02-19 20:16:29,665 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:16:29,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-02-19 20:16:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 965. [2021-02-19 20:16:29,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 2.0062240663900415) internal successors, (1934), 964 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1934 transitions. [2021-02-19 20:16:29,683 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1934 transitions. Word has length 35 [2021-02-19 20:16:29,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:29,683 INFO L480 AbstractCegarLoop]: Abstraction has 965 states and 1934 transitions. [2021-02-19 20:16:29,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 20:16:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1934 transitions. [2021-02-19 20:16:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:29,685 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:29,685 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:29,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:29,909 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:29,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:29,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1419530573, now seen corresponding path program 47 times [2021-02-19 20:16:29,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:29,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426821025] [2021-02-19 20:16:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:30,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426821025] [2021-02-19 20:16:30,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286273956] [2021-02-19 20:16:30,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:30,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 20:16:30,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:30,233 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:30,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:30,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:30,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:30,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:30,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:30,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:30,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:30,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:30,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2021-02-19 20:16:30,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:30,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:30,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:30,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:3 [2021-02-19 20:16:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:30,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:30,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-02-19 20:16:30,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221123504] [2021-02-19 20:16:30,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 20:16:30,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:30,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 20:16:30,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-02-19 20:16:30,851 INFO L87 Difference]: Start difference. First operand 965 states and 1934 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:31,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:31,411 INFO L93 Difference]: Finished difference Result 1716 states and 3482 transitions. [2021-02-19 20:16:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 20:16:31,412 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 20:16:31,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:31,415 INFO L225 Difference]: With dead ends: 1716 [2021-02-19 20:16:31,415 INFO L226 Difference]: Without dead ends: 1570 [2021-02-19 20:16:31,415 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:16:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2021-02-19 20:16:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1043. [2021-02-19 20:16:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 2.0095969289827256) internal successors, (2094), 1042 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 2094 transitions. [2021-02-19 20:16:31,434 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 2094 transitions. Word has length 35 [2021-02-19 20:16:31,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:31,435 INFO L480 AbstractCegarLoop]: Abstraction has 1043 states and 2094 transitions. [2021-02-19 20:16:31,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:31,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 2094 transitions. [2021-02-19 20:16:31,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:31,437 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:31,437 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:31,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-02-19 20:16:31,654 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:31,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:31,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1414777011, now seen corresponding path program 48 times [2021-02-19 20:16:31,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:31,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664230710] [2021-02-19 20:16:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:31,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664230710] [2021-02-19 20:16:31,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958162241] [2021-02-19 20:16:31,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:31,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 20:16:31,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:31,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:32,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:32,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:32,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:32,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:32,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:32,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:32,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:32,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:32,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 20 [2021-02-19 20:16:32,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536946696] [2021-02-19 20:16:32,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:16:32,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:32,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:16:32,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:16:32,437 INFO L87 Difference]: Start difference. First operand 1043 states and 2094 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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) [2021-02-19 20:16:32,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:32,873 INFO L93 Difference]: Finished difference Result 2034 states and 4153 transitions. [2021-02-19 20:16:32,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 20:16:32,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 35 [2021-02-19 20:16:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:32,876 INFO L225 Difference]: With dead ends: 2034 [2021-02-19 20:16:32,877 INFO L226 Difference]: Without dead ends: 1974 [2021-02-19 20:16:32,877 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:16:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2021-02-19 20:16:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1010. [2021-02-19 20:16:32,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 2.0059464816650148) internal successors, (2024), 1009 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:32,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 2024 transitions. [2021-02-19 20:16:32,902 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 2024 transitions. Word has length 35 [2021-02-19 20:16:32,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:32,902 INFO L480 AbstractCegarLoop]: Abstraction has 1010 states and 2024 transitions. [2021-02-19 20:16:32,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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) [2021-02-19 20:16:32,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 2024 transitions. [2021-02-19 20:16:32,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:32,904 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:32,904 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:33,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:33,126 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:33,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:33,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2119867725, now seen corresponding path program 49 times [2021-02-19 20:16:33,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:33,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319901144] [2021-02-19 20:16:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:33,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319901144] [2021-02-19 20:16:33,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813670888] [2021-02-19 20:16:33,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:33,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:33,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:33,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:33,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:33,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:33,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:33,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:33,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:33,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:33,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:33,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-02-19 20:16:33,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768807017] [2021-02-19 20:16:33,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 20:16:33,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:33,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 20:16:33,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-02-19 20:16:33,957 INFO L87 Difference]: Start difference. First operand 1010 states and 2024 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2021-02-19 20:16:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:34,370 INFO L93 Difference]: Finished difference Result 1817 states and 3706 transitions. [2021-02-19 20:16:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 20:16:34,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 35 [2021-02-19 20:16:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:34,374 INFO L225 Difference]: With dead ends: 1817 [2021-02-19 20:16:34,374 INFO L226 Difference]: Without dead ends: 1761 [2021-02-19 20:16:34,374 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-02-19 20:16:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2021-02-19 20:16:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1010. [2021-02-19 20:16:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 2.0059464816650148) internal successors, (2024), 1009 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 2024 transitions. [2021-02-19 20:16:34,393 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 2024 transitions. Word has length 35 [2021-02-19 20:16:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:34,393 INFO L480 AbstractCegarLoop]: Abstraction has 1010 states and 2024 transitions. [2021-02-19 20:16:34,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2021-02-19 20:16:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 2024 transitions. [2021-02-19 20:16:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:16:34,395 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:34,395 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:34,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 20:16:34,616 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash -715127683, now seen corresponding path program 50 times [2021-02-19 20:16:34,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:34,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069851494] [2021-02-19 20:16:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:34,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069851494] [2021-02-19 