/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:14:34,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:14:34,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:14:34,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:14:34,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 16:14:34,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 16:14:34,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 16:14:34,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 16:14:34,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 16:14:34,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 16:14:34,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 16:14:34,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 16:14:34,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 16:14:34,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 16:14:34,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 16:14:34,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 16:14:34,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 16:14:34,390 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-Separate.epf [2021-06-05 16:14:34,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:14:34,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:14:34,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:14:34,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:14:34,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:14:34,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:14:34,424 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:14:34,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:14:34,425 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:14:34,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:14:34,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:14:34,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:14:34,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:14:34,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:14:34,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:14:34,425 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:14:34,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:14:34,426 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:14:34,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:14:34,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:14:34,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:14:34,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:14:34,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:14:34,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:14:34,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:14:34,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:14:34,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:14:34,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:14:34,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:14:34,427 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:14:34,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:14:34,427 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:14:34,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:14:34,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:14:34,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:14:34,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:14:34,742 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:14:34,745 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:14:34,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl [2021-06-05 16:14:34,746 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl' [2021-06-05 16:14:34,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:14:34,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:14:34,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:14:34,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:14:34,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:14:34,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:14:34" (1/1) ... [2021-06-05 16:14:34,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:14:34" (1/1) ... [2021-06-05 16:14:34,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:14:34,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:14:34,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:14:34,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:14:34,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:14:34" (1/1) ... [2021-06-05 16:14:34,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:14:34" (1/1) ... [2021-06-05 16:14:34,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:14:34" (1/1) ... [2021-06-05 16:14:34,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:14:34" (1/1) ... [2021-06-05 16:14:34,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:14:34" (1/1) ... [2021-06-05 16:14:34,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:14:34" (1/1) ... [2021-06-05 16:14:34,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:14:34" (1/1) ... [2021-06-05 16:14:34,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:14:34,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:14:34,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:14:34,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:14:34,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:14:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:14:34,881 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:14:34,881 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:14:34,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:14:34,881 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:14:34,882 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:14:34,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:14:34,882 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:14:34,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:14:34,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:14:34,882 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:14:35,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:14:35,041 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:14:35,042 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:14:35 BoogieIcfgContainer [2021-06-05 16:14:35,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:14:35,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:14:35,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:14:35,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:14:35,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:14:34" (1/2) ... [2021-06-05 16:14:35,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca2052e and model type dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:14:35, skipping insertion in model container [2021-06-05 16:14:35,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:14:35" (2/2) ... [2021-06-05 16:14:35,048 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq-array.wvr.bpl [2021-06-05 16:14:35,053 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:14:35,053 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:14:35,053 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:14:35,054 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:14:35,080 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 16:14:35,096 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 16:14:35,119 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:14:35,119 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:14:35,119 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:14:35,119 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:14:35,119 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:14:35,119 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:14:35,119 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:14:35,120 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:14:35,127 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-06-05 16:14:35,139 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:35,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 16:14:35,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:35,146 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:35,147 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:35,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-06-05 16:14:35,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:35,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470022332] [2021-06-05 16:14:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:35,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:35,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470022332] [2021-06-05 16:14:35,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470022332] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:14:35,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:14:35,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:14:35,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889716786] [2021-06-05 16:14:35,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:14:35,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:35,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:14:35,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:14:35,288 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:35,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:35,309 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-06-05 16:14:35,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:14:35,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 16:14:35,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:35,318 INFO L225 Difference]: With dead ends: 104 [2021-06-05 16:14:35,318 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 16:14:35,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:14:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 16:14:35,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-06-05 16:14:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-06-05 16:14:35,355 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-06-05 16:14:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:35,355 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-06-05 16:14:35,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-06-05 16:14:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:14:35,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:35,356 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:35,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:14:35,357 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:35,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:35,358 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-06-05 16:14:35,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:35,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409873874] [2021-06-05 16:14:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:35,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:35,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409873874] [2021-06-05 16:14:35,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409873874] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:14:35,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:14:35,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:14:35,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292196685] [2021-06-05 16:14:35,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:14:35,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:35,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:14:35,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:14:35,419 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:35,459 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-06-05 16:14:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:14:35,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 16:14:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:35,464 INFO L225 Difference]: With dead ends: 91 [2021-06-05 16:14:35,464 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 16:14:35,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:14:35,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 16:14:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-06-05 16:14:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-06-05 16:14:35,475 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-06-05 16:14:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:35,476 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-06-05 16:14:35,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-06-05 16:14:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:14:35,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:35,477 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:35,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:14:35,478 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:35,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:35,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-06-05 16:14:35,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:35,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802408374] [2021-06-05 16:14:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:35,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:35,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802408374] [2021-06-05 16:14:35,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802408374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:35,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467632988] [2021-06-05 