20:16:34,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637644180] [2021-02-19 20:16:34,907 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 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 [2021-02-19 20:16:34,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:16:34,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:34,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 20:16:34,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:35,222 INFO L354 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2021-02-19 20:16:35,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 43 [2021-02-19 20:16:35,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:35,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:35,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:35,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:35,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:35,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-02-19 20:16:35,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000896228] [2021-02-19 20:16:35,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:16:35,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:35,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:16:35,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:16:35,242 INFO L87 Difference]: Start difference. First operand 1010 states and 2024 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:35,640 INFO L93 Difference]: Finished difference Result 1454 states and 2922 transitions. [2021-02-19 20:16:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 20:16:35,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 20:16:35,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:35,644 INFO L225 Difference]: With dead ends: 1454 [2021-02-19 20:16:35,644 INFO L226 Difference]: Without dead ends: 1439 [2021-02-19 20:16:35,644 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:16:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-02-19 20:16:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1017. [2021-02-19 20:16:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 2.0068897637795278) internal successors, (2039), 1016 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 2039 transitions. [2021-02-19 20:16:35,668 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 2039 transitions. Word has length 35 [2021-02-19 20:16:35,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:35,668 INFO L480 AbstractCegarLoop]: Abstraction has 1017 states and 2039 transitions. [2021-02-19 20:16:35,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 2039 transitions. [2021-02-19 20:16:35,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 20:16:35,670 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:35,670 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:35,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-02-19 20:16:35,886 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:35,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:35,886 INFO L82 PathProgramCache]: Analyzing trace with hash -863970300, now seen corresponding path program 51 times [2021-02-19 20:16:35,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:35,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681789401] [2021-02-19 20:16:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:35,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681789401] [2021-02-19 20:16:35,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131213364] [2021-02-19 20:16:35,953 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 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 [2021-02-19 20:16:35,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 20:16:35,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:35,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 20:16:35,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:36,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:36,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 20:16:36,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572319471] [2021-02-19 20:16:36,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:16:36,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:36,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:16:36,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:16:36,060 INFO L87 Difference]: Start difference. First operand 1017 states and 2039 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:36,105 INFO L93 Difference]: Finished difference Result 1342 states and 2693 transitions. [2021-02-19 20:16:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:16:36,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 20:16:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:36,109 INFO L225 Difference]: With dead ends: 1342 [2021-02-19 20:16:36,109 INFO L226 Difference]: Without dead ends: 1335 [2021-02-19 20:16:36,109 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:16:36,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2021-02-19 20:16:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1066. [2021-02-19 20:16:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 2.0187793427230045) internal successors, (2150), 1065 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:36,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 2150 transitions. [2021-02-19 20:16:36,129 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 2150 transitions. Word has length 36 [2021-02-19 20:16:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:36,129 INFO L480 AbstractCegarLoop]: Abstraction has 1066 states and 2150 transitions. [2021-02-19 20:16:36,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:36,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 2150 transitions. [2021-02-19 20:16:36,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 20:16:36,131 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:36,131 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:36,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 20:16:36,355 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:36,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:36,356 INFO L82 PathProgramCache]: Analyzing trace with hash 839336364, now seen corresponding path program 52 times [2021-02-19 20:16:36,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:36,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764750068] [2021-02-19 20:16:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:36,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764750068] [2021-02-19 20:16:36,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52332106] [2021-02-19 20:16:36,627 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 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 [2021-02-19 20:16:36,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:16:36,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:36,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 20:16:36,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:37,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:37,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:37,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:37,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-02-19 20:16:37,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:37,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:37,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:37,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-02-19 20:16:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:37,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:37,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-02-19 20:16:37,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144391104] [2021-02-19 20:16:37,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 20:16:37,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:37,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 20:16:37,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-02-19 20:16:37,167 INFO L87 Difference]: Start difference. First operand 1066 states and 2150 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:38,148 INFO L93 Difference]: Finished difference Result 2616 states and 5377 transitions. [2021-02-19 20:16:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:16:38,149 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 20:16:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:38,158 INFO L225 Difference]: With dead ends: 2616 [2021-02-19 20:16:38,158 INFO L226 Difference]: Without dead ends: 2292 [2021-02-19 20:16:38,159 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:16:38,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-02-19 20:16:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 1105. [2021-02-19 20:16:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 2.0153985507246377) internal successors, (2225), 1104 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:38,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 2225 transitions. [2021-02-19 20:16:38,184 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 2225 transitions. Word has length 38 [2021-02-19 20:16:38,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:38,184 INFO L480 AbstractCegarLoop]: Abstraction has 1105 states and 2225 transitions. [2021-02-19 20:16:38,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 2225 transitions. [2021-02-19 20:16:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:16:38,187 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:38,187 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:38,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 20:16:38,411 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:38,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1376973637, now seen corresponding path program 53 times [2021-02-19 20:16:38,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:38,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354206528] [2021-02-19 20:16:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:38,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354206528] [2021-02-19 20:16:38,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106498846] [2021-02-19 20:16:38,727 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 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 [2021-02-19 20:16:38,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 20:16:38,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:38,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 20:16:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:39,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:39,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:39,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:39,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:39,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:39,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:39,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 20:16:39,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:39,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:39,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:39,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 20:16:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:39,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:39,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-02-19 20:16:39,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582321317] [2021-02-19 20:16:39,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:16:39,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:39,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:16:39,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:16:39,421 INFO L87 Difference]: Start difference. First operand 1105 states and 2225 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-02-19 20:16:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:39,886 INFO L93 Difference]: Finished difference Result 2400 states and 4895 transitions. [2021-02-19 20:16:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:16:39,887 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 [2021-02-19 20:16:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:39,890 INFO L225 Difference]: With dead ends: 2400 [2021-02-19 20:16:39,890 INFO L226 Difference]: Without dead ends: 2346 [2021-02-19 20:16:39,890 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:16:39,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-02-19 20:16:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1156. [2021-02-19 20:16:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 2.006926406926407) internal successors, (2318), 1155 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 2318 transitions. [2021-02-19 20:16:39,910 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 2318 transitions. Word has length 39 [2021-02-19 20:16:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:39,910 INFO L480 AbstractCegarLoop]: Abstraction has 1156 states and 2318 transitions. [2021-02-19 20:16:39,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-02-19 20:16:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 2318 transitions. [2021-02-19 20:16:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:16:39,912 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:39,912 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:40,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:40,126 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:40,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:40,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1543519787, now seen corresponding path program 54 times [2021-02-19 20:16:40,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:40,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527955725] [2021-02-19 20:16:40,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:40,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527955725] [2021-02-19 20:16:40,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554793793] [2021-02-19 20:16:40,474 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 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 [2021-02-19 20:16:40,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 20:16:40,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:40,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-02-19 20:16:40,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:41,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:41,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:41,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:41,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:41,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:41,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:41,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:41,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 48 [2021-02-19 20:16:41,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:41,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:41,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:41,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-02-19 20:16:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:41,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:41,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-02-19 20:16:41,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494284898] [2021-02-19 20:16:41,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:16:41,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:41,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:16:41,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:16:41,292 INFO L87 Difference]: Start difference. First operand 1156 states and 2318 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-02-19 20:16:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:42,225 INFO L93 Difference]: Finished difference Result 2045 states and 4130 transitions. [2021-02-19 20:16:42,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:16:42,225 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 [2021-02-19 20:16:42,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:42,228 INFO L225 Difference]: With dead ends: 2045 [2021-02-19 20:16:42,228 INFO L226 Difference]: Without dead ends: 2024 [2021-02-19 20:16:42,228 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:16:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-02-19 20:16:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1162. [2021-02-19 20:16:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 2.007751937984496) internal successors, (2331), 1161 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 2331 transitions. [2021-02-19 20:16:42,247 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 2331 transitions. Word has length 39 [2021-02-19 20:16:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:42,247 INFO L480 AbstractCegarLoop]: Abstraction has 1162 states and 2331 transitions. [2021-02-19 20:16:42,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-02-19 20:16:42,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 2331 transitions. [2021-02-19 20:16:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:16:42,248 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:42,248 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:42,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 20:16:42,449 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:42,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:42,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1957151045, now seen corresponding path program 55 times [2021-02-19 20:16:42,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:42,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516247229] [2021-02-19 20:16:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:42,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516247229] [2021-02-19 20:16:42,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356593935] [2021-02-19 20:16:42,708 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 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 [2021-02-19 20:16:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:42,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 20:16:42,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:43,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:43,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:43,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:43,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:43,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:43,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:43,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:43,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 20:16:43,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:43,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:43,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:43,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 20:16:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:43,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:43,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-02-19 20:16:43,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804264491] [2021-02-19 20:16:43,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 20:16:43,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:43,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 20:16:43,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-02-19 20:16:43,417 INFO L87 Difference]: Start difference. First operand 1162 states and 2331 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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) [2021-02-19 20:16:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:44,140 INFO L93 Difference]: Finished difference Result 2106 states and 4214 transitions. [2021-02-19 20:16:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 20:16:44,141 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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 [2021-02-19 20:16:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:44,143 INFO L225 Difference]: With dead ends: 2106 [2021-02-19 20:16:44,143 INFO L226 Difference]: Without dead ends: 1819 [2021-02-19 20:16:44,143 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:16:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2021-02-19 20:16:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1216. [2021-02-19 20:16:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 1.997530864197531) internal successors, (2427), 1215 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 2427 transitions. [2021-02-19 20:16:44,163 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 2427 transitions. Word has length 39 [2021-02-19 20:16:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:44,163 INFO L480 AbstractCegarLoop]: Abstraction has 1216 states and 2427 transitions. [2021-02-19 20:16:44,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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) [2021-02-19 20:16:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 2427 transitions. [2021-02-19 20:16:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:16:44,165 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:44,165 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:44,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:44,370 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:44,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:44,370 INFO L82 PathProgramCache]: Analyzing trace with hash 78007989, now seen corresponding path program 56 times [2021-02-19 20:16:44,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:44,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020361633] [2021-02-19 20:16:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:44,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020361633] [2021-02-19 20:16:44,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817679486] [2021-02-19 20:16:44,693 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 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 [2021-02-19 20:16:44,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:16:44,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:44,717 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 20:16:44,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:45,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:45,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:45,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:45,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:45,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:45,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 20:16:45,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:45,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:45,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:45,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 20:16:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:45,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:45,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-02-19 20:16:45,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81715062] [2021-02-19 20:16:45,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:16:45,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:45,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:16:45,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:16:45,418 INFO L87 Difference]: Start difference. First operand 1216 states and 2427 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-02-19 20:16:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:46,243 INFO L93 Difference]: Finished difference Result 2861 states and 5911 transitions. [2021-02-19 20:16:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:16:46,243 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 [2021-02-19 20:16:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:46,247 INFO L225 Difference]: With dead ends: 2861 [2021-02-19 20:16:46,247 INFO L226 Difference]: Without dead ends: 2725 [2021-02-19 20:16:46,247 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:16:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-02-19 20:16:46,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1012. [2021-02-19 20:16:46,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.025717111770524) internal successors, (2048), 1011 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:46,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 