16:14:35,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:35,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:35,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:14:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:35,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 16:14:35,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:35,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:35,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:35,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 16:14:35,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:14:35,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:35,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:35,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:35,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-06-05 16:14:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:35,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467632988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:35,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:35,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:14:35,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535665067] [2021-06-05 16:14:35,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:14:35,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:35,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:14:35,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:14:35,980 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:36,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:36,114 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-06-05 16:14:36,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:14:36,116 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 16:14:36,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:36,121 INFO L225 Difference]: With dead ends: 154 [2021-06-05 16:14:36,121 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 16:14:36,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:14:36,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 16:14:36,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-06-05 16:14:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:36,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-06-05 16:14:36,141 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-06-05 16:14:36,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:36,141 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-06-05 16:14:36,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:36,141 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-06-05 16:14:36,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:14:36,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:36,143 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:36,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 16:14:36,344 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:36,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-06-05 16:14:36,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:36,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559966151] [2021-06-05 16:14:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:36,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:36,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559966151] [2021-06-05 16:14:36,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559966151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:36,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651830889] [2021-06-05 16:14:36,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:36,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:14:36,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:36,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 16:14:36,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:36,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651830889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:36,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:36,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 16:14:36,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635568034] [2021-06-05 16:14:36,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:14:36,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:36,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:14:36,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:14:36,581 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:36,668 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-06-05 16:14:36,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:14:36,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 16:14:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:36,671 INFO L225 Difference]: With dead ends: 284 [2021-06-05 16:14:36,671 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 16:14:36,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:14:36,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 16:14:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-06-05 16:14:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-06-05 16:14:36,702 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-06-05 16:14:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:36,702 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-06-05 16:14:36,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:36,703 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-06-05 16:14:36,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:14:36,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:36,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:36,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:36,908 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:36,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:36,908 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-06-05 16:14:36,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:36,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434152188] [2021-06-05 16:14:36,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:37,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:37,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434152188] [2021-06-05 16:14:37,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434152188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:37,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331234871] [2021-06-05 16:14:37,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:37,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:14:37,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:14:37,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:37,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:37,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-06-05 16:14:37,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:37,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:37,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:37,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-06-05 16:14:37,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:37,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2021-06-05 16:14:37,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:14:37,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:37,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:37,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-06-05 16:14:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:37,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331234871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:37,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:37,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-06-05 16:14:37,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797752855] [2021-06-05 16:14:37,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:14:37,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:37,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:14:37,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:14:37,978 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:39,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:39,937 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-06-05 16:14:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:14:39,947 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:14:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:39,950 INFO L225 Difference]: With dead ends: 650 [2021-06-05 16:14:39,950 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 16:14:39,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1669.1ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:14:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 16:14:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-06-05 16:14:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-06-05 16:14:39,969 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-06-05 16:14:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:39,970 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-06-05 16:14:39,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:39,973 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-06-05 16:14:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:14:39,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:39,976 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:40,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:40,177 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:40,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-06-05 16:14:40,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:40,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796356331] [2021-06-05 16:14:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:14:40,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:40,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796356331] [2021-06-05 16:14:40,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796356331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:40,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638422219] [2021-06-05 16:14:40,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:40,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:14:40,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:40,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:14:40,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:40,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:40,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 16:14:40,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:40,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:40,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:40,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 16:14:40,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:40,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:40,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 16:14:40,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:40,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:40,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:40,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 16:14:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:40,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638422219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:40,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:40,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 16:14:40,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185454609] [2021-06-05 16:14:40,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:14:40,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:40,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:14:40,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:14:40,903 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:41,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:41,603 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-06-05 16:14:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:14:41,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:14:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:41,608 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 16:14:41,608 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 16:14:41,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 614.3ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:14:41,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 16:14:41,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-06-05 16:14:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-06-05 16:14:41,623 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-06-05 16:14:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:41,623 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-06-05 16:14:41,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:41,623 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-06-05 16:14:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:14:41,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:41,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:41,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:41,847 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:41,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-06-05 16:14:41,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:41,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829923498] [2021-06-05 