2048 transitions. [2021-02-19 20:16:46,266 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 2048 transitions. Word has length 39 [2021-02-19 20:16:46,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:46,267 INFO L480 AbstractCegarLoop]: Abstraction has 1012 states and 2048 transitions. [2021-02-19 20:16:46,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-02-19 20:16:46,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 2048 transitions. [2021-02-19 20:16:46,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:16:46,268 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:46,268 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:46,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-02-19 20:16:46,469 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:46,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1452481861, now seen corresponding path program 57 times [2021-02-19 20:16:46,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:46,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544274454] [2021-02-19 20:16:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:46,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544274454] [2021-02-19 20:16:46,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057484766] [2021-02-19 20:16:46,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:16:46,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 20:16:46,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:46,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 20:16:46,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:47,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:47,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:47,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:47,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:47,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:47,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:47,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 20:16:47,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:47,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:47,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:47,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 20:16:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:47,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:47,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-02-19 20:16:47,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263283224] [2021-02-19 20:16:47,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:16:47,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:47,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:16:47,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:16:47,493 INFO L87 Difference]: Start difference. First operand 1012 states and 2048 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-02-19 20:16:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:47,997 INFO L93 Difference]: Finished difference Result 2184 states and 4430 transitions. [2021-02-19 20:16:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:16:47,998 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 [2021-02-19 20:16:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:48,001 INFO L225 Difference]: With dead ends: 2184 [2021-02-19 20:16:48,001 INFO L226 Difference]: Without dead ends: 2158 [2021-02-19 20:16:48,002 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:16:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-02-19 20:16:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1036. [2021-02-19 20:16:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.0280193236714976) internal successors, (2099), 1035 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2099 transitions. [2021-02-19 20:16:48,025 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2099 transitions. Word has length 39 [2021-02-19 20:16:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:48,025 INFO L480 AbstractCegarLoop]: Abstraction has 1036 states and 2099 transitions. [2021-02-19 20:16:48,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-02-19 20:16:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2099 transitions. [2021-02-19 20:16:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:16:48,027 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:48,027 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:48,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:48,227 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1870056469, now seen corresponding path program 58 times [2021-02-19 20:16:48,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:48,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974437701] [2021-02-19 20:16:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:48,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974437701] [2021-02-19 20:16:48,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921636678] [2021-02-19 20:16:48,560 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 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 [2021-02-19 20:16:48,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:16:48,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:48,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 20:16:48,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:49,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:49,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:49,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:49,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:49,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:49,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 20:16:49,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:49,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:49,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:49,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 20:16:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:49,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:49,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-02-19 20:16:49,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435950700] [2021-02-19 20:16:49,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:16:49,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:49,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:16:49,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:16:49,305 INFO L87 Difference]: Start difference. First operand 1036 states and 2099 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-02-19 20:16:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:49,809 INFO L93 Difference]: Finished difference Result 2169 states and 4457 transitions. [2021-02-19 20:16:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:16:49,810 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 [2021-02-19 20:16:49,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:49,813 INFO L225 Difference]: With dead ends: 2169 [2021-02-19 20:16:49,813 INFO L226 Difference]: Without dead ends: 2103 [2021-02-19 20:16:49,813 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:16:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2103 states. [2021-02-19 20:16:49,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2103 to 937. [2021-02-19 20:16:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 2.047008547008547) internal successors, (1916), 936 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1916 transitions. [2021-02-19 20:16:49,835 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1916 transitions. Word has length 39 [2021-02-19 20:16:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:49,835 INFO L480 AbstractCegarLoop]: Abstraction has 937 states and 1916 transitions. [2021-02-19 20:16:49,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-02-19 20:16:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1916 transitions. [2021-02-19 20:16:49,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:16:49,837 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:49,837 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:50,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-02-19 20:16:50,062 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:50,063 INFO L82 PathProgramCache]: Analyzing trace with hash -436976251, now seen corresponding path program 59 times [2021-02-19 20:16:50,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:50,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491709737] [2021-02-19 20:16:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:50,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491709737] [2021-02-19 20:16:50,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864222569] [2021-02-19 20:16:50,438 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 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 [2021-02-19 20:16:50,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 20:16:50,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:50,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 60 conjunts are in the unsatisfiable core [2021-02-19 20:16:50,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:51,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:51,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:51,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:51,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:51,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:51,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:51,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:51,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 48 [2021-02-19 20:16:51,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:51,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:51,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:51,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-02-19 20:16:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:51,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:51,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-02-19 20:16:51,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362886141] [2021-02-19 20:16:51,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:16:51,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:51,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:16:51,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:16:51,142 INFO L87 Difference]: Start difference. First operand 937 states and 1916 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-02-19 20:16:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:51,779 INFO L93 Difference]: Finished difference Result 1476 states and 3001 transitions. [2021-02-19 20:16:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 20:16:51,780 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 [2021-02-19 20:16:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:51,782 INFO L225 Difference]: With dead ends: 1476 [2021-02-19 20:16:51,782 INFO L226 Difference]: Without dead ends: 1445 [2021-02-19 20:16:51,782 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 20:16:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-02-19 20:16:51,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1045. [2021-02-19 20:16:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.024904214559387) internal successors, (2114), 1044 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2114 transitions. [2021-02-19 20:16:51,795 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2114 transitions. Word has length 39 [2021-02-19 20:16:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:51,796 INFO L480 AbstractCegarLoop]: Abstraction has 1045 states and 2114 transitions. [2021-02-19 20:16:51,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-02-19 20:16:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2114 transitions. [2021-02-19 20:16:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:16:51,797 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:51,797 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:51,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:51,998 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:51,998 INFO L82 PathProgramCache]: Analyzing trace with hash -508297275, now seen corresponding path program 60 times [2021-02-19 