16:14:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:42,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:42,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829923498] [2021-06-05 16:14:42,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829923498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:42,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308745296] [2021-06-05 16:14:42,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:42,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:14:42,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:42,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:14:42,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:42,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:42,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 16:14:42,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:42,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:42,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:42,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-05 16:14:42,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:42,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:42,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 16:14:42,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:42,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:42,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:42,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 16:14:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:42,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308745296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:42,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:42,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 16:14:42,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175712879] [2021-06-05 16:14:42,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:14:42,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:42,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:14:42,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:14:42,508 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:43,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:43,290 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-06-05 16:14:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:14:43,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:14:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:43,295 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 16:14:43,295 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 16:14:43,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 690.4ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:14:43,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 16:14:43,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-06-05 16:14:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-06-05 16:14:43,308 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-06-05 16:14:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:43,309 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-06-05 16:14:43,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-06-05 16:14:43,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:14:43,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:43,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:43,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 16:14:43,525 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-06-05 16:14:43,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:43,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897686233] [2021-06-05 16:14:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:14:43,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897686233] [2021-06-05 16:14:43,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897686233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:43,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181532234] [2021-06-05 16:14:43,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:43,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:14:43,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:14:43,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:44,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:44,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 16:14:44,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:44,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:44,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:44,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-05 16:14:44,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:44,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:44,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:44,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-06-05 16:14:44,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:44,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:44,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:44,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 16:14:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:44,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181532234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:44,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:44,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-06-05 16:14:44,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453085397] [2021-06-05 16:14:44,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:14:44,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:14:44,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:14:44,194 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:44,742 INFO L93 Difference]: Finished difference Result 1039 states and 2202 transitions. [2021-06-05 16:14:44,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:14:44,743 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:14:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:44,746 INFO L225 Difference]: With dead ends: 1039 [2021-06-05 16:14:44,746 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 16:14:44,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:14:44,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 16:14:44,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 487. [2021-06-05 16:14:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1790123456790123) internal successors, (1059), 486 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1059 transitions. [2021-06-05 16:14:44,761 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1059 transitions. Word has length 32 [2021-06-05 16:14:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:44,761 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1059 transitions. [2021-06-05 16:14:44,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1059 transitions. [2021-06-05 16:14:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:14:44,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:44,763 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:44,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:44,973 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:44,973 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-06-05 16:14:44,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:44,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759048136] [2021-06-05 16:14:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:45,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:45,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759048136] [2021-06-05 16:14:45,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759048136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:45,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081665906] [2021-06-05 16:14:45,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:45,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:14:45,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:45,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:45,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 16:14:45,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:45,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:45,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:45,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 16:14:45,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:45,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:45,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:45,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 16:14:45,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:45,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:45,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:45,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 16:14:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:45,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081665906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:45,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:45,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 16:14:45,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007153526] [2021-06-05 16:14:45,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:14:45,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:14:45,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:14:45,635 INFO L87 Difference]: Start difference. First operand 487 states and 1059 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:46,237 INFO L93 Difference]: Finished difference Result 1050 states and 2227 transitions. [2021-06-05 16:14:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:14:46,238 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:14:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:46,241 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 16:14:46,241 INFO L226 Difference]: Without dead ends: 952 [2021-06-05 16:14:46,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:14:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-06-05 16:14:46,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 467. [2021-06-05 16:14:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.1609442060085837) internal successors, (1007), 466 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1007 transitions. [2021-06-05 16:14:46,255 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1007 transitions. Word has length 32 [2021-06-05 16:14:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:46,255 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1007 transitions. [2021-06-05 16:14:46,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1007 transitions. [2021-06-05 16:14:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:14:46,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:46,257 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:46,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:46,480 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:46,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-06-05 16:14:46,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:46,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674095638] [2021-06-05 16:14:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:46,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:46,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674095638] [2021-06-05 16:14:46,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674095638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:46,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602462572] [2021-06-05 16:14:46,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:46,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:14:46,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:46,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:14:46,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:46,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602462572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:46,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:46,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-05 16:14:46,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646945592] [2021-06-05 16:14:46,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:14:46,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:46,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:14:46,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:14:46,637 INFO L87 Difference]: Start difference. First operand 467 states and 1007 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:46,716 INFO L93 Difference]: Finished difference Result 885 states and 1908 transitions. [2021-06-05 16:14:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:14:46,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:14:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:46,720 INFO L225 Difference]: With dead ends: 885 [2021-06-05 16:14:46,720 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 16:14:46,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:14:46,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 16:14:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 716. [2021-06-05 16:14:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.1846153846153844) internal successors, (1562), 715 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:46,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1562 transitions. [2021-06-05 16:14:46,737 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1562 transitions. Word has length 36 [2021-06-05 16:14:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:46,737 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1562 transitions. [2021-06-05 16:14:46,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1562 transitions. [2021-06-05 16:14:46,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:14:46,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:46,739 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:46,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 16:14:46,953 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:46,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:46,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-06-05 16:14:46,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:46,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579064898] [2021-06-05 16:14:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:47,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:47,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579064898] [2021-06-05 16:14:47,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579064898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:47,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91802827] [2021-06-05 16:14:47,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:47,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:14:47,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:14:47,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:47,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:47,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2021-06-05 16:14:47,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:47,745 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.3 percent of original size [2021-06-05 16:14:47,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:47,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:32 [2021-06-05 16:14:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:48,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:48,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:48,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:48,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:14:48,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:14:48,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:48,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:48,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-06-05 16:14:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:48,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91802827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:48,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:48,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 16:14:48,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508224253] [2021-06-05 16:14:48,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 16:14:48,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:48,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 16:14:48,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:14:48,192 INFO L87 Difference]: Start difference. First operand 716 states and 1562 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:52,115 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-06-05 16:14:52,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 16:14:52,116 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:14:52,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:52,124 INFO L225 Difference]: With dead ends: 2812 [2021-06-05 16:14:52,125 INFO L226 Difference]: Without dead ends: 2548 [2021-06-05 16:14:52,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 3092.4ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 16:14:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-05 16:14:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-06-05 16:14:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-06-05 16:14:52,157 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-06-05 16:14:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:52,157 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-06-05 16:14:52,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-06-05 16:14:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:14:52,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:52,159 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:52,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:52,373 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:52,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-06-05 16:14:52,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:52,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741274420] [2021-06-05 16:14:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:14:52,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:52,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741274420] [2021-06-05 16:14:52,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741274420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:52,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537012521] [2021-06-05 16:14:52,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:52,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:14:52,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:52,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:14:52,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:53,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:53,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 16:14:53,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:53,537 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 16:14:53,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:53,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 16:14:53,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:53,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:53,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:53,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:54,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:54,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:54,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:54,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:54,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:54,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:54,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 16:14:54,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:54,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:54,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:54,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:54,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:54,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:54,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:54,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:54,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:54,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 16:14:54,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:54,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:54,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:54,034 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-06-05 16:14:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:54,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537012521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:54,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:54,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 16:14:54,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064863573] [2021-06-05 16:14:54,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:14:54,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:54,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:14:54,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:14:54,046 INFO L87 Difference]: Start difference. First operand 737 states and 1581 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:14:56,094 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-06-05 16:14:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:14:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:14:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:14:56,101 INFO L225 Difference]: With dead ends: 2302 [2021-06-05 16:14:56,101 INFO L226 Difference]: Without dead ends: 2145 [2021-06-05 16:14:56,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1982.5ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 16:14:56,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-05 16:14:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-06-05 16:14:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-06-05 16:14:56,126 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-06-05 16:14:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:14:56,126 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-06-05 16:14:56,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:14:56,126 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-06-05 16:14:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:14:56,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:14:56,128 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:14:56,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:56,342 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:14:56,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:14:56,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-06-05 16:14:56,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:14:56,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631895936] [2021-06-05 16:14:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:14:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:14:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:56,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:14:56,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631895936] [2021-06-05 16:14:56,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631895936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:56,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194681317] [2021-06-05 16:14:56,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:14:56,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:14:56,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:14:56,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:14:56,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:14:57,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:57,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 16:14:57,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:57,443 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.0 percent of original size [2021-06-05 16:14:57,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:14:57,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:57 [2021-06-05 16:14:57,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:57,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:57,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:57,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:57,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:57,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:57,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:14:57,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:14:57,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:14:57,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:14:57,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:14:57,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:14:57,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:5 [2021-06-05 16:14:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:14:57,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194681317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:14:57,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:14:57,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 16:14:57,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044094320] [2021-06-05 16:14:57,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 16:14:57,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:14:57,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 16:14:57,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:14:57,715 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:00,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:00,296 INFO L93 Difference]: Finished difference Result 2586 states and 5448 transitions. [2021-06-05 16:15:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:15:00,297 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:15:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:00,304 INFO L225 Difference]: With dead ends: 2586 [2021-06-05 16:15:00,304 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 16:15:00,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 2072.5ms TimeCoverageRelationStatistics Valid=836, Invalid=5326, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 16:15:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 16:15:00,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 746. [2021-06-05 16:15:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.153020134228188) internal successors, (1604), 745 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:00,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1604 