20:16:51,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:51,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098384357] [2021-02-19 20:16:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-02-19 20:16:52,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098384357] [2021-02-19 20:16:52,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223784628] [2021-02-19 20:16:52,293 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 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 [2021-02-19 20:16:52,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 20:16:52,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:52,328 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-02-19 20:16:52,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:52,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:52,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:52,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 48 [2021-02-19 20:16:52,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:52,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:52,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:52,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-02-19 20:16:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:53,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:53,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-02-19 20:16:53,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732469071] [2021-02-19 20:16:53,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 20:16:53,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 20:16:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-02-19 20:16:53,023 INFO L87 Difference]: Start difference. First operand 1045 states and 2114 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:53,947 INFO L93 Difference]: Finished difference Result 1653 states and 3368 transitions. [2021-02-19 20:16:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 20:16:53,948 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 20:16:53,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:53,950 INFO L225 Difference]: With dead ends: 1653 [2021-02-19 20:16:53,950 INFO L226 Difference]: Without dead ends: 1621 [2021-02-19 20:16:53,951 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:16:53,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-02-19 20:16:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 854. [2021-02-19 20:16:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.0386869871043376) internal successors, (1739), 853 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1739 transitions. [2021-02-19 20:16:53,963 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1739 transitions. Word has length 39 [2021-02-19 20:16:53,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:53,963 INFO L480 AbstractCegarLoop]: Abstraction has 854 states and 1739 transitions. [2021-02-19 20:16:53,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1739 transitions. [2021-02-19 20:16:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:16:53,964 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:53,964 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:54,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 20:16:54,165 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:54,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash 451157893, now seen corresponding path program 61 times [2021-02-19 20:16:54,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:54,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677238028] [2021-02-19 20:16:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:54,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677238028] [2021-02-19 20:16:54,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775041037] [2021-02-19 20:16:54,548 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 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 [2021-02-19 20:16:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:54,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 20:16:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:55,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:55,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:55,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:55,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:55,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:55,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:55,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:55,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 20:16:55,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:55,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:55,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:55,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 20:16:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:55,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:55,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-02-19 20:16:55,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785904591] [2021-02-19 20:16:55,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 20:16:55,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:55,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 20:16:55,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-02-19 20:16:55,287 INFO L87 Difference]: Start difference. First operand 854 states and 1739 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-02-19 20:16:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:56,051 INFO L93 Difference]: Finished difference Result 1667 states and 3367 transitions. [2021-02-19 20:16:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:16:56,051 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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 [2021-02-19 20:16:56,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:56,053 INFO L225 Difference]: With dead ends: 1667 [2021-02-19 20:16:56,053 INFO L226 Difference]: Without dead ends: 1381 [2021-02-19 20:16:56,053 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:16:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-02-19 20:16:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 876. [2021-02-19 20:16:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.013714285714286) internal successors, (1762), 875 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:56,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1762 transitions. [2021-02-19 20:16:56,069 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1762 transitions. Word has length 39 [2021-02-19 20:16:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:56,069 INFO L480 AbstractCegarLoop]: Abstraction has 876 states and 1762 transitions. [2021-02-19 20:16:56,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-02-19 20:16:56,070 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1762 transitions. [2021-02-19 20:16:56,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:16:56,071 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:56,071 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:56,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:56,286 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:56,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:56,286 INFO L82 PathProgramCache]: Analyzing trace with hash -53511291, now seen corresponding path program 62 times [2021-02-19 20:16:56,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:56,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372719924] [2021-02-19 20:16:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:56,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372719924] [2021-02-19 20:16:56,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282965798] [2021-02-19 20:16:56,672 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:16:56,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:16:56,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:56,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 20:16:56,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:16:57,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:57,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:57,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:57,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:57,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:57,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:57,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:57,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 20:16:57,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:57,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:16:57,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:57,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 20:16:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:57,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:57,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-02-19 20:16:57,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009429924] [2021-02-19 20:16:57,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:16:57,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:57,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:16:57,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:16:57,413 INFO L87 Difference]: Start difference. First operand 876 states and 1762 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-02-19 20:16:57,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:16:57,794 INFO L93 Difference]: Finished difference Result 1872 states and 3922 transitions. [2021-02-19 20:16:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 20:16:57,794 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 [2021-02-19 20:16:57,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:16:57,796 INFO L225 Difference]: With dead ends: 1872 [2021-02-19 20:16:57,796 INFO L226 Difference]: Without dead ends: 1753 [2021-02-19 20:16:57,797 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:16:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-02-19 20:16:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 909. [2021-02-19 20:16:57,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 2.0066079295154187) internal successors, (1822), 908 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:16:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1822 transitions. [2021-02-19 20:16:57,810 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1822 transitions. Word has length 39 [2021-02-19 20:16:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:16:57,811 INFO L480 AbstractCegarLoop]: Abstraction has 909 states and 1822 transitions. [2021-02-19 20:16:57,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-02-19 20:16:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1822 transitions. [2021-02-19 20:16:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:16:57,812 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:16:57,812 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:16:58,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-02-19 20:16:58,013 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:16:58,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:16:58,013 INFO L82 PathProgramCache]: Analyzing trace with hash -660133291, now seen corresponding path program 63 times [2021-02-19 20:16:58,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:16:58,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069352674] [2021-02-19 20:16:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:16:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:16:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:58,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069352674] [2021-02-19 20:16:58,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995892619] [2021-02-19 20:16:58,355 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 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 [2021-02-19 20:16:58,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 20:16:58,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:16:58,382 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 20:16:58,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:16:59,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:59,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:59,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:59,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:59,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:59,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:16:59,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:16:59,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-02-19 20:16:59,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:16:59,279 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-02-19 20:16:59,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:16:59,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-02-19 20:16:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:16:59,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:16:59,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-02-19 20:16:59,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959178341] [2021-02-19 20:16:59,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 20:16:59,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:16:59,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 20:16:59,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-02-19 20:16:59,300 INFO L87 Difference]: Start difference. First operand 909 states and 1822 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-02-19 20:17:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:00,788 INFO L93 Difference]: Finished difference Result 1820 states and 3665 transitions. [2021-02-19 20:17:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 20:17:00,789 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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 [2021-02-19 20:17:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:00,791 INFO L225 Difference]: With dead ends: 1820 [2021-02-19 20:17:00,791 INFO L226 Difference]: Without dead ends: 1562 [2021-02-19 20:17:00,791 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 20:17:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-02-19 20:17:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1014. [2021-02-19 20:17:00,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 1.998025666337611) internal successors, (2024), 1013 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 2024 transitions. [2021-02-19 20:17:00,804 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 2024 transitions. Word has length 39 [2021-02-19 20:17:00,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:00,804 INFO L480 AbstractCegarLoop]: Abstraction has 1014 states and 2024 transitions. [2021-02-19 20:17:00,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-02-19 20:17:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 2024 transitions. [2021-02-19 20:17:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:17:00,805 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:00,805 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:01,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 20:17:01,006 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:01,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:01,007 INFO L82 PathProgramCache]: Analyzing trace with hash 464427093, now seen corresponding path program 64 times [2021-02-19 20:17:01,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:01,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114425452] [2021-02-19 20:17:01,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:01,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114425452] [2021-02-19 20:17:01,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044608196] [2021-02-19 20:17:01,312 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 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 [2021-02-19 20:17:01,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:17:01,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:01,336 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 20:17:01,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:01,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:01,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:01,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:01,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:01,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:01,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:02,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:02,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:02,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:02,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:02,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:02,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 20:17:02,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:02,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:02,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:02,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 20:17:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:02,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:02,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-02-19 20:17:02,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849997850] [2021-02-19 20:17:02,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:17:02,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:02,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:17:02,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:17:02,061 INFO L87 Difference]: Start difference. First operand 1014 states and 2024 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-02-19 20:17:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:02,781 INFO L93 Difference]: Finished difference Result 2251 states and 4593 transitions. [2021-02-19 20:17:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 20:17:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 [2021-02-19 20:17:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:02,785 INFO L225 Difference]: With dead ends: 2251 [2021-02-19 20:17:02,785 INFO L226 Difference]: Without dead ends: 2191 [2021-02-19 20:17:02,785 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:17:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-02-19 20:17:02,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 981. [2021-02-19 20:17:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.993877551020408) internal successors, (1954), 980 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:02,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1954 transitions. [2021-02-19 20:17:02,806 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1954 transitions. Word has length 39 [2021-02-19 20:17:02,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:02,806 INFO L480 AbstractCegarLoop]: Abstraction has 981 states and 1954 transitions. [2021-02-19 20:17:02,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-02-19 20:17:02,806 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1954 transitions. [2021-02-19 20:17:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:17:02,808 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:02,808 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:03,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 20:17:03,032 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:03,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1164802475, now seen corresponding path program 65 times [2021-02-19 20:17:03,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:03,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927231830] [2021-02-19 20:17:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:03,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927231830] [2021-02-19 20:17:03,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613855150] [2021-02-19 20:17:03,399 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 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 [2021-02-19 20:17:03,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 20:17:03,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:03,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 60 conjunts are in the unsatisfiable core [2021-02-19 20:17:03,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:04,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:04,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:04,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:04,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:04,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:04,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:04,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:04,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 48 [2021-02-19 20:17:04,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:04,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:04,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:04,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-02-19 20:17:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 1 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:04,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:04,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-02-19 20:17:04,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862730010] [2021-02-19 20:17:04,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:17:04,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:04,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:17:04,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:17:04,201 INFO L87 Difference]: Start difference. First operand 981 states and 1954 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-02-19 20:17:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:04,809 INFO L93 Difference]: Finished difference Result 2300 states and 4703 transitions. [2021-02-19 20:17:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 20:17:04,810 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 [2021-02-19 20:17:04,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:04,812 INFO L225 Difference]: With dead ends: 2300 [2021-02-19 20:17:04,812 INFO L226 Difference]: Without dead ends: 2051 [2021-02-19 20:17:04,812 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:17:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-02-19 20:17:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1032. [2021-02-19 20:17:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 1.991270611057226) internal successors, (2053), 1031 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 2053 transitions. [2021-02-19 20:17:04,827 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 2053 transitions. Word has length 39 [2021-02-19 20:17:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:04,827 INFO L480 AbstractCegarLoop]: Abstraction has 1032 states and 2053 transitions. [2021-02-19 20:17:04,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-02-19 20:17:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 2053 transitions. [2021-02-19 20:17:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:17:04,828 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:04,828 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:05,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:05,029 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1505785403, now seen corresponding path program 66 times [2021-02-19 20:17:05,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:05,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330914624] [2021-02-19 20:17:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:05,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:05,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330914624] [2021-02-19 20:17:05,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748853570] [2021-02-19 20:17:05,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:17:05,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 20:17:05,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:05,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-02-19 20:17:05,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:06,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:06,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:06,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:06,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:06,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:06,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:06,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 