transitions. [2021-06-05 16:15:00,327 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1604 transitions. Word has length 41 [2021-06-05 16:15:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:00,327 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1604 transitions. [2021-06-05 16:15:00,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1604 transitions. [2021-06-05 16:15:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:15:00,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:00,329 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:00,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:00,552 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:00,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:00,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-06-05 16:15:00,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:00,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3694046] [2021-06-05 16:15:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:15:00,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:00,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3694046] [2021-06-05 16:15:00,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3694046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:00,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552412583] [2021-06-05 16:15:00,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:00,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:15:00,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:00,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:15:00,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:01,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:01,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 16:15:01,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:01,782 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.7 percent of original size [2021-06-05 16:15:01,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:01,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:52, output treesize:53 [2021-06-05 16:15:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:03,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:03,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:03,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:03,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:03,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2021-06-05 16:15:03,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:15:03,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:03,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:03,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:03,331 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-06-05 16:15:03,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 1 [2021-06-05 16:15:03,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:03,367 INFO L628 ElimStorePlain]: treesize reduction 21, result has 59.6 percent of original size [2021-06-05 16:15:03,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:03,372 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:100, output treesize:21 [2021-06-05 16:15:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:03,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552412583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:03,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:03,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 16:15:03,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115279403] [2021-06-05 16:15:03,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 16:15:03,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:03,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 16:15:03,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:15:03,472 INFO L87 Difference]: Start difference. First operand 746 states and 1604 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:08,849 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 16:15:09,455 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 16:15:09,891 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 16:15:10,586 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 16:15:11,280 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 16:15:13,851 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 16:15:15,557 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 16:15:16,203 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 16:15:18,883 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-05 16:15:20,548 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 16:15:20,779 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-05 16:15:21,602 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 16:15:22,473 WARN L205 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 16:15:22,974 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 16:15:26,479 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-06-05 16:15:26,728 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 16:15:28,748 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-05 16:15:32,207 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 16:15:34,146 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 16:15:34,863 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 16:15:37,685 WARN L205 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 16:15:40,316 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:15:40,873 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 16:15:42,354 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 16:15:44,146 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 16:15:46,522 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-05 16:15:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:47,625 INFO L93 Difference]: Finished difference Result 3393 states and 7212 transitions. [2021-06-05 16:15:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 16:15:47,625 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:15:47,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:47,632 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 16:15:47,632 INFO L226 Difference]: Without dead ends: 3071 [2021-06-05 16:15:47,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5844 ImplicationChecksByTransitivity, 30185.9ms TimeCoverageRelationStatistics Valid=2687, Invalid=14342, Unknown=1, NotChecked=0, Total=17030 [2021-06-05 16:15:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-06-05 16:15:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 882. [2021-06-05 16:15:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.155505107832009) internal successors, (1899), 881 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1899 transitions. [2021-06-05 16:15:47,662 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1899 transitions. Word has length 41 [2021-06-05 16:15:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:47,662 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 1899 transitions. [2021-06-05 16:15:47,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1899 transitions. [2021-06-05 16:15:47,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:15:47,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:47,664 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:47,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:47,877 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:47,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:47,877 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-06-05 16:15:47,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:47,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222653189] [2021-06-05 16:15:47,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:15:48,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:48,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222653189] [2021-06-05 16:15:48,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222653189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:48,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947910824] [2021-06-05 16:15:48,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:48,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:15:48,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:48,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:48,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 16:15:48,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:48,995 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-06-05 16:15:49,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:49,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-06-05 16:15:49,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:49,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:49,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:49,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:49,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:49,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:49,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:49,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 16:15:49,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:49,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:49,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:49,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 16:15:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:49,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947910824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:49,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:49,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 16:15:49,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213434849] [2021-06-05 16:15:49,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:15:49,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:49,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:15:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:15:49,121 INFO L87 Difference]: Start difference. First operand 882 states and 1899 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:51,131 INFO L93 Difference]: Finished difference Result 3308 states and 7100 transitions. [2021-06-05 16:15:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:15:51,132 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:15:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:51,141 INFO L225 Difference]: With dead ends: 3308 [2021-06-05 16:15:51,141 INFO L226 Difference]: Without dead ends: 3100 [2021-06-05 16:15:51,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1622.4ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:15:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-06-05 16:15:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1074. [2021-06-05 16:15:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.1491146318732524) internal successors, (2306), 1073 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2306 transitions. [2021-06-05 16:15:51,171 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2306 transitions. Word has length 41 [2021-06-05 16:15:51,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:51,171 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 2306 transitions. [2021-06-05 16:15:51,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:51,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2306 transitions. [2021-06-05 16:15:51,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:15:51,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:51,174 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:51,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 16:15:51,389 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:51,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-06-05 16:15:51,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:51,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885325546] [2021-06-05 16:15:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:51,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:51,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885325546] [2021-06-05 16:15:51,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885325546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:51,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533014982] [2021-06-05 16:15:51,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:51,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:15:51,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:51,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:15:51,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:52,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:52,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 16:15:52,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:52,436 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 16:15:52,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:52,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 16:15:52,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:52,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:52,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:52,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:52,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:52,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:15:52,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 16:15:52,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:52,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:52,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:15:52,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 16:15:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:52,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533014982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:52,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:52,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 16:15:52,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690805037] [2021-06-05 16:15:52,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 16:15:52,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:52,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 16:15:52,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:15:52,635 INFO L87 Difference]: Start difference. First operand 1074 states and 2306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:15:55,309 INFO L93 Difference]: Finished difference Result 3729 states and 7998 transitions. [2021-06-05 16:15:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:15:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:15:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:15:55,321 INFO L225 Difference]: With dead ends: 3729 [2021-06-05 16:15:55,321 INFO L226 Difference]: Without dead ends: 3485 [2021-06-05 16:15:55,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1921.1ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:15:55,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-06-05 16:15:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 1340. [2021-06-05 16:15:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.1598207617625094) internal successors, (2892), 1339 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2892 transitions. [2021-06-05 16:15:55,357 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2892 transitions. Word has length 41 [2021-06-05 16:15:55,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:15:55,357 INFO L482 AbstractCegarLoop]: Abstraction has 1340 states and 2892 transitions. [2021-06-05 16:15:55,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:15:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2892 transitions. [2021-06-05 16:15:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:15:55,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:15:55,360 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:15:55,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:55,577 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:15:55,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:15:55,577 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-06-05 16:15:55,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:15:55,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290880217] [2021-06-05 16:15:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:15:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:15:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:55,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:15:55,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290880217] [2021-06-05 16:15:55,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290880217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:55,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446191982] [2021-06-05 16:15:55,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:15:55,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:15:55,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:15:55,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:15:55,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:15:56,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:56,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 16:15:56,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:56,460 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.4 percent of original size [2021-06-05 16:15:56,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:15:56,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:57 [2021-06-05 16:15:56,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:56,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:56,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:56,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:56,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:56,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:15:56,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-06-05 16:15:56,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:15:56,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:56,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:56,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:56,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:56,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:15:56,999 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-06-05 16:15:57,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 16:15:57,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:15:57,089 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-06-05 16:15:57,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:15:57,103 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-06-05 16:15:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:15:57,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446191982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:15:57,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:15:57,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-06-05 16:15:57,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187060341] [2021-06-05 16:15:57,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 16:15:57,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:15:57,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 16:15:57,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:15:57,228 INFO L87 Difference]: Start difference. First operand 1340 states and 2892 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:00,603 INFO L93 Difference]: Finished difference Result 3544 states and 7640 transitions. [2021-06-05 16:16:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:16:00,603 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:16:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:00,609 INFO L225 Difference]: With dead ends: 3544 [2021-06-05 16:16:00,609 INFO L226 Difference]: Without dead ends: 3383 [2021-06-05 16:16:00,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2807.7ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:16:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-06-05 16:16:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 1483. [2021-06-05 16:16:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.163292847503374) internal successors, (3206), 1482 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3206 transitions. [2021-06-05 16:16:00,641 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3206 transitions. Word has length 41 [2021-06-05 16:16:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:00,641 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 3206 transitions. [2021-06-05 16:16:00,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:00,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3206 transitions. [2021-06-05 16:16:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 16:16:00,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:00,644 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:00,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 16:16:00,866 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:00,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-06-05 16:16:00,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:00,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52059636] [2021-06-05 16:16:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:00,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:00,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52059636] [2021-06-05 16:16:00,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52059636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:00,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253330082] [2021-06-05 16:16:00,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:00,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:16:00,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:00,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:16:00,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:01,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253330082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:01,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:01,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-05 16:16:01,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940460085] [2021-06-05 16:16:01,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:16:01,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:01,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:16:01,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:16:01,028 INFO L87 Difference]: Start difference. First operand 1483 states and 3206 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:01,099 INFO L93 Difference]: Finished difference Result 2019 states and 4365 transitions. [2021-06-05 16:16:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:16:01,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 16:16:01,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:01,103 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 16:16:01,103 INFO L226 Difference]: Without dead ends: 1969 [2021-06-05 16:16:01,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:16:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2021-06-05 16:16:01,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1621. [2021-06-05 16:16:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.175925925925926) internal successors, (3525), 1620 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3525 transitions. [2021-06-05 16:16:01,129 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3525 transitions. Word has length 45 [2021-06-05 16:16:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:01,129 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3525 transitions. [2021-06-05 16:16:01,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3525 transitions. [2021-06-05 16:16:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:16:01,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:01,132 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:01,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:01,354 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:01,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-06-05 16:16:01,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:01,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876030833] [2021-06-05 16:16:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 16:16:01,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:01,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876030833] [2021-06-05 16:16:01,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876030833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:01,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270792520] [2021-06-05 16:16:01,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:01,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:16:01,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:01,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:16:01,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 16:16:01,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270792520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:01,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:01,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 16:16:01,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191110928] [2021-06-05 16:16:01,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:16:01,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:01,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:16:01,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:16:01,506 INFO L87 Difference]: Start difference. First operand 1621 states and 3525 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:01,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:01,529 INFO L93 Difference]: Finished difference Result 2104 states and 4548 transitions. [2021-06-05 16:16:01,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:16:01,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:16:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:01,532 INFO L225 Difference]: With dead ends: 2104 [2021-06-05 16:16:01,532 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 16:16:01,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:16:01,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 16:16:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1445. [2021-06-05 16:16:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.1717451523545708) internal successors, (3136), 1444 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 3136 transitions. [2021-06-05 16:16:01,556 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 3136 transitions. Word has length 46 [2021-06-05 