48 [2021-02-19 20:17:06,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:06,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:06,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:06,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-02-19 20:17:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:06,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:06,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-02-19 20:17:06,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170396316] [2021-02-19 20:17:06,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:17:06,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:06,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:17:06,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:17:06,192 INFO L87 Difference]: Start difference. First operand 1032 states and 2053 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-02-19 20:17:06,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:06,672 INFO L93 Difference]: Finished difference Result 1617 states and 3265 transitions. [2021-02-19 20:17:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 20:17:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 [2021-02-19 20:17:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:06,675 INFO L225 Difference]: With dead ends: 1617 [2021-02-19 20:17:06,675 INFO L226 Difference]: Without dead ends: 1595 [2021-02-19 20:17:06,675 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:17:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-02-19 20:17:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1035. [2021-02-19 20:17:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 1.9912959381044488) internal successors, (2059), 1034 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 2059 transitions. [2021-02-19 20:17:06,691 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 2059 transitions. Word has length 39 [2021-02-19 20:17:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:06,691 INFO L480 AbstractCegarLoop]: Abstraction has 1035 states and 2059 transitions. [2021-02-19 20:17:06,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-02-19 20:17:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 2059 transitions. [2021-02-19 20:17:06,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:17:06,693 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:06,693 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:06,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:06,916 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:06,917 INFO L82 PathProgramCache]: Analyzing trace with hash 570458805, now seen corresponding path program 67 times [2021-02-19 20:17:06,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:06,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002634351] [2021-02-19 20:17:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:07,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002634351] [2021-02-19 20:17:07,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621026714] [2021-02-19 20:17:07,330 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 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 [2021-02-19 20:17:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:07,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 20:17:07,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:07,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:07,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:07,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:07,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:08,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:08,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:08,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:08,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 20:17:08,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:08,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:08,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:08,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 20:17:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:08,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:08,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-02-19 20:17:08,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628993550] [2021-02-19 20:17:08,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:17:08,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:08,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:17:08,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:17:08,042 INFO L87 Difference]: Start difference. First operand 1035 states and 2059 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:08,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:08,645 INFO L93 Difference]: Finished difference Result 2747 states and 5694 transitions. [2021-02-19 20:17:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:17:08,646 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-02-19 20:17:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:08,649 INFO L225 Difference]: With dead ends: 2747 [2021-02-19 20:17:08,649 INFO L226 Difference]: Without dead ends: 2607 [2021-02-19 20:17:08,649 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:17:08,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-02-19 20:17:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 627. [2021-02-19 20:17:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.0527156549520766) internal successors, (1285), 626 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1285 transitions. [2021-02-19 20:17:08,662 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1285 transitions. Word has length 39 [2021-02-19 20:17:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:08,662 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 1285 transitions. [2021-02-19 20:17:08,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1285 transitions. [2021-02-19 20:17:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:17:08,663 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:08,663 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:08,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:08,863 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:08,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:08,864 INFO L82 PathProgramCache]: Analyzing trace with hash -540832379, now seen corresponding path program 68 times [2021-02-19 20:17:08,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:08,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408091286] [2021-02-19 20:17:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:09,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408091286] [2021-02-19 20:17:09,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853522503] [2021-02-19 20:17:09,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:17:09,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:17:09,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:09,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 20:17:09,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:09,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:09,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:09,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:09,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:09,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:09,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 20:17:09,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:09,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:09,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:09,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 20:17:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:09,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:09,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-02-19 20:17:09,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734415426] [2021-02-19 20:17:09,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:17:09,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:09,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:17:09,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:17:09,940 INFO L87 Difference]: Start difference. First operand 627 states and 1285 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:10,534 INFO L93 Difference]: Finished difference Result 1967 states and 4094 transitions. [2021-02-19 20:17:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:17:10,535 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-02-19 20:17:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:10,537 INFO L225 Difference]: With dead ends: 1967 [2021-02-19 20:17:10,537 INFO L226 Difference]: Without dead ends: 1906 [2021-02-19 20:17:10,537 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:17:10,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-02-19 20:17:10,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 612. [2021-02-19 20:17:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.0540098199672667) internal successors, (1255), 611 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1255 transitions. [2021-02-19 20:17:10,547 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1255 transitions. Word has length 39 [2021-02-19 20:17:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:10,547 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 1255 transitions. [2021-02-19 20:17:10,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1255 transitions. [2021-02-19 20:17:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:17:10,548 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:10,548 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:10,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-02-19 20:17:10,748 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:10,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:10,749 INFO L82 PathProgramCache]: Analyzing trace with hash -881815307, now seen corresponding path program 69 times [2021-02-19 20:17:10,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:10,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002412226] [2021-02-19 20:17:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:11,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002412226] [2021-02-19 20:17:11,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444950088] [2021-02-19 20:17:11,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:11,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 20:17:11,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:11,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 20:17:11,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:12,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:12,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:12,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:12,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:12,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:12,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:12,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 20:17:12,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:12,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:12,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:12,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 20:17:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:12,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:12,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-02-19 20:17:12,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910853378] [2021-02-19 20:17:12,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:17:12,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:12,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:17:12,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:17:12,078 INFO L87 Difference]: Start difference. First operand 612 states and 1255 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:12,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:12,678 INFO L93 Difference]: Finished difference Result 1635 states and 3410 transitions. [2021-02-19 20:17:12,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:17:12,678 