16:16:01,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:01,556 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 3136 transitions. [2021-06-05 16:16:01,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:01,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 3136 transitions. [2021-06-05 16:16:01,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:16:01,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:01,559 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:01,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:01,782 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:01,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-06-05 16:16:01,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:01,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053229617] [2021-06-05 16:16:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:16:01,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:01,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053229617] [2021-06-05 16:16:01,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053229617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:01,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295320465] [2021-06-05 16:16:01,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:01,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:16:01,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:01,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:16:01,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:16:01,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295320465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:01,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:01,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:16:01,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68586696] [2021-06-05 16:16:01,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:16:01,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:01,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:16:01,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:16:01,926 INFO L87 Difference]: Start difference. First operand 1445 states and 3136 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:01,955 INFO L93 Difference]: Finished difference Result 1604 states and 3442 transitions. [2021-06-05 16:16:01,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:16:01,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 16:16:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:01,958 INFO L225 Difference]: With dead ends: 1604 [2021-06-05 16:16:01,958 INFO L226 Difference]: Without dead ends: 1604 [2021-06-05 16:16:01,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:16:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-06-05 16:16:01,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1207. [2021-06-05 16:16:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 2.1550580431177444) internal successors, (2599), 1206 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2599 transitions. [2021-06-05 16:16:01,977 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2599 transitions. Word has length 46 [2021-06-05 16:16:01,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:01,977 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2599 transitions. [2021-06-05 16:16:01,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:01,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2599 transitions. [2021-06-05 16:16:01,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 16:16:01,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:01,980 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:02,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 16:16:02,202 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:02,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:02,202 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-06-05 16:16:02,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:02,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787718653] [2021-06-05 16:16:02,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:02,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:02,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787718653] [2021-06-05 16:16:02,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787718653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:02,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375709067] [2021-06-05 16:16:02,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:02,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 16:16:02,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:03,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:03,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2021-06-05 16:16:03,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:03,506 INFO L628 ElimStorePlain]: treesize reduction 86, result has 58.7 percent of original size [2021-06-05 16:16:03,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:16:03,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:48 [2021-06-05 16:16:03,915 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:16:03,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-06-05 16:16:03,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:03,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:03,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:03,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-06-05 16:16:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:03,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375709067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:03,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:03,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-06-05 16:16:03,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514545270] [2021-06-05 16:16:03,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 16:16:03,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:03,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 16:16:03,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:16:03,929 INFO L87 Difference]: Start difference. First operand 1207 states and 2599 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:07,278 INFO L93 Difference]: Finished difference Result 2755 states and 5872 transitions. [2021-06-05 16:16:07,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:16:07,278 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 16:16:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:07,283 INFO L225 Difference]: With dead ends: 2755 [2021-06-05 16:16:07,283 INFO L226 Difference]: Without dead ends: 2659 [2021-06-05 16:16:07,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2686.6ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 16:16:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-06-05 16:16:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 1299. [2021-06-05 16:16:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.1656394453004624) internal successors, (2811), 1298 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2811 transitions. [2021-06-05 16:16:07,309 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2811 transitions. Word has length 50 [2021-06-05 16:16:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:07,309 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 2811 transitions. [2021-06-05 16:16:07,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:07,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2811 transitions. [2021-06-05 16:16:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 16:16:07,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:07,312 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:07,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:07,534 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:07,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:07,534 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-06-05 16:16:07,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:07,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298262714] [2021-06-05 16:16:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:16:08,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:08,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298262714] [2021-06-05 16:16:08,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298262714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:08,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118281458] [2021-06-05 16:16:08,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:08,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:16:08,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:08,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 16:16:08,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:09,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:09,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-06-05 16:16:09,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:09,388 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-06-05 16:16:09,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:16:09,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-06-05 16:16:09,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:09,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:09,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:09,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:09,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-06-05 16:16:09,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:09,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:09,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:09,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:09,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 16:16:09,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:09,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:09,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:16:09,943 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-06-05 16:16:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:09,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118281458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:09,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:09,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-06-05 16:16:09,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742720515] [2021-06-05 16:16:09,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 16:16:09,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:09,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 16:16:09,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:16:09,952 INFO L87 Difference]: Start difference. First operand 1299 states and 2811 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:16:15,567 INFO L93 Difference]: Finished difference Result 3297 states and 7007 transitions. [2021-06-05 16:16:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 16:16:15,568 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 16:16:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:16:15,572 INFO L225 Difference]: With dead ends: 3297 [2021-06-05 16:16:15,572 INFO L226 Difference]: Without dead ends: 3184 [2021-06-05 16:16:15,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4558.7ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 16:16:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-06-05 16:16:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 1653. [2021-06-05 16:16:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.151331719128329) internal successors, (3554), 1652 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3554 transitions. [2021-06-05 16:16:15,603 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3554 transitions. Word has length 50 [2021-06-05 16:16:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:16:15,604 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 3554 transitions. [2021-06-05 16:16:15,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:16:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3554 transitions. [2021-06-05 16:16:15,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 16:16:15,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:16:15,607 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:16:15,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 16:16:15,828 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:16:15,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:16:15,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-06-05 16:16:15,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:16:15,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439402530] [2021-06-05 16:16:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:16:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:16:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:16,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:16:16,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439402530] [2021-06-05 16:16:16,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439402530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:16,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017847495] [2021-06-05 16:16:16,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:16:16,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:16:16,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:16:16,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 