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-02-19 20:17:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:12,680 INFO L225 Difference]: With dead ends: 1635 [2021-02-19 20:17:12,680 INFO L226 Difference]: Without dead ends: 1571 [2021-02-19 20:17:12,680 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:17:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-02-19 20:17:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 591. [2021-02-19 20:17:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 2.0610169491525423) internal successors, (1216), 590 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1216 transitions. [2021-02-19 20:17:12,687 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1216 transitions. Word has length 39 [2021-02-19 20:17:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:12,687 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1216 transitions. [2021-02-19 20:17:12,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1216 transitions. [2021-02-19 20:17:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:17:12,688 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:12,688 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:12,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:12,889 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1649392619, now seen corresponding path program 70 times [2021-02-19 20:17:12,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:12,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692844651] [2021-02-19 20:17:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:13,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692844651] [2021-02-19 20:17:13,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734442124] [2021-02-19 20:17:13,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:17:13,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:17:13,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:13,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 20:17:13,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:13,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:13,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:13,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:13,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:13,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:13,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-02-19 20:17:13,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:13,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:13,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:13,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-02-19 20:17:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:13,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:13,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-02-19 20:17:13,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756860516] [2021-02-19 20:17:13,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 20:17:13,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:13,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 20:17:13,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-02-19 20:17:13,960 INFO L87 Difference]: Start difference. First operand 591 states and 1216 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:15,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:15,069 INFO L93 Difference]: Finished difference Result 1504 states and 3047 transitions. [2021-02-19 20:17:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:17:15,070 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 20:17:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:15,071 INFO L225 Difference]: With dead ends: 1504 [2021-02-19 20:17:15,071 INFO L226 Difference]: Without dead ends: 1174 [2021-02-19 20:17:15,071 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:17:15,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-02-19 20:17:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 684. [2021-02-19 20:17:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.0439238653001466) internal successors, (1396), 683 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1396 transitions. [2021-02-19 20:17:15,081 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1396 transitions. Word has length 39 [2021-02-19 20:17:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:15,082 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1396 transitions. [2021-02-19 20:17:15,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:15,082 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1396 transitions. [2021-02-19 20:17:15,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:17:15,082 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:15,082 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:15,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:15,286 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:15,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:15,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2140905493, now seen corresponding path program 71 times [2021-02-19 20:17:15,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:15,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005974009] [2021-02-19 20:17:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:15,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005974009] [2021-02-19 20:17:15,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300704368] [2021-02-19 20:17:15,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:15,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 20:17:15,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:15,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 55 conjunts are in the unsatisfiable core [2021-02-19 20:17:15,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:49,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:49,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:49,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:49,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:49,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:49,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:17:49,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:49,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 48 [2021-02-19 20:17:49,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:49,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:49,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:49,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:139, output treesize:7 [2021-02-19 20:17:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 80 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:49,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:49,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-02-19 20:17:49,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560701788] [2021-02-19 20:17:49,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:17:49,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:17:49,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=826, Unknown=12, NotChecked=0, Total=930 [2021-02-19 20:17:49,354 INFO L87 Difference]: Start difference. First operand 684 states and 1396 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:09,169 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-02-19 20:18:21,949 WARN L202 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-02-19 20:18:49,852 WARN L202 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-02-19 20:20:26,888 WARN L202 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-02-19 20:21:04,764 WARN L202 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-02-19 20:21:36,905 WARN L202 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 20:22:26,169 WARN L202 SmtUtils]: Spent 13.26 s on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-02-19 20:23:12,787 WARN L202 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 75 DAG size of output: 68 Received shutdown request... [2021-02-19 20:24:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:24:56,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:24:56,102 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 20:24:56,105 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 20:24:56,106 INFO L202 PluginConnector]: Adding new model send-receive-alt-tDQ.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 08:24:56 BasicIcfg [2021-02-19 20:24:56,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 20:24:56,107 INFO L168 Benchmark]: Toolchain (without parser) took 559906.38 ms. Allocated memory was 333.4 MB in the beginning and 503.3 MB in the end (delta: 169.9 MB). Free memory was 313.5 MB in the beginning and 417.2 MB in the end (delta: -103.7 MB). Peak memory consumption was 67.3 MB. Max. memory is 16.0 GB. [2021-02-19 20:24:56,107 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 333.4 MB. Free memory was 314.7 MB in the beginning and 314.6 MB in the end (delta: 77.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:24:56,107 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.25 ms. Allocated memory is still 333.4 MB. Free memory was 313.0 MB in the beginning and 311.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:24:56,107 INFO L168 Benchmark]: Boogie Preprocessor took 20.87 ms. Allocated memory is still 333.4 MB. Free memory was 311.6 MB in the beginning and 310.7 MB in the end (delta: 941.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:24:56,107 INFO L168 Benchmark]: RCFGBuilder took 371.48 ms. Allocated memory is still 333.4 MB. Free memory was 310.6 MB in the beginning and 298.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-02-19 20:24:56,107 INFO L168 Benchmark]: TraceAbstraction took 559466.96 ms. Allocated memory was 333.4 MB in the beginning and 503.3 MB in the end (delta: 169.9 MB). Free memory was 298.2 MB in the beginning and 417.2 MB in the end (delta: -119.1 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.0 GB. [2021-02-19 20:24:56,108 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 0.20 ms. Allocated memory is still 333.4 MB. Free memory was 314.7 MB in the beginning and 314.6 MB in the end (delta: 77.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 34.25 ms. Allocated memory is still 333.4 MB. Free memory was 313.0 MB in the beginning and 311.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.87 ms. Allocated memory is still 333.4 MB. Free memory was 311.6 MB in the beginning and 310.7 MB in the end (delta: 941.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 371.48 ms. Allocated memory is still 333.4 MB. Free memory was 310.6 MB in the beginning and 298.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 559466.96 ms. Allocated memory was 333.4 MB in the beginning and 503.3 MB in the end (delta: 169.9 MB). Free memory was 298.2 MB in the beginning and 417.2 MB in the end (delta: -119.1 MB). Peak memory consumption was 50.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 59). Cancelled while BasicCegarLoop was constructing difference of abstraction (684states) and FLOYD_HOARE automaton (currently 41 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 53 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 559.3s, OverallIterations: 77, TraceHistogramMax: 7, AutomataDifference: 456.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4495 SDtfs, 7225 SDslu, 52087 SDs, 0 SdLazy, 30428 SolverSat, 1277 SolverUnsat, 71 SolverUnknown, 0 SolverNotchecked, 272.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3411 GetRequests, 1694 SyntacticMatches, 193 SemanticMatches, 1523 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8920 ImplicationChecksByTransitivity, 234.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1216occurred in iteration=61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 76 MinimizatonAttempts, 34541 StatesRemovedByMinimization, 74 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 82.8s InterpolantComputationTime, 4764 NumberOfCodeBlocks, 4764 NumberOfCodeBlocksAsserted, 341 NumberOfCheckSat, 4614 ConstructedInterpolants, 215 QuantifiedInterpolants, 4199960 SizeOfPredicates, 85 NumberOfNonLiveVariables, 5956 ConjunctsInSsa, 3059 ConjunctsInUnsatCore, 150 InterpolantComputations, 4 PerfectInterpolantSequences, 325/7863 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