16:16:16,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:16:19,591 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 16:16:19,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:19,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 16:16:19,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:19,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:19,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 16:16:19,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:19,997 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2021-06-05 16:16:19,998 INFO L628 ElimStorePlain]: treesize reduction 124, result has 69.2 percent of original size [2021-06-05 16:16:20,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-06-05 16:16:20,113 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:150 [2021-06-05 16:16:28,775 WARN L205 SmtUtils]: Spent 4.55 s on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 16:16:48,805 WARN L205 SmtUtils]: Spent 14.57 s on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 16:16:49,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:49,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:49,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:49,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:49,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:16:49,202 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-06-05 16:16:49,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-06-05 16:16:49,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:16:49,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:49,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:49,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:16:49,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:16:49,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-06-05 16:16:51,214 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-06-05 16:16:51,425 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-06-05 16:16:51,626 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 269 [2021-06-05 16:16:52,699 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 61 [2021-06-05 16:16:52,841 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-05 16:16:52,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 16:16:53,089 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 73 [2021-06-05 16:16:53,089 INFO L628 ElimStorePlain]: treesize reduction 474, result has 24.8 percent of original size [2021-06-05 16:16:53,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:16:53,155 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:47 [2021-06-05 16:16:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:16:53,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017847495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:16:53,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:16:53,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-06-05 16:16:53,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148582126] [2021-06-05 16:16:53,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 16:16:53,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:16:53,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 16:16:53,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2269, Unknown=2, NotChecked=0, Total=2550 [2021-06-05 16:16:53,286 INFO L87 Difference]: Start difference. First operand 1653 states and 3554 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:17:08,071 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 16:17:14,618 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 137 DAG size of output: 40 [2021-06-05 16:17:15,966 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 16:17:24,821 WARN L205 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 142 DAG size of output: 42 [2021-06-05 16:17:27,803 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 16:17:39,113 WARN L205 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2021-06-05 16:17:43,838 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 16:17:51,255 WARN L205 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 16:17:58,781 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-06-05 16:18:06,605 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 134 DAG size of output: 44 [2021-06-05 16:18:22,489 WARN L205 SmtUtils]: Spent 10.47 s on a formula simplification. DAG size of input: 126 DAG size of output: 73 [2021-06-05 16:18:29,131 WARN L205 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 124 DAG size of output: 46 [2021-06-05 16:18:45,476 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 55 [2021-06-05 16:18:50,647 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 73 [2021-06-05 16:18:57,304 WARN L205 SmtUtils]: Spent 5.63 s on a formula simplification. DAG size of input: 126 DAG size of output: 48 [2021-06-05 16:19:09,527 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-06-05 16:19:16,855 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2021-06-05 16:19:21,609 WARN L205 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-06-05 16:19:31,063 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 123 DAG size of output: 51 [2021-06-05 16:19:40,510 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 16:19:45,395 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2021-06-05 16:20:02,125 WARN L205 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 125 DAG size of output: 53 [2021-06-05 16:20:17,437 WARN L205 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 131 DAG size of output: 51 [2021-06-05 16:20:32,835 WARN L205 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 127 DAG size of output: 68 [2021-06-05 16:20:49,600 WARN L205 SmtUtils]: Spent 4.96 s on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2021-06-05 16:20:59,575 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 16:21:02,760 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 141 DAG size of output: 51 [2021-06-05 16:21:12,164 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2021-06-05 16:21:31,287 WARN L205 SmtUtils]: Spent 5.75 s on a formula simplification. DAG size of input: 129 DAG size of output: 60 [2021-06-05 16:21:46,104 WARN L205 SmtUtils]: Spent 5.61 s on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2021-06-05 16:21:50,086 WARN L205 SmtUtils]: Spent 2.95 s on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2021-06-05 16:22:05,171 WARN L205 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-06-05 16:22:24,932 WARN L205 SmtUtils]: Spent 11.01 s on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2021-06-05 16:22:52,166 WARN L205 SmtUtils]: Spent 10.37 s on a formula simplification. DAG size of input: 134 DAG size of output: 62 [2021-06-05 16:22:59,871 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 16:23:04,246 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2021-06-05 16:23:31,840 WARN L205 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2021-06-05 16:24:09,935 WARN L205 SmtUtils]: Spent 10.15 s on a formula simplification. DAG size of input: 117 DAG size of output: 65 [2021-06-05 16:24:23,180 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-06-05 16:24:35,205 WARN L205 SmtUtils]: Spent 3.88 s on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-05 16:24:42,531 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-06-05 16:25:30,432 WARN L205 SmtUtils]: Spent 7.01 s on a formula simplification. DAG size of input: 145 DAG size of output: 52 [2021-06-05 16:25:50,177 WARN L205 SmtUtils]: Spent 9.21 s on a formula simplification. DAG size of input: 102 DAG size of output: 65 [2021-06-05 16:26:01,275 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-06-05 16:26:09,239 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-06-05 16:26:31,274 WARN L205 SmtUtils]: Spent 5.16 s on a formula simplification. DAG size of input: 120 DAG size of output: 63 [2021-06-05 16:26:51,656 WARN L205 SmtUtils]: Spent 8.31 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-06-05 16:27:17,287 WARN L205 SmtUtils]: Spent 9.22 s on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-06-05 16:27:49,341 WARN L205 SmtUtils]: Spent 5.62 s on a formula simplification. DAG size of input: 122 DAG size of output: 65 [2021-06-05 16:28:01,455 WARN L205 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-06-05 16:28:08,275 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-06-05 16:28:36,473 WARN L205 SmtUtils]: Spent 10.83 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-06-05 16:28:53,628 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 41 Received shutdown request... [2021-06-05 16:29:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 16:29:03,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 16:29:03,263 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:29:03,265 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:29:03,267 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:29:03,267 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:29:03 BasicIcfg [2021-06-05 16:29:03,267 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:29:03,267 INFO L168 Benchmark]: Toolchain (without parser) took 868488.23 ms. Allocated memory was 335.5 MB in the beginning and 589.3 MB in the end (delta: 253.8 MB). Free memory was 315.0 MB in the beginning and 398.0 MB in the end (delta: -83.0 MB). Peak memory consumption was 172.9 MB. Max. memory is 16.0 GB. [2021-06-05 16:29:03,268 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 335.5 MB. Free memory was 316.2 MB in the beginning and 316.1 MB in the end (delta: 65.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:29:03,268 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.22 ms. Allocated memory is still 335.5 MB. Free memory was 314.9 MB in the beginning and 313.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:29:03,268 INFO L168 Benchmark]: Boogie Preprocessor took 20.95 ms. Allocated memory is still 335.5 MB. Free memory was 313.5 MB in the beginning and 312.5 MB in the end (delta: 963.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 16:29:03,268 INFO L168 Benchmark]: RCFGBuilder took 212.46 ms. Allocated memory is still 335.5 MB. Free memory was 312.5 MB in the beginning and 299.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 16:29:03,268 INFO L168 Benchmark]: TraceAbstraction took 868223.28 ms. Allocated memory was 335.5 MB in the beginning and 589.3 MB in the end (delta: 253.8 MB). Free memory was 299.3 MB in the beginning and 398.0 MB in the end (delta: -98.7 MB). Peak memory consumption was 158.2 MB. Max. memory is 16.0 GB. [2021-06-05 16:29:03,268 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 0.14 ms. Allocated memory is still 335.5 MB. Free memory was 316.2 MB in the beginning and 316.1 MB in the end (delta: 65.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.22 ms. Allocated memory is still 335.5 MB. Free memory was 314.9 MB in the beginning and 313.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.95 ms. Allocated memory is still 335.5 MB. Free memory was 313.5 MB in the beginning and 312.5 MB in the end (delta: 963.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 212.46 ms. Allocated memory is still 335.5 MB. Free memory was 312.5 MB in the beginning and 299.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 868223.28 ms. Allocated memory was 335.5 MB in the beginning and 589.3 MB in the end (delta: 253.8 MB). Free memory was 299.3 MB in the beginning and 398.0 MB in the end (delta: -98.7 MB). Peak memory consumption was 158.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1653states) and FLOYD_HOARE automaton (currently 118 states, 51 states before enhancement),while ReachableStatesComputation was computing reachable states (2880 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1653states) and FLOYD_HOARE automaton (currently 118 states, 51 states before enhancement),while ReachableStatesComputation was computing reachable states (2880 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1653states) and FLOYD_HOARE automaton (currently 118 states, 51 states before enhancement),while ReachableStatesComputation was computing reachable states (2880 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 868153.8ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 43.7ms, AutomataDifference: 804759.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1121 SDtfs, 5171 SDslu, 11814 SDs, 0 SdLazy, 27932 SolverSat, 3122 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 140491.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1806 GetRequests, 591 SyntacticMatches, 44 SemanticMatches, 1171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36126 ImplicationChecksByTransitivity, 700821.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1653occurred in iteration=22, InterpolantAutomatonStates: 750, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 488.0ms AutomataMinimizationTime, 22 MinimizatonAttempts, 19446 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 114.8ms SsaConstructionTime, 480.3ms SatisfiabilityAnalysisTime, 57094.6ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 296 QuantifiedInterpolants, 27566 SizeOfPredicates, 225 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 538